[linux-2.6-block.git] / drivers / mfd / rsmu_i2c.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * I2C driver for Renesas Synchronization Management Unit (SMU) devices.
 *
 * Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.
 */

#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mfd/core.h>
#include <linux/mfd/rsmu.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/slab.h>

#include "rsmu.h"

/*
 * 32-bit register address: the lower 8 bits of the register address come
 * from the offset addr byte and the upper 24 bits come from the page register.
 */
#define	RSMU_CM_PAGE_ADDR		0xFC
#define RSMU_CM_PAGE_MASK		0xFFFFFF00
#define RSMU_CM_ADDRESS_MASK		0x000000FF

/*
 * 15-bit register address: the lower 7 bits of the register address come
 * from the offset addr byte and the upper 8 bits come from the page register.
 */
#define	RSMU_SABRE_PAGE_ADDR		0x7F
#define	RSMU_SABRE_PAGE_WINDOW		128

typedef int (*rsmu_rw_device)(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes);

static const struct regmap_range_cfg rsmu_sabre_range_cfg[] = {
	{
		.range_min = 0,
		.range_max = 0x400,
		.selector_reg = RSMU_SABRE_PAGE_ADDR,
		.selector_mask = 0xFF,
		.selector_shift = 0,
		.window_start = 0,
		.window_len = RSMU_SABRE_PAGE_WINDOW,
	}
};

static bool rsmu_sabre_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case RSMU_SABRE_PAGE_ADDR:
		return false;
	default:
		return true;
	}
}

static int rsmu_smbus_i2c_write_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes)
{
	struct i2c_client *client = to_i2c_client(rsmu->dev);

	return i2c_smbus_write_i2c_block_data(client, reg, bytes, buf);
}

static int rsmu_smbus_i2c_read_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes)
{
	struct i2c_client *client = to_i2c_client(rsmu->dev);
	int ret;

	ret = i2c_smbus_read_i2c_block_data(client, reg, bytes, buf);
	if (ret == bytes)
		return 0;
	else if (ret < 0)
		return ret;
	else
		return -EIO;
}

static int rsmu_i2c_read_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes)
{
	struct i2c_client *client = to_i2c_client(rsmu->dev);
	struct i2c_msg msg[2];
	int cnt;

	msg[0].addr = client->addr;
	msg[0].flags = 0;
	msg[0].len = 1;
	msg[0].buf = &reg;

	msg[1].addr = client->addr;
	msg[1].flags = I2C_M_RD;
	msg[1].len = bytes;
	msg[1].buf = buf;

	cnt = i2c_transfer(client->adapter, msg, 2);

	if (cnt < 0) {
		dev_err(rsmu->dev, "i2c_transfer failed at addr: %04x!", reg);
		return cnt;
	} else if (cnt != 2) {
		dev_err(rsmu->dev,
			"i2c_transfer sent only %d of 2 messages", cnt);
		return -EIO;
	}

	return 0;
}

static int rsmu_i2c_write_device(struct rsmu_ddata *rsmu, u8 reg, u8 *buf, u8 bytes)
{
	struct i2c_client *client = to_i2c_client(rsmu->dev);
	/* we add 1 byte for device register */
	u8 msg[RSMU_MAX_WRITE_COUNT + 1];
	int cnt;

	if (bytes > RSMU_MAX_WRITE_COUNT)
		return -EINVAL;

	msg[0] = reg;
	memcpy(&msg[1], buf, bytes);

	cnt = i2c_master_send(client, msg, bytes + 1);

	if (cnt < 0) {
		dev_err(&client->dev,
			"i2c_master_send failed at addr: %04x!", reg);
		return cnt;
	}

	return 0;
}

static int rsmu_write_page_register(struct rsmu_ddata *rsmu, u32 reg,
				    rsmu_rw_device rsmu_write_device)
{
	u32 page = reg & RSMU_CM_PAGE_MASK;
	u8 buf[4];
	int err;

	/* Do not modify offset register for none-scsr registers */
	if (reg < RSMU_CM_SCSR_BASE)
		return 0;

