Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) // max8998.c - mfd core driver for the Maxim 8998
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) //  Copyright (C) 2009-2010 Samsung Electronics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) //  Kyungmin Park <kyungmin.park@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) //  Marek Szyprowski <m.szyprowski@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/of_irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/mfd/max8998.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/mfd/max8998-private.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define RTC_I2C_ADDR		(0x0c >> 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) static const struct mfd_cell max8998_devs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 		.name = "max8998-pmic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	}, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 		.name = "max8998-rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	}, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 		.name = "max8998-battery",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) static const struct mfd_cell lp3974_devs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 		.name = "lp3974-pmic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	}, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		.name = "lp3974-rtc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) int max8998_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	mutex_lock(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	ret = i2c_smbus_read_byte_data(i2c, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	mutex_unlock(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	ret &= 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	*dest = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) EXPORT_SYMBOL(max8998_read_reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) int max8998_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	mutex_lock(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	mutex_unlock(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) EXPORT_SYMBOL(max8998_bulk_read);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	mutex_lock(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	ret = i2c_smbus_write_byte_data(i2c, reg, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	mutex_unlock(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) EXPORT_SYMBOL(max8998_write_reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) int max8998_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	mutex_lock(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	mutex_unlock(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) EXPORT_SYMBOL(max8998_bulk_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	mutex_lock(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	ret = i2c_smbus_read_byte_data(i2c, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	if (ret >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		u8 old_val = ret & 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 		u8 new_val = (val & mask) | (old_val & (~mask));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	mutex_unlock(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) EXPORT_SYMBOL(max8998_update_reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static const struct of_device_id max8998_dt_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	{ .compatible = "maxim,max8998", .data = (void *)TYPE_MAX8998 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	{ .compatible = "national,lp3974", .data = (void *)TYPE_LP3974 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	{ .compatible = "ti,lp3974", .data = (void *)TYPE_LP3974 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)  * Only the common platform data elements for max8998 are parsed here from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)  * device tree. Other sub-modules of max8998 such as pmic, rtc and others have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)  * to parse their own platform data elements from device tree.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)  * The max8998 platform data structure is instantiated here and the drivers for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)  * the sub-modules need not instantiate another instance while parsing their
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)  * platform data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static struct max8998_platform_data *max8998_i2c_parse_dt_pdata(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 							struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	struct max8998_platform_data *pd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	if (!pd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	pd->ono = irq_of_parse_and_map(dev->of_node, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	 * ToDo: the 'wakeup' member in the platform data is more of a linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	 * specfic information. Hence, there is no binding for that yet and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	 * not parsed here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	return pd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) static inline unsigned long max8998_i2c_get_driver_data(struct i2c_client *i2c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 						const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		const struct of_device_id *match;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		match = of_match_node(max8998_dt_match, i2c->dev.of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		return (unsigned long)match->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	return id->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) static int max8998_i2c_probe(struct i2c_client *i2c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 			    const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	struct max8998_platform_data *pdata = dev_get_platdata(&i2c->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	struct max8998_dev *max8998;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	max8998 = devm_kzalloc(&i2c->dev, sizeof(struct max8998_dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 				GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	if (max8998 == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		pdata = max8998_i2c_parse_dt_pdata(&i2c->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		if (IS_ERR(pdata))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			return PTR_ERR(pdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	i2c_set_clientdata(i2c, max8998);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	max8998->dev = &i2c->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	max8998->i2c = i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	max8998->irq = i2c->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	max8998->type = max8998_i2c_get_driver_data(i2c, id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	max8998->pdata = pdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	if (pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		max8998->ono = pdata->ono;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		max8998->irq_base = pdata->irq_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		max8998->wakeup = pdata->wakeup;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	mutex_init(&max8998->iolock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	max8998->rtc = i2c_new_dummy_device(i2c->adapter, RTC_I2C_ADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	