--- /dev/null
+Regulator DT binding for MAX77620 Power management IC from Maxim Semiconductor.
+
+Device has multiple DCDC(sd[0-3] and LDOs(ldo[0-8]). The input supply
+of these regulators are defined under parent device node.
+Details of regulator properties are defined as child node under
+sub-node "regulators" which is child node of device node.
+
+Please refer file <Documentation/devicetree/bindings/regulator/regulator.txt>
+for common regulator bindings used by client.
+
+Following are properties of parent node related to regulators.
+
+Optional properties:
+-------------------
+The input supply of regulators are the optional properties on the
+parent device node. The input supply of these regulators are provided
+through following properties:
+in-sd0-supply: Input supply for SD0, INA-SD0 or INB-SD0 pins.
+in-sd1-supply: Input supply for SD1.
+in-sd2-supply: Input supply for SD2.
+in-sd3-supply: Input supply for SD3.
+in-ldo0-1-supply: Input supply for LDO0 and LDO1.
+in-ldo2-supply: Input supply for LDO2.
+in-ldo3-5-supply: Input supply for LDO3 and LDO5
+in-ldo4-6-supply: Input supply for LDO4 and LDO6.
+in-ldo7-8-supply: Input supply for LDO7 and LDO8.
+
+Optional sub nodes for regulators under "regulators" subnode:
+------------------------------------------------------------
+The subnodes name is the name of regulator and it must be one of:
+ sd[0-3], ldo[0-8]
+
+Each sub-node should contain the constraints and initialization
+information for that regulator. The definition for each of these
+nodes is defined using the standard binding for regulators found at
+<Documentation/devicetree/bindings/regulator/regulator.txt>.
+
+Theres are also additional properties for SD/LDOs. These additional properties
+are required to configure FPS configuration parameters for SDs and LDOs.
+Please refer <devicetree/bindings/mfd/max77620.txt> for more detail of Flexible
+Power Sequence (FPS).
+Following are additional properties:
+
+- maxim,active-fps-source: FPS source for the regulators to get
+ enabled/disabled when system is in
+ active state. Valid values are:
+ - MAX77620_FPS_SRC_0,
+ FPS source is FPS0.
+ - MAX77620_FPS_SRC_1,
+ FPS source is FPS1
+ - MAX77620_FPS_SRC_2 and
+ FPS source is FPS2
+ - MAX77620_FPS_SRC_NONE.
+ Regulator is not controlled
+ by FPS events and it gets
+ enabled/disabled by register
+ access.
+ Absence of this property will leave
+ the FPS configuration register for that
+ regulator to default configuration.
+
+- maxim,active-fps-power-up-slot: Sequencing event slot number on which
+ the regulator get enabled when
+ master FPS input event set to HIGH.
+ Valid values are 0 to 7.
+ This is applicable if FPS source is
+ selected as FPS0, FPS1 or FPS2.
+
+- maxim,active-fps-power-down-slot: Sequencing event slot number on which
+ the regulator get disabled when master
+ FPS input event set to LOW.
+ Valid values are 0 to 7.
+ This is applicable if FPS source is
+ selected as FPS0, FPS1 or FPS2.
+
+- maxim,suspend-fps-source: This is same as property
+ "maxim,active-fps-source" but value
+ get configured when system enters in
+ to suspend state.
+
+- maxim,suspend-fps-power-up-slot: This is same as property
+ "maxim,active-fps-power-up-slot" but
+ this value get configured into FPS
+ configuration register when system
+ enters into suspend.
+ This is applicable if suspend state
+ FPS source is selected as FPS0, FPS1 or
+
+- maxim,suspend-fps-power-down-slot: This is same as property
+ "maxim,active-fps-power-down-slot" but
+ this value get configured into FPS
+ configuration register when system
+ enters into suspend.
+ This is applicable if suspend state
+ FPS source is selected as FPS0, FPS1 or
+ FPS2.
+
+Example:
+--------
+#include <dt-bindings/mfd/max77620.h>
+...
+max77620@3c {
+ in-ldo0-1-supply = <&max77620_sd2>;
+ in-ldo7-8-supply = <&max77620_sd2>;
+ regulators {
+ sd0 {
+ regulator-name = "vdd-core";
+ regulator-min-microvolt = <600000>;
+ regulator-max-microvolt = <1400000>;
+ regulator-boot-on;
+ regulator-always-on;
+ maxim,active-fps-source = <MAX77620_FPS_SRC_1>;
+ };
+
+ sd1 {
+ regulator-name = "vddio-ddr";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ regulator-always-on;
+ regulator-boot-on;
+ maxim,active-fps-source = <MAX77620_FPS_SRC_0>;
+ };
+
+ sd2 {
+ regulator-name = "vdd-pre-reg";
+ regulator-min-microvolt = <1350000>;
+ regulator-max-microvolt = <1350000>;
+ };
+
+ sd3 {
+ regulator-name = "vdd-1v8";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ ldo0 {
+ regulator-name = "avdd-sys";
+ regulator-min-microvolt = <1200000>;
+ regulator-max-microvolt = <1200000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ ldo1 {
+ regulator-name = "vdd-pex";
+ regulator-min-microvolt = <1050000>;
+ regulator-max-microvolt = <1050000>;
+ };
+
+ ldo2 {
+ regulator-name = "vddio-sdmmc3";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ };
+
+ ldo3 {
+ regulator-name = "vdd-cam-hv";
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ };
+
+ ldo4 {
+ regulator-name = "vdd-rtc";
+ regulator-min-microvolt = <1250000>;
+ regulator-max-microvolt = <1250000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ ldo5 {
+ regulator-name = "avdd-ts-hv";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <3000000>;
+ };
+
+ ldo6 {
+ regulator-name = "vdd-ts";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ ldo7 {
+ regulator-name = "vdd-gen-pll-edp";
+ regulator-min-microvolt = <1050000>;
+ regulator-max-microvolt = <1050000>;
+ regulator-always-on;
+ regulator-boot-on;
+ };
+
+ ldo8 {
+ regulator-name = "vdd-hdmi-dp";
+ regulator-min-microvolt = <1050000>;
+ regulator-max-microvolt = <1050000>;
+ };
+ };
+};
M: Javier Martinez Canillas <javier@osg.samsung.com>
L: linux-kernel@vger.kernel.org
S: Supported
-F: drivers/*/*max77802.c
+F: drivers/*/*max77802*.c
F: Documentation/devicetree/bindings/*/*max77802.txt
F: include/dt-bindings/*/*max77802.h
L: linux-kernel@vger.kernel.org
S: Supported
F: drivers/*/max14577.c
-F: drivers/*/max77686.c
+F: drivers/*/max77686*.c
F: drivers/*/max77693.c
F: drivers/extcon/extcon-max14577.c
F: drivers/extcon/extcon-max77693.c
regulator via I2C bus. The provided regulator is suitable
for PXA27x chips to control VCC_CORE and VCC_USIM voltages.
+config REGULATOR_MAX77620
+ tristate "Maxim 77620/MAX20024 voltage regulator"
+ depends on MFD_MAX77620
+ help
+ This driver controls Maxim MAX77620 voltage output regulator
+ via I2C bus. The provided regulator is suitable for Tegra
+ chip to control Step-Down DC-DC and LDOs. Say Y here to
+ enable the regulator driver.
+
config REGULATOR_MAX8649
tristate "Maxim 8649 voltage regulator"
depends on I2C
obj-$(CONFIG_REGULATOR_LTC3589) += ltc3589.o
obj-$(CONFIG_REGULATOR_MAX14577) += max14577.o
obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
+obj-$(CONFIG_REGULATOR_MAX77620) += max77620-regulator.o
obj-$(CONFIG_REGULATOR_MAX8649) += max8649.o
obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o
obj-$(CONFIG_REGULATOR_MAX8907) += max8907-regulator.o
obj-$(CONFIG_REGULATOR_MAX8973) += max8973-regulator.o
obj-$(CONFIG_REGULATOR_MAX8997) += max8997.o
obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o
-obj-$(CONFIG_REGULATOR_MAX77686) += max77686.o
+obj-$(CONFIG_REGULATOR_MAX77686) += max77686-regulator.o
obj-$(CONFIG_REGULATOR_MAX77693) += max77693.o
-obj-$(CONFIG_REGULATOR_MAX77802) += max77802.o
+obj-$(CONFIG_REGULATOR_MAX77802) += max77802-regulator.o
obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o
}
}
+ if (rdev->constraints->active_discharge && ops->set_active_discharge) {
+ bool ad_state = (rdev->constraints->active_discharge ==
+ REGULATOR_ACTIVE_DISCHARGE_ENABLE) ? true : false;
+
+ ret = ops->set_active_discharge(rdev, ad_state);
+ if (ret < 0) {
+ rdev_err(rdev, "failed to set active discharge\n");
+ return ret;
+ }
+ }
+
print_constraints(rdev);
return 0;
}
}
}
- ret = devm_request_threaded_irq(dev, client->irq, NULL, ltc3589_isr,
- IRQF_TRIGGER_LOW | IRQF_ONESHOT,
- client->name, ltc3589);
- if (ret) {
- dev_err(dev, "Failed to request IRQ: %d\n", ret);
- return ret;
+ if (client->irq) {
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ ltc3589_isr,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ client->name, ltc3589);
+ if (ret) {
+ dev_err(dev, "Failed to request IRQ: %d\n", ret);
+ return ret;
+ }
}
return 0;
--- /dev/null
+/*
+ * Maxim MAX77620 Regulator driver
+ *
+ * Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Mallikarjun Kasoju <mkasoju@nvidia.com>
+ * Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/mfd/max77620.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+
+#define max77620_rails(_name) "max77620-"#_name
+
+/* Power Mode */
+#define MAX77620_POWER_MODE_NORMAL 3
+#define MAX77620_POWER_MODE_LPM 2
+#define MAX77620_POWER_MODE_GLPM 1
+#define MAX77620_POWER_MODE_DISABLE 0
+
+/* SD Slew Rate */
+#define MAX77620_SD_SR_13_75 0
+#define MAX77620_SD_SR_27_5 1
+#define MAX77620_SD_SR_55 2
+#define MAX77620_SD_SR_100 3
+
+enum max77620_regulators {
+ MAX77620_REGULATOR_ID_SD0,
+ MAX77620_REGULATOR_ID_SD1,
+ MAX77620_REGULATOR_ID_SD2,
+ MAX77620_REGULATOR_ID_SD3,
+ MAX77620_REGULATOR_ID_SD4,
+ MAX77620_REGULATOR_ID_LDO0,
+ MAX77620_REGULATOR_ID_LDO1,
+ MAX77620_REGULATOR_ID_LDO2,
+ MAX77620_REGULATOR_ID_LDO3,
+ MAX77620_REGULATOR_ID_LDO4,
+ MAX77620_REGULATOR_ID_LDO5,
+ MAX77620_REGULATOR_ID_LDO6,
+ MAX77620_REGULATOR_ID_LDO7,
+ MAX77620_REGULATOR_ID_LDO8,
+ MAX77620_NUM_REGS,
+};
+
+/* Regulator types */
+enum max77620_regulator_type {
+ MAX77620_REGULATOR_TYPE_SD,
+ MAX77620_REGULATOR_TYPE_LDO_N,
+ MAX77620_REGULATOR_TYPE_LDO_P,
+};
+
+struct max77620_regulator_info {
+ u8 type;
+ u8 fps_addr;
+ u8 volt_addr;
+ u8 cfg_addr;
+ u8 power_mode_mask;
+ u8 power_mode_shift;
+ u8 remote_sense_addr;
+ u8 remote_sense_mask;
+ struct regulator_desc desc;
+};
+
+struct max77620_regulator_pdata {
+ struct regulator_init_data *reg_idata;
+ int active_fps_src;
+ int active_fps_pd_slot;
+ int active_fps_pu_slot;
+ int suspend_fps_src;
+ int suspend_fps_pd_slot;
+ int suspend_fps_pu_slot;
+ int current_mode;
+};
+
+struct max77620_regulator {
+ struct device *dev;
+ struct regmap *rmap;
+ struct max77620_regulator_info *rinfo[MAX77620_NUM_REGS];
+ struct max77620_regulator_pdata reg_pdata[MAX77620_NUM_REGS];
+ int enable_power_mode[MAX77620_NUM_REGS];
+ int current_power_mode[MAX77620_NUM_REGS];
+ int active_fps_src[MAX77620_NUM_REGS];
+};
+
+#define fps_src_name(fps_src) \
+ (fps_src == MAX77620_FPS_SRC_0 ? "FPS_SRC_0" : \
+ fps_src == MAX77620_FPS_SRC_1 ? "FPS_SRC_1" : \
+ fps_src == MAX77620_FPS_SRC_2 ? "FPS_SRC_2" : "FPS_SRC_NONE")
+
+static int max77620_regulator_get_fps_src(struct max77620_regulator *pmic,
