[deliverable/linux.git] / drivers / regulator / arizona-ldo1.c

/*
 * arizona-ldo1.c  --  LDO1 supply for Arizona devices
 *
 * Copyright 2012 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.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.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/gpio.h>
#include <linux/slab.h>

#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/pdata.h>
#include <linux/mfd/arizona/registers.h>

struct arizona_ldo1 {
	struct regulator_dev *regulator;
	struct arizona *arizona;

	struct regulator_consumer_supply supply;
	struct regulator_init_data init_data;
};

static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
					unsigned int selector)
{
	if (selector >= rdev->desc->n_voltages)
		return -EINVAL;

	if (selector == rdev->desc->n_voltages - 1)
		return 1800000;
	else
		return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
}

static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev,
				       int min_uV, int max_uV)
{
	int sel;

	sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
	if (sel >= rdev->desc->n_voltages)
		sel = rdev->desc->n_voltages - 1;

	return sel;
}

static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
					   unsigned sel)
{
	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	struct regmap *regmap = ldo->arizona->regmap;
	unsigned int val;
	int ret;

	if (sel == rdev->desc->n_voltages - 1)
		val = ARIZONA_LDO1_HI_PWR;
	else
		val = 0;

	ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
				 ARIZONA_LDO1_HI_PWR, val);
	if (ret != 0)
		return ret;

	if (val)
		return 0;

	val = sel << ARIZONA_LDO1_VSEL_SHIFT;

	return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1,
				  ARIZONA_LDO1_VSEL_MASK, val);
}

static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
{
	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	struct regmap *regmap = ldo->arizona->regmap;
	unsigned int val;
	int ret;

	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
	if (ret != 0)
		return ret;

	if (val & ARIZONA_LDO1_HI_PWR)
		return rdev->desc->n_voltages - 1;

	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val);
	if (ret != 0)
		return ret;

	return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
}

static struct regulator_ops arizona_ldo1_hc_ops = {
	.list_voltage = arizona_ldo1_hc_list_voltage,
	.map_voltage = arizona_ldo1_hc_map_voltage,
	.get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
	.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
	.get_bypass = regulator_get_bypass_regmap,
	.set_bypass = regulator_set_bypass_regmap,
};

static const struct regulator_desc arizona_ldo1_hc = {
	.name = "LDO1",
	.supply_name = "LDOVDD",
	.type = REGULATOR_VOLTAGE,
	.ops = &arizona_ldo1_hc_ops,

	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
	.bypass_mask = ARIZONA_LDO1_BYPASS,
	.min_uV = 900000,
	.uV_step = 50000,
	.n_voltages = 8,
	.enable_time = 1500,

	.owner = THIS_MODULE,
};

static struct regulator_ops arizona_ldo1_ops = {
	.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,
};

static const struct regulator_desc arizona_ldo1 = {
	.name = "LDO1",
	.supply_name = "LDOVDD",
	.type = REGULATOR_VOLTAGE,
	.ops = &arizona_ldo1_ops,

	.vsel_reg = ARIZONA_LDO1_CONTROL_1,
	.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
	.min_uV = 900000,
	.uV_step = 25000,
	.n_voltages = 13,
	.enable_time = 500,

	.owner = THIS_MODULE,
};

static const struct regulator_init_data arizona_ldo1_dvfs = {
	.constraints = {
		.min_uV = 1200000,
		.max_uV = 1800000,
		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
				  REGULATOR_CHANGE_VOLTAGE,
	},
	.num_consumer_supplies = 1,
};

static const struct regulator_init_data arizona_ldo1_default = {
	.constraints = {
		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	},
	.num_consumer_supplies = 1,
};

static const struct regulator_init_data arizona_ldo1_wm5110 = {
	.constraints = {
		.min_uV = 1175000,
		.max_uV = 1200000,
		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
				  REGULATOR_CHANGE_VOLTAGE,
	},
	.num_consumer_supplies = 1,
};

static int arizona_ldo1_of_get_pdata(struct arizona *arizona,
				     struct regulator_config *config,
				     const struct regulator_desc *desc)
{
	struct arizona_pdata *pdata = &arizona->pdata;
	struct arizona_ldo1 *ldo1 = config->driver_data;
	struct device_node *init_node, *dcvdd_node;
	struct regulator_init_data *init_data;

	pdata->ldoena = arizona_of_get_named_gpio(arizona, "wlf,ldoena", true);

	init_node = of_get_child_by_name(arizona->dev->of_node, "ldo1");
	dcvdd_node = of_parse_phandle(arizona->dev->of_node, "DCVDD-supply", 0);

	if (init_node) {
		config->of_node = init_node;

		init_data = of_get_regulator_init_data(arizona->dev, init_node,
						       desc);

		if (init_data) {
			init_data->consumer_supplies = &ldo1->supply;
			init_data->num_consumer_supplies = 1;

			if (dcvdd_node && dcvdd_node != init_node)
				arizona->external_dcvdd = true;

			pdata->ldo1 = init_data;
		}
	} else if (dcvdd_node) {
		arizona->external_dcvdd = true;
	}

	of_node_put(dcvdd_node);

	return 0;
}

static int arizona_ldo1_probe(struct platform_device *pdev)
{
	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	const struct regulator_desc *desc;
	struct regulator_config config = { };
	struct arizona_ldo1 *ldo1;
	int ret;

	arizona->external_dcvdd = false;

	ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
	if (!ldo1)
		return -ENOMEM;

	ldo1->arizona = arizona;

	/*
	 * Since the chip usually supplies itself we provide some
	 * default init_data for it.  This will be overridden with
	 * platform data if provided.
	 */
	switch (arizona->type) {
	case WM5102:
	case WM8997:
		desc = &arizona_ldo1_hc;
		ldo1->init_data = arizona_ldo1_dvfs;
		break;
	case WM5110:
	case WM8280:
		desc = &arizona_ldo1;
		ldo1->init_data = arizona_ldo1_wm5110;
		break;
	default:
		desc = &arizona_ldo1;
		ldo1->init_data = arizona_ldo1_default;
		break;
	}

	ldo1->init_data.consumer_supplies = &ldo1->supply;
	ldo1->supply.supply = "DCVDD";
	ldo1->supply.dev_name = dev_name(arizona->dev);

	config.dev = arizona->dev;
	config.driver_data = ldo1;
	config.regmap = arizona->regmap;

	if (IS_ENABLED(CONFIG_OF)) {
		if (!dev_get_platdata(arizona->dev)) {
			ret = arizona_ldo1_of_get_pdata(arizona, &config, desc);
			if (ret < 0)
				return ret;

			config.ena_gpio_initialized = true;
		}
	}

	config.ena_gpio = arizona->pdata.ldoena;

	if (arizona->pdata.ldo1)
		config.init_data = arizona->pdata.ldo1;
	else
		config.init_data = &ldo1->init_data;

	/*
	 * LDO1 can only be used to supply DCVDD so if it has no
	 * consumers then DCVDD is supplied externally.
	 */
	if (config.init_data->num_consumer_supplies == 0)
		arizona->external_dcvdd = true;

	ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);

	of_node_put(config.of_node);

	if (IS_ERR(ldo1->regulator)) {
		ret = PTR_ERR(ldo1->regulator);
		dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
			ret);
		return ret;
	}

	platform_set_drvdata(pdev, ldo1);

	return 0;
}

static struct platform_driver arizona_ldo1_driver = {
	.probe = arizona_ldo1_probe,
	.driver		= {
		.name	= "arizona-ldo1",
	},
};

module_platform_driver(arizona_ldo1_driver);

