1 // SPDX-License-Identifier: GPL-2.0+
3 // MFD core driver for the Maxim MAX77843
5 // Copyright (C) 2015 Samsung Electronics
6 // Author: Jaewon Kim <jaewon02.kim@samsung.com>
7 // Author: Beomho Seo <beomho.seo@samsung.com>
10 #include <linux/i2c.h>
11 #include <linux/init.h>
12 #include <linux/interrupt.h>
13 #include <linux/mfd/core.h>
14 #include <linux/mfd/max77693-common.h>
15 #include <linux/mfd/max77843-private.h>
16 #include <linux/of_device.h>
17 #include <linux/platform_device.h>
19 static const struct mfd_cell max77843_devs
[] = {
21 .name
= "max77843-muic",
22 .of_compatible
= "maxim,max77843-muic",
24 .name
= "max77843-regulator",
25 .of_compatible
= "maxim,max77843-regulator",
27 .name
= "max77843-charger",
28 .of_compatible
= "maxim,max77843-charger"
30 .name
= "max77843-fuelgauge",
31 .of_compatible
= "maxim,max77843-fuelgauge",
33 .name
= "max77843-haptic",
34 .of_compatible
= "maxim,max77843-haptic",
38 static const struct regmap_config max77843_charger_regmap_config
= {
41 .max_register
= MAX77843_CHG_REG_END
,
44 static const struct regmap_config max77843_regmap_config
= {
47 .max_register
= MAX77843_SYS_REG_END
,
50 static const struct regmap_irq max77843_irqs
[] = {
51 /* TOPSYS interrupts */
52 { .reg_offset
= 0, .mask
= MAX77843_SYS_IRQ_SYSUVLO_INT
, },
53 { .reg_offset
= 0, .mask
= MAX77843_SYS_IRQ_SYSOVLO_INT
, },
54 { .reg_offset
= 0, .mask
= MAX77843_SYS_IRQ_TSHDN_INT
, },
55 { .reg_offset
= 0, .mask
= MAX77843_SYS_IRQ_TM_INT
, },
58 static const struct regmap_irq_chip max77843_irq_chip
= {
60 .status_base
= MAX77843_SYS_REG_SYSINTSRC
,
61 .mask_base
= MAX77843_SYS_REG_SYSINTMASK
,
64 .irqs
= max77843_irqs
,
65 .num_irqs
= ARRAY_SIZE(max77843_irqs
),
68 /* Charger and Charger regulator use same regmap. */
69 static int max77843_chg_init(struct max77693_dev
*max77843
)
73 max77843
->i2c_chg
= i2c_new_dummy(max77843
->i2c
->adapter
, I2C_ADDR_CHG
);
74 if (!max77843
->i2c_chg
) {
75 dev_err(&max77843
->i2c
->dev
,
76 "Cannot allocate I2C device for Charger\n");
79 i2c_set_clientdata(max77843
->i2c_chg
, max77843
);
81 max77843
->regmap_chg
= devm_regmap_init_i2c(max77843
->i2c_chg
,
82 &max77843_charger_regmap_config
);
83 if (IS_ERR(max77843
->regmap_chg
)) {
84 ret
= PTR_ERR(max77843
->regmap_chg
);
91 i2c_unregister_device(max77843
->i2c_chg
);
96 static int max77843_probe(struct i2c_client
*i2c
,
97 const struct i2c_device_id
*id
)
99 struct max77693_dev
*max77843
;
100 unsigned int reg_data
;
103 max77843
= devm_kzalloc(&i2c
->dev
, sizeof(*max77843
), GFP_KERNEL
);
107 i2c_set_clientdata(i2c
, max77843
);
108 max77843
->dev
= &i2c
->dev
;
110 max77843
->irq
= i2c
->irq
;
111 max77843
->type
= id
->driver_data
;
113 max77843
->regmap
= devm_regmap_init_i2c(i2c
,
114 &max77843_regmap_config
);
115 if (IS_ERR(max77843
->regmap
)) {
116 dev_err(&i2c
->dev
, "Failed to allocate topsys register map\n");
117 return PTR_ERR(max77843
->regmap
);
120 ret
= regmap_add_irq_chip(max77843
->regmap
, max77843
->irq
,
121 IRQF_TRIGGER_LOW
| IRQF_ONESHOT
| IRQF_SHARED
,
122 0, &max77843_irq_chip
, &max77843
->irq_data_topsys
);
124 dev_err(&i2c
->dev
, "Failed to add TOPSYS IRQ chip\n");
128 ret
= regmap_read(max77843
->regmap
,
129 MAX77843_SYS_REG_PMICID
, ®_data
);
131 dev_err(&i2c
->dev
, "Failed to read PMIC ID\n");
134 dev_info(&i2c
->dev
, "device ID: 0x%x\n", reg_data
);
136 ret
= max77843_chg_init(max77843
);
138 dev_err(&i2c
->dev
, "Failed to init Charger\n");
142 ret
= regmap_update_bits(max77843
->regmap
,
143 MAX77843_SYS_REG_INTSRCMASK
,
144 MAX77843_INTSRC_MASK_MASK
,
145 (unsigned int)~MAX77843_INTSRC_MASK_MASK
);
147 dev_err(&i2c
->dev
, "Failed to unmask interrupt source\n");
151 ret
= mfd_add_devices(max77843
->dev
, -1, max77843_devs
,
152 ARRAY_SIZE(max77843_devs
), NULL
, 0, NULL
);
154 dev_err(&i2c
->dev
, "Failed to add mfd device\n");
158 device_init_wakeup(max77843
->dev
, true);
163 regmap_del_irq_chip(max77843
->irq
, max77843
->irq_data_topsys
);
168 static const struct of_device_id max77843_dt_match
[] = {
169 { .compatible
= "maxim,max77843", },
173 static const struct i2c_device_id max77843_id
[] = {
174 { "max77843", TYPE_MAX77843
, },
178 static int __maybe_unused
max77843_suspend(struct device
*dev
)
180 struct i2c_client
*i2c
= to_i2c_client(dev
);
181 struct max77693_dev
*max77843
= i2c_get_clientdata(i2c
);
183 disable_irq(max77843
->irq
);
184 if (device_may_wakeup(dev
))
185 enable_irq_wake(max77843
->irq
);
190 static int __maybe_unused
max77843_resume(struct device
*dev
)
192 struct i2c_client
*i2c
= to_i2c_client(dev
);
193 struct max77693_dev
*max77843
= i2c_get_clientdata(i2c
);
195 if (device_may_wakeup(dev
))
196 disable_irq_wake(max77843
->irq
);
197 enable_irq(max77843
->irq
);
202 static SIMPLE_DEV_PM_OPS(max77843_pm
, max77843_suspend
, max77843_resume
);
204 static struct i2c_driver max77843_i2c_driver
= {
208 .of_match_table
= max77843_dt_match
,
209 .suppress_bind_attrs
= true,
211 .probe
= max77843_probe
,
212 .id_table
= max77843_id
,
215 static int __init
max77843_i2c_init(void)
217 return i2c_add_driver(&max77843_i2c_driver
);
219 subsys_initcall(max77843_i2c_init
);