+ int id)
+{
+ struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val);
+ if (ret < 0) {
+ dev_err(pmic->dev, "Reg 0x%02x read failed %d\n",
+ rinfo->fps_addr, ret);
+ return ret;
+ }
+
+ return (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
+}
+
+static int max77620_regulator_set_fps_src(struct max77620_regulator *pmic,
+ int fps_src, int id)
+{
+ struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+ unsigned int val;
+ int ret;
+
+ switch (fps_src) {
+ case MAX77620_FPS_SRC_0:
+ case MAX77620_FPS_SRC_1:
+ case MAX77620_FPS_SRC_2:
+ case MAX77620_FPS_SRC_NONE:
+ break;
+
+ case MAX77620_FPS_SRC_DEF:
+ ret = regmap_read(pmic->rmap, rinfo->fps_addr, &val);
+ if (ret < 0) {
+ dev_err(pmic->dev, "Reg 0x%02x read failed %d\n",
+ rinfo->fps_addr, ret);
+ return ret;
+ }
+ ret = (val & MAX77620_FPS_SRC_MASK) >> MAX77620_FPS_SRC_SHIFT;
+ pmic->active_fps_src[id] = ret;
+ return 0;
+
+ default:
+ dev_err(pmic->dev, "Invalid FPS %d for regulator %d\n",
+ fps_src, id);
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr,
+ MAX77620_FPS_SRC_MASK,
+ fps_src << MAX77620_FPS_SRC_SHIFT);
+ if (ret < 0) {
+ dev_err(pmic->dev, "Reg 0x%02x update failed %d\n",
+ rinfo->fps_addr, ret);
+ return ret;
+ }
+ pmic->active_fps_src[id] = fps_src;
+
+ return 0;
+}
+
+static int max77620_regulator_set_fps_slots(struct max77620_regulator *pmic,
+ int id, bool is_suspend)
+{
+ struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
+ struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+ unsigned int val = 0;
+ unsigned int mask = 0;
+ int pu = rpdata->active_fps_pu_slot;
+ int pd = rpdata->active_fps_pd_slot;
+ int ret = 0;
+
+ if (is_suspend) {
+ pu = rpdata->suspend_fps_pu_slot;
+ pd = rpdata->suspend_fps_pd_slot;
+ }
+
+ /* FPS power up period setting */
+ if (pu >= 0) {
+ val |= (pu << MAX77620_FPS_PU_PERIOD_SHIFT);
+ mask |= MAX77620_FPS_PU_PERIOD_MASK;
+ }
+
+ /* FPS power down period setting */
+ if (pd >= 0) {
+ val |= (pd << MAX77620_FPS_PD_PERIOD_SHIFT);
+ mask |= MAX77620_FPS_PD_PERIOD_MASK;
+ }
+
+ if (mask) {
+ ret = regmap_update_bits(pmic->rmap, rinfo->fps_addr,
+ mask, val);
+ if (ret < 0) {
+ dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
+ rinfo->fps_addr, ret);
+ return ret;
+ }
+ }
+
+ return ret;
+}
+
+static int max77620_regulator_set_power_mode(struct max77620_regulator *pmic,
+ int power_mode, int id)
+{
+ struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+ u8 mask = rinfo->power_mode_mask;
+ u8 shift = rinfo->power_mode_shift;
+ u8 addr;
+ int ret;
+
+ switch (rinfo->type) {
+ case MAX77620_REGULATOR_TYPE_SD:
+ addr = rinfo->cfg_addr;
+ break;
+ default:
+ addr = rinfo->volt_addr;
+ break;
+ }
+
+ ret = regmap_update_bits(pmic->rmap, addr, mask, power_mode << shift);
+ if (ret < 0) {
+ dev_err(pmic->dev, "Regulator %d mode set failed: %d\n",
+ id, ret);
+ return ret;
+ }
+ pmic->current_power_mode[id] = power_mode;
+
+ return ret;
+}
+
+static int max77620_regulator_get_power_mode(struct max77620_regulator *pmic,
+ int id)
+{
+ struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+ unsigned int val, addr;
+ u8 mask = rinfo->power_mode_mask;
+ u8 shift = rinfo->power_mode_shift;
+ int ret;
+
+ switch (rinfo->type) {
+ case MAX77620_REGULATOR_TYPE_SD:
+ addr = rinfo->cfg_addr;
+ break;
+ default:
+ addr = rinfo->volt_addr;
+ break;
+ }
+
+ ret = regmap_read(pmic->rmap, addr, &val);
+ if (ret < 0) {
+ dev_err(pmic->dev, "Regulator %d: Reg 0x%02x read failed: %d\n",
+ id, addr, ret);
+ return ret;
+ }
+
+ return (val & mask) >> shift;
+}
+
+static int max77620_read_slew_rate(struct max77620_regulator *pmic, int id)
+{
+ struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+ unsigned int rval;
+ int slew_rate;
+ int ret;
+
+ ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &rval);
+ if (ret < 0) {
+ dev_err(pmic->dev, "Register 0x%02x read failed: %d\n",
+ rinfo->cfg_addr, ret);
+ return ret;
+ }
+
+ switch (rinfo->type) {
+ case MAX77620_REGULATOR_TYPE_SD:
+ slew_rate = (rval >> MAX77620_SD_SR_SHIFT) & 0x3;
+ switch (slew_rate) {
+ case 0:
+ slew_rate = 13750;
+ break;
+ case 1:
+ slew_rate = 27500;
+ break;
+ case 2:
+ slew_rate = 55000;
+ break;
+ case 3:
+ slew_rate = 100000;
+ break;
+ }
+ rinfo->desc.ramp_delay = slew_rate;
+ break;
+ default:
+ slew_rate = rval & 0x1;
+ switch (slew_rate) {
+ case 0:
+ slew_rate = 100000;
+ break;
+ case 1:
+ slew_rate = 5000;
+ break;
+ }
+ rinfo->desc.ramp_delay = slew_rate;
+ break;
+ }
+
+ return 0;
+}
+
+static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
+{
+ struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
+ int ret;
+
+ /* Update power mode */
+ ret = max77620_regulator_get_power_mode(pmic, id);
+ if (ret < 0)
+ return ret;
+
+ pmic->current_power_mode[id] = ret;
+ pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
+
+ if (rpdata->active_fps_src == MAX77620_FPS_SRC_DEF) {
+ ret = max77620_regulator_get_fps_src(pmic, id);
+ if (ret < 0)
+ return ret;
+ rpdata->active_fps_src = ret;
+ }
+
+ /* If rails are externally control of FPS then enable it always. */
+ if (rpdata->active_fps_src == MAX77620_FPS_SRC_NONE) {
+ ret = max77620_regulator_set_power_mode(pmic,
+ pmic->enable_power_mode[id], id);
+ if (ret < 0)
+ return ret;
+ } else {
+ if (pmic->current_power_mode[id] !=
+ pmic->enable_power_mode[id]) {
+ ret = max77620_regulator_set_power_mode(pmic,
+ pmic->enable_power_mode[id], id);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ ret = max77620_regulator_set_fps_src(pmic, rpdata->active_fps_src, id);
+ if (ret < 0)
+ return ret;
+
+ ret = max77620_regulator_set_fps_slots(pmic, id, false);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int max77620_regulator_enable(struct regulator_dev *rdev)
+{
+ struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+
+ if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
+ return 0;
+
+ return max77620_regulator_set_power_mode(pmic,
+ pmic->enable_power_mode[id], id);
+}
+
+static int max77620_regulator_disable(struct regulator_dev *rdev)
+{
+ struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+
+ if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
+ return 0;
+
+ return max77620_regulator_set_power_mode(pmic,
+ MAX77620_POWER_MODE_DISABLE, id);
+}
+
+static int max77620_regulator_is_enabled(struct regulator_dev *rdev)
+{
+ struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ int ret = 1;
+
+ if (pmic->active_fps_src[id] != MAX77620_FPS_SRC_NONE)
+ return 1;
+
+ ret = max77620_regulator_get_power_mode(pmic, id);
+ if (ret < 0)
+ return ret;
+
+ if (ret != MAX77620_POWER_MODE_DISABLE)
+ return 1;
+
+ return 0;
+}
+
+static int max77620_regulator_set_mode(struct regulator_dev *rdev,
+ unsigned int mode)
+{
+ struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+ struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
+ bool fpwm = false;
+ int power_mode;
+ int ret;
+ u8 val;
+
+ switch (mode) {
+ case REGULATOR_MODE_FAST:
+ fpwm = true;
+ power_mode = MAX77620_POWER_MODE_NORMAL;
+ break;
+
+ case REGULATOR_MODE_NORMAL:
+ power_mode = MAX77620_POWER_MODE_NORMAL;
+ break;
+
+ case REGULATOR_MODE_IDLE:
+ power_mode = MAX77620_POWER_MODE_LPM;
+ break;
+
+ default:
+ dev_err(pmic->dev, "Regulator %d mode %d is invalid\n",
+ id, mode);
+ return -EINVAL;
+ }
+
+ if (rinfo->type != MAX77620_REGULATOR_TYPE_SD)
+ goto skip_fpwm;
+
+ val = (fpwm) ? MAX77620_SD_FPWM_MASK : 0;
+ ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr,
+ MAX77620_SD_FPWM_MASK, val);
+ if (ret < 0) {
+ dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
+ rinfo->cfg_addr, ret);
+ return ret;
+ }
+ rpdata->current_mode = mode;
+
+skip_fpwm:
+ ret = max77620_regulator_set_power_mode(pmic, power_mode, id);
+ if (ret < 0)
+ return ret;
+
+ pmic->enable_power_mode[id] = power_mode;
+
+ return 0;
+}
+
+static unsigned int max77620_regulator_get_mode(struct regulator_dev *rdev)
+{
+ struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+ int fpwm = 0;
+ int ret;
+ int pm_mode, reg_mode;
+ unsigned int val;
+
+ ret = max77620_regulator_get_power_mode(pmic, id);
+ if (ret < 0)
+ return 0;
+
+ pm_mode = ret;
+
+ if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
+ ret = regmap_read(pmic->rmap, rinfo->cfg_addr, &val);
+ if (ret < 0) {
+ dev_err(pmic->dev, "Reg 0x%02x read failed: %d\n",
+ rinfo->cfg_addr, ret);
+ return ret;
+ }
+ fpwm = !!(val & MAX77620_SD_FPWM_MASK);
+ }
+
+ switch (pm_mode) {
+ case MAX77620_POWER_MODE_NORMAL:
+ case MAX77620_POWER_MODE_DISABLE:
+ if (fpwm)
+ reg_mode = REGULATOR_MODE_FAST;
+ else
+ reg_mode = REGULATOR_MODE_NORMAL;
+ break;
+ case MAX77620_POWER_MODE_LPM:
+ case MAX77620_POWER_MODE_GLPM:
+ reg_mode = REGULATOR_MODE_IDLE;
+ break;
+ default:
+ return 0;
+ }
+
+ return reg_mode;
+}
+
+static int max77620_regulator_set_ramp_delay(struct regulator_dev *rdev,
+ int ramp_delay)
+{
+ struct max77620_regulator *pmic = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ struct max77620_regulator_info *rinfo = pmic->rinfo[id];
+ int ret, val;
+ u8 mask;
+
+ if (rinfo->type == MAX77620_REGULATOR_TYPE_SD) {
+ if (ramp_delay <= 13750)
+ val = 0;
+ else if (ramp_delay <= 27500)
+ val = 1;
+ else if (ramp_delay <= 55000)
+ val = 2;
+ else
+ val = 3;
+ val <<= MAX77620_SD_SR_SHIFT;
+ mask = MAX77620_SD_SR_MASK;
+ } else {
+ if (ramp_delay <= 5000)
+ val = 1;
+ else
+ val = 0;
+ mask = MAX77620_LDO_SLEW_RATE_MASK;
+ }
+
+ ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr, mask, val);
+ if (ret < 0)
+ dev_err(pmic->dev, "Reg 0x%02x update failed: %d\n",
+ rinfo->cfg_addr, ret);
+
+ return ret;
+}
+
+static int max77620_of_parse_cb(struct device_node *np,
+ const struct regulator_desc *desc,
+ struct regulator_config *config)
+{
+ struct max77620_regulator *pmic = config->driver_data;
+ struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[desc->id];
+ u32 pval;
+ int ret;
+
+ ret = of_property_read_u32(np, "maxim,active-fps-source", &pval);
+ rpdata->active_fps_src = (!ret) ? pval : MAX77620_FPS_SRC_DEF;
+
+ ret = of_property_read_u32(np, "maxim,active-fps-power-up-slot", &pval);
+ rpdata->active_fps_pu_slot = (!ret) ? pval : -1;
+
+ ret = of_property_read_u32(
+ np, "maxim,active-fps-power-down-slot", &pval);
+ rpdata->active_fps_pd_slot = (!ret) ? pval : -1;
+
+ ret = of_property_read_u32(np, "maxim,suspend-fps-source", &pval);
+ rpdata->suspend_fps_src = (!ret) ? pval : -1;
+
+ ret = of_property_read_u32(
+ np, "maxim,suspend-fps-power-up-slot", &pval);
+ rpdata->suspend_fps_pu_slot = (!ret) ? pval : -1;
+
+ ret = of_property_read_u32(
+ np, "maxim,suspend-fps-power-down-slot", &pval);
+ rpdata->suspend_fps_pd_slot = (!ret) ? pval : -1;
+
+ return max77620_init_pmic(pmic, desc->id);
