1 // SPDX-License-Identifier: GPL-2.0-only
3 #include <linux/mfd/core.h>
4 #include <linux/module.h>
5 #include <linux/notifier.h>
7 #include <linux/platform_device.h>
8 #include <linux/reboot.h>
9 #include <linux/regmap.h>
11 #include <linux/mfd/88pm886.h>
13 static const struct regmap_config pm886_regmap_config
= {
16 .max_register
= PM886_REG_RTC_SPARE6
,
19 static struct regmap_irq pm886_regmap_irqs
[] = {
20 REGMAP_IRQ_REG(PM886_IRQ_ONKEY
, 0, PM886_INT_ENA1_ONKEY
),
23 static struct regmap_irq_chip pm886_regmap_irq_chip
= {
25 .irqs
= pm886_regmap_irqs
,
26 .num_irqs
= ARRAY_SIZE(pm886_regmap_irqs
),
28 .status_base
= PM886_REG_INT_STATUS1
,
29 .ack_base
= PM886_REG_INT_STATUS1
,
30 .unmask_base
= PM886_REG_INT_ENA_1
,
33 static struct resource pm886_onkey_resources
[] = {
34 DEFINE_RES_IRQ_NAMED(PM886_IRQ_ONKEY
, "88pm886-onkey"),
37 static struct mfd_cell pm886_devs
[] = {
38 MFD_CELL_RES("88pm886-onkey", pm886_onkey_resources
),
39 MFD_CELL_NAME("88pm886-regulator"),
40 MFD_CELL_NAME("88pm886-rtc"),
43 static int pm886_power_off_handler(struct sys_off_data
*sys_off_data
)
45 struct pm886_chip
*chip
= sys_off_data
->cb_data
;
46 struct regmap
*regmap
= chip
->regmap
;
47 struct device
*dev
= &chip
->client
->dev
;
50 err
= regmap_update_bits(regmap
, PM886_REG_MISC_CONFIG1
, PM886_SW_PDOWN
, PM886_SW_PDOWN
);
52 dev_err(dev
, "Failed to power off the device: %d\n", err
);
58 static int pm886_setup_irq(struct pm886_chip
*chip
,
59 struct regmap_irq_chip_data
**irq_data
)
61 struct regmap
*regmap
= chip
->regmap
;
62 struct device
*dev
= &chip
->client
->dev
;
65 /* Set interrupt clearing mode to clear on write. */
66 err
= regmap_update_bits(regmap
, PM886_REG_MISC_CONFIG2
,
67 PM886_INT_INV
| PM886_INT_CLEAR
| PM886_INT_MASK_MODE
,
70 dev_err(dev
, "Failed to set interrupt clearing mode: %d\n", err
);
74 err
= devm_regmap_add_irq_chip(dev
, regmap
, chip
->client
->irq
,
75 IRQF_ONESHOT
, 0, &pm886_regmap_irq_chip
,
78 dev_err(dev
, "Failed to request IRQ: %d\n", err
);
85 static int pm886_probe(struct i2c_client
*client
)
87 struct regmap_irq_chip_data
*irq_data
;
88 struct device
*dev
= &client
->dev
;
89 struct pm886_chip
*chip
;
90 struct regmap
*regmap
;
94 chip
= devm_kzalloc(dev
, sizeof(*chip
), GFP_KERNEL
);
98 chip
->client
= client
;
99 chip
->chip_id
= (uintptr_t)device_get_match_data(dev
);
100 i2c_set_clientdata(client
, chip
);
102 regmap
= devm_regmap_init_i2c(client
, &pm886_regmap_config
);
104 return dev_err_probe(dev
, PTR_ERR(regmap
), "Failed to initialize regmap\n");
105 chip
->regmap
= regmap
;
107 err
= regmap_read(regmap
, PM886_REG_ID
, &chip_id
);
109 return dev_err_probe(dev
, err
, "Failed to read chip ID\n");
111 if (chip
->chip_id
!= chip_id
)
112 return dev_err_probe(dev
, -EINVAL
, "Unsupported chip: 0x%x\n", chip_id
);
114 err
= pm886_setup_irq(chip
, &irq_data
);
118 err
= devm_mfd_add_devices(dev
, PLATFORM_DEVID_NONE
, pm886_devs
, ARRAY_SIZE(pm886_devs
),
119 NULL
, 0, regmap_irq_get_domain(irq_data
));
121 return dev_err_probe(dev
, err
, "Failed to add devices\n");
123 err
= devm_register_power_off_handler(dev
, pm886_power_off_handler
, chip
);
125 return dev_err_probe(dev
, err
, "Failed to register power off handler\n");
127 device_init_wakeup(dev
, device_property_read_bool(dev
, "wakeup-source"));
132 static const struct of_device_id pm886_of_match
[] = {
133 { .compatible
= "marvell,88pm886-a1", .data
= (void *)PM886_A1_CHIP_ID
},
136 MODULE_DEVICE_TABLE(of
, pm886_of_match
);
138 static struct i2c_driver pm886_i2c_driver
= {
141 .of_match_table
= pm886_of_match
,
143 .probe
= pm886_probe
,
145 module_i2c_driver(pm886_i2c_driver
);
147 MODULE_DESCRIPTION("Marvell 88PM886 PMIC driver");
148 MODULE_AUTHOR("Karel Balej <balejk@matfyz.cz>");
149 MODULE_LICENSE("GPL");