	/* Simply return if we are on the same page */
	if (rsmu->page == page)
		return 0;

	buf[0] = 0x0;
	buf[1] = (u8)((page >> 8) & 0xFF);
	buf[2] = (u8)((page >> 16) & 0xFF);
	buf[3] = (u8)((page >> 24) & 0xFF);

	err = rsmu_write_device(rsmu, RSMU_CM_PAGE_ADDR, buf, sizeof(buf));
	if (err)
		dev_err(rsmu->dev, "Failed to set page offset 0x%x\n", page);
	else
		/* Remember the last page */
		rsmu->page = page;

	return err;
}

static int rsmu_i2c_reg_read(void *context, unsigned int reg, unsigned int *val)
{
	struct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context);
	u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK);
	int err;

	err = rsmu_write_page_register(rsmu, reg, rsmu_i2c_write_device);
	if (err)
		return err;

	err = rsmu_i2c_read_device(rsmu, addr, (u8 *)val, 1);
	if (err)
		dev_err(rsmu->dev, "Failed to read offset address 0x%x\n", addr);

	return err;
}

static int rsmu_i2c_reg_write(void *context, unsigned int reg, unsigned int val)
{
	struct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context);
	u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK);
	u8 data = (u8)val;
	int err;

	err = rsmu_write_page_register(rsmu, reg, rsmu_i2c_write_device);
	if (err)
		return err;

	err = rsmu_i2c_write_device(rsmu, addr, &data, 1);
	if (err)
		dev_err(rsmu->dev,
			"Failed to write offset address 0x%x\n", addr);

	return err;
}

static int rsmu_smbus_i2c_reg_read(void *context, unsigned int reg, unsigned int *val)
{
	struct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context);
	u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK);
	int err;

	err = rsmu_write_page_register(rsmu, reg, rsmu_smbus_i2c_write_device);
	if (err)
		return err;

	err = rsmu_smbus_i2c_read_device(rsmu, addr, (u8 *)val, 1);
	if (err)
		dev_err(rsmu->dev, "Failed to read offset address 0x%x\n", addr);

	return err;
}

static int rsmu_smbus_i2c_reg_write(void *context, unsigned int reg, unsigned int val)
{
	struct rsmu_ddata *rsmu = i2c_get_clientdata((struct i2c_client *)context);
	u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK);
	u8 data = (u8)val;
	int err;

	err = rsmu_write_page_register(rsmu, reg, rsmu_smbus_i2c_write_device);
	if (err)
		return err;

	err = rsmu_smbus_i2c_write_device(rsmu, addr, &data, 1);
	if (err)
		dev_err(rsmu->dev,
			"Failed to write offset address 0x%x\n", addr);

	return err;
}

static const struct regmap_config rsmu_i2c_cm_regmap_config = {
	.reg_bits = 32,
	.val_bits = 8,
	.max_register = 0x20120000,
	.reg_read = rsmu_i2c_reg_read,
	.reg_write = rsmu_i2c_reg_write,
	.cache_type = REGCACHE_NONE,
};

static const struct regmap_config rsmu_smbus_i2c_cm_regmap_config = {
	.reg_bits = 32,
	.val_bits = 8,
	.max_register = 0x20120000,
	.reg_read = rsmu_smbus_i2c_reg_read,
	.reg_write = rsmu_smbus_i2c_reg_write,
	.cache_type = REGCACHE_NONE,
};

static const struct regmap_config rsmu_sabre_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.max_register = 0x400,
	.ranges = rsmu_sabre_range_cfg,
	.num_ranges = ARRAY_SIZE(rsmu_sabre_range_cfg),
	.volatile_reg = rsmu_sabre_volatile_reg,
	.cache_type = REGCACHE_MAPLE,
	.can_multi_write = true,
};

static const struct regmap_config rsmu_sl_regmap_config = {
	.reg_bits = 16,
	.val_bits = 8,
	.reg_format_endian = REGMAP_ENDIAN_BIG,
	.max_register = 0x340,
	.cache_type = REGCACHE_NONE,
	.can_multi_write = true,
};