if (IS_ERR(max8998->rtc)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		dev_err(&i2c->dev, "Failed to allocate I2C device for RTC\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		return PTR_ERR(max8998->rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	i2c_set_clientdata(max8998->rtc, max8998);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	max8998_irq_init(max8998);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	pm_runtime_set_active(max8998->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	switch (max8998->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	case TYPE_LP3974:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		ret = mfd_add_devices(max8998->dev, -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 				      lp3974_devs, ARRAY_SIZE(lp3974_devs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 				      NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	case TYPE_MAX8998:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		ret = mfd_add_devices(max8998->dev, -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 				      max8998_devs, ARRAY_SIZE(max8998_devs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 				      NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	device_init_wakeup(max8998->dev, max8998->wakeup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	mfd_remove_devices(max8998->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	max8998_irq_exit(max8998);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	i2c_unregister_device(max8998->rtc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static const struct i2c_device_id max8998_i2c_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	{ "max8998", TYPE_MAX8998 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	{ "lp3974", TYPE_LP3974},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) static int max8998_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	struct i2c_client *i2c = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		irq_set_irq_wake(max8998->irq, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) static int max8998_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	struct i2c_client *i2c = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		irq_set_irq_wake(max8998->irq, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	 * In LP3974, if IRQ registers are not "read & clear"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	 * when it's set during sleep, the interrupt becomes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	 * disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	return max8998_irq_resume(i2c_get_clientdata(i2c));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) struct max8998_reg_dump {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	u8	addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	u8	val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #define SAVE_ITEM(x)	{ .addr = (x), .val = 0x0, }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) static struct max8998_reg_dump max8998_dump[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	SAVE_ITEM(MAX8998_REG_IRQM1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	SAVE_ITEM(MAX8998_REG_IRQM2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	SAVE_ITEM(MAX8998_REG_IRQM3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	SAVE_ITEM(MAX8998_REG_IRQM4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	SAVE_ITEM(MAX8998_REG_STATUSM1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	SAVE_ITEM(MAX8998_REG_STATUSM2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	SAVE_ITEM(MAX8998_REG_CHGR1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	SAVE_ITEM(MAX8998_REG_CHGR2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	SAVE_ITEM(MAX8998_REG_ONOFF1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	SAVE_ITEM(MAX8998_REG_ONOFF2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	SAVE_ITEM(MAX8998_REG_ONOFF3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	SAVE_ITEM(MAX8998_REG_ONOFF4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	SAVE_ITEM(MAX8998_REG_LDO2_LDO3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	SAVE_ITEM(MAX8998_REG_LDO4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	SAVE_ITEM(MAX8998_REG_LDO5),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	SAVE_ITEM(MAX8998_REG_LDO6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	SAVE_ITEM(MAX8998_REG_LDO7),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	SAVE_ITEM(MAX8998_REG_LDO8_LDO9),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	SAVE_ITEM(MAX8998_REG_LDO10_LDO11),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	SAVE_ITEM(MAX8998_REG_LDO12),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	SAVE_ITEM(MAX8998_REG_LDO13),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	SAVE_ITEM(MAX8998_REG_LDO14),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	SAVE_ITEM(MAX8998_REG_LDO15),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	SAVE_ITEM(MAX8998_REG_LDO16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	SAVE_ITEM(MAX8998_REG_LDO17),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	SAVE_ITEM(MAX8998_REG_BKCHR),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	SAVE_ITEM(MAX8998_REG_LBCNFG1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	SAVE_ITEM(MAX8998_REG_LBCNFG2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) /* Save registers before hibernation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) static int max8998_freeze(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	struct i2c_client *i2c = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 		max8998_read_reg(i2c, max8998_dump[i].addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 				&max8998_dump[i].val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) /* Restore registers after hibernation */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) static int max8998_restore(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	struct i2c_client *i2c = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	for (i = 0; i < ARRAY_SIZE(max8998_dump); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 		max8998_write_reg(i2c, max8998_dump[i].addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 				max8998_dump[i].val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) static const struct dev_pm_ops max8998_pm = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	.suspend = max8998_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	.resume = max8998_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	.freeze = max8998_freeze,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	.restore = max8998_restore,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) static struct i2c_driver max8998_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		   .name = "max8998",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		   .pm = &max8998_pm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		   .suppress_bind_attrs = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 		   .of_match_table = of_match_ptr(max8998_dt_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	.probe = max8998_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	.id_table = max8998_i2c_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) static int __init max8998_i2c_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	return i2c_add_driver(&max8998_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) /* init early so consumer devices can complete system boot */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) subsys_initcall(max8998_i2c_init);