1 // SPDX-License-Identifier: GPL-2.0-only
3  * max8907.c - mfd driver for MAX8907
5  * Copyright (C) 2010 Gyungoh Yoo <jack.yoo@maxim-ic.com>
6  * Copyright (C) 2010-2012, NVIDIA CORPORATION. All rights reserved.
23 	{ .name = "max8907-regulator", },
24 	{ .name = "max8907-rtc", },
27 static bool max8907_gen_is_volatile_reg(struct device *dev, unsigned int reg)  in max8907_gen_is_volatile_reg()
42 static bool max8907_gen_is_precious_reg(struct device *dev, unsigned int reg)  in max8907_gen_is_precious_reg()
55 static bool max8907_gen_is_writeable_reg(struct device *dev, unsigned int reg)  in max8907_gen_is_writeable_reg()
70 static bool max8907_rtc_is_volatile_reg(struct device *dev, unsigned int reg)  in max8907_rtc_is_volatile_reg()
84 static bool max8907_rtc_is_precious_reg(struct device *dev, unsigned int reg)  in max8907_rtc_is_precious_reg()
94 static bool max8907_rtc_is_writeable_reg(struct device *dev, unsigned int reg)  in max8907_rtc_is_writeable_reg()
130 	.name = "max8907 chg",
134 	.irq_reg_stride = MAX8907_REG_CHG_IRQ2 - MAX8907_REG_CHG_IRQ1,
157 	.irq_reg_stride = MAX8907_REG_ON_OFF_IRQ2 - MAX8907_REG_ON_OFF_IRQ1,
180 	regmap_update_bits(max8907_pm_off->regmap_gen, MAX8907_REG_RESET_CNFG,  in max8907_power_off()
184 static int max8907_i2c_probe(struct i2c_client *i2c,  in max8907_i2c_probe()
188 	int ret;  in max8907_i2c_probe()
189 	struct max8907_platform_data *pdata = dev_get_platdata(&i2c->dev);  in max8907_i2c_probe()
193 		pm_off = pdata->pm_off;  in max8907_i2c_probe()
194 	else if (i2c->dev.of_node)  in max8907_i2c_probe()
195 		pm_off = of_property_read_bool(i2c->dev.of_node,  in max8907_i2c_probe()
196 					"maxim,system-power-controller");  in max8907_i2c_probe()
198 	max8907 = devm_kzalloc(&i2c->dev, sizeof(struct max8907), GFP_KERNEL);  in max8907_i2c_probe()
200 		ret = -ENOMEM;  in max8907_i2c_probe()
204 	max8907->dev = &i2c->dev;  in max8907_i2c_probe()
205 	dev_set_drvdata(max8907->dev, max8907);  in max8907_i2c_probe()
207 	max8907->i2c_gen = i2c;  in max8907_i2c_probe()
209 	max8907->regmap_gen = devm_regmap_init_i2c(i2c,  in max8907_i2c_probe()
211 	if (IS_ERR(max8907->regmap_gen)) {  in max8907_i2c_probe()
212 		ret = PTR_ERR(max8907->regmap_gen);  in max8907_i2c_probe()
213 		dev_err(&i2c->dev, "gen regmap init failed: %d\n", ret);  in max8907_i2c_probe()
217 	max8907->i2c_rtc = i2c_new_dummy_device(i2c->adapter, MAX8907_RTC_I2C_ADDR);  in max8907_i2c_probe()
218 	if (IS_ERR(max8907->i2c_rtc)) {  in max8907_i2c_probe()
219 		ret = PTR_ERR(max8907->i2c_rtc);  in max8907_i2c_probe()
222 	i2c_set_clientdata(max8907->i2c_rtc, max8907);  in max8907_i2c_probe()
223 	max8907->regmap_rtc = devm_regmap_init_i2c(max8907->i2c_rtc,  in max8907_i2c_probe()
225 	if (IS_ERR(max8907->regmap_rtc)) {  in max8907_i2c_probe()
226 		ret = PTR_ERR(max8907->regmap_rtc);  in max8907_i2c_probe()
227 		dev_err(&i2c->dev, "rtc regmap init failed: %d\n", ret);  in max8907_i2c_probe()
231 	irq_set_status_flags(max8907->i2c_gen->irq, IRQ_NOAUTOEN);  in max8907_i2c_probe()
233 	ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,  in max8907_i2c_probe()
234 				  IRQF_ONESHOT | IRQF_SHARED, -1,  in max8907_i2c_probe()
236 				  &max8907->irqc_chg);  in max8907_i2c_probe()
238 		dev_err(&i2c->dev, "failed to add chg irq chip: %d\n", ret);  in max8907_i2c_probe()
241 	ret = regmap_add_irq_chip(max8907->regmap_gen, max8907->i2c_gen->irq,  in max8907_i2c_probe()
242 				  IRQF_ONESHOT | IRQF_SHARED, -1,  in max8907_i2c_probe()
244 				  &max8907->irqc_on_off);  in max8907_i2c_probe()
246 		dev_err(&i2c->dev, "failed to add on off irq chip: %d\n", ret);  in max8907_i2c_probe()
249 	ret = regmap_add_irq_chip(max8907->regmap_rtc, max8907->i2c_gen->irq,  in max8907_i2c_probe()
250 				  IRQF_ONESHOT | IRQF_SHARED, -1,  in max8907_i2c_probe()
252 				  &max8907->irqc_rtc);  in max8907_i2c_probe()
254 		dev_err(&i2c->dev, "failed to add rtc irq chip: %d\n", ret);  in max8907_i2c_probe()
258 	enable_irq(max8907->i2c_gen->irq);  in max8907_i2c_probe()
260 	ret = mfd_add_devices(max8907->dev, -1, max8907_cells,  in max8907_i2c_probe()
263 		dev_err(&i2c->dev, "failed to add MFD devices %d\n", ret);  in max8907_i2c_probe()
275 	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);  in max8907_i2c_probe()
277 	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);  in max8907_i2c_probe()
279 	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);  in max8907_i2c_probe()
282 	i2c_unregister_device(max8907->i2c_rtc);  in max8907_i2c_probe()
289 static int max8907_i2c_remove(struct i2c_client *i2c)  in max8907_i2c_remove()
293 	mfd_remove_devices(max8907->dev);  in max8907_i2c_remove()
295 	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_rtc);  in max8907_i2c_remove()
296 	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_on_off);  in max8907_i2c_remove()
297 	regmap_del_irq_chip(max8907->i2c_gen->irq, max8907->irqc_chg);  in max8907_i2c_remove()
299 	i2c_unregister_device(max8907->i2c_rtc);  in max8907_i2c_remove()
328 static int __init max8907_i2c_init(void)  in max8907_i2c_init()
330 	int ret = -ENODEV;  in max8907_i2c_init()
346 MODULE_DESCRIPTION("MAX8907 multi-function core driver");
347 MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@maxim-ic.com>");