2 * axp20x.c - MFD core driver for the X-Powers AXP202 and AXP209
4 * AXP20x comprises an adaptive USB-Compatible PWM charger, 2 BUCK DC-DC
5 * converters, 5 LDOs, multiple 12-bit ADCs of voltage, current and temperature
6 * as well as 4 configurable GPIOs.
8 * Author: Carlo Caione <carlo@caione.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
15 #include <linux/err.h>
16 #include <linux/i2c.h>
17 #include <linux/interrupt.h>
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/regmap.h>
22 #include <linux/slab.h>
23 #include <linux/regulator/consumer.h>
24 #include <linux/mfd/axp20x.h>
25 #include <linux/mfd/core.h>
26 #include <linux/of_device.h>
27 #include <linux/of_irq.h>
29 #define AXP20X_OFF 0x80
31 static const struct regmap_range axp20x_writeable_ranges
[] = {
32 regmap_reg_range(AXP20X_DATACACHE(0), AXP20X_IRQ5_STATE
),
33 regmap_reg_range(AXP20X_DCDC_MODE
, AXP20X_FG_RES
),
36 static const struct regmap_range axp20x_volatile_ranges
[] = {
37 regmap_reg_range(AXP20X_IRQ1_EN
, AXP20X_IRQ5_STATE
),
40 static const struct regmap_access_table axp20x_writeable_table
= {
41 .yes_ranges
= axp20x_writeable_ranges
,
42 .n_yes_ranges
= ARRAY_SIZE(axp20x_writeable_ranges
),
45 static const struct regmap_access_table axp20x_volatile_table
= {
46 .yes_ranges
= axp20x_volatile_ranges
,
47 .n_yes_ranges
= ARRAY_SIZE(axp20x_volatile_ranges
),
50 static struct resource axp20x_pek_resources
[] = {
53 .start
= AXP20X_IRQ_PEK_RIS_EDGE
,
54 .end
= AXP20X_IRQ_PEK_RIS_EDGE
,
55 .flags
= IORESOURCE_IRQ
,
58 .start
= AXP20X_IRQ_PEK_FAL_EDGE
,
59 .end
= AXP20X_IRQ_PEK_FAL_EDGE
,
60 .flags
= IORESOURCE_IRQ
,
64 static const struct regmap_config axp20x_regmap_config
= {
67 .wr_table
= &axp20x_writeable_table
,
68 .volatile_table
= &axp20x_volatile_table
,
69 .max_register
= AXP20X_FG_RES
,
70 .cache_type
= REGCACHE_RBTREE
,
73 #define AXP20X_IRQ(_irq, _off, _mask) \
74 [AXP20X_IRQ_##_irq] = { .reg_offset = (_off), .mask = BIT(_mask) }
76 static const struct regmap_irq axp20x_regmap_irqs
[] = {
77 AXP20X_IRQ(ACIN_OVER_V
, 0, 7),
78 AXP20X_IRQ(ACIN_PLUGIN
, 0, 6),
79 AXP20X_IRQ(ACIN_REMOVAL
, 0, 5),
80 AXP20X_IRQ(VBUS_OVER_V
, 0, 4),
81 AXP20X_IRQ(VBUS_PLUGIN
, 0, 3),
82 AXP20X_IRQ(VBUS_REMOVAL
, 0, 2),
83 AXP20X_IRQ(VBUS_V_LOW
, 0, 1),
84 AXP20X_IRQ(BATT_PLUGIN
, 1, 7),
85 AXP20X_IRQ(BATT_REMOVAL
, 1, 6),
86 AXP20X_IRQ(BATT_ENT_ACT_MODE
, 1, 5),
87 AXP20X_IRQ(BATT_EXIT_ACT_MODE
, 1, 4),
88 AXP20X_IRQ(CHARG
, 1, 3),
89 AXP20X_IRQ(CHARG_DONE
, 1, 2),
90 AXP20X_IRQ(BATT_TEMP_HIGH
, 1, 1),
91 AXP20X_IRQ(BATT_TEMP_LOW
, 1, 0),
92 AXP20X_IRQ(DIE_TEMP_HIGH
, 2, 7),
93 AXP20X_IRQ(CHARG_I_LOW
, 2, 6),
94 AXP20X_IRQ(DCDC1_V_LONG
, 2, 5),
95 AXP20X_IRQ(DCDC2_V_LONG
, 2, 4),
96 AXP20X_IRQ(DCDC3_V_LONG
, 2, 3),
97 AXP20X_IRQ(PEK_SHORT
, 2, 1),
98 AXP20X_IRQ(PEK_LONG
, 2, 0),
99 AXP20X_IRQ(N_OE_PWR_ON
, 3, 7),
100 AXP20X_IRQ(N_OE_PWR_OFF
, 3, 6),
101 AXP20X_IRQ(VBUS_VALID
, 3, 5),
102 AXP20X_IRQ(VBUS_NOT_VALID
, 3, 4),
103 AXP20X_IRQ(VBUS_SESS_VALID
, 3, 3),
104 AXP20X_IRQ(VBUS_SESS_END
, 3, 2),
105 AXP20X_IRQ(LOW_PWR_LVL1
, 3, 1),
106 AXP20X_IRQ(LOW_PWR_LVL2
, 3, 0),
107 AXP20X_IRQ(TIMER
, 4, 7),
108 AXP20X_IRQ(PEK_RIS_EDGE
, 4, 6),
109 AXP20X_IRQ(PEK_FAL_EDGE
, 4, 5),
110 AXP20X_IRQ(GPIO3_INPUT
, 4, 3),