static int rsmu_i2c_probe(struct i2c_client *client)
{
	const struct i2c_device_id *id = i2c_client_get_device_id(client);
	const struct regmap_config *cfg;
	struct rsmu_ddata *rsmu;
	int ret;

	rsmu = devm_kzalloc(&client->dev, sizeof(*rsmu), GFP_KERNEL);
	if (!rsmu)
		return -ENOMEM;

	i2c_set_clientdata(client, rsmu);

	rsmu->dev = &client->dev;
	rsmu->type = (enum rsmu_type)id->driver_data;

	switch (rsmu->type) {
	case RSMU_CM:
		if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
			cfg = &rsmu_i2c_cm_regmap_config;
		} else if (i2c_check_functionality(client->adapter,
						   I2C_FUNC_SMBUS_I2C_BLOCK)) {
			cfg = &rsmu_smbus_i2c_cm_regmap_config;
		} else {
			dev_err(rsmu->dev, "Unsupported i2c adapter\n");
			return -ENOTSUPP;
		}
		break;
	case RSMU_SABRE:
		cfg = &rsmu_sabre_regmap_config;
		break;
	case RSMU_SL:
		cfg = &rsmu_sl_regmap_config;
		break;
	default:
		dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type);
		return -ENODEV;
	}

	if (rsmu->type == RSMU_CM)
		rsmu->regmap = devm_regmap_init(&client->dev, NULL, client, cfg);
	else
		rsmu->regmap = devm_regmap_init_i2c(client, cfg);

	if (IS_ERR(rsmu->regmap)) {
		ret = PTR_ERR(rsmu->regmap);
		dev_err(rsmu->dev, "Failed to allocate register map: %d\n", ret);
		return ret;
	}

	return rsmu_core_init(rsmu);
}

static void rsmu_i2c_remove(struct i2c_client *client)
{
	struct rsmu_ddata *rsmu = i2c_get_clientdata(client);

	rsmu_core_exit(rsmu);
}

static const struct i2c_device_id rsmu_i2c_id[] = {
	{ "8a34000",  RSMU_CM },
	{ "8a34001",  RSMU_CM },
	{ "82p33810", RSMU_SABRE },
	{ "82p33811", RSMU_SABRE },
	{ "8v19n850", RSMU_SL },
	{ "8v19n851", RSMU_SL },
	{}
};
MODULE_DEVICE_TABLE(i2c, rsmu_i2c_id);

static const struct of_device_id rsmu_i2c_of_match[] = {
	{ .compatible = "idt,8a34000",  .data = (void *)RSMU_CM },
	{ .compatible = "idt,8a34001",  .data = (void *)RSMU_CM },
	{ .compatible = "idt,82p33810", .data = (void *)RSMU_SABRE },
	{ .compatible = "idt,82p33811", .data = (void *)RSMU_SABRE },
	{ .compatible = "idt,8v19n850", .data = (void *)RSMU_SL },
	{ .compatible = "idt,8v19n851", .data = (void *)RSMU_SL },
	{}
};
MODULE_DEVICE_TABLE(of, rsmu_i2c_of_match);

static struct i2c_driver rsmu_i2c_driver = {
	.driver = {
		.name = "rsmu-i2c",
		.of_match_table = rsmu_i2c_of_match,
	},
	.probe = rsmu_i2c_probe,
	.remove	= rsmu_i2c_remove,
	.id_table = rsmu_i2c_id,
};

static int __init rsmu_i2c_init(void)
{
	return i2c_add_driver(&rsmu_i2c_driver);
}
subsys_initcall(rsmu_i2c_init);

static void __exit rsmu_i2c_exit(void)
{
	i2c_del_driver(&rsmu_i2c_driver);
}
module_exit(rsmu_i2c_exit);

