[linux-block.git] / drivers / mfd / tps65910.c

/*
 * tps65910.c  --  TI TPS6591x
 *
 * Copyright 2010 Texas Instruments Inc.
 *
 * Author: Graeme Gregory <gg@slimlogic.co.uk>
 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
 *
 *  This program is free software; you can redistribute it and/or modify it
 *  under  the terms of the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the License, or (at your
 *  option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/regmap.h>
#include <linux/mfd/tps65910.h>
#include <linux/of_device.h>

static struct mfd_cell tps65910s[] = {
	{
		.name = "tps65910-gpio",
	},
	{
		.name = "tps65910-pmic",
	},
	{
		.name = "tps65910-rtc",
	},
	{
		.name = "tps65910-power",
	},
};


static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
	struct tps65910 *tps65910 = dev_get_drvdata(dev);

	/*
	 * Caching all regulator registers.
	 * All regualator register address range is same for
	 * TPS65910 and TPS65911
	 */
	if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
		/* Check for non-existing register */
		if (tps65910_chip_id(tps65910) == TPS65910)
			if ((reg == TPS65911_VDDCTRL_OP) ||
				(reg == TPS65911_VDDCTRL_SR))
				return true;
		return false;
	}
	return true;
}

static const struct regmap_config tps65910_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.volatile_reg = is_volatile_reg,
	.max_register = TPS65910_MAX_REGISTER - 1,
	.cache_type = REGCACHE_RBTREE,
};

static int __devinit tps65910_misc_init(struct tps65910 *tps65910,
					struct tps65910_board *pmic_pdata)
{
	struct device *dev = tps65910->dev;
	int ret;

	if (pmic_pdata->en_ck32k_xtal) {
		ret = tps65910_reg_clear_bits(tps65910,
						TPS65910_DEVCTRL,
						DEVCTRL_CK32K_CTRL_MASK);
		if (ret < 0) {
			dev_err(dev, "clear ck32k_ctrl failed: %d\n", ret);
			return ret;
		}
	}

	return 0;
}

static int __devinit tps65910_sleepinit(struct tps65910 *tps65910,
		struct tps65910_board *pmic_pdata)
{
	struct device *dev = NULL;
	int ret = 0;

	dev = tps65910->dev;

	if (!pmic_pdata->en_dev_slp)
		return 0;

	/* enabling SLEEP device state */
	ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
				DEVCTRL_DEV_SLP_MASK);
	if (ret < 0) {
		dev_err(dev, "set dev_slp failed: %d\n", ret);
		goto err_sleep_init;
	}

	/* Return if there is no sleep keepon data. */
	if (!pmic_pdata->slp_keepon)
		return 0;

	if (pmic_pdata->slp_keepon->therm_keepon) {
		ret = tps65910_reg_set_bits(tps65910,
				TPS65910_SLEEP_KEEP_RES_ON,
				SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
		if (ret < 0) {
			dev_err(dev, "set therm_keepon failed: %d\n", ret);
			goto disable_dev_slp;
		}
	}

	if (pmic_pdata->slp_keepon->clkout32k_keepon) {
		ret = tps65910_reg_set_bits(tps65910,
				TPS65910_SLEEP_KEEP_RES_ON,
				SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
		if (ret < 0) {
			dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
			goto disable_dev_slp;
		}
	}

	if (pmic_pdata->slp_keepon->i2chs_keepon) {
		ret = tps65910_reg_set_bits(tps65910,
				TPS65910_SLEEP_KEEP_RES_ON,
				SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
		if (ret < 0) {
			dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
			goto disable_dev_slp;
		}
	}

	return 0;

disable_dev_slp:
	tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
				DEVCTRL_DEV_SLP_MASK);

err_sleep_init:
	return ret;
}

#ifdef CONFIG_OF
static struct of_device_id tps65910_of_match[] = {
	{ .compatible = "ti,tps65910", .data = (void *)TPS65910},
	{ .compatible = "ti,tps65911", .data = (void *)TPS65911},
	{ },
};
MODULE_DEVICE_TABLE(of, tps65910_of_match);

static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
						int *chip_id)
{
	struct device_node *np = client->dev.of_node;
	struct tps65910_board *board_info;
	unsigned int prop;
	const struct of_device_id *match;
	int ret = 0;

	match = of_match_device(tps65910_of_match, &client->dev);
	if (!match) {
		dev_err(&client->dev, "Failed to find matching dt id\n");
		return NULL;
	}

