[deliverable/linux.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_ck32k_init(struct tps65910 *tps65910,
					struct tps65910_board *pmic_pdata)
{
	int ret;

	if (!pmic_pdata->en_ck32k_xtal)
		return 0;

	ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
						DEVCTRL_CK32K_CTRL_MASK);
	if (ret < 0) {
		dev_err(tps65910->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, NULL);
	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_ck32k_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
d02e83cb	71	static int __devinit tps65910_ck32k_init(struct tps65910 *tps65910,
712db99d JH	72	struct tps65910_board *pmic_pdata)
712db99d JH	73	{
712db99d JH	74	int ret;
712db99d JH	75
d02e83cb JH	76	if (!pmic_pdata->en_ck32k_xtal)
	77	return 0;
	78
	79	ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
712db99d	80	DEVCTRL_CK32K_CTRL_MASK);
d02e83cb JH	81	if (ret < 0) {
	82	dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
	83	return ret;
712db99d JH	84	}
	85
	86	return 0;
	87	}
	88
63745d40	89	static int __devinit tps65910_sleepinit(struct tps65910 *tps65910,
201cf052 LD	90	struct tps65910_board *pmic_pdata)
	91	{
	92	struct device *dev = NULL;
	93	int ret = 0;
	94
	95	dev = tps65910->dev;
	96
	97	if (!pmic_pdata->en_dev_slp)
	98	return 0;
	99
	100	/* enabling SLEEP device state */
3f7e8275	101	ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
201cf052 LD	102	DEVCTRL_DEV_SLP_MASK);
	103	if (ret < 0) {
	104	dev_err(dev, "set dev_slp failed: %d\n", ret);
	105	goto err_sleep_init;
	106	}
	107
	108	/* Return if there is no sleep keepon data. */
	109	if (!pmic_pdata->slp_keepon)
	110	return 0;
	111
	112	if (pmic_pdata->slp_keepon->therm_keepon) {
3f7e8275 RK	113	ret = tps65910_reg_set_bits(tps65910,
3f7e8275 RK	114	TPS65910_SLEEP_KEEP_RES_ON,
201cf052 LD	115	SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
	116	if (ret < 0) {
	117	dev_err(dev, "set therm_keepon failed: %d\n", ret);
	118	goto disable_dev_slp;
	119	}
	120	}
	121
	122	if (pmic_pdata->slp_keepon->clkout32k_keepon) {
3f7e8275 RK	123	ret = tps65910_reg_set_bits(tps65910,
3f7e8275 RK	124	TPS65910_SLEEP_KEEP_RES_ON,
201cf052 LD	125	SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
	126	if (ret < 0) {
	127	dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
	128	goto disable_dev_slp;
	129	}
	130	}
	131
	132	if (pmic_pdata->slp_keepon->i2chs_keepon) {
3f7e8275 RK	133	ret = tps65910_reg_set_bits(tps65910,
3f7e8275 RK	134	TPS65910_SLEEP_KEEP_RES_ON,
201cf052 LD	135	SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
	136	if (ret < 0) {
	137	dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
	138	goto disable_dev_slp;
	139	}
	140	}
	141
	142	return 0;
	143
	144	disable_dev_slp:
3f7e8275 RK	145	tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
3f7e8275 RK	146	DEVCTRL_DEV_SLP_MASK);
201cf052 LD	147
	148	err_sleep_init:
	149	return ret;
	150	}
	151
cd4209ce RK	152	#ifdef CONFIG_OF
	153	static struct of_device_id tps65910_of_match[] = {
	154	{ .compatible = "ti,tps65910", .data = (void *)TPS65910},
	155	{ .compatible = "ti,tps65911", .data = (void *)TPS65911},
	156	{ },
	157	};
	158	MODULE_DEVICE_TABLE(of, tps65910_of_match);
	159
	160	static struct tps65910_board tps65910_parse_dt(struct i2c_client client,
	161	int *chip_id)
	162	{
	163	struct device_node *np = client->dev.of_node;
	164	struct tps65910_board *board_info;
	165	unsigned int prop;
	166	const struct of_device_id *match;
cd4209ce	167	int ret = 0;
cd4209ce RK	168
	169	match = of_match_device(tps65910_of_match, &client->dev);
	170	if (!match) {
	171	dev_err(&client->dev, "Failed to find matching dt id\n");
	172	return NULL;
	173	}
	174
	175	*chip_id = (int)match->data;
	176
	177	board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
	178	GFP_KERNEL);
	179	if (!board_info) {
	180	dev_err(&client->dev, "Failed to allocate pdata\n");
	181	return NULL;
	182	}
	183
	184	ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
	185	if (!ret)
	186	board_info->vmbch_threshold = prop;
	187	else if (*chip_id == TPS65911)
	188	dev_warn(&client->dev, "VMBCH-Threshold not specified");
	189
	190	ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
	191	if (!ret)
	192	board_info->vmbch2_threshold = prop;
	193	else if (*chip_id == TPS65911)
