1 // SPDX-License-Identifier: GPL-2.0+
3 // max8998.c - mfd core driver for the Maxim 8998
5 //  Copyright (C) 2009-2010 Samsung Electronics
6 //  Kyungmin Park <kyungmin.park@samsung.com>
7 //  Marek Szyprowski <m.szyprowski@samsung.com>
20 #include <linux/mfd/max8998-private.h>
26 		.name = "max8998-pmic",
28 		.name = "max8998-rtc",
30 		.name = "max8998-battery",
36 		.name = "lp3974-pmic",
38 		.name = "lp3974-rtc",
47 	mutex_lock(&max8998->iolock);  in max8998_read_reg()
49 	mutex_unlock(&max8998->iolock);  in max8998_read_reg()
64 	mutex_lock(&max8998->iolock);  in max8998_bulk_read()
66 	mutex_unlock(&max8998->iolock);  in max8998_bulk_read()
79 	mutex_lock(&max8998->iolock);  in max8998_write_reg()
81 	mutex_unlock(&max8998->iolock);  in max8998_write_reg()
91 	mutex_lock(&max8998->iolock);  in max8998_bulk_write()
93 	mutex_unlock(&max8998->iolock);  in max8998_bulk_write()
106 	mutex_lock(&max8998->iolock);  in max8998_update_reg()
113 	mutex_unlock(&max8998->iolock);  in max8998_update_reg()
129  * device tree. Other sub-modules of max8998 such as pmic, rtc and others have
133  * the sub-modules need not instantiate another instance while parsing their
139 	struct max8998_platform_data *pd;  in max8998_i2c_parse_dt_pdata()  local
141 	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);  in max8998_i2c_parse_dt_pdata()
142 	if (!pd)  in max8998_i2c_parse_dt_pdata()
143 		return ERR_PTR(-ENOMEM);  in max8998_i2c_parse_dt_pdata()
145 	pd->ono = irq_of_parse_and_map(dev->of_node, 1);  in max8998_i2c_parse_dt_pdata()
152 	return pd;  in max8998_i2c_parse_dt_pdata()
158 	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {  in max8998_i2c_get_driver_data()
160 		match = of_match_node(max8998_dt_match, i2c->dev.of_node);  in max8998_i2c_get_driver_data()
161 		return (unsigned long)match->data;  in max8998_i2c_get_driver_data()
164 	return id->driver_data;  in max8998_i2c_get_driver_data()
170 	struct max8998_platform_data *pdata = dev_get_platdata(&i2c->dev);  in max8998_i2c_probe()
174 	max8998 = devm_kzalloc(&i2c->dev, sizeof(struct max8998_dev),  in max8998_i2c_probe()
177 		return -ENOMEM;  in max8998_i2c_probe()
179 	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {  in max8998_i2c_probe()
180 		pdata = max8998_i2c_parse_dt_pdata(&i2c->dev);  in max8998_i2c_probe()
186 	max8998->dev = &i2c->dev;  in max8998_i2c_probe()
187 	max8998->i2c = i2c;  in max8998_i2c_probe()
188 	max8998->irq = i2c->irq;  in max8998_i2c_probe()
189 	max8998->type = max8998_i2c_get_driver_data(i2c, id);  in max8998_i2c_probe()
190 	max8998->pdata = pdata;  in max8998_i2c_probe()
192 		max8998->ono = pdata->ono;  in max8998_i2c_probe()
193 		max8998->irq_base = pdata->irq_base;  in max8998_i2c_probe()
194 		max8998->wakeup = pdata->wakeup;  in max8998_i2c_probe()
196 	mutex_init(&max8998->iolock);  in max8998_i2c_probe()
198 	max8998->rtc = i2c_new_dummy_device(i2c->adapter, RTC_I2C_ADDR);  in max8998_i2c_probe()
199 	if (IS_ERR(max8998->rtc)) {  in max8998_i2c_probe()
200 		dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");  in max8998_i2c_probe()
201 		return PTR_ERR(max8998->rtc);  in max8998_i2c_probe()
203 	i2c_set_clientdata(max8998->rtc, max8998);  in max8998_i2c_probe()
207 	pm_runtime_set_active(max8998->dev);  in max8998_i2c_probe()
209 	switch (max8998->type) {  in max8998_i2c_probe()
211 		ret = mfd_add_devices(max8998->dev, -1,  in max8998_i2c_probe()
216 		ret = mfd_add_devices(max8998->dev, -1,  in max8998_i2c_probe()
221 		ret = -EINVAL;  in max8998_i2c_probe()
227 	device_init_wakeup(max8998->dev, max8998->wakeup);  in max8998_i2c_probe()
232 	mfd_remove_devices(max8998->dev);  in max8998_i2c_probe()
234 	i2c_unregister_device(max8998->rtc);  in max8998_i2c_probe()
250 		irq_set_irq_wake(max8998->irq, 1);  in max8998_suspend()
260 		irq_set_irq_wake(max8998->irq, 0);  in max8998_resume()