MODULE_DESCRIPTION("Renesas SMU I2C driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
a1867f85 ML	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* I2C driver for Renesas Synchronization Management Unit (SMU) devices.
	4	*
	5	* Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.
	6	*/
	7
	8	#include <linux/i2c.h>
	9	#include <linux/init.h>
	10	#include <linux/kernel.h>
	11	#include <linux/mfd/core.h>
	12	#include <linux/mfd/rsmu.h>
	13	#include <linux/module.h>
	14	#include <linux/of.h>
	15	#include <linux/regmap.h>
	16	#include <linux/slab.h>
	17
	18	#include "rsmu.h"
	19
	20	/*
67d6c76f ML	21	* 32-bit register address: the lower 8 bits of the register address come
67d6c76f ML	22	* from the offset addr byte and the upper 24 bits come from the page register.
a1867f85	23	*/
67d6c76f ML	24	#define RSMU_CM_PAGE_ADDR 0xFC
	25	#define RSMU_CM_PAGE_MASK 0xFFFFFF00
	26	#define RSMU_CM_ADDRESS_MASK 0x000000FF
a1867f85 ML	27
	28	/*
	29	* 15-bit register address: the lower 7 bits of the register address come
	30	* from the offset addr byte and the upper 8 bits come from the page register.
	31	*/
	32	#define RSMU_SABRE_PAGE_ADDR 0x7F
	33	#define RSMU_SABRE_PAGE_WINDOW 128
	34
53d3ff7b ML	35	typedef int (rsmu_rw_device)(struct rsmu_ddata rsmu, u8 reg, u8 *buf, u8 bytes);
53d3ff7b ML	36
a1867f85 ML	37	static const struct regmap_range_cfg rsmu_sabre_range_cfg[] = {
	38	{
	39	.range_min = 0,
	40	.range_max = 0x400,
	41	.selector_reg = RSMU_SABRE_PAGE_ADDR,
	42	.selector_mask = 0xFF,
	43	.selector_shift = 0,
	44	.window_start = 0,
	45	.window_len = RSMU_SABRE_PAGE_WINDOW,
	46	}
	47	};
	48
67d6c76f	49	static bool rsmu_sabre_volatile_reg(struct device *dev, unsigned int reg)
a1867f85 ML	50	{
a1867f85 ML	51	switch (reg) {
67d6c76f	52	case RSMU_SABRE_PAGE_ADDR:
a1867f85 ML	53	return false;
	54	default:
	55	return true;
	56	}
	57	}
	58
53d3ff7b ML	59	static int rsmu_smbus_i2c_write_device(struct rsmu_ddata rsmu, u8 reg, u8 buf, u8 bytes)
	60	{
	61	struct i2c_client *client = to_i2c_client(rsmu->dev);
	62
	63	return i2c_smbus_write_i2c_block_data(client, reg, bytes, buf);
	64	}
	65
	66	static int rsmu_smbus_i2c_read_device(struct rsmu_ddata rsmu, u8 reg, u8 buf, u8 bytes)
	67	{
	68	struct i2c_client *client = to_i2c_client(rsmu->dev);
	69	int ret;
	70
	71	ret = i2c_smbus_read_i2c_block_data(client, reg, bytes, buf);
	72	if (ret == bytes)
	73	return 0;
	74	else if (ret < 0)
	75	return ret;
	76	else
	77	return -EIO;
	78	}
	79
	80	static int rsmu_i2c_read_device(struct rsmu_ddata rsmu, u8 reg, u8 buf, u8 bytes)
a1867f85	81	{
67d6c76f ML	82	struct i2c_client *client = to_i2c_client(rsmu->dev);
	83	struct i2c_msg msg[2];
	84	int cnt;
	85
	86	msg[0].addr = client->addr;
	87	msg[0].flags = 0;
	88	msg[0].len = 1;
	89	msg[0].buf = ®
	90
	91	msg[1].addr = client->addr;
	92	msg[1].flags = I2C_M_RD;
	93	msg[1].len = bytes;
	94	msg[1].buf = buf;
	95