+}
+
+static struct regulator_ops max77620_regulator_ops = {
+ .is_enabled = max77620_regulator_is_enabled,
+ .enable = max77620_regulator_enable,
+ .disable = max77620_regulator_disable,
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_mode = max77620_regulator_set_mode,
+ .get_mode = max77620_regulator_get_mode,
+ .set_ramp_delay = max77620_regulator_set_ramp_delay,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_active_discharge = regulator_set_active_discharge_regmap,
+};
+
+#define MAX77620_SD_CNF2_ROVS_EN_NONE 0
+#define RAIL_SD(_id, _name, _sname, _volt_mask, _min_uV, _max_uV, \
+ _step_uV, _rs_add, _rs_mask) \
+ [MAX77620_REGULATOR_ID_##_id] = { \
+ .type = MAX77620_REGULATOR_TYPE_SD, \
+ .volt_addr = MAX77620_REG_##_id, \
+ .cfg_addr = MAX77620_REG_##_id##_CFG, \
+ .fps_addr = MAX77620_REG_FPS_##_id, \
+ .remote_sense_addr = _rs_add, \
+ .remote_sense_mask = MAX77620_SD_CNF2_ROVS_EN_##_rs_mask, \
+ .power_mode_mask = MAX77620_SD_POWER_MODE_MASK, \
+ .power_mode_shift = MAX77620_SD_POWER_MODE_SHIFT, \
+ .desc = { \
+ .name = max77620_rails(_name), \
+ .of_match = of_match_ptr(#_name), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .of_parse_cb = max77620_of_parse_cb, \
+ .supply_name = _sname, \
+ .id = MAX77620_REGULATOR_ID_##_id, \
+ .ops = &max77620_regulator_ops, \
+ .n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \
+ .min_uV = _min_uV, \
+ .uV_step = _step_uV, \
+ .enable_time = 500, \
+ .vsel_mask = MAX77620_##_volt_mask##_VOLT_MASK, \
+ .vsel_reg = MAX77620_REG_##_id, \
+ .active_discharge_off = 0, \
+ .active_discharge_on = MAX77620_SD_CFG1_ADE_ENABLE, \
+ .active_discharge_mask = MAX77620_SD_CFG1_ADE_MASK, \
+ .active_discharge_reg = MAX77620_REG_##_id##_CFG, \
+ .type = REGULATOR_VOLTAGE, \
+ }, \
+ }
+
+#define RAIL_LDO(_id, _name, _sname, _type, _min_uV, _max_uV, _step_uV) \
+ [MAX77620_REGULATOR_ID_##_id] = { \
+ .type = MAX77620_REGULATOR_TYPE_LDO_##_type, \
+ .volt_addr = MAX77620_REG_##_id##_CFG, \
+ .cfg_addr = MAX77620_REG_##_id##_CFG2, \
+ .fps_addr = MAX77620_REG_FPS_##_id, \
+ .remote_sense_addr = 0xFF, \
+ .power_mode_mask = MAX77620_LDO_POWER_MODE_MASK, \
+ .power_mode_shift = MAX77620_LDO_POWER_MODE_SHIFT, \
+ .desc = { \
+ .name = max77620_rails(_name), \
+ .of_match = of_match_ptr(#_name), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .of_parse_cb = max77620_of_parse_cb, \
+ .supply_name = _sname, \
+ .id = MAX77620_REGULATOR_ID_##_id, \
+ .ops = &max77620_regulator_ops, \
+ .n_voltages = ((_max_uV - _min_uV) / _step_uV) + 1, \
+ .min_uV = _min_uV, \
+ .uV_step = _step_uV, \
+ .enable_time = 500, \
+ .vsel_mask = MAX77620_LDO_VOLT_MASK, \
+ .vsel_reg = MAX77620_REG_##_id##_CFG, \
+ .active_discharge_off = 0, \
+ .active_discharge_on = MAX77620_LDO_CFG2_ADE_ENABLE, \
+ .active_discharge_mask = MAX77620_LDO_CFG2_ADE_MASK, \
+ .active_discharge_reg = MAX77620_REG_##_id##_CFG2, \
+ .type = REGULATOR_VOLTAGE, \
+ }, \
+ }
+
+static struct max77620_regulator_info max77620_regs_info[MAX77620_NUM_REGS] = {
+ RAIL_SD(SD0, sd0, "in-sd0", SD0, 600000, 1400000, 12500, 0x22, SD0),
+ RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 1550000, 12500, 0x22, SD1),
+ RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
+ RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
+ RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE),
+
+ RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
+ RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
+ RAIL_LDO(LDO2, ldo2, "in-ldo2", P, 800000, 3950000, 50000),
+ RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
+ RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
+ RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
+ RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
+ RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
+ RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
+};
+
+static struct max77620_regulator_info max20024_regs_info[MAX77620_NUM_REGS] = {
+ RAIL_SD(SD0, sd0, "in-sd0", SD0, 800000, 1587500, 12500, 0x22, SD0),
+ RAIL_SD(SD1, sd1, "in-sd1", SD1, 600000, 3387500, 12500, 0x22, SD1),
+ RAIL_SD(SD2, sd2, "in-sd2", SDX, 600000, 3787500, 12500, 0xFF, NONE),
+ RAIL_SD(SD3, sd3, "in-sd3", SDX, 600000, 3787500, 12500, 0xFF, NONE),
+ RAIL_SD(SD4, sd4, "in-sd4", SDX, 600000, 3787500, 12500, 0xFF, NONE),
+
+ RAIL_LDO(LDO0, ldo0, "in-ldo0-1", N, 800000, 2375000, 25000),
+ RAIL_LDO(LDO1, ldo1, "in-ldo0-1", N, 800000, 2375000, 25000),
+ RAIL_LDO(LDO2, ldo2, "in-ldo2", P, 800000, 3950000, 50000),
+ RAIL_LDO(LDO3, ldo3, "in-ldo3-5", P, 800000, 3950000, 50000),
+ RAIL_LDO(LDO4, ldo4, "in-ldo4-6", P, 800000, 1587500, 12500),
+ RAIL_LDO(LDO5, ldo5, "in-ldo3-5", P, 800000, 3950000, 50000),
+ RAIL_LDO(LDO6, ldo6, "in-ldo4-6", P, 800000, 3950000, 50000),
+ RAIL_LDO(LDO7, ldo7, "in-ldo7-8", N, 800000, 3950000, 50000),
+ RAIL_LDO(LDO8, ldo8, "in-ldo7-8", N, 800000, 3950000, 50000),
+};
+
+static int max77620_regulator_probe(struct platform_device *pdev)
+{
+ struct max77620_chip *max77620_chip = dev_get_drvdata(pdev->dev.parent);
+ struct max77620_regulator_info *rinfo;
+ struct device *dev = &pdev->dev;
+ struct regulator_config config = { };
+ struct max77620_regulator *pmic;
+ int ret = 0;
+ int id;
+
+ pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
+ if (!pmic)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, pmic);
+ pmic->dev = dev;
+ pmic->rmap = max77620_chip->rmap;
+ if (!dev->of_node)
+ dev->of_node = pdev->dev.parent->of_node;
+
+ switch (max77620_chip->chip_id) {
+ case MAX77620:
+ rinfo = max77620_regs_info;
+ break;
+ default:
+ rinfo = max20024_regs_info;
+ break;
+ }
+
+ config.regmap = pmic->rmap;
+ config.dev = dev;
+ config.driver_data = pmic;
+
+ for (id = 0; id < MAX77620_NUM_REGS; id++) {
+ struct regulator_dev *rdev;
+ struct regulator_desc *rdesc;
+
+ if ((max77620_chip->chip_id == MAX77620) &&
+ (id == MAX77620_REGULATOR_ID_SD4))
+ continue;
+
+ rdesc = &rinfo[id].desc;
+ pmic->rinfo[id] = &max77620_regs_info[id];
+ pmic->enable_power_mode[id] = MAX77620_POWER_MODE_NORMAL;
+
+ ret = max77620_read_slew_rate(pmic, id);
+ if (ret < 0)
+ return ret;
+
+ rdev = devm_regulator_register(dev, rdesc, &config);
+ if (IS_ERR(rdev)) {
+ ret = PTR_ERR(rdev);
+ dev_err(dev, "Regulator registration %s failed: %d\n",
+ rdesc->name, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int max77620_regulator_suspend(struct device *dev)
+{
+ struct max77620_regulator *pmic = dev_get_drvdata(dev);
+ struct max77620_regulator_pdata *reg_pdata;
+ int id;
+
+ for (id = 0; id < MAX77620_NUM_REGS; id++) {
+ reg_pdata = &pmic->reg_pdata[id];
+
+ max77620_regulator_set_fps_slots(pmic, id, true);
+ if (reg_pdata->suspend_fps_src < 0)
+ continue;
+
+ max77620_regulator_set_fps_src(pmic, reg_pdata->suspend_fps_src,
+ id);
+ }
+
+ return 0;
+}
+
+static int max77620_regulator_resume(struct device *dev)
+{
+ struct max77620_regulator *pmic = dev_get_drvdata(dev);
+ struct max77620_regulator_pdata *reg_pdata;
+ int id;
+
+ for (id = 0; id < MAX77620_NUM_REGS; id++) {
+ reg_pdata = &pmic->reg_pdata[id];
+
+ max77620_regulator_set_fps_slots(pmic, id, false);
+ if (reg_pdata->active_fps_src < 0)
+ continue;
+ max77620_regulator_set_fps_src(pmic, reg_pdata->active_fps_src,
+ id);
+ }
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops max77620_regulator_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(max77620_regulator_suspend,
+ max77620_regulator_resume)
+};
+
+static const struct platform_device_id max77620_regulator_devtype[] = {
+ { .name = "max77620-pmic", },
+ { .name = "max20024-pmic", },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, max77620_regulator_devtype);
+
+static struct platform_driver max77620_regulator_driver = {
+ .probe = max77620_regulator_probe,
+ .id_table = max77620_regulator_devtype,
+ .driver = {
+ .name = "max77620-pmic",
+ .pm = &max77620_regulator_pm_ops,
+ },
+};
+
+module_platform_driver(max77620_regulator_driver);
+
+MODULE_DESCRIPTION("MAX77620/MAX20024 regulator driver");
+MODULE_AUTHOR("Mallikarjun Kasoju <mkasoju@nvidia.com>");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * max77686.c - Regulator driver for the Maxim 77686
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * Chiwoong Byun <woong.byun@samsung.com>
+ * Jonghwa Lee <jonghwa3.lee@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * This driver is based on max8997.c
+ */
+
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/max77686.h>
+#include <linux/mfd/max77686-private.h>
+
+#define MAX77686_LDO_MINUV 800000
+#define MAX77686_LDO_UVSTEP 50000
+#define MAX77686_LDO_LOW_MINUV 800000
+#define MAX77686_LDO_LOW_UVSTEP 25000
+#define MAX77686_BUCK_MINUV 750000
+#define MAX77686_BUCK_UVSTEP 50000
+#define MAX77686_RAMP_DELAY 100000 /* uV/us */
+#define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
+#define MAX77686_DVS_MINUV 600000
+#define MAX77686_DVS_UVSTEP 12500
+
+/*
+ * Value for configuring buck[89] and LDO{20,21,22} as GPIO control.
+ * It is the same as 'off' for other regulators.
+ */
+#define MAX77686_GPIO_CONTROL 0x0
+/*
+ * Values used for configuring LDOs and bucks.
+ * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
+ */
+#define MAX77686_LDO_LOWPOWER 0x1
+/*
+ * On/off controlled by PWRREQ:
+ * - LDO2, 6-8, 10-12, 14-16
+ * - buck[1234]
+ */
+#define MAX77686_OFF_PWRREQ 0x1
+/* Low power mode controlled by PWRREQ: All LDOs */
+#define MAX77686_LDO_LOWPOWER_PWRREQ 0x2
+/* Forcing low power mode: buck[234] */
+#define MAX77686_BUCK_LOWPOWER 0x2
+#define MAX77686_NORMAL 0x3
+
+#define MAX77686_OPMODE_SHIFT 6
+#define MAX77686_OPMODE_BUCK234_SHIFT 4
+#define MAX77686_OPMODE_MASK 0x3
+
+#define MAX77686_VSEL_MASK 0x3F
+#define MAX77686_DVS_VSEL_MASK 0xFF
+
+#define MAX77686_RAMP_RATE_MASK 0xC0
+
+#define MAX77686_REGULATORS MAX77686_REG_MAX
+#define MAX77686_LDOS 26
+
+enum max77686_ramp_rate {
+ RAMP_RATE_13P75MV,
+ RAMP_RATE_27P5MV,
+ RAMP_RATE_55MV,
+ RAMP_RATE_NO_CTRL, /* 100mV/us */
+};
+
+struct max77686_data {
+ DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
+
+ /* Array indexed by regulator id */
+ unsigned int opmode[MAX77686_REGULATORS];
+};
+
+static unsigned int max77686_get_opmode_shift(int id)
+{
+ switch (id) {
+ case MAX77686_BUCK1:
+ case MAX77686_BUCK5 ... MAX77686_BUCK9:
+ return 0;
+ case MAX77686_BUCK2 ... MAX77686_BUCK4:
+ return MAX77686_OPMODE_BUCK234_SHIFT;
+ default:
+ /* all LDOs */
+ return MAX77686_OPMODE_SHIFT;
+ }
+}
+
+/*
+ * When regulator is configured for GPIO control then it
+ * replaces "normal" mode. Any change from low power mode to normal
+ * should actually change to GPIO control.
+ * Map normal mode to proper value for such regulators.