/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Arizona LDO1 driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:arizona-ldo1");
Commit	Line	Data
1910efa1 MB	1	/*
	2	* arizona-ldo1.c -- LDO1 supply for Arizona devices
	3	*
	4	* Copyright 2012 Wolfson Microelectronics PLC.
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/moduleparam.h>
	16	#include <linux/init.h>
	17	#include <linux/bitops.h>
	18	#include <linux/err.h>
7b22b9a5	19	#include <linux/of.h>
1910efa1 MB	20	#include <linux/platform_device.h>
	21	#include <linux/regulator/driver.h>
	22	#include <linux/regulator/machine.h>
2cce4be9	23	#include <linux/regulator/of_regulator.h>
1910efa1 MB	24	#include <linux/gpio.h>
	25	#include <linux/slab.h>
	26
	27	#include <linux/mfd/arizona/core.h>
	28	#include <linux/mfd/arizona/pdata.h>
	29	#include <linux/mfd/arizona/registers.h>
	30
	31	struct arizona_ldo1 {
	32	struct regulator_dev *regulator;
	33	struct arizona *arizona;
	34
	35	struct regulator_consumer_supply supply;
	36	struct regulator_init_data init_data;
	37	};
	38
73ee2946 MB	39	static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
	40	unsigned int selector)
	41	{
	42	if (selector >= rdev->desc->n_voltages)
	43	return -EINVAL;
	44
	45	if (selector == rdev->desc->n_voltages - 1)
	46	return 1800000;
	47	else
	48	return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
	49	}
	50
	51	static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev,
	52	int min_uV, int max_uV)
	53	{
	54	int sel;
	55
	56	sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
	57	if (sel >= rdev->desc->n_voltages)
	58	sel = rdev->desc->n_voltages - 1;
	59
	60	return sel;
	61	}
	62
	63	static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
	64	unsigned sel)
	65	{
	66	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	67	struct regmap *regmap = ldo->arizona->regmap;
	68	unsigned int val;
	69	int ret;
	70
	71	if (sel == rdev->desc->n_voltages - 1)
	72	val = ARIZONA_LDO1_HI_PWR;
	73	else
	74	val = 0;
	75
	76	ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
	77	ARIZONA_LDO1_HI_PWR, val);
	78	if (ret != 0)
	79	return ret;
	80
73ee2946 MB	81	if (val)
	82	return 0;
	83
	84	val = sel << ARIZONA_LDO1_VSEL_SHIFT;
	85
	86	return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1,
	87	ARIZONA_LDO1_VSEL_MASK, val);
	88	}
	89
	90	static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
	91	{
	92	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	93	struct regmap *regmap = ldo->arizona->regmap;
	94	unsigned int val;
	95	int ret;
	96
	97	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
	98	if (ret != 0)
	99	return ret;
	100
	101	if (val & ARIZONA_LDO1_HI_PWR)
	102	return rdev->desc->n_voltages - 1;
	103
	104	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val);
	105	if (ret != 0)
	106	return ret;
	107
	108	return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
	109	}
	110
	111	static struct regulator_ops arizona_ldo1_hc_ops = {
	112	.list_voltage = arizona_ldo1_hc_list_voltage,
	113	.map_voltage = arizona_ldo1_hc_map_voltage,
	114	.get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
	115	.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
	116	.get_bypass = regulator_get_bypass_regmap,
	117	.set_bypass = regulator_set_bypass_regmap,
	118	};
	119
	120	static const struct regulator_desc arizona_ldo1_hc = {
	121	.name = "LDO1",
	122	.supply_name = "LDOVDD",
	123	.type = REGULATOR_VOLTAGE,
	124	.ops = &arizona_ldo1_hc_ops,
	125
	126	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
	127	.bypass_mask = ARIZONA_LDO1_BYPASS,
	128	.min_uV = 900000,
	129	.uV_step = 50000,
	130	.n_voltages = 8,
ce1bcb7e	131	.enable_time = 1500,
73ee2946 MB	132
	133	.owner = THIS_MODULE,
	134	};
	135
1910efa1 MB	136	static struct regulator_ops arizona_ldo1_ops = {
	137	.list_voltage = regulator_list_voltage_linear,
	138	.map_voltage = regulator_map_voltage_linear,
	139	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	140	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	141	};
	142
	143	static const struct regulator_desc arizona_ldo1 = {
	144	.name = "LDO1",
	145	.supply_name = "LDOVDD",
	146	.type = REGULATOR_VOLTAGE,
	147	.ops = &arizona_ldo1_ops,
	148
	149	.vsel_reg = ARIZONA_LDO1_CONTROL_1,
	150	.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
	151	.min_uV = 900000,
a35ff286 CK	152	.uV_step = 25000,
a35ff286 CK	153	.n_voltages = 13,
86a14501	154	.enable_time = 500,
1910efa1 MB	155
	156	.owner = THIS_MODULE,
	157	};
	158
55a18aef MB	159	static const struct regulator_init_data arizona_ldo1_dvfs = {
	160	.constraints = {
	161	.min_uV = 1200000,
	162	.max_uV = 1800000,
	163	.valid_ops_mask = REGULATOR_CHANGE_STATUS \|
	164	REGULATOR_CHANGE_VOLTAGE,
	165	},
	166	.num_consumer_supplies = 1,
	167	};
	168
1910efa1	169	static const struct regulator_init_data arizona_ldo1_default = {