	96	cnt = i2c_transfer(client->adapter, msg, 2);
	97
	98	if (cnt < 0) {
	99	dev_err(rsmu->dev, "i2c_transfer failed at addr: %04x!", reg);
	100	return cnt;
	101	} else if (cnt != 2) {
	102	dev_err(rsmu->dev,
	103	"i2c_transfer sent only %d of 2 messages", cnt);
	104	return -EIO;
	105	}
	106
	107	return 0;
	108	}
	109
53d3ff7b	110	static int rsmu_i2c_write_device(struct rsmu_ddata rsmu, u8 reg, u8 buf, u8 bytes)
67d6c76f ML	111	{
67d6c76f ML	112	struct i2c_client *client = to_i2c_client(rsmu->dev);
53d3ff7b ML	113	/* we add 1 byte for device register */
53d3ff7b ML	114	u8 msg[RSMU_MAX_WRITE_COUNT + 1];
67d6c76f ML	115	int cnt;
	116
	117	if (bytes > RSMU_MAX_WRITE_COUNT)
	118	return -EINVAL;
	119
	120	msg[0] = reg;
	121	memcpy(&msg[1], buf, bytes);
	122
	123	cnt = i2c_master_send(client, msg, bytes + 1);
	124
	125	if (cnt < 0) {
	126	dev_err(&client->dev,
	127	"i2c_master_send failed at addr: %04x!", reg);
	128	return cnt;
a1867f85	129	}
67d6c76f ML	130
	131	return 0;
	132	}
	133
53d3ff7b ML	134	static int rsmu_write_page_register(struct rsmu_ddata *rsmu, u32 reg,
53d3ff7b ML	135	rsmu_rw_device rsmu_write_device)
67d6c76f ML	136	{
	137	u32 page = reg & RSMU_CM_PAGE_MASK;
	138	u8 buf[4];
	139	int err;
	140
	141	/* Do not modify offset register for none-scsr registers */
	142	if (reg < RSMU_CM_SCSR_BASE)
	143	return 0;
	144
	145	/* Simply return if we are on the same page */
	146	if (rsmu->page == page)
	147	return 0;
	148
	149	buf[0] = 0x0;
	150	buf[1] = (u8)((page >> 8) & 0xFF);
	151	buf[2] = (u8)((page >> 16) & 0xFF);
	152	buf[3] = (u8)((page >> 24) & 0xFF);
	153
	154	err = rsmu_write_device(rsmu, RSMU_CM_PAGE_ADDR, buf, sizeof(buf));
	155	if (err)
	156	dev_err(rsmu->dev, "Failed to set page offset 0x%x\n", page);
	157	else
	158	/* Remember the last page */
	159	rsmu->page = page;
	160
	161	return err;
	162	}
	163
53d3ff7b	164	static int rsmu_i2c_reg_read(void context, unsigned int reg, unsigned int val)
67d6c76f ML	165	{
	166	struct rsmu_ddata rsmu = i2c_get_clientdata((struct i2c_client )context);
	167	u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK);
	168	int err;
	169
53d3ff7b	170	err = rsmu_write_page_register(rsmu, reg, rsmu_i2c_write_device);
67d6c76f ML	171	if (err)
	172	return err;
	173
53d3ff7b	174	err = rsmu_i2c_read_device(rsmu, addr, (u8 *)val, 1);
67d6c76f ML	175	if (err)
	176	dev_err(rsmu->dev, "Failed to read offset address 0x%x\n", addr);
	177
	178	return err;
	179	}
	180
53d3ff7b	181	static int rsmu_i2c_reg_write(void *context, unsigned int reg, unsigned int val)
67d6c76f ML	182	{
	183	struct rsmu_ddata rsmu = i2c_get_clientdata((struct i2c_client )context);
	184	u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK);
	185	u8 data = (u8)val;
	186	int err;
	187
53d3ff7b	188	err = rsmu_write_page_register(rsmu, reg, rsmu_i2c_write_device);
67d6c76f ML	189	if (err)
	190	return err;
	191
53d3ff7b	192	err = rsmu_i2c_write_device(rsmu, addr, &data, 1);