111 AXP20X_IRQ(GPIO2_INPUT
, 4, 2),
112 AXP20X_IRQ(GPIO1_INPUT
, 4, 1),
113 AXP20X_IRQ(GPIO0_INPUT
, 4, 0),
116 static const struct of_device_id axp20x_of_match
[] = {
117 { .compatible
= "x-powers,axp202", .data
= (void *) AXP202_ID
},
118 { .compatible
= "x-powers,axp209", .data
= (void *) AXP209_ID
},
121 MODULE_DEVICE_TABLE(of
, axp20x_of_match
);
124 * This is useless for OF-enabled devices, but it is needed by I2C subsystem
126 static const struct i2c_device_id axp20x_i2c_id
[] = {
129 MODULE_DEVICE_TABLE(i2c
, axp20x_i2c_id
);
131 static const struct regmap_irq_chip axp20x_regmap_irq_chip
= {
132 .name
= "axp20x_irq_chip",
133 .status_base
= AXP20X_IRQ1_STATE
,
134 .ack_base
= AXP20X_IRQ1_STATE
,
135 .mask_base
= AXP20X_IRQ1_EN
,
137 .irqs
= axp20x_regmap_irqs
,
138 .num_irqs
= ARRAY_SIZE(axp20x_regmap_irqs
),
140 .init_ack_masked
= true,
143 static struct mfd_cell axp20x_cells
[] = {
145 .name
= "axp20x-pek",
146 .num_resources
= ARRAY_SIZE(axp20x_pek_resources
),
147 .resources
= axp20x_pek_resources
,
149 .name
= "axp20x-regulator",
153 static struct axp20x_dev
*axp20x_pm_power_off
;
154 static void axp20x_power_off(void)
156 regmap_write(axp20x_pm_power_off
->regmap
, AXP20X_OFF_CTRL
,
160 static int axp20x_i2c_probe(struct i2c_client
*i2c
,
161 const struct i2c_device_id
*id
)
163 struct axp20x_dev
*axp20x
;
164 const struct of_device_id
*of_id
;
167 axp20x
= devm_kzalloc(&i2c
->dev
, sizeof(*axp20x
), GFP_KERNEL
);
171 of_id
= of_match_device(axp20x_of_match
, &i2c
->dev
);
173 dev_err(&i2c
->dev
, "Unable to setup AXP20X data\n");
176 axp20x
->variant
= (long) of_id
->data
;
178 axp20x
->i2c_client
= i2c
;
179 axp20x
->dev
= &i2c
->dev
;
180 dev_set_drvdata(axp20x
->dev
, axp20x
);
182 axp20x
->regmap
= devm_regmap_init_i2c(i2c
, &axp20x_regmap_config
);
183 if (IS_ERR(axp20x
->regmap
)) {
184 ret
= PTR_ERR(axp20x
->regmap
);
185 dev_err(&i2c
->dev
, "regmap init failed: %d\n", ret
);
189 ret
= regmap_add_irq_chip(axp20x
->regmap
, i2c
->irq
,
190 IRQF_ONESHOT
| IRQF_SHARED
, -1,
191 &axp20x_regmap_irq_chip
,
192 &axp20x
->regmap_irqc
);
194 dev_err(&i2c
->dev
, "failed to add irq chip: %d\n", ret
);
198 ret
= mfd_add_devices(axp20x
->dev
, -1, axp20x_cells
,
199 ARRAY_SIZE(axp20x_cells
), NULL
, 0, NULL
);
202 dev_err(&i2c
->dev
, "failed to add MFD devices: %d\n", ret
);
203 regmap_del_irq_chip(i2c
->irq
, axp20x
->regmap_irqc
);
208 axp20x_pm_power_off
= axp20x
;
209 pm_power_off
= axp20x_power_off
;
212 dev_info(&i2c
->dev
, "AXP20X driver loaded\n");
217 static int axp20x_i2c_remove(struct i2c_client
*i2c
)
219 struct axp20x_dev
*axp20x
= i2c_get_clientdata(i2c
);
221 if (axp20x
== axp20x_pm_power_off
) {
222 axp20x_pm_power_off
= NULL
;
226 mfd_remove_devices(axp20x
->dev
);
227 regmap_del_irq_chip(axp20x
->i2c_client
->irq
, axp20x
->regmap_irqc
);
232 static struct i2c_driver axp20x_i2c_driver
= {
235 .owner
= THIS_MODULE
,
236 .of_match_table
= of_match_ptr(axp20x_of_match
),
238 .probe
= axp20x_i2c_probe
,
239 .remove
= axp20x_i2c_remove
,
240 .id_table
= axp20x_i2c_id
,
243 module_i2c_driver(axp20x_i2c_driver
);
245 MODULE_DESCRIPTION("PMIC MFD core driver for AXP20X");
246 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
247 MODULE_LICENSE("GPL");