+ */
+static unsigned int max77686_map_normal_mode(struct max77686_data *max77686,
+ int id)
+{
+ switch (id) {
+ case MAX77686_BUCK8:
+ case MAX77686_BUCK9:
+ case MAX77686_LDO20 ... MAX77686_LDO22:
+ if (test_bit(id, max77686->gpio_enabled))
+ return MAX77686_GPIO_CONTROL;
+ }
+
+ return MAX77686_NORMAL;
+}
+
+/* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
+static int max77686_set_suspend_disable(struct regulator_dev *rdev)
+{
+ unsigned int val, shift;
+ struct max77686_data *max77686 = rdev_get_drvdata(rdev);
+ int ret, id = rdev_get_id(rdev);
+
+ shift = max77686_get_opmode_shift(id);
+ val = MAX77686_OFF_PWRREQ;
+
+ ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask, val << shift);
+ if (ret)
+ return ret;
+
+ max77686->opmode[id] = val;
+ return 0;
+}
+
+/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
+static int max77686_set_suspend_mode(struct regulator_dev *rdev,
+ unsigned int mode)
+{
+ struct max77686_data *max77686 = rdev_get_drvdata(rdev);
+ unsigned int val;
+ int ret, id = rdev_get_id(rdev);
+
+ /* BUCK[5-9] doesn't support this feature */
+ if (id >= MAX77686_BUCK5)
+ return 0;
+
+ switch (mode) {
+ case REGULATOR_MODE_IDLE: /* ON in LP Mode */
+ val = MAX77686_LDO_LOWPOWER_PWRREQ;
+ break;
+ case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
+ val = max77686_map_normal_mode(max77686, id);
+ break;
+ default:
+ pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
+ rdev->desc->name, mode);
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask,
+ val << MAX77686_OPMODE_SHIFT);
+ if (ret)
+ return ret;
+
+ max77686->opmode[id] = val;
+ return 0;
+}
+
+/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
+static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
+ unsigned int mode)
+{
+ unsigned int val;
+ struct max77686_data *max77686 = rdev_get_drvdata(rdev);
+ int ret, id = rdev_get_id(rdev);
+
+ switch (mode) {
+ case REGULATOR_MODE_STANDBY: /* switch off */
+ val = MAX77686_OFF_PWRREQ;
+ break;
+ case REGULATOR_MODE_IDLE: /* ON in LP Mode */
+ val = MAX77686_LDO_LOWPOWER_PWRREQ;
+ break;
+ case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
+ val = max77686_map_normal_mode(max77686, id);
+ break;
+ default:
+ pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
+ rdev->desc->name, mode);
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask,
+ val << MAX77686_OPMODE_SHIFT);
+ if (ret)
+ return ret;
+
+ max77686->opmode[id] = val;
+ return 0;
+}
+
+static int max77686_enable(struct regulator_dev *rdev)
+{
+ struct max77686_data *max77686 = rdev_get_drvdata(rdev);
+ unsigned int shift;
+ int id = rdev_get_id(rdev);
+
+ shift = max77686_get_opmode_shift(id);
+
+ if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
+ max77686->opmode[id] = max77686_map_normal_mode(max77686, id);
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask,
+ max77686->opmode[id] << shift);
+}
+
+static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
+{
+ unsigned int ramp_value = RAMP_RATE_NO_CTRL;
+
+ switch (ramp_delay) {
+ case 1 ... 13750:
+ ramp_value = RAMP_RATE_13P75MV;
+ break;
+ case 13751 ... 27500:
+ ramp_value = RAMP_RATE_27P5MV;
+ break;
+ case 27501 ... 55000:
+ ramp_value = RAMP_RATE_55MV;
+ break;
+ case 55001 ... 100000:
+ break;
+ default:
+ pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
+ rdev->desc->name, ramp_delay);
+ }
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ MAX77686_RAMP_RATE_MASK, ramp_value << 6);
+}
+
+static int max77686_of_parse_cb(struct device_node *np,
+ const struct regulator_desc *desc,
+ struct regulator_config *config)
+{
+ struct max77686_data *max77686 = config->driver_data;
+
+ switch (desc->id) {
+ case MAX77686_BUCK8:
+ case MAX77686_BUCK9:
+ case MAX77686_LDO20 ... MAX77686_LDO22:
+ config->ena_gpio = of_get_named_gpio(np,
+ "maxim,ena-gpios", 0);
+ config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
+ config->ena_gpio_initialized = true;
+ break;
+ default:
+ return 0;
+ }
+
+ if (gpio_is_valid(config->ena_gpio)) {
+ set_bit(desc->id, max77686->gpio_enabled);
+
+ return regmap_update_bits(config->regmap, desc->enable_reg,
+ desc->enable_mask,
+ MAX77686_GPIO_CONTROL);
+ }
+
+ return 0;
+}
+
+static struct regulator_ops max77686_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77686_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_suspend_mode = max77686_set_suspend_mode,
+};
+
+static struct regulator_ops max77686_ldo_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77686_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_suspend_mode = max77686_ldo_set_suspend_mode,
+ .set_suspend_disable = max77686_set_suspend_disable,
+};
+
+static struct regulator_ops max77686_buck1_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77686_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_suspend_disable = max77686_set_suspend_disable,
+};
+
+static struct regulator_ops max77686_buck_dvs_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77686_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_ramp_delay = max77686_set_ramp_delay,
+ .set_suspend_disable = max77686_set_suspend_disable,
+};
+
+#define regulator_desc_ldo(num) { \
+ .name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
+ .of_parse_cb = max77686_of_parse_cb, \
+ .id = MAX77686_LDO##num, \
+ .ops = &max77686_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = MAX77686_LDO_MINUV, \
+ .uV_step = MAX77686_LDO_UVSTEP, \
+ .ramp_delay = MAX77686_RAMP_DELAY, \
+ .n_voltages = MAX77686_VSEL_MASK + 1, \
+ .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
+ .vsel_mask = MAX77686_VSEL_MASK, \
+ .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
+ .enable_mask = MAX77686_OPMODE_MASK \
+ << MAX77686_OPMODE_SHIFT, \
+}
+#define regulator_desc_lpm_ldo(num) { \
+ .name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
+ .id = MAX77686_LDO##num, \
+ .ops = &max77686_ldo_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = MAX77686_LDO_MINUV, \
+ .uV_step = MAX77686_LDO_UVSTEP, \
+ .ramp_delay = MAX77686_RAMP_DELAY, \
+ .n_voltages = MAX77686_VSEL_MASK + 1, \
+ .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
+ .vsel_mask = MAX77686_VSEL_MASK, \
+ .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
+ .enable_mask = MAX77686_OPMODE_MASK \
+ << MAX77686_OPMODE_SHIFT, \
+}
+#define regulator_desc_ldo_low(num) { \
+ .name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
+ .id = MAX77686_LDO##num, \
+ .ops = &max77686_ldo_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = MAX77686_LDO_LOW_MINUV, \
+ .uV_step = MAX77686_LDO_LOW_UVSTEP, \
+ .ramp_delay = MAX77686_RAMP_DELAY, \
+ .n_voltages = MAX77686_VSEL_MASK + 1, \
+ .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
+ .vsel_mask = MAX77686_VSEL_MASK, \
+ .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
+ .enable_mask = MAX77686_OPMODE_MASK \
+ << MAX77686_OPMODE_SHIFT, \
+}
+#define regulator_desc_ldo1_low(num) { \
+ .name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
+ .id = MAX77686_LDO##num, \
+ .ops = &max77686_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = MAX77686_LDO_LOW_MINUV, \
+ .uV_step = MAX77686_LDO_LOW_UVSTEP, \
+ .ramp_delay = MAX77686_RAMP_DELAY, \
+ .n_voltages = MAX77686_VSEL_MASK + 1, \
+ .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
+ .vsel_mask = MAX77686_VSEL_MASK, \
+ .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
+ .enable_mask = MAX77686_OPMODE_MASK \
+ << MAX77686_OPMODE_SHIFT, \
+}
+#define regulator_desc_buck(num) { \
+ .name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
+ .of_parse_cb = max77686_of_parse_cb, \
+ .id = MAX77686_BUCK##num, \
+ .ops = &max77686_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = MAX77686_BUCK_MINUV, \
+ .uV_step = MAX77686_BUCK_UVSTEP, \
+ .ramp_delay = MAX77686_RAMP_DELAY, \
+ .n_voltages = MAX77686_VSEL_MASK + 1, \
+ .vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
+ .vsel_mask = MAX77686_VSEL_MASK, \
+ .enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
+ .enable_mask = MAX77686_OPMODE_MASK, \
+}
+#define regulator_desc_buck1(num) { \
+ .name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
+ .id = MAX77686_BUCK##num, \
+ .ops = &max77686_buck1_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = MAX77686_BUCK_MINUV, \
+ .uV_step = MAX77686_BUCK_UVSTEP, \
+ .ramp_delay = MAX77686_RAMP_DELAY, \
+ .n_voltages = MAX77686_VSEL_MASK + 1, \
+ .vsel_reg = MAX77686_REG_BUCK1OUT, \
+ .vsel_mask = MAX77686_VSEL_MASK, \
+ .enable_reg = MAX77686_REG_BUCK1CTRL, \
+ .enable_mask = MAX77686_OPMODE_MASK, \
+}
+#define regulator_desc_buck_dvs(num) { \
+ .name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
+ .regulators_node = of_match_ptr("voltage-regulators"), \
+ .id = MAX77686_BUCK##num, \
+ .ops = &max77686_buck_dvs_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = MAX77686_DVS_MINUV, \
+ .uV_step = MAX77686_DVS_UVSTEP, \
+ .ramp_delay = MAX77686_DVS_RAMP_DELAY, \
+ .n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
+ .vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
+ .vsel_mask = MAX77686_DVS_VSEL_MASK, \
+ .enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
+ .enable_mask = MAX77686_OPMODE_MASK \
+ << MAX77686_OPMODE_BUCK234_SHIFT, \
+}
+
+static const struct regulator_desc regulators[] = {
+ regulator_desc_ldo1_low(1),
+ regulator_desc_ldo_low(2),
+ regulator_desc_ldo(3),
+ regulator_desc_ldo(4),
+ regulator_desc_ldo(5),
+ regulator_desc_ldo_low(6),
+ regulator_desc_ldo_low(7),
+ regulator_desc_ldo_low(8),
+ regulator_desc_ldo(9),
+ regulator_desc_lpm_ldo(10),
+ regulator_desc_lpm_ldo(11),
+ regulator_desc_lpm_ldo(12),
+ regulator_desc_ldo(13),
+ regulator_desc_lpm_ldo(14),
+ regulator_desc_ldo_low(15),
+ regulator_desc_lpm_ldo(16),
+ regulator_desc_ldo(17),
+ regulator_desc_ldo(18),
+ regulator_desc_ldo(19),
+ regulator_desc_ldo(20),
+ regulator_desc_ldo(21),
+ regulator_desc_ldo(22),
+ regulator_desc_ldo(23),
+ regulator_desc_ldo(24),
+ regulator_desc_ldo(25),
+ regulator_desc_ldo(26),
+ regulator_desc_buck1(1),
+ regulator_desc_buck_dvs(2),
+ regulator_desc_buck_dvs(3),
+ regulator_desc_buck_dvs(4),
+ regulator_desc_buck(5),
+ regulator_desc_buck(6),
+ regulator_desc_buck(7),
+ regulator_desc_buck(8),
+ regulator_desc_buck(9),
+};
+
+static int max77686_pmic_probe(struct platform_device *pdev)
+{
+ struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct max77686_data *max77686;
+ int i;
+ struct regulator_config config = { };
+
+ dev_dbg(&pdev->dev, "%s\n", __func__);
+
+ max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
+ GFP_KERNEL);
+ if (!max77686)
+ return -ENOMEM;
+
+ config.dev = iodev->dev;
+ config.regmap = iodev->regmap;
+ config.driver_data = max77686;
+ platform_set_drvdata(pdev, max77686);
+
+ for (i = 0; i < MAX77686_REGULATORS; i++) {
+ struct regulator_dev *rdev;
+ int id = regulators[i].id;
+
+ max77686->opmode[id] = MAX77686_NORMAL;
+ rdev = devm_regulator_register(&pdev->dev,
+ ®ulators[i], &config);
+ if (IS_ERR(rdev)) {
+ int ret = PTR_ERR(rdev);
+ dev_err(&pdev->dev,
+ "regulator init failed for %d: %d\n", i, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id max77686_pmic_id[] = {
+ {"max77686-pmic", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
+
+static struct platform_driver max77686_pmic_driver = {
+ .driver = {
+ .name = "max77686-pmic",
+ },
+ .probe = max77686_pmic_probe,
+ .id_table = max77686_pmic_id,
+};
+
+static int __init max77686_pmic_init(void)
+{
+ return platform_driver_register(&max77686_pmic_driver);
+}
+subsys_initcall(max77686_pmic_init);
+
+static void __exit max77686_pmic_cleanup(void)
+{
+ platform_driver_unregister(&max77686_pmic_driver);
+}
+module_exit(max77686_pmic_cleanup);
+
+MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
+MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
+MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * max77686.c - Regulator driver for the Maxim 77686
- *
- * Copyright (C) 2012 Samsung Electronics
- * Chiwoong Byun <woong.byun@samsung.com>
- * Jonghwa Lee <jonghwa3.lee@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * This driver is based on max8997.c
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
-#include <linux/slab.h>
-#include <linux/platform_device.h>
-#include <linux/regulator/driver.h>
-#include <linux/regulator/machine.h>
-#include <linux/regulator/of_regulator.h>
-#include <linux/mfd/max77686.h>
-#include <linux/mfd/max77686-private.h>
-
-#define MAX77686_LDO_MINUV 800000
-#define MAX77686_LDO_UVSTEP 50000
-#define MAX77686_LDO_LOW_MINUV 800000
-#define MAX77686_LDO_LOW_UVSTEP 25000
-#define MAX77686_BUCK_MINUV 750000
-#define MAX77686_BUCK_UVSTEP 50000
-#define MAX77686_RAMP_DELAY 100000 /* uV/us */
-#define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */
-#define MAX77686_DVS_MINUV 600000
-#define MAX77686_DVS_UVSTEP 12500
-
-/*
- * Value for configuring buck[89] and LDO{20,21,22} as GPIO control.