	194	dev_warn(&client->dev, "VMBCH2-Threshold not specified");
	195
bcc1dd4c JH	196	prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
	197	board_info->en_ck32k_xtal = prop;
	198
cd4209ce RK	199	board_info->irq = client->irq;
cd4209ce RK	200	board_info->irq_base = -1;
cd4209ce RK	201
	202	return board_info;
	203	}
	204	#else
7f65f74c SO	205	static inline
	206	struct tps65910_board tps65910_parse_dt(struct i2c_client client,
	207	int *chip_id)
cd4209ce RK	208	{
	209	return NULL;
	210	}
	211	#endif
201cf052	212
63745d40 MB	213	static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
63745d40 MB	214	const struct i2c_device_id *id)
27c6750e GG	215	{
27c6750e GG	216	struct tps65910 *tps65910;
2537df72	217	struct tps65910_board *pmic_plat_data;
cb8d8654	218	struct tps65910_board *of_pmic_plat_data = NULL;
e3471bdc	219	struct tps65910_platform_data *init_data;
27c6750e	220	int ret = 0;
cd4209ce	221	int chip_id = id->driver_data;
27c6750e	222
2537df72	223	pmic_plat_data = dev_get_platdata(&i2c->dev);
cd4209ce	224
cb8d8654	225	if (!pmic_plat_data && i2c->dev.of_node) {
cd4209ce	226	pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
cb8d8654 LD	227	of_pmic_plat_data = pmic_plat_data;
cb8d8654 LD	228	}
cd4209ce	229
2537df72 GG	230	if (!pmic_plat_data)
	231	return -EINVAL;
	232
63fe7dee	233	init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
e3471bdc GG	234	if (init_data == NULL)
	235	return -ENOMEM;
	236
63fe7dee LD	237	tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
63fe7dee LD	238	if (tps65910 == NULL)
27c6750e GG	239	return -ENOMEM;
27c6750e GG	240
cb8d8654	241	tps65910->of_plat_data = of_pmic_plat_data;
27c6750e GG	242	i2c_set_clientdata(i2c, tps65910);
	243	tps65910->dev = &i2c->dev;
	244	tps65910->i2c_client = i2c;
cd4209ce	245	tps65910->id = chip_id;
27c6750e GG	246	mutex_init(&tps65910->io_mutex);
27c6750e GG	247
63fe7dee	248	tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
dc9913a0 LD	249	if (IS_ERR(tps65910->regmap)) {
	250	ret = PTR_ERR(tps65910->regmap);
	251	dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
63fe7dee	252	return ret;
dc9913a0 LD	253	}
dc9913a0 LD	254
27c6750e GG	255	ret = mfd_add_devices(tps65910->dev, -1,
27c6750e GG	256	tps65910s, ARRAY_SIZE(tps65910s),
0848c94f	257	NULL, 0, NULL);
63fe7dee LD	258	if (ret < 0) {
	259	dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
	260	return ret;
	261	}
27c6750e	262
b1224cd1	263	init_data->irq = pmic_plat_data->irq;
1773140f	264	init_data->irq_base = pmic_plat_data->irq_base;
b1224cd1	265
1e351a95	266	tps65910_irq_init(tps65910, init_data->irq, init_data);
d02e83cb	267	tps65910_ck32k_init(tps65910, pmic_plat_data);
201cf052 LD	268	tps65910_sleepinit(tps65910, pmic_plat_data);
201cf052 LD	269
27c6750e GG	270	return ret;
	271	}
	272
63745d40	273	static __devexit int tps65910_i2c_remove(struct i2c_client *i2c)
27c6750e GG	274	{
	275	struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
	276
ec2328c3	277	tps65910_irq_exit(tps65910);
1e351a95	278	mfd_remove_devices(tps65910->dev);
27c6750e GG	279
	280	return 0;
	281	}
	282
	283	static const struct i2c_device_id tps65910_i2c_id[] = {
79557056 JEC	284	{ "tps65910", TPS65910 },
79557056 JEC	285	{ "tps65911", TPS65911 },
27c6750e GG	286	{ }
	287	};
	288	MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
	289
	290
	291	static struct i2c_driver tps65910_i2c_driver = {
	292	.driver = {
	293	.name = "tps65910",
	294	.owner = THIS_MODULE,
cd4209ce	295	.of_match_table = of_match_ptr(tps65910_of_match),
27c6750e GG	296	},
27c6750e GG	297	.probe = tps65910_i2c_probe,
63745d40	298	.remove = __devexit_p(tps65910_i2c_remove),
27c6750e GG	299	.id_table = tps65910_i2c_id,
	300	};
	301
	302	static int __init tps65910_i2c_init(void)
	303	{
	304	return i2c_add_driver(&tps65910_i2c_driver);
	305	}
	306	/* init early so consumer devices can complete system boot */
	307	subsys_initcall(tps65910_i2c_init);
	308
	309	static void __exit tps65910_i2c_exit(void)
	310	{
	311	i2c_del_driver(&tps65910_i2c_driver);
	312	}
	313	module_exit(tps65910_i2c_exit);
	314
	315	MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
	316	MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
	317	MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
	318	MODULE_LICENSE("GPL");