	*chip_id  = (int)match->data;

	board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
			GFP_KERNEL);
	if (!board_info) {
		dev_err(&client->dev, "Failed to allocate pdata\n");
		return NULL;
	}

	ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
	if (!ret)
		board_info->vmbch_threshold = prop;
	else if (*chip_id == TPS65911)
		dev_warn(&client->dev, "VMBCH-Threshold not specified");

	ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
	if (!ret)
		board_info->vmbch2_threshold = prop;
	else if (*chip_id == TPS65911)
		dev_warn(&client->dev, "VMBCH2-Threshold not specified");

	prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
	board_info->en_ck32k_xtal = prop;

	board_info->irq = client->irq;
	board_info->irq_base = -1;

	return board_info;
}
#else
static inline
struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
					 int *chip_id)
{
	return NULL;
}
#endif

static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
					const struct i2c_device_id *id)
{
	struct tps65910 *tps65910;
	struct tps65910_board *pmic_plat_data;
	struct tps65910_board *of_pmic_plat_data = NULL;
	struct tps65910_platform_data *init_data;
	int ret = 0;
	int chip_id = id->driver_data;

	pmic_plat_data = dev_get_platdata(&i2c->dev);

	if (!pmic_plat_data && i2c->dev.of_node) {
		pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
		of_pmic_plat_data = pmic_plat_data;
	}

	if (!pmic_plat_data)
		return -EINVAL;

	init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
	if (init_data == NULL)
		return -ENOMEM;

	tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
	if (tps65910 == NULL)
		return -ENOMEM;

	tps65910->of_plat_data = of_pmic_plat_data;
	i2c_set_clientdata(i2c, tps65910);
	tps65910->dev = &i2c->dev;
	tps65910->i2c_client = i2c;
	tps65910->id = chip_id;
	mutex_init(&tps65910->io_mutex);

	tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
	if (IS_ERR(tps65910->regmap)) {
		ret = PTR_ERR(tps65910->regmap);
		dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
		return ret;
	}

	ret = mfd_add_devices(tps65910->dev, -1,
			      tps65910s, ARRAY_SIZE(tps65910s),
			      NULL, 0);
	if (ret < 0) {
		dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
		return ret;
	}

	init_data->irq = pmic_plat_data->irq;
	init_data->irq_base = pmic_plat_data->irq_base;

	tps65910_irq_init(tps65910, init_data->irq, init_data);
	tps65910_misc_init(tps65910, pmic_plat_data);
	tps65910_sleepinit(tps65910, pmic_plat_data);

	return ret;
}

static __devexit int tps65910_i2c_remove(struct i2c_client *i2c)
{
	struct tps65910 *tps65910 = i2c_get_clientdata(i2c);

	tps65910_irq_exit(tps65910);
	mfd_remove_devices(tps65910->dev);

	return 0;
}

static const struct i2c_device_id tps65910_i2c_id[] = {
       { "tps65910", TPS65910 },
       { "tps65911", TPS65911 },
       { }
};
MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);


static struct i2c_driver tps65910_i2c_driver = {
	.driver = {
		   .name = "tps65910",
		   .owner = THIS_MODULE,
		   .of_match_table = of_match_ptr(tps65910_of_match),
	},
	.probe = tps65910_i2c_probe,
	.remove = __devexit_p(tps65910_i2c_remove),
	.id_table = tps65910_i2c_id,
};

static int __init tps65910_i2c_init(void)
{
	return i2c_add_driver(&tps65910_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(tps65910_i2c_init);

static void __exit tps65910_i2c_exit(void)
{
	i2c_del_driver(&tps65910_i2c_driver);
}
module_exit(tps65910_i2c_exit);

MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
27c6750e GG	1	/*
	2	* tps65910.c -- TI TPS6591x
	3	*
	4	* Copyright 2010 Texas Instruments Inc.
	5	*
	6	* Author: Graeme Gregory <gg@slimlogic.co.uk>
	7	* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
	8	*
	9	* This program is free software; you can redistribute it and/or modify it
	10	* under the terms of the GNU General Public License as published by the
	11	* Free Software Foundation; either version 2 of the License, or (at your
	12	* option) any later version.
	13	*
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/moduleparam.h>
	18	#include <linux/init.h>
dc9913a0	19	#include <linux/err.h>
27c6750e GG	20	#include <linux/slab.h>
27c6750e GG	21	#include <linux/i2c.h>
27c6750e	22	#include <linux/mfd/core.h>
dc9913a0	23	#include <linux/regmap.h>
27c6750e	24	#include <linux/mfd/tps65910.h>
cd4209ce	25	#include <linux/of_device.h>
27c6750e GG	26
27c6750e GG	27	static struct mfd_cell tps65910s[] = {
32df986e LD	28	{
	29	.name = "tps65910-gpio",
	30	},
27c6750e GG	31	{
	32	.name = "tps65910-pmic",
	33	},
	34	{
	35	.name = "tps65910-rtc",
	36	},
	37	{
	38	.name = "tps65910-power",
	39	},
	40	};
	41
	42
dc9913a0 LD	43	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	44	{
	45	struct tps65910 *tps65910 = dev_get_drvdata(dev);
	46
	47	/*
	48	* Caching all regulator registers.
	49	* All regualator register address range is same for
	50	* TPS65910 and TPS65911
	51	*/
	52	if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
	53	/* Check for non-existing register */
	54	if (tps65910_chip_id(tps65910) == TPS65910)
	55	if ((reg == TPS65911_VDDCTRL_OP) \|\|
	56	(reg == TPS65911_VDDCTRL_SR))
	57	return true;
	58	return false;
	59	}
	60	return true;
	61	}
	62
39ecb037	63	static const struct regmap_config tps65910_regmap_config = {
dc9913a0 LD	64	.reg_bits = 8,
	65	.val_bits = 8,
	66	.volatile_reg = is_volatile_reg,
3bf6bf9b	67	.max_register = TPS65910_MAX_REGISTER - 1,
dc9913a0 LD	68	.cache_type = REGCACHE_RBTREE,
	69	};
	70
712db99d JH	71	static int __devinit tps65910_misc_init(struct tps65910 *tps65910,
	72	struct tps65910_board *pmic_pdata)
	73	{
	74	struct device *dev = tps65910->dev;
	75	int ret;
	76
	77	if (pmic_pdata->en_ck32k_xtal) {
	78	ret = tps65910_reg_clear_bits(tps65910,
	79	TPS65910_DEVCTRL,
	80	DEVCTRL_CK32K_CTRL_MASK);
	81	if (ret < 0) {
	82	dev_err(dev, "clear ck32k_ctrl failed: %d\n", ret);
	83	return ret;
	84	}
	85	}
	86
	87	return 0;
	88	}
	89
63745d40	90	static int __devinit tps65910_sleepinit(struct tps65910 *tps65910,
201cf052 LD	91	struct tps65910_board *pmic_pdata)
	92	{
	93	struct device *dev = NULL;
	94	int ret = 0;
	95
	96	dev = tps65910->dev;
	97
	98	if (!pmic_pdata->en_dev_slp)
	99	return 0;
	100
	101	/* enabling SLEEP device state */
3f7e8275	102	ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
201cf052 LD	103	DEVCTRL_DEV_SLP_MASK);
	104	if (ret < 0) {
	105	dev_err(dev, "set dev_slp failed: %d\n", ret);
	106	goto err_sleep_init;
	107	}
	108
	109	/* Return if there is no sleep keepon data. */
	110	if (!pmic_pdata->slp_keepon)
	111	return 0;
	112
	113	if (pmic_pdata->slp_keepon->therm_keepon) {
3f7e8275 RK	114	ret = tps65910_reg_set_bits(tps65910,
3f7e8275 RK	115	TPS65910_SLEEP_KEEP_RES_ON,
201cf052 LD	116	SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