- * It is the same as 'off' for other regulators.
- */
-#define MAX77686_GPIO_CONTROL 0x0
-/*
- * Values used for configuring LDOs and bucks.
- * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
- */
-#define MAX77686_LDO_LOWPOWER 0x1
-/*
- * On/off controlled by PWRREQ:
- * - LDO2, 6-8, 10-12, 14-16
- * - buck[1234]
- */
-#define MAX77686_OFF_PWRREQ 0x1
-/* Low power mode controlled by PWRREQ: All LDOs */
-#define MAX77686_LDO_LOWPOWER_PWRREQ 0x2
-/* Forcing low power mode: buck[234] */
-#define MAX77686_BUCK_LOWPOWER 0x2
-#define MAX77686_NORMAL 0x3
-
-#define MAX77686_OPMODE_SHIFT 6
-#define MAX77686_OPMODE_BUCK234_SHIFT 4
-#define MAX77686_OPMODE_MASK 0x3
-
-#define MAX77686_VSEL_MASK 0x3F
-#define MAX77686_DVS_VSEL_MASK 0xFF
-
-#define MAX77686_RAMP_RATE_MASK 0xC0
-
-#define MAX77686_REGULATORS MAX77686_REG_MAX
-#define MAX77686_LDOS 26
-
-enum max77686_ramp_rate {
- RAMP_RATE_13P75MV,
- RAMP_RATE_27P5MV,
- RAMP_RATE_55MV,
- RAMP_RATE_NO_CTRL, /* 100mV/us */
-};
-
-struct max77686_data {
- DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
-
- /* Array indexed by regulator id */
- unsigned int opmode[MAX77686_REGULATORS];
-};
-
-static unsigned int max77686_get_opmode_shift(int id)
-{
- switch (id) {
- case MAX77686_BUCK1:
- case MAX77686_BUCK5 ... MAX77686_BUCK9:
- return 0;
- case MAX77686_BUCK2 ... MAX77686_BUCK4:
- return MAX77686_OPMODE_BUCK234_SHIFT;
- default:
- /* all LDOs */
- return MAX77686_OPMODE_SHIFT;
- }
-}
-
-/*
- * When regulator is configured for GPIO control then it
- * replaces "normal" mode. Any change from low power mode to normal
- * should actually change to GPIO control.
- * Map normal mode to proper value for such regulators.
- */
-static unsigned int max77686_map_normal_mode(struct max77686_data *max77686,
- int id)
-{
- switch (id) {
- case MAX77686_BUCK8:
- case MAX77686_BUCK9:
- case MAX77686_LDO20 ... MAX77686_LDO22:
- if (test_bit(id, max77686->gpio_enabled))
- return MAX77686_GPIO_CONTROL;
- }
-
- return MAX77686_NORMAL;
-}
-
-/* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
-static int max77686_set_suspend_disable(struct regulator_dev *rdev)
-{
- unsigned int val, shift;
- struct max77686_data *max77686 = rdev_get_drvdata(rdev);
- int ret, id = rdev_get_id(rdev);
-
- shift = max77686_get_opmode_shift(id);
- val = MAX77686_OFF_PWRREQ;
-
- ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val << shift);
- if (ret)
- return ret;
-
- max77686->opmode[id] = val;
- return 0;
-}
-
-/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
-static int max77686_set_suspend_mode(struct regulator_dev *rdev,
- unsigned int mode)
-{
- struct max77686_data *max77686 = rdev_get_drvdata(rdev);
- unsigned int val;
- int ret, id = rdev_get_id(rdev);
-
- /* BUCK[5-9] doesn't support this feature */
- if (id >= MAX77686_BUCK5)
- return 0;
-
- switch (mode) {
- case REGULATOR_MODE_IDLE: /* ON in LP Mode */
- val = MAX77686_LDO_LOWPOWER_PWRREQ;
- break;
- case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
- val = max77686_map_normal_mode(max77686, id);
- break;
- default:
- pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
- rdev->desc->name, mode);
- return -EINVAL;
- }
-
- ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask,
- val << MAX77686_OPMODE_SHIFT);
- if (ret)
- return ret;
-
- max77686->opmode[id] = val;
- return 0;
-}
-
-/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
-static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
- unsigned int mode)
-{
- unsigned int val;
- struct max77686_data *max77686 = rdev_get_drvdata(rdev);
- int ret, id = rdev_get_id(rdev);
-
- switch (mode) {
- case REGULATOR_MODE_STANDBY: /* switch off */
- val = MAX77686_OFF_PWRREQ;
- break;
- case REGULATOR_MODE_IDLE: /* ON in LP Mode */
- val = MAX77686_LDO_LOWPOWER_PWRREQ;
- break;
- case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */
- val = max77686_map_normal_mode(max77686, id);
- break;
- default:
- pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
- rdev->desc->name, mode);
- return -EINVAL;
- }
-
- ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask,
- val << MAX77686_OPMODE_SHIFT);
- if (ret)
- return ret;
-
- max77686->opmode[id] = val;
- return 0;
-}
-
-static int max77686_enable(struct regulator_dev *rdev)
-{
- struct max77686_data *max77686 = rdev_get_drvdata(rdev);
- unsigned int shift;
- int id = rdev_get_id(rdev);
-
- shift = max77686_get_opmode_shift(id);
-
- if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
- max77686->opmode[id] = max77686_map_normal_mode(max77686, id);
-
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask,
- max77686->opmode[id] << shift);
-}
-
-static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
-{
- unsigned int ramp_value = RAMP_RATE_NO_CTRL;
-
- switch (ramp_delay) {
- case 1 ... 13750:
- ramp_value = RAMP_RATE_13P75MV;
- break;
- case 13751 ... 27500:
- ramp_value = RAMP_RATE_27P5MV;
- break;
- case 27501 ... 55000:
- ramp_value = RAMP_RATE_55MV;
- break;
- case 55001 ... 100000:
- break;
- default:
- pr_warn("%s: ramp_delay: %d not supported, setting 100000\n",
- rdev->desc->name, ramp_delay);
- }
-
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- MAX77686_RAMP_RATE_MASK, ramp_value << 6);
-}
-
-static int max77686_of_parse_cb(struct device_node *np,
- const struct regulator_desc *desc,
- struct regulator_config *config)
-{
- struct max77686_data *max77686 = config->driver_data;
-
- switch (desc->id) {
- case MAX77686_BUCK8:
- case MAX77686_BUCK9:
- case MAX77686_LDO20 ... MAX77686_LDO22:
- config->ena_gpio = of_get_named_gpio(np,
- "maxim,ena-gpios", 0);
- config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
- config->ena_gpio_initialized = true;
- break;
- default:
- return 0;
- }
-
- if (gpio_is_valid(config->ena_gpio)) {
- set_bit(desc->id, max77686->gpio_enabled);
-
- return regmap_update_bits(config->regmap, desc->enable_reg,
- desc->enable_mask,
- MAX77686_GPIO_CONTROL);
- }
-
- return 0;
-}
-
-static struct regulator_ops max77686_ops = {
- .list_voltage = regulator_list_voltage_linear,
- .map_voltage = regulator_map_voltage_linear,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = max77686_enable,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_suspend_mode = max77686_set_suspend_mode,
-};
-
-static struct regulator_ops max77686_ldo_ops = {
- .list_voltage = regulator_list_voltage_linear,
- .map_voltage = regulator_map_voltage_linear,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = max77686_enable,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_suspend_mode = max77686_ldo_set_suspend_mode,
- .set_suspend_disable = max77686_set_suspend_disable,
-};
-
-static struct regulator_ops max77686_buck1_ops = {
- .list_voltage = regulator_list_voltage_linear,
- .map_voltage = regulator_map_voltage_linear,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = max77686_enable,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_suspend_disable = max77686_set_suspend_disable,
-};
-
-static struct regulator_ops max77686_buck_dvs_ops = {
- .list_voltage = regulator_list_voltage_linear,
- .map_voltage = regulator_map_voltage_linear,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = max77686_enable,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_ramp_delay = max77686_set_ramp_delay,
- .set_suspend_disable = max77686_set_suspend_disable,
-};
-
-#define regulator_desc_ldo(num) { \
- .name = "LDO"#num, \
- .of_match = of_match_ptr("LDO"#num), \
- .regulators_node = of_match_ptr("voltage-regulators"), \
- .of_parse_cb = max77686_of_parse_cb, \
- .id = MAX77686_LDO##num, \
- .ops = &max77686_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = MAX77686_LDO_MINUV, \
- .uV_step = MAX77686_LDO_UVSTEP, \
- .ramp_delay = MAX77686_RAMP_DELAY, \
- .n_voltages = MAX77686_VSEL_MASK + 1, \
- .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
- .vsel_mask = MAX77686_VSEL_MASK, \
- .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
- .enable_mask = MAX77686_OPMODE_MASK \
- << MAX77686_OPMODE_SHIFT, \
-}
-#define regulator_desc_lpm_ldo(num) { \
- .name = "LDO"#num, \
- .of_match = of_match_ptr("LDO"#num), \
- .regulators_node = of_match_ptr("voltage-regulators"), \
- .id = MAX77686_LDO##num, \
- .ops = &max77686_ldo_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = MAX77686_LDO_MINUV, \
- .uV_step = MAX77686_LDO_UVSTEP, \
- .ramp_delay = MAX77686_RAMP_DELAY, \
- .n_voltages = MAX77686_VSEL_MASK + 1, \
- .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
- .vsel_mask = MAX77686_VSEL_MASK, \
- .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
- .enable_mask = MAX77686_OPMODE_MASK \
- << MAX77686_OPMODE_SHIFT, \
-}
-#define regulator_desc_ldo_low(num) { \
- .name = "LDO"#num, \
- .of_match = of_match_ptr("LDO"#num), \
- .regulators_node = of_match_ptr("voltage-regulators"), \
- .id = MAX77686_LDO##num, \
- .ops = &max77686_ldo_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = MAX77686_LDO_LOW_MINUV, \
- .uV_step = MAX77686_LDO_LOW_UVSTEP, \
- .ramp_delay = MAX77686_RAMP_DELAY, \
- .n_voltages = MAX77686_VSEL_MASK + 1, \
- .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
- .vsel_mask = MAX77686_VSEL_MASK, \
- .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
- .enable_mask = MAX77686_OPMODE_MASK \
- << MAX77686_OPMODE_SHIFT, \
-}
-#define regulator_desc_ldo1_low(num) { \
- .name = "LDO"#num, \
- .of_match = of_match_ptr("LDO"#num), \
- .regulators_node = of_match_ptr("voltage-regulators"), \
- .id = MAX77686_LDO##num, \
- .ops = &max77686_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = MAX77686_LDO_LOW_MINUV, \
- .uV_step = MAX77686_LDO_LOW_UVSTEP, \
- .ramp_delay = MAX77686_RAMP_DELAY, \
- .n_voltages = MAX77686_VSEL_MASK + 1, \
- .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
- .vsel_mask = MAX77686_VSEL_MASK, \
- .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \
- .enable_mask = MAX77686_OPMODE_MASK \
