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,
63 .irqs = max77843_irqs,
64 .num_irqs = ARRAY_SIZE(max77843_irqs),
67 /* Charger and Charger regulator use same regmap. */
68 static int max77843_chg_init(struct max77693_dev *max77843)
72 max77843->i2c_chg = i2c_new_dummy_device(max77843->i2c->adapter, I2C_ADDR_CHG);
73 if (IS_ERR(max77843->i2c_chg)) {
74 dev_err(&max77843->i2c->dev,
75 "Cannot allocate I2C device for Charger\n");
76 return PTR_ERR(max77843->i2c_chg);
78 i2c_set_clientdata(max77843->i2c_chg, max77843);
80 max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg,
81 &max77843_charger_regmap_config);
82 if (IS_ERR(max77843->regmap_chg)) {
83 ret = PTR_ERR(max77843->regmap_chg);
90 i2c_unregister_device(max77843->i2c_chg);
95 static int max77843_probe(struct i2c_client *i2c)
97 const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
98 struct max77693_dev *max77843;
99 unsigned int reg_data;
102 max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL);
106 i2c_set_clientdata(i2c, max77843);
107 max77843->dev = &i2c->dev;
109 max77843->irq = i2c->irq;
110 max77843->type = id->driver_data;
112 max77843->regmap = devm_regmap_init_i2c(i2c,
113 &max77843_regmap_config);
114 if (IS_ERR(max77843->regmap)) {
115 dev_err(&i2c->dev, "Failed to allocate topsys register map\n");
116 return PTR_ERR(max77843->regmap);
119 ret = regmap_add_irq_chip(max77843->regmap, max77843->irq,
120 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
121 0, &max77843_irq_chip, &max77843->irq_data_topsys);
123 dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n");
127 ret = regmap_read(max77843->regmap,
128 MAX77843_SYS_REG_PMICID, ®_data);
130 dev_err(&i2c->dev, "Failed to read PMIC ID\n");
133 dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data);
135 ret = max77843_chg_init(max77843);
137 dev_err(&i2c->dev, "Failed to init Charger\n");
141 ret = regmap_update_bits(max77843->regmap,
142 MAX77843_SYS_REG_INTSRCMASK,
143 MAX77843_INTSRC_MASK_MASK,
144 (unsigned int)~MAX77843_INTSRC_MASK_MASK);
146 dev_err(&i2c->dev, "Failed to unmask interrupt source\n");
150 ret = mfd_add_devices(max77843->dev, -1, max77843_devs,
151 ARRAY_SIZE(max77843_devs), NULL, 0, NULL);
153 dev_err(&i2c->dev, "Failed to add mfd device\n");
157 device_init_wakeup(max77843->dev, true);
162 regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys);
167 static const struct of_device_id max77843_dt_match[] = {
168 { .compatible = "maxim,max77843", },
172 static const struct i2c_device_id max77843_id[] = {
173 { "max77843", TYPE_MAX77843, },
177 static int __maybe_unused max77843_suspend(struct device *dev)
179 struct i2c_client *i2c = to_i2c_client(dev);
180 struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
182 disable_irq(max77843->irq);
183 if (device_may_wakeup(dev))
184 enable_irq_wake(max77843->irq);
189 static int __maybe_unused max77843_resume(struct device *dev)
191 struct i2c_client *i2c = to_i2c_client(dev);
192 struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
194 if (device_may_wakeup(dev))
195 disable_irq_wake(max77843->irq);
196 enable_irq(max77843->irq);
201 static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume);
203 static struct i2c_driver max77843_i2c_driver = {
207 .of_match_table = max77843_dt_match,
208 .suppress_bind_attrs = true,
210 .probe = max77843_probe,
211 .id_table = max77843_id,
214 static int __init max77843_i2c_init(void)
216 return i2c_add_driver(&max77843_i2c_driver);
218 subsys_initcall(max77843_i2c_init);