67d6c76f ML	193	if (err)
	194	dev_err(rsmu->dev,
	195	"Failed to write offset address 0x%x\n", addr);
	196
	197	return err;
a1867f85 ML	198	}
a1867f85 ML	199
53d3ff7b ML	200	static int rsmu_smbus_i2c_reg_read(void context, unsigned int reg, unsigned int val)
	201	{
	202	struct rsmu_ddata rsmu = i2c_get_clientdata((struct i2c_client )context);
	203	u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK);
	204	int err;
	205
	206	err = rsmu_write_page_register(rsmu, reg, rsmu_smbus_i2c_write_device);
	207	if (err)
	208	return err;
	209
	210	err = rsmu_smbus_i2c_read_device(rsmu, addr, (u8 *)val, 1);
	211	if (err)
	212	dev_err(rsmu->dev, "Failed to read offset address 0x%x\n", addr);
	213
	214	return err;
	215	}
	216
	217	static int rsmu_smbus_i2c_reg_write(void *context, unsigned int reg, unsigned int val)
	218	{
	219	struct rsmu_ddata rsmu = i2c_get_clientdata((struct i2c_client )context);
	220	u8 addr = (u8)(reg & RSMU_CM_ADDRESS_MASK);
	221	u8 data = (u8)val;
	222	int err;
	223
	224	err = rsmu_write_page_register(rsmu, reg, rsmu_smbus_i2c_write_device);
	225	if (err)
	226	return err;
	227
	228	err = rsmu_smbus_i2c_write_device(rsmu, addr, &data, 1);
	229	if (err)
	230	dev_err(rsmu->dev,
	231	"Failed to write offset address 0x%x\n", addr);
	232
	233	return err;
	234	}
	235
	236	static const struct regmap_config rsmu_i2c_cm_regmap_config = {
67d6c76f	237	.reg_bits = 32,
a1867f85	238	.val_bits = 8,
67d6c76f	239	.max_register = 0x20120000,
53d3ff7b ML	240	.reg_read = rsmu_i2c_reg_read,
	241	.reg_write = rsmu_i2c_reg_write,
	242	.cache_type = REGCACHE_NONE,
	243	};
	244
	245	static const struct regmap_config rsmu_smbus_i2c_cm_regmap_config = {
	246	.reg_bits = 32,
	247	.val_bits = 8,
	248	.max_register = 0x20120000,
	249	.reg_read = rsmu_smbus_i2c_reg_read,
	250	.reg_write = rsmu_smbus_i2c_reg_write,
67d6c76f	251	.cache_type = REGCACHE_NONE,
a1867f85 ML	252	};
	253
	254	static const struct regmap_config rsmu_sabre_regmap_config = {
	255	.reg_bits = 8,
	256	.val_bits = 8,
	257	.max_register = 0x400,
	258	.ranges = rsmu_sabre_range_cfg,
	259	.num_ranges = ARRAY_SIZE(rsmu_sabre_range_cfg),
	260	.volatile_reg = rsmu_sabre_volatile_reg,
5db47ad8	261	.cache_type = REGCACHE_MAPLE,
a1867f85 ML	262	.can_multi_write = true,
	263	};
	264
	265	static const struct regmap_config rsmu_sl_regmap_config = {
	266	.reg_bits = 16,
	267	.val_bits = 8,
	268	.reg_format_endian = REGMAP_ENDIAN_BIG,
67d6c76f	269	.max_register = 0x340,
a1867f85 ML	270	.cache_type = REGCACHE_NONE,
	271	.can_multi_write = true,
	272	};
	273
a29f5a3e	274	static int rsmu_i2c_probe(struct i2c_client *client)
a1867f85	275	{
a29f5a3e	276	const struct i2c_device_id *id = i2c_client_get_device_id(client);
a1867f85 ML	277	const struct regmap_config *cfg;
	278	struct rsmu_ddata *rsmu;
	279	int ret;
	280
	281	rsmu = devm_kzalloc(&client->dev, sizeof(*rsmu), GFP_KERNEL);
	282	if (!rsmu)