- << MAX77686_OPMODE_SHIFT, \
-}
-#define regulator_desc_buck(num) { \
- .name = "BUCK"#num, \
- .of_match = of_match_ptr("BUCK"#num), \
- .regulators_node = of_match_ptr("voltage-regulators"), \
- .of_parse_cb = max77686_of_parse_cb, \
- .id = MAX77686_BUCK##num, \
- .ops = &max77686_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = MAX77686_BUCK_MINUV, \
- .uV_step = MAX77686_BUCK_UVSTEP, \
- .ramp_delay = MAX77686_RAMP_DELAY, \
- .n_voltages = MAX77686_VSEL_MASK + 1, \
- .vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \
- .vsel_mask = MAX77686_VSEL_MASK, \
- .enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \
- .enable_mask = MAX77686_OPMODE_MASK, \
-}
-#define regulator_desc_buck1(num) { \
- .name = "BUCK"#num, \
- .of_match = of_match_ptr("BUCK"#num), \
- .regulators_node = of_match_ptr("voltage-regulators"), \
- .id = MAX77686_BUCK##num, \
- .ops = &max77686_buck1_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = MAX77686_BUCK_MINUV, \
- .uV_step = MAX77686_BUCK_UVSTEP, \
- .ramp_delay = MAX77686_RAMP_DELAY, \
- .n_voltages = MAX77686_VSEL_MASK + 1, \
- .vsel_reg = MAX77686_REG_BUCK1OUT, \
- .vsel_mask = MAX77686_VSEL_MASK, \
- .enable_reg = MAX77686_REG_BUCK1CTRL, \
- .enable_mask = MAX77686_OPMODE_MASK, \
-}
-#define regulator_desc_buck_dvs(num) { \
- .name = "BUCK"#num, \
- .of_match = of_match_ptr("BUCK"#num), \
- .regulators_node = of_match_ptr("voltage-regulators"), \
- .id = MAX77686_BUCK##num, \
- .ops = &max77686_buck_dvs_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = MAX77686_DVS_MINUV, \
- .uV_step = MAX77686_DVS_UVSTEP, \
- .ramp_delay = MAX77686_DVS_RAMP_DELAY, \
- .n_voltages = MAX77686_DVS_VSEL_MASK + 1, \
- .vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \
- .vsel_mask = MAX77686_DVS_VSEL_MASK, \
- .enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \
- .enable_mask = MAX77686_OPMODE_MASK \
- << MAX77686_OPMODE_BUCK234_SHIFT, \
-}
-
-static const struct regulator_desc regulators[] = {
- regulator_desc_ldo1_low(1),
- regulator_desc_ldo_low(2),
- regulator_desc_ldo(3),
- regulator_desc_ldo(4),
- regulator_desc_ldo(5),
- regulator_desc_ldo_low(6),
- regulator_desc_ldo_low(7),
- regulator_desc_ldo_low(8),
- regulator_desc_ldo(9),
- regulator_desc_lpm_ldo(10),
- regulator_desc_lpm_ldo(11),
- regulator_desc_lpm_ldo(12),
- regulator_desc_ldo(13),
- regulator_desc_lpm_ldo(14),
- regulator_desc_ldo_low(15),
- regulator_desc_lpm_ldo(16),
- regulator_desc_ldo(17),
- regulator_desc_ldo(18),
- regulator_desc_ldo(19),
- regulator_desc_ldo(20),
- regulator_desc_ldo(21),
- regulator_desc_ldo(22),
- regulator_desc_ldo(23),
- regulator_desc_ldo(24),
- regulator_desc_ldo(25),
- regulator_desc_ldo(26),
- regulator_desc_buck1(1),
- regulator_desc_buck_dvs(2),
- regulator_desc_buck_dvs(3),
- regulator_desc_buck_dvs(4),
- regulator_desc_buck(5),
- regulator_desc_buck(6),
- regulator_desc_buck(7),
- regulator_desc_buck(8),
- regulator_desc_buck(9),
-};
-
-static int max77686_pmic_probe(struct platform_device *pdev)
-{
- struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
- struct max77686_data *max77686;
- int i;
- struct regulator_config config = { };
-
- dev_dbg(&pdev->dev, "%s\n", __func__);
-
- max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
- GFP_KERNEL);
- if (!max77686)
- return -ENOMEM;
-
- config.dev = iodev->dev;
- config.regmap = iodev->regmap;
- config.driver_data = max77686;
- platform_set_drvdata(pdev, max77686);
-
- for (i = 0; i < MAX77686_REGULATORS; i++) {
- struct regulator_dev *rdev;
- int id = regulators[i].id;
-
- max77686->opmode[id] = MAX77686_NORMAL;
- rdev = devm_regulator_register(&pdev->dev,
- ®ulators[i], &config);
- if (IS_ERR(rdev)) {
- int ret = PTR_ERR(rdev);
- dev_err(&pdev->dev,
- "regulator init failed for %d: %d\n", i, ret);
- return ret;
- }
- }
-
- return 0;
-}
-
-static const struct platform_device_id max77686_pmic_id[] = {
- {"max77686-pmic", 0},
- { },
-};
-MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
-
-static struct platform_driver max77686_pmic_driver = {
- .driver = {
- .name = "max77686-pmic",
- },
- .probe = max77686_pmic_probe,
- .id_table = max77686_pmic_id,
-};
-
-static int __init max77686_pmic_init(void)
-{
- return platform_driver_register(&max77686_pmic_driver);
-}
-subsys_initcall(max77686_pmic_init);
-
-static void __exit max77686_pmic_cleanup(void)
-{
- platform_driver_unregister(&max77686_pmic_driver);
-}
-module_exit(max77686_pmic_cleanup);
-
-MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
-MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
-MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * max77802.c - Regulator driver for the Maxim 77802
+ *
+ * Copyright (C) 2013-2014 Google, Inc
+ * Simon Glass <sjg@chromium.org>
+ *
+ * Copyright (C) 2012 Samsung Electronics
+ * Chiwoong Byun <woong.byun@smasung.com>
+ * Jonghwa Lee <jonghwa3.lee@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * This driver is based on max8997.c
+ */
+
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/max77686.h>
+#include <linux/mfd/max77686-private.h>
+#include <dt-bindings/regulator/maxim,max77802.h>
+
+/* Default ramp delay in case it is not manually set */
+#define MAX77802_RAMP_DELAY 100000 /* uV/us */
+
+#define MAX77802_OPMODE_SHIFT_LDO 6
+#define MAX77802_OPMODE_BUCK234_SHIFT 4
+#define MAX77802_OPMODE_MASK 0x3
+
+#define MAX77802_VSEL_MASK 0x3F
+#define MAX77802_DVS_VSEL_MASK 0xFF
+
+#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0
+#define MAX77802_RAMP_RATE_SHIFT_2BIT 6
+#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0
+#define MAX77802_RAMP_RATE_SHIFT_4BIT 4
+
+#define MAX77802_STATUS_OFF 0x0
+#define MAX77802_OFF_PWRREQ 0x1
+#define MAX77802_LP_PWRREQ 0x2
+
+/* MAX77802 has two register formats: 2-bit and 4-bit */
+static const unsigned int ramp_table_77802_2bit[] = {
+ 12500,
+ 25000,
+ 50000,
+ 100000,
+};
+
+static unsigned int ramp_table_77802_4bit[] = {
+ 1000, 2000, 3030, 4000,
+ 5000, 5880, 7140, 8330,
+ 9090, 10000, 11110, 12500,
+ 16670, 25000, 50000, 100000,
+};
+
+struct max77802_regulator_prv {
+ /* Array indexed by regulator id */
+ unsigned int opmode[MAX77802_REG_MAX];
+};
+
+static inline unsigned int max77802_map_mode(unsigned int mode)
+{
+ return mode == MAX77802_OPMODE_NORMAL ?
+ REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
+}
+
+static int max77802_get_opmode_shift(int id)
+{
+ if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
+ id <= MAX77802_BUCK10))
+ return 0;
+
+ if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
+ return MAX77802_OPMODE_BUCK234_SHIFT;
+
+ if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
+ return MAX77802_OPMODE_SHIFT_LDO;
+
+ return -EINVAL;
+}
+
+/**
+ * max77802_set_suspend_disable - Disable the regulator during system suspend
+ * @rdev: regulator to mark as disabled
+ *
+ * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.
+ * Configure the regulator so the PMIC will turn it OFF during system suspend.
+ */
+static int max77802_set_suspend_disable(struct regulator_dev *rdev)
+{
+ unsigned int val = MAX77802_OFF_PWRREQ;
+ struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ int shift = max77802_get_opmode_shift(id);
+
+ max77802->opmode[id] = val;
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask, val << shift);
+}
+
+/*
+ * Some LDOs support Low Power Mode while the system is running.
+ *
+ * LDOs 1, 3, 20, 21.
+ */
+static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+ struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ unsigned int val;
+ int shift = max77802_get_opmode_shift(id);
+
+ switch (mode) {
+ case REGULATOR_MODE_STANDBY:
+ val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */
+ break;
+ case REGULATOR_MODE_NORMAL:
+ val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */
+ break;
+ default:
+ dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
+ rdev->desc->name, mode);
+ return -EINVAL;
+ }
+
+ max77802->opmode[id] = val;
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask, val << shift);
+}
+
+static unsigned max77802_get_mode(struct regulator_dev *rdev)
+{
+ struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+
+ return max77802_map_mode(max77802->opmode[id]);
+}
+
+/**
+ * max77802_set_suspend_mode - set regulator opmode when the system is suspended
+ * @rdev: regulator to change mode
+ * @mode: operating mode to be set
+ *
+ * Will set the operating mode for the regulators during system suspend.
+ * This function is valid for the three different enable control logics:
+ *
+ * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
+ * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
+ * Enable Control Logic3 by PWRREQ (LDO 3)
+ *
+ * If setting the regulator mode fails, the function only warns but does
+ * not return an error code to avoid the regulator core to stop setting
+ * the operating mode for the remaining regulators.
+ */
+static int max77802_set_suspend_mode(struct regulator_dev *rdev,
+ unsigned int mode)
+{
+ struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ unsigned int val;
+ int shift = max77802_get_opmode_shift(id);
+
+ /*
+ * If the regulator has been disabled for suspend
+ * then is invalid to try setting a suspend mode.
+ */
+ if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
+ dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
+ rdev->desc->name, mode);
+ return 0;
+ }
+
+ switch (mode) {
+ case REGULATOR_MODE_STANDBY:
+ /*
+ * If the regulator opmode is normal then enable
+ * ON in Low Power Mode by PWRREQ. If the mode is
+ * already Low Power then no action is required.
+ */
+ if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
+ val = MAX77802_LP_PWRREQ;
+ else
+ return 0;
+ break;
+ case REGULATOR_MODE_NORMAL:
+ /*
+ * If the regulator operating mode is Low Power then
+ * normal is not a valid opmode in suspend. If the
+ * mode is already normal then no action is required.