	117	if (ret < 0) {
	118	dev_err(dev, "set therm_keepon failed: %d\n", ret);
	119	goto disable_dev_slp;
	120	}
	121	}
	122
	123	if (pmic_pdata->slp_keepon->clkout32k_keepon) {
3f7e8275 RK	124	ret = tps65910_reg_set_bits(tps65910,
3f7e8275 RK	125	TPS65910_SLEEP_KEEP_RES_ON,
201cf052 LD	126	SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
	127	if (ret < 0) {
	128	dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
	129	goto disable_dev_slp;
	130	}
	131	}
	132
	133	if (pmic_pdata->slp_keepon->i2chs_keepon) {
3f7e8275 RK	134	ret = tps65910_reg_set_bits(tps65910,
3f7e8275 RK	135	TPS65910_SLEEP_KEEP_RES_ON,
201cf052 LD	136	SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
	137	if (ret < 0) {
	138	dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
	139	goto disable_dev_slp;
	140	}
	141	}
	142
	143	return 0;
	144
	145	disable_dev_slp:
3f7e8275 RK	146	tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
3f7e8275 RK	147	DEVCTRL_DEV_SLP_MASK);
201cf052 LD	148
	149	err_sleep_init:
	150	return ret;
	151	}
	152
cd4209ce RK	153	#ifdef CONFIG_OF
	154	static struct of_device_id tps65910_of_match[] = {
	155	{ .compatible = "ti,tps65910", .data = (void *)TPS65910},
	156	{ .compatible = "ti,tps65911", .data = (void *)TPS65911},
	157	{ },
	158	};
	159	MODULE_DEVICE_TABLE(of, tps65910_of_match);
	160
	161	static struct tps65910_board tps65910_parse_dt(struct i2c_client client,
	162	int *chip_id)
	163	{
	164	struct device_node *np = client->dev.of_node;
	165	struct tps65910_board *board_info;
	166	unsigned int prop;
	167	const struct of_device_id *match;
cd4209ce	168	int ret = 0;
cd4209ce RK	169
	170	match = of_match_device(tps65910_of_match, &client->dev);
	171	if (!match) {
	172	dev_err(&client->dev, "Failed to find matching dt id\n");
	173	return NULL;
	174	}
	175
	176	*chip_id = (int)match->data;
	177
	178	board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
	179	GFP_KERNEL);
	180	if (!board_info) {
	181	dev_err(&client->dev, "Failed to allocate pdata\n");
	182	return NULL;
	183	}
	184
	185	ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
	186	if (!ret)
	187	board_info->vmbch_threshold = prop;
	188	else if (*chip_id == TPS65911)
	189	dev_warn(&client->dev, "VMBCH-Threshold not specified");
	190
	191	ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
	192	if (!ret)
	193	board_info->vmbch2_threshold = prop;
	194	else if (*chip_id == TPS65911)
	195	dev_warn(&client->dev, "VMBCH2-Threshold not specified");
	196
bcc1dd4c JH	197	prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
	198	board_info->en_ck32k_xtal = prop;
	199
cd4209ce RK	200	board_info->irq = client->irq;
cd4209ce RK	201	board_info->irq_base = -1;
cd4209ce RK	202
	203	return board_info;
	204	}
	205	#else
7f65f74c SO	206	static inline
	207	struct tps65910_board tps65910_parse_dt(struct i2c_client client,
	208	int *chip_id)
cd4209ce RK	209	{
	210	return NULL;
	211	}
	212	#endif
201cf052	213
63745d40 MB	214	static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
63745d40 MB	215	const struct i2c_device_id *id)
27c6750e GG	216	{
27c6750e GG	217	struct tps65910 *tps65910;
2537df72	218	struct tps65910_board *pmic_plat_data;
cb8d8654	219	struct tps65910_board *of_pmic_plat_data = NULL;
e3471bdc	220	struct tps65910_platform_data *init_data;
27c6750e	221	int ret = 0;