	283	return -ENOMEM;
	284
	285	i2c_set_clientdata(client, rsmu);
	286
	287	rsmu->dev = &client->dev;
	288	rsmu->type = (enum rsmu_type)id->driver_data;
	289
	290	switch (rsmu->type) {
	291	case RSMU_CM:
53d3ff7b ML	292	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
	293	cfg = &rsmu_i2c_cm_regmap_config;
	294	} else if (i2c_check_functionality(client->adapter,
	295	I2C_FUNC_SMBUS_I2C_BLOCK)) {
	296	cfg = &rsmu_smbus_i2c_cm_regmap_config;
	297	} else {
	298	dev_err(rsmu->dev, "Unsupported i2c adapter\n");
	299	return -ENOTSUPP;
	300	}
a1867f85 ML	301	break;
	302	case RSMU_SABRE:
	303	cfg = &rsmu_sabre_regmap_config;
	304	break;
	305	case RSMU_SL:
	306	cfg = &rsmu_sl_regmap_config;
	307	break;
	308	default:
	309	dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type);
	310	return -ENODEV;
	311	}
67d6c76f ML	312
	313	if (rsmu->type == RSMU_CM)
	314	rsmu->regmap = devm_regmap_init(&client->dev, NULL, client, cfg);
	315	else
	316	rsmu->regmap = devm_regmap_init_i2c(client, cfg);
53d3ff7b	317
a1867f85 ML	318	if (IS_ERR(rsmu->regmap)) {
	319	ret = PTR_ERR(rsmu->regmap);
	320	dev_err(rsmu->dev, "Failed to allocate register map: %d\n", ret);
	321	return ret;
	322	}
	323
	324	return rsmu_core_init(rsmu);
	325	}
	326
ed5c2f5f	327	static void rsmu_i2c_remove(struct i2c_client *client)
a1867f85 ML	328	{
	329	struct rsmu_ddata *rsmu = i2c_get_clientdata(client);
	330
	331	rsmu_core_exit(rsmu);
a1867f85 ML	332	}
	333
	334	static const struct i2c_device_id rsmu_i2c_id[] = {
	335	{ "8a34000", RSMU_CM },
	336	{ "8a34001", RSMU_CM },
	337	{ "82p33810", RSMU_SABRE },
	338	{ "82p33811", RSMU_SABRE },
	339	{ "8v19n850", RSMU_SL },
	340	{ "8v19n851", RSMU_SL },
	341	{}
	342	};
	343	MODULE_DEVICE_TABLE(i2c, rsmu_i2c_id);
	344
	345	static const struct of_device_id rsmu_i2c_of_match[] = {
	346	{ .compatible = "idt,8a34000", .data = (void *)RSMU_CM },
	347	{ .compatible = "idt,8a34001", .data = (void *)RSMU_CM },
	348	{ .compatible = "idt,82p33810", .data = (void *)RSMU_SABRE },
	349	{ .compatible = "idt,82p33811", .data = (void *)RSMU_SABRE },
	350	{ .compatible = "idt,8v19n850", .data = (void *)RSMU_SL },
	351	{ .compatible = "idt,8v19n851", .data = (void *)RSMU_SL },
	352	{}
	353	};
	354	MODULE_DEVICE_TABLE(of, rsmu_i2c_of_match);
	355
	356	static struct i2c_driver rsmu_i2c_driver = {
	357	.driver = {
	358	.name = "rsmu-i2c",
e158e08a	359	.of_match_table = rsmu_i2c_of_match,
a1867f85	360	},
9816d859	361	.probe = rsmu_i2c_probe,
a1867f85 ML	362	.remove = rsmu_i2c_remove,
	363	.id_table = rsmu_i2c_id,
	364	};
	365
	366	static int __init rsmu_i2c_init(void)
	367	{
	368	return i2c_add_driver(&rsmu_i2c_driver);
	369	}
	370	subsys_initcall(rsmu_i2c_init);
	371
	372	static void __exit rsmu_i2c_exit(void)
	373	{
	374	i2c_del_driver(&rsmu_i2c_driver);
	375	}
	376	module_exit(rsmu_i2c_exit);
	377
	378	MODULE_DESCRIPTION("Renesas SMU I2C driver");
	379	MODULE_LICENSE("GPL");