+ */
+ if (max77802->opmode[id] == MAX77802_OPMODE_LP)
+ dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
+ rdev->desc->name, mode);
+ return 0;
+ default:
+ dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
+ rdev->desc->name, mode);
+ return -EINVAL;
+ }
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask, val << shift);
+}
+
+static int max77802_enable(struct regulator_dev *rdev)
+{
+ struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+ int id = rdev_get_id(rdev);
+ int shift = max77802_get_opmode_shift(id);
+
+ if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
+ max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask,
+ max77802->opmode[id] << shift);
+}
+
+static int max77802_find_ramp_value(struct regulator_dev *rdev,
+ const unsigned int limits[], int size,
+ unsigned int ramp_delay)
+{
+ int i;
+
+ for (i = 0; i < size; i++) {
+ if (ramp_delay <= limits[i])
+ return i;
+ }
+
+ /* Use maximum value for no ramp control */
+ dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n",
+ rdev->desc->name, ramp_delay);
+ return size - 1;
+}
+
+/* Used for BUCKs 2-4 */
+static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev,
+ int ramp_delay)
+{
+ int id = rdev_get_id(rdev);
+ unsigned int ramp_value;
+
+ if (id > MAX77802_BUCK4) {
+ dev_warn(&rdev->dev,
+ "%s: regulator: ramp delay not supported\n",
+ rdev->desc->name);
+ return -EINVAL;
+ }
+ ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit,
+ ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay);
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ MAX77802_RAMP_RATE_MASK_2BIT,
+ ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT);
+}
+
+/* For BUCK1, 6 */
+static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev,
+ int ramp_delay)
+{
+ unsigned int ramp_value;
+
+ ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit,
+ ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay);
+
+ return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ MAX77802_RAMP_RATE_MASK_4BIT,
+ ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT);
+}
+
+/*
+ * LDOs 2, 4-19, 22-35
+ */
+static struct regulator_ops max77802_ldo_ops_logic1 = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77802_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_suspend_disable = max77802_set_suspend_disable,
+ .set_suspend_mode = max77802_set_suspend_mode,
+};
+
+/*
+ * LDOs 1, 20, 21, 3
+ */
+static struct regulator_ops max77802_ldo_ops_logic2 = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77802_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_mode = max77802_set_mode,
+ .get_mode = max77802_get_mode,
+ .set_suspend_mode = max77802_set_suspend_mode,
+};
+
+/* BUCKS 1, 6 */
+static struct regulator_ops max77802_buck_16_dvs_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77802_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_ramp_delay = max77802_set_ramp_delay_4bit,
+ .set_suspend_disable = max77802_set_suspend_disable,
+};
+
+/* BUCKs 2-4 */
+static struct regulator_ops max77802_buck_234_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77802_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_ramp_delay = max77802_set_ramp_delay_2bit,
+ .set_suspend_disable = max77802_set_suspend_disable,
+ .set_suspend_mode = max77802_set_suspend_mode,
+};
+
+/* BUCKs 5, 7-10 */
+static struct regulator_ops max77802_buck_dvs_ops = {
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = max77802_enable,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
+ .set_ramp_delay = max77802_set_ramp_delay_2bit,
+ .set_suspend_disable = max77802_set_suspend_disable,
+};
+
+/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
+#define regulator_77802_desc_p_ldo(num, supply, log) { \
+ .name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .id = MAX77802_LDO##num, \
+ .supply_name = "inl"#supply, \
+ .ops = &max77802_ldo_ops_logic##log, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 800000, \
+ .uV_step = 50000, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 1 << 6, \
+ .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
+ .vsel_mask = MAX77802_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
+ .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
+ .of_map_mode = max77802_map_mode, \
+}
+
+/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
+#define regulator_77802_desc_n_ldo(num, supply, log) { \
+ .name = "LDO"#num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .id = MAX77802_LDO##num, \
+ .supply_name = "inl"#supply, \
+ .ops = &max77802_ldo_ops_logic##log, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 800000, \
+ .uV_step = 25000, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 1 << 6, \
+ .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
+ .vsel_mask = MAX77802_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
+ .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
+ .of_map_mode = max77802_map_mode, \
+}
+
+/* BUCKs 1, 6 */
+#define regulator_77802_desc_16_buck(num) { \
+ .name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .id = MAX77802_BUCK##num, \
+ .supply_name = "inb"#num, \
+ .ops = &max77802_buck_16_dvs_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 612500, \
+ .uV_step = 6250, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 1 << 8, \
+ .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
+ .vsel_mask = MAX77802_DVS_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \
+ .enable_mask = MAX77802_OPMODE_MASK, \
+ .of_map_mode = max77802_map_mode, \
+}
+
+/* BUCKS 2-4 */
+#define regulator_77802_desc_234_buck(num) { \
+ .name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .id = MAX77802_BUCK##num, \
+ .supply_name = "inb"#num, \
+ .ops = &max77802_buck_234_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 600000, \
+ .uV_step = 6250, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 0x91, \
+ .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
+ .vsel_mask = MAX77802_DVS_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
+ .enable_mask = MAX77802_OPMODE_MASK << \
+ MAX77802_OPMODE_BUCK234_SHIFT, \
+ .of_map_mode = max77802_map_mode, \
+}
+
+/* BUCK 5 */
+#define regulator_77802_desc_buck5(num) { \
+ .name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .id = MAX77802_BUCK##num, \
+ .supply_name = "inb"#num, \
+ .ops = &max77802_buck_dvs_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 750000, \
+ .uV_step = 50000, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 1 << 6, \
+ .vsel_reg = MAX77802_REG_BUCK5OUT, \
+ .vsel_mask = MAX77802_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_BUCK5CTRL, \
+ .enable_mask = MAX77802_OPMODE_MASK, \
+ .of_map_mode = max77802_map_mode, \
+}
+
+/* BUCKs 7-10 */
+#define regulator_77802_desc_buck7_10(num) { \
+ .name = "BUCK"#num, \
+ .of_match = of_match_ptr("BUCK"#num), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .id = MAX77802_BUCK##num, \
+ .supply_name = "inb"#num, \
+ .ops = &max77802_buck_dvs_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .min_uV = 750000, \
+ .uV_step = 50000, \
+ .ramp_delay = MAX77802_RAMP_DELAY, \
+ .n_voltages = 1 << 6, \
+ .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \
+ .vsel_mask = MAX77802_VSEL_MASK, \
+ .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \
+ .enable_mask = MAX77802_OPMODE_MASK, \
+ .of_map_mode = max77802_map_mode, \
+}
+
+static const struct regulator_desc regulators[] = {
+ regulator_77802_desc_16_buck(1),
+ regulator_77802_desc_234_buck(2),
+ regulator_77802_desc_234_buck(3),
+ regulator_77802_desc_234_buck(4),
+ regulator_77802_desc_buck5(5),
+ regulator_77802_desc_16_buck(6),
+ regulator_77802_desc_buck7_10(7),
+ regulator_77802_desc_buck7_10(8),
+ regulator_77802_desc_buck7_10(9),
+ regulator_77802_desc_buck7_10(10),
+ regulator_77802_desc_n_ldo(1, 10, 2),
+ regulator_77802_desc_n_ldo(2, 10, 1),
+ regulator_77802_desc_p_ldo(3, 3, 2),
+ regulator_77802_desc_p_ldo(4, 6, 1),
+ regulator_77802_desc_p_ldo(5, 3, 1),
+ regulator_77802_desc_p_ldo(6, 3, 1),
+ regulator_77802_desc_p_ldo(7, 3, 1),
+ regulator_77802_desc_n_ldo(8, 1, 1),
+ regulator_77802_desc_p_ldo(9, 5, 1),
+ regulator_77802_desc_p_ldo(10, 4, 1),
+ regulator_77802_desc_p_ldo(11, 4, 1),
+ regulator_77802_desc_p_ldo(12, 9, 1),
+ regulator_77802_desc_p_ldo(13, 4, 1),
+ regulator_77802_desc_p_ldo(14, 4, 1),
+ regulator_77802_desc_n_ldo(15, 1, 1),
+ regulator_77802_desc_n_ldo(17, 2, 1),
+ regulator_77802_desc_p_ldo(18, 7, 1),
+ regulator_77802_desc_p_ldo(19, 5, 1),
+ regulator_77802_desc_p_ldo(20, 7, 2),
+ regulator_77802_desc_p_ldo(21, 6, 2),
+ regulator_77802_desc_p_ldo(23, 9, 1),
+ regulator_77802_desc_p_ldo(24, 6, 1),
+ regulator_77802_desc_p_ldo(25, 9, 1),
+ regulator_77802_desc_p_ldo(26, 9, 1),
+ regulator_77802_desc_n_ldo(27, 2, 1),
+ regulator_77802_desc_p_ldo(28, 7, 1),
+ regulator_77802_desc_p_ldo(29, 7, 1),
+ regulator_77802_desc_n_ldo(30, 2, 1),
+ regulator_77802_desc_p_ldo(32, 9, 1),
+ regulator_77802_desc_p_ldo(33, 6, 1),
+ regulator_77802_desc_p_ldo(34, 9, 1),
+ regulator_77802_desc_n_ldo(35, 2, 1),
+};
+
+static int max77802_pmic_probe(struct platform_device *pdev)
+{
+ struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+ struct max77802_regulator_prv *max77802;
+ int i, val;
+ struct regulator_config config = { };
+
+ max77802 = devm_kzalloc(&pdev->dev,
+ sizeof(struct max77802_regulator_prv),
+ GFP_KERNEL);
+ if (!max77802)
+ return -ENOMEM;
+
+ config.dev = iodev->dev;
+ config.regmap = iodev->regmap;
+ config.driver_data = max77802;
+ platform_set_drvdata(pdev, max77802);
+
+ for (i = 0; i < MAX77802_REG_MAX; i++) {
+ struct regulator_dev *rdev;
+ int id = regulators[i].id;
+ int shift = max77802_get_opmode_shift(id);
+ int ret;
+
+ ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
+ if (ret < 0) {
+ dev_warn(&pdev->dev,
+ "cannot read current mode for %d\n", i);
+ val = MAX77802_OPMODE_NORMAL;
+ } else {
+ val = val >> shift & MAX77802_OPMODE_MASK;
+ }
+
+ /*
+ * If the regulator is disabled and the system warm rebooted,
+ * the hardware reports OFF as the regulator operating mode.
+ * Default to operating mode NORMAL in that case.
+ */
+ if (val == MAX77802_STATUS_OFF)
+ max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
+ else
+ max77802->opmode[id] = val;
+
+ rdev = devm_regulator_register(&pdev->dev,
+ ®ulators[i], &config);
+ if (IS_ERR(rdev)) {
+ ret = PTR_ERR(rdev);
+ dev_err(&pdev->dev,
+ "regulator init failed for %d: %d\n", i, ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id max77802_pmic_id[] = {
+ {"max77802-pmic", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
+
+static struct platform_driver max77802_pmic_driver = {
+ .driver = {
+ .name = "max77802-pmic",
+ },
+ .probe = max77802_pmic_probe,
+ .id_table = max77802_pmic_id,
+};
+
+module_platform_driver(max77802_pmic_driver);
+
+MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
+MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
+MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * max77802.c - Regulator driver for the Maxim 77802
- *
- * Copyright (C) 2013-2014 Google, Inc
- * Simon Glass <sjg@chromium.org>
- *
- * Copyright (C) 2012 Samsung Electronics
- * Chiwoong Byun <woong.byun@smasung.com>
- * Jonghwa Lee <jonghwa3.lee@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * This driver is based on max8997.c
- */
-
-#include <linux/kernel.h>
-#include <linux/bug.h>
-#include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/slab.h>
-#include <linux/gpio/consumer.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/regulator/driver.h>
-#include <linux/regulator/machine.h>
-#include <linux/regulator/of_regulator.h>
-#include <linux/mfd/max77686.h>
-#include <linux/mfd/max77686-private.h>
-#include <dt-bindings/regulator/maxim,max77802.h>
-
-/* Default ramp delay in case it is not manually set */
-#define MAX77802_RAMP_DELAY 100000 /* uV/us */
-
-#define MAX77802_OPMODE_SHIFT_LDO 6
-#define MAX77802_OPMODE_BUCK234_SHIFT 4
-#define MAX77802_OPMODE_MASK 0x3
-
-#define MAX77802_VSEL_MASK 0x3F
-#define MAX77802_DVS_VSEL_MASK 0xFF
-
-#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0
-#define MAX77802_RAMP_RATE_SHIFT_2BIT 6
-#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0
-#define MAX77802_RAMP_RATE_SHIFT_4BIT 4
-
-#define MAX77802_STATUS_OFF 0x0
-#define MAX77802_OFF_PWRREQ 0x1
-#define MAX77802_LP_PWRREQ 0x2
-
-/* MAX77802 has two register formats: 2-bit and 4-bit */
-static const unsigned int ramp_table_77802_2bit[] = {
- 12500,
- 25000,
- 50000,
- 100000,
-};
-
-static unsigned int ramp_table_77802_4bit[] = {
- 1000, 2000, 3030, 4000,
- 5000, 5880, 7140, 8330,
- 9090, 10000, 11110, 12500,
- 16670, 25000, 50000, 100000,
-};
-
-struct max77802_regulator_prv {
- /* Array indexed by regulator id */
- unsigned int opmode[MAX77802_REG_MAX];
-};
-
-static inline unsigned int max77802_map_mode(unsigned int mode)
-{
- return mode == MAX77802_OPMODE_NORMAL ?
- REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
-}
-
-static int max77802_get_opmode_shift(int id)
-{
- if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
- id <= MAX77802_BUCK10))
- return 0;
-
- if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4)
- return MAX77802_OPMODE_BUCK234_SHIFT;
-
- if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35)
- return MAX77802_OPMODE_SHIFT_LDO;
-
- return -EINVAL;
-}
-
-/**
- * max77802_set_suspend_disable - Disable the regulator during system suspend
- * @rdev: regulator to mark as disabled
- *
- * All regulators expect LDO 1, 3, 20 and 21 support OFF by PWRREQ.
- * Configure the regulator so the PMIC will turn it OFF during system suspend.
- */
-static int max77802_set_suspend_disable(struct regulator_dev *rdev)
-{
- unsigned int val = MAX77802_OFF_PWRREQ;
- struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
- int id = rdev_get_id(rdev);
- int shift = max77802_get_opmode_shift(id);
-
- max77802->opmode[id] = val;
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val << shift);
-}
-
-/*
- * Some LDOs support Low Power Mode while the system is running.
- *
- * LDOs 1, 3, 20, 21.
- */
-static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
-{
- struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
- int id = rdev_get_id(rdev);
- unsigned int val;
- int shift = max77802_get_opmode_shift(id);
-
- switch (mode) {
- case REGULATOR_MODE_STANDBY:
- val = MAX77802_OPMODE_LP; /* ON in Low Power Mode */
- break;
- case REGULATOR_MODE_NORMAL:
- val = MAX77802_OPMODE_NORMAL; /* ON in Normal Mode */
- break;
- default:
- dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
- rdev->desc->name, mode);
- return -EINVAL;
- }
-
- max77802->opmode[id] = val;
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val << shift);
-}
-
-static unsigned max77802_get_mode(struct regulator_dev *rdev)
-{
- struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
- int id = rdev_get_id(rdev);
-
- return max77802_map_mode(max77802->opmode[id]);
-}
-
-/**
- * max77802_set_suspend_mode - set regulator opmode when the system is suspended
- * @rdev: regulator to change mode
- * @mode: operating mode to be set
- *
- * Will set the operating mode for the regulators during system suspend.
- * This function is valid for the three different enable control logics:
- *
- * Enable Control Logic1 by PWRREQ (BUCK 2-4 and LDOs 2, 4-19, 22-35)
- * Enable Control Logic2 by PWRREQ (LDOs 1, 20, 21)
- * Enable Control Logic3 by PWRREQ (LDO 3)
- *
- * If setting the regulator mode fails, the function only warns but does
- * not return an error code to avoid the regulator core to stop setting
- * the operating mode for the remaining regulators.
- */
-static int max77802_set_suspend_mode(struct regulator_dev *rdev,
- unsigned int mode)
-{
- struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
- int id = rdev_get_id(rdev);
- unsigned int val;
- int shift = max77802_get_opmode_shift(id);
-
- /*
- * If the regulator has been disabled for suspend
- * then is invalid to try setting a suspend mode.
- */
- if (max77802->opmode[id] == MAX77802_OFF_PWRREQ) {
- dev_warn(&rdev->dev, "%s: is disabled, mode: 0x%x not set\n",
- rdev->desc->name, mode);
- return 0;
- }
-
- switch (mode) {
- case REGULATOR_MODE_STANDBY:
- /*
- * If the regulator opmode is normal then enable
- * ON in Low Power Mode by PWRREQ. If the mode is
- * already Low Power then no action is required.
- */
- if (max77802->opmode[id] == MAX77802_OPMODE_NORMAL)
- val = MAX77802_LP_PWRREQ;
- else
- return 0;
- break;
- case REGULATOR_MODE_NORMAL:
- /*
- * If the regulator operating mode is Low Power then
- * normal is not a valid opmode in suspend. If the
- * mode is already normal then no action is required.