a9905b1d MB	170	.constraints = {
	171	.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	172	},
1910efa1 MB	173	.num_consumer_supplies = 1,
	174	};
	175
9a6c2feb CK	176	static const struct regulator_init_data arizona_ldo1_wm5110 = {
	177	.constraints = {
	178	.min_uV = 1175000,
	179	.max_uV = 1200000,
	180	.valid_ops_mask = REGULATOR_CHANGE_STATUS \|
	181	REGULATOR_CHANGE_VOLTAGE,
	182	},
	183	.num_consumer_supplies = 1,
	184	};
	185
2cce4be9	186	static int arizona_ldo1_of_get_pdata(struct arizona *arizona,
072e78b1 JMC	187	struct regulator_config *config,
072e78b1 JMC	188	const struct regulator_desc *desc)
4a8c475f CK	189	{
4a8c475f CK	190	struct arizona_pdata *pdata = &arizona->pdata;
2cce4be9 CK	191	struct arizona_ldo1 *ldo1 = config->driver_data;
	192	struct device_node init_node, dcvdd_node;
	193	struct regulator_init_data *init_data;
4a8c475f CK	194
	195	pdata->ldoena = arizona_of_get_named_gpio(arizona, "wlf,ldoena", true);
	196
2cce4be9 CK	197	init_node = of_get_child_by_name(arizona->dev->of_node, "ldo1");
	198	dcvdd_node = of_parse_phandle(arizona->dev->of_node, "DCVDD-supply", 0);
	199
	200	if (init_node) {
	201	config->of_node = init_node;
	202
072e78b1 JMC	203	init_data = of_get_regulator_init_data(arizona->dev, init_node,
072e78b1 JMC	204	desc);
2cce4be9 CK	205
	206	if (init_data) {
	207	init_data->consumer_supplies = &ldo1->supply;
	208	init_data->num_consumer_supplies = 1;
	209
	210	if (dcvdd_node && dcvdd_node != init_node)
	211	arizona->external_dcvdd = true;
	212
	213	pdata->ldo1 = init_data;
	214	}
	215	} else if (dcvdd_node) {
	216	arizona->external_dcvdd = true;
	217	}
	218
	219	of_node_put(dcvdd_node);
	220
4a8c475f CK	221	return 0;
	222	}
	223
a5023574	224	static int arizona_ldo1_probe(struct platform_device *pdev)
1910efa1 MB	225	{
1910efa1 MB	226	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
73ee2946	227	const struct regulator_desc *desc;
1910efa1 MB	228	struct regulator_config config = { };
	229	struct arizona_ldo1 *ldo1;
	230	int ret;
	231
4a8c475f CK	232	arizona->external_dcvdd = false;
4a8c475f CK	233
1910efa1	234	ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
f4a6c5b4	235	if (!ldo1)
1910efa1	236	return -ENOMEM;
1910efa1 MB	237
	238	ldo1->arizona = arizona;
	239
	240	/*
	241	* Since the chip usually supplies itself we provide some
	242	* default init_data for it. This will be overridden with
	243	* platform data if provided.
	244	*/
55a18aef MB	245	switch (arizona->type) {
55a18aef MB	246	case WM5102:
a35ff286	247	case WM8997:
73ee2946	248	desc = &arizona_ldo1_hc;
55a18aef MB	249	ldo1->init_data = arizona_ldo1_dvfs;
55a18aef MB	250	break;
9a6c2feb CK	251	case WM5110:
	252	case WM8280:
	253	desc = &arizona_ldo1;
	254	ldo1->init_data = arizona_ldo1_wm5110;
	255	break;
55a18aef	256	default:
73ee2946	257	desc = &arizona_ldo1;
55a18aef MB	258	ldo1->init_data = arizona_ldo1_default;
	259	break;
	260	}
	261
1910efa1 MB	262	ldo1->init_data.consumer_supplies = &ldo1->supply;
	263	ldo1->supply.supply = "DCVDD";
	264	ldo1->supply.dev_name = dev_name(arizona->dev);
	265
	266	config.dev = arizona->dev;
	267	config.driver_data = ldo1;
	268	config.regmap = arizona->regmap;
4a8c475f CK	269
	270	if (IS_ENABLED(CONFIG_OF)) {
	271	if (!dev_get_platdata(arizona->dev)) {
072e78b1	272	ret = arizona_ldo1_of_get_pdata(arizona, &config, desc);
4a8c475f CK	273	if (ret < 0)
4a8c475f CK	274	return ret;
1de3821a MP	275
1de3821a MP	276	config.ena_gpio_initialized = true;
4a8c475f CK	277	}
	278	}
	279
a9905b1d	280	config.ena_gpio = arizona->pdata.ldoena;
1910efa1 MB	281
	282	if (arizona->pdata.ldo1)
	283	config.init_data = arizona->pdata.ldo1;
	284	else
	285	config.init_data = &ldo1->init_data;
	286
4a8c475f CK	287	/*
	288	* LDO1 can only be used to supply DCVDD so if it has no
	289	* consumers then DCVDD is supplied externally.
	290	*/
	291	if (config.init_data->num_consumer_supplies == 0)
	292	arizona->external_dcvdd = true;
	293
14ffa888	294	ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);
ec454d70 CK	295
	296	of_node_put(config.of_node);
	297
1910efa1 MB	298	if (IS_ERR(ldo1->regulator)) {
	299	ret = PTR_ERR(ldo1->regulator);
	300	dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
	301	ret);
	302	return ret;
	303	}
	304
	305	platform_set_drvdata(pdev, ldo1);
	306
	307	return 0;
	308	}
	309
1910efa1 MB	310	static struct platform_driver arizona_ldo1_driver = {
1910efa1 MB	311	.probe = arizona_ldo1_probe,
1910efa1 MB	312	.driver = {
1910efa1 MB	313	.name = "arizona-ldo1",
1910efa1 MB	314	},
	315	};
	316
	317	module_platform_driver(arizona_ldo1_driver);
	318
	319	/* Module information */
	320	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	321	MODULE_DESCRIPTION("Arizona LDO1 driver");
	322	MODULE_LICENSE("GPL");
	323	MODULE_ALIAS("platform:arizona-ldo1");