cd4209ce	222	int chip_id = id->driver_data;
27c6750e	223
2537df72	224	pmic_plat_data = dev_get_platdata(&i2c->dev);
cd4209ce	225
cb8d8654	226	if (!pmic_plat_data && i2c->dev.of_node) {
cd4209ce	227	pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
cb8d8654 LD	228	of_pmic_plat_data = pmic_plat_data;
cb8d8654 LD	229	}
cd4209ce	230
2537df72 GG	231	if (!pmic_plat_data)
	232	return -EINVAL;
	233
63fe7dee	234	init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
e3471bdc GG	235	if (init_data == NULL)
	236	return -ENOMEM;
	237
63fe7dee LD	238	tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
63fe7dee LD	239	if (tps65910 == NULL)
27c6750e GG	240	return -ENOMEM;
27c6750e GG	241
cb8d8654	242	tps65910->of_plat_data = of_pmic_plat_data;
27c6750e GG	243	i2c_set_clientdata(i2c, tps65910);
	244	tps65910->dev = &i2c->dev;
	245	tps65910->i2c_client = i2c;
cd4209ce	246	tps65910->id = chip_id;
27c6750e GG	247	mutex_init(&tps65910->io_mutex);
27c6750e GG	248
63fe7dee	249	tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
dc9913a0 LD	250	if (IS_ERR(tps65910->regmap)) {
	251	ret = PTR_ERR(tps65910->regmap);
	252	dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
63fe7dee	253	return ret;
dc9913a0 LD	254	}
dc9913a0 LD	255
27c6750e GG	256	ret = mfd_add_devices(tps65910->dev, -1,
	257	tps65910s, ARRAY_SIZE(tps65910s),
	258	NULL, 0);
63fe7dee LD	259	if (ret < 0) {
	260	dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
	261	return ret;
	262	}
27c6750e	263
b1224cd1	264	init_data->irq = pmic_plat_data->irq;
1773140f	265	init_data->irq_base = pmic_plat_data->irq_base;
b1224cd1	266
1e351a95	267	tps65910_irq_init(tps65910, init_data->irq, init_data);
712db99d	268	tps65910_misc_init(tps65910, pmic_plat_data);
201cf052 LD	269	tps65910_sleepinit(tps65910, pmic_plat_data);
201cf052 LD	270
27c6750e GG	271	return ret;
	272	}
	273
63745d40	274	static __devexit int tps65910_i2c_remove(struct i2c_client *i2c)
27c6750e GG	275	{
	276	struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
	277
ec2328c3	278	tps65910_irq_exit(tps65910);
1e351a95	279	mfd_remove_devices(tps65910->dev);
27c6750e GG	280
	281	return 0;
	282	}
	283
	284	static const struct i2c_device_id tps65910_i2c_id[] = {
79557056 JEC	285	{ "tps65910", TPS65910 },
79557056 JEC	286	{ "tps65911", TPS65911 },
27c6750e GG	287	{ }
	288	};
	289	MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
	290
	291
	292	static struct i2c_driver tps65910_i2c_driver = {
	293	.driver = {
	294	.name = "tps65910",
	295	.owner = THIS_MODULE,
cd4209ce	296	.of_match_table = of_match_ptr(tps65910_of_match),
27c6750e GG	297	},
27c6750e GG	298	.probe = tps65910_i2c_probe,
63745d40	299	.remove = __devexit_p(tps65910_i2c_remove),
27c6750e GG	300	.id_table = tps65910_i2c_id,
	301	};
	302
	303	static int __init tps65910_i2c_init(void)
	304	{
	305	return i2c_add_driver(&tps65910_i2c_driver);
	306	}
	307	/* init early so consumer devices can complete system boot */
	308	subsys_initcall(tps65910_i2c_init);
	309
	310	static void __exit tps65910_i2c_exit(void)
	311	{
	312	i2c_del_driver(&tps65910_i2c_driver);
	313	}
	314	module_exit(tps65910_i2c_exit);
	315
	316	MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
	317	MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
	318	MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
	319	MODULE_LICENSE("GPL");