- */
- if (max77802->opmode[id] == MAX77802_OPMODE_LP)
- dev_warn(&rdev->dev, "%s: in Low Power: 0x%x invalid\n",
- rdev->desc->name, mode);
- return 0;
- default:
- dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
- rdev->desc->name, mode);
- return -EINVAL;
- }
-
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask, val << shift);
-}
-
-static int max77802_enable(struct regulator_dev *rdev)
-{
- struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
- int id = rdev_get_id(rdev);
- int shift = max77802_get_opmode_shift(id);
-
- if (max77802->opmode[id] == MAX77802_OFF_PWRREQ)
- max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
-
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- rdev->desc->enable_mask,
- max77802->opmode[id] << shift);
-}
-
-static int max77802_find_ramp_value(struct regulator_dev *rdev,
- const unsigned int limits[], int size,
- unsigned int ramp_delay)
-{
- int i;
-
- for (i = 0; i < size; i++) {
- if (ramp_delay <= limits[i])
- return i;
- }
-
- /* Use maximum value for no ramp control */
- dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n",
- rdev->desc->name, ramp_delay);
- return size - 1;
-}
-
-/* Used for BUCKs 2-4 */
-static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev,
- int ramp_delay)
-{
- int id = rdev_get_id(rdev);
- unsigned int ramp_value;
-
- if (id > MAX77802_BUCK4) {
- dev_warn(&rdev->dev,
- "%s: regulator: ramp delay not supported\n",
- rdev->desc->name);
- return -EINVAL;
- }
- ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit,
- ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay);
-
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- MAX77802_RAMP_RATE_MASK_2BIT,
- ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT);
-}
-
-/* For BUCK1, 6 */
-static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev,
- int ramp_delay)
-{
- unsigned int ramp_value;
-
- ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit,
- ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay);
-
- return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
- MAX77802_RAMP_RATE_MASK_4BIT,
- ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT);
-}
-
-/*
- * LDOs 2, 4-19, 22-35
- */
-static struct regulator_ops max77802_ldo_ops_logic1 = {
- .list_voltage = regulator_list_voltage_linear,
- .map_voltage = regulator_map_voltage_linear,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = max77802_enable,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_suspend_disable = max77802_set_suspend_disable,
- .set_suspend_mode = max77802_set_suspend_mode,
-};
-
-/*
- * LDOs 1, 20, 21, 3
- */
-static struct regulator_ops max77802_ldo_ops_logic2 = {
- .list_voltage = regulator_list_voltage_linear,
- .map_voltage = regulator_map_voltage_linear,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = max77802_enable,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_mode = max77802_set_mode,
- .get_mode = max77802_get_mode,
- .set_suspend_mode = max77802_set_suspend_mode,
-};
-
-/* BUCKS 1, 6 */
-static struct regulator_ops max77802_buck_16_dvs_ops = {
- .list_voltage = regulator_list_voltage_linear,
- .map_voltage = regulator_map_voltage_linear,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = max77802_enable,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_ramp_delay = max77802_set_ramp_delay_4bit,
- .set_suspend_disable = max77802_set_suspend_disable,
-};
-
-/* BUCKs 2-4 */
-static struct regulator_ops max77802_buck_234_ops = {
- .list_voltage = regulator_list_voltage_linear,
- .map_voltage = regulator_map_voltage_linear,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = max77802_enable,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_ramp_delay = max77802_set_ramp_delay_2bit,
- .set_suspend_disable = max77802_set_suspend_disable,
- .set_suspend_mode = max77802_set_suspend_mode,
-};
-
-/* BUCKs 5, 7-10 */
-static struct regulator_ops max77802_buck_dvs_ops = {
- .list_voltage = regulator_list_voltage_linear,
- .map_voltage = regulator_map_voltage_linear,
- .is_enabled = regulator_is_enabled_regmap,
- .enable = max77802_enable,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_ramp_delay = max77802_set_ramp_delay_2bit,
- .set_suspend_disable = max77802_set_suspend_disable,
-};
-
-/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */
-#define regulator_77802_desc_p_ldo(num, supply, log) { \
- .name = "LDO"#num, \
- .of_match = of_match_ptr("LDO"#num), \
- .regulators_node = of_match_ptr("regulators"), \
- .id = MAX77802_LDO##num, \
- .supply_name = "inl"#supply, \
- .ops = &max77802_ldo_ops_logic##log, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = 800000, \
- .uV_step = 50000, \
- .ramp_delay = MAX77802_RAMP_DELAY, \
- .n_voltages = 1 << 6, \
- .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
- .vsel_mask = MAX77802_VSEL_MASK, \
- .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
- .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
- .of_map_mode = max77802_map_mode, \
-}
-
-/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */
-#define regulator_77802_desc_n_ldo(num, supply, log) { \
- .name = "LDO"#num, \
- .of_match = of_match_ptr("LDO"#num), \
- .regulators_node = of_match_ptr("regulators"), \
- .id = MAX77802_LDO##num, \
- .supply_name = "inl"#supply, \
- .ops = &max77802_ldo_ops_logic##log, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = 800000, \
- .uV_step = 25000, \
- .ramp_delay = MAX77802_RAMP_DELAY, \
- .n_voltages = 1 << 6, \
- .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
- .vsel_mask = MAX77802_VSEL_MASK, \
- .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \
- .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \
- .of_map_mode = max77802_map_mode, \
-}
-
-/* BUCKs 1, 6 */
-#define regulator_77802_desc_16_buck(num) { \
- .name = "BUCK"#num, \
- .of_match = of_match_ptr("BUCK"#num), \
- .regulators_node = of_match_ptr("regulators"), \
- .id = MAX77802_BUCK##num, \
- .supply_name = "inb"#num, \
- .ops = &max77802_buck_16_dvs_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = 612500, \
- .uV_step = 6250, \
- .ramp_delay = MAX77802_RAMP_DELAY, \
- .n_voltages = 1 << 8, \
- .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
- .vsel_mask = MAX77802_DVS_VSEL_MASK, \
- .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \
- .enable_mask = MAX77802_OPMODE_MASK, \
- .of_map_mode = max77802_map_mode, \
-}
-
-/* BUCKS 2-4 */
-#define regulator_77802_desc_234_buck(num) { \
- .name = "BUCK"#num, \
- .of_match = of_match_ptr("BUCK"#num), \
- .regulators_node = of_match_ptr("regulators"), \
- .id = MAX77802_BUCK##num, \
- .supply_name = "inb"#num, \
- .ops = &max77802_buck_234_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = 600000, \
- .uV_step = 6250, \
- .ramp_delay = MAX77802_RAMP_DELAY, \
- .n_voltages = 0x91, \
- .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \
- .vsel_mask = MAX77802_DVS_VSEL_MASK, \
- .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \
- .enable_mask = MAX77802_OPMODE_MASK << \
- MAX77802_OPMODE_BUCK234_SHIFT, \
- .of_map_mode = max77802_map_mode, \
-}
-
-/* BUCK 5 */
-#define regulator_77802_desc_buck5(num) { \
- .name = "BUCK"#num, \
- .of_match = of_match_ptr("BUCK"#num), \
- .regulators_node = of_match_ptr("regulators"), \
- .id = MAX77802_BUCK##num, \
- .supply_name = "inb"#num, \
- .ops = &max77802_buck_dvs_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = 750000, \
- .uV_step = 50000, \
- .ramp_delay = MAX77802_RAMP_DELAY, \
- .n_voltages = 1 << 6, \
- .vsel_reg = MAX77802_REG_BUCK5OUT, \
- .vsel_mask = MAX77802_VSEL_MASK, \
- .enable_reg = MAX77802_REG_BUCK5CTRL, \
- .enable_mask = MAX77802_OPMODE_MASK, \
- .of_map_mode = max77802_map_mode, \
-}
-
-/* BUCKs 7-10 */
-#define regulator_77802_desc_buck7_10(num) { \
- .name = "BUCK"#num, \
- .of_match = of_match_ptr("BUCK"#num), \
- .regulators_node = of_match_ptr("regulators"), \
- .id = MAX77802_BUCK##num, \
- .supply_name = "inb"#num, \
- .ops = &max77802_buck_dvs_ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .min_uV = 750000, \
- .uV_step = 50000, \
- .ramp_delay = MAX77802_RAMP_DELAY, \
- .n_voltages = 1 << 6, \
- .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \
- .vsel_mask = MAX77802_VSEL_MASK, \
- .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \
- .enable_mask = MAX77802_OPMODE_MASK, \
- .of_map_mode = max77802_map_mode, \
-}
-
-static const struct regulator_desc regulators[] = {
- regulator_77802_desc_16_buck(1),
- regulator_77802_desc_234_buck(2),
- regulator_77802_desc_234_buck(3),
- regulator_77802_desc_234_buck(4),
- regulator_77802_desc_buck5(5),
- regulator_77802_desc_16_buck(6),
- regulator_77802_desc_buck7_10(7),
- regulator_77802_desc_buck7_10(8),
- regulator_77802_desc_buck7_10(9),
- regulator_77802_desc_buck7_10(10),
- regulator_77802_desc_n_ldo(1, 10, 2),
- regulator_77802_desc_n_ldo(2, 10, 1),
- regulator_77802_desc_p_ldo(3, 3, 2),
- regulator_77802_desc_p_ldo(4, 6, 1),
- regulator_77802_desc_p_ldo(5, 3, 1),
- regulator_77802_desc_p_ldo(6, 3, 1),
- regulator_77802_desc_p_ldo(7, 3, 1),
- regulator_77802_desc_n_ldo(8, 1, 1),
- regulator_77802_desc_p_ldo(9, 5, 1),
- regulator_77802_desc_p_ldo(10, 4, 1),
- regulator_77802_desc_p_ldo(11, 4, 1),
- regulator_77802_desc_p_ldo(12, 9, 1),
- regulator_77802_desc_p_ldo(13, 4, 1),
- regulator_77802_desc_p_ldo(14, 4, 1),
- regulator_77802_desc_n_ldo(15, 1, 1),
- regulator_77802_desc_n_ldo(17, 2, 1),
- regulator_77802_desc_p_ldo(18, 7, 1),
- regulator_77802_desc_p_ldo(19, 5, 1),
- regulator_77802_desc_p_ldo(20, 7, 2),
- regulator_77802_desc_p_ldo(21, 6, 2),
- regulator_77802_desc_p_ldo(23, 9, 1),
- regulator_77802_desc_p_ldo(24, 6, 1),
- regulator_77802_desc_p_ldo(25, 9, 1),
- regulator_77802_desc_p_ldo(26, 9, 1),
- regulator_77802_desc_n_ldo(27, 2, 1),
- regulator_77802_desc_p_ldo(28, 7, 1),
- regulator_77802_desc_p_ldo(29, 7, 1),
- regulator_77802_desc_n_ldo(30, 2, 1),
- regulator_77802_desc_p_ldo(32, 9, 1),
- regulator_77802_desc_p_ldo(33, 6, 1),
- regulator_77802_desc_p_ldo(34, 9, 1),
- regulator_77802_desc_n_ldo(35, 2, 1),
-};
-
-static int max77802_pmic_probe(struct platform_device *pdev)
-{
- struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
- struct max77802_regulator_prv *max77802;
- int i, val;
- struct regulator_config config = { };
-
- max77802 = devm_kzalloc(&pdev->dev,
- sizeof(struct max77802_regulator_prv),
- GFP_KERNEL);
- if (!max77802)
- return -ENOMEM;
-
- config.dev = iodev->dev;
- config.regmap = iodev->regmap;
- config.driver_data = max77802;
- platform_set_drvdata(pdev, max77802);
-
- for (i = 0; i < MAX77802_REG_MAX; i++) {
- struct regulator_dev *rdev;
- int id = regulators[i].id;
- int shift = max77802_get_opmode_shift(id);
- int ret;
-
- ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val);
- if (ret < 0) {
- dev_warn(&pdev->dev,
- "cannot read current mode for %d\n", i);
- val = MAX77802_OPMODE_NORMAL;
- } else {
- val = val >> shift & MAX77802_OPMODE_MASK;
- }
-
- /*
- * If the regulator is disabled and the system warm rebooted,
- * the hardware reports OFF as the regulator operating mode.
- * Default to operating mode NORMAL in that case.
- */
- if (val == MAX77802_STATUS_OFF)
- max77802->opmode[id] = MAX77802_OPMODE_NORMAL;
- else
- max77802->opmode[id] = val;
-
- rdev = devm_regulator_register(&pdev->dev,
- ®ulators[i], &config);
- if (IS_ERR(rdev)) {
- ret = PTR_ERR(rdev);
- dev_err(&pdev->dev,
- "regulator init failed for %d: %d\n", i, ret);
- return ret;
- }
- }
-
- return 0;
-}
-
-static const struct platform_device_id max77802_pmic_id[] = {
- {"max77802-pmic", 0},
- { },
-};
-MODULE_DEVICE_TABLE(platform, max77802_pmic_id);
-
-static struct platform_driver max77802_pmic_driver = {
- .driver = {
- .name = "max77802-pmic",
- },
- .probe = max77802_pmic_probe,
- .id_table = max77802_pmic_id,
-};
-
-module_platform_driver(max77802_pmic_driver);
-
-MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver");
-MODULE_AUTHOR("Simon Glass <sjg@chromium.org>");
-MODULE_LICENSE("GPL");
projects / deliverable / linux.git / commitdiff
