[linux-2.6-block.git] / drivers / regulator / fan53555.c

/*
 * FAN53555 Fairchild Digitally Programmable TinyBuck Regulator Driver.
 *
 * Supported Part Numbers:
 * FAN53555UC00X/01X/03X/04X/05X
 *
 * Copyright (c) 2012 Marvell Technology Ltd.
 * Yunfan Zhang <yfzhang@marvell.com>
 *
 * This package is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */
#include <linux/module.h>
#include <linux/param.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
#include <linux/of_device.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#include <linux/regulator/fan53555.h>

/* Voltage setting */
#define FAN53555_VSEL0		0x00
#define FAN53555_VSEL1		0x01
/* Control register */
#define FAN53555_CONTROL	0x02
/* IC Type */
#define FAN53555_ID1		0x03
/* IC mask version */
#define FAN53555_ID2		0x04
/* Monitor register */
#define FAN53555_MONITOR	0x05

/* VSEL bit definitions */
#define VSEL_BUCK_EN	(1 << 7)
#define VSEL_MODE		(1 << 6)
#define VSEL_NSEL_MASK	0x3F
/* Chip ID and Verison */
#define DIE_ID		0x0F	/* ID1 */
#define DIE_REV		0x0F	/* ID2 */
/* Control bit definitions */
#define CTL_OUTPUT_DISCHG	(1 << 7)
#define CTL_SLEW_MASK		(0x7 << 4)
#define CTL_SLEW_SHIFT		4
#define CTL_RESET			(1 << 2)

#define FAN53555_NVOLTAGES	64	/* Numbers of voltages */

enum fan53555_vendor {
	FAN53555_VENDOR_FAIRCHILD = 0,
	FAN53555_VENDOR_SILERGY,
};

/* IC Type */
enum {
	FAN53555_CHIP_ID_00 = 0,
	FAN53555_CHIP_ID_01,
	FAN53555_CHIP_ID_02,
	FAN53555_CHIP_ID_03,
	FAN53555_CHIP_ID_04,
	FAN53555_CHIP_ID_05,
};

enum {
	SILERGY_SYR82X = 8,
};

struct fan53555_device_info {
	enum fan53555_vendor vendor;
	struct regmap *regmap;
	struct device *dev;
	struct regulator_desc desc;
	struct regulator_dev *rdev;
	struct regulator_init_data *regulator;
	/* IC Type and Rev */
	int chip_id;
	int chip_rev;
	/* Voltage setting register */
	unsigned int vol_reg;
	unsigned int sleep_reg;
	/* Voltage range and step(linear) */
	unsigned int vsel_min;
	unsigned int vsel_step;
	/* Voltage slew rate limiting */
	unsigned int slew_rate;
	/* Sleep voltage cache */
	unsigned int sleep_vol_cache;
};

static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
{
	struct fan53555_device_info *di = rdev_get_drvdata(rdev);
	int ret;

	if (di->sleep_vol_cache == uV)
		return 0;
	ret = regulator_map_voltage_linear(rdev, uV, uV);
	if (ret < 0)
		return ret;
	ret = regmap_update_bits(di->regmap, di->sleep_reg,
					VSEL_NSEL_MASK, ret);
	if (ret < 0)
		return ret;
	/* Cache the sleep voltage setting.
	 * Might not be the real voltage which is rounded */
	di->sleep_vol_cache = uV;

	return 0;
}

static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
	struct fan53555_device_info *di = rdev_get_drvdata(rdev);

	switch (mode) {
	case REGULATOR_MODE_FAST:
		regmap_update_bits(di->regmap, di->vol_reg,
				VSEL_MODE, VSEL_MODE);
		break;
	case REGULATOR_MODE_NORMAL:
		regmap_update_bits(di->regmap, di->vol_reg, VSEL_MODE, 0);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static unsigned int fan53555_get_mode(struct regulator_dev *rdev)
{
	struct fan53555_device_info *di = rdev_get_drvdata(rdev);
	unsigned int val;
	int ret = 0;

	ret = regmap_read(di->regmap, di->vol_reg, &val);
	if (ret < 0)
		return ret;
	if (val & VSEL_MODE)
		return REGULATOR_MODE_FAST;
	else
		return REGULATOR_MODE_NORMAL;
}

static const int slew_rates[] = {
	64000,
	32000,
	16000,
	 8000,
	 4000,
	 2000,
	 1000,
	  500,
};

static int fan53555_set_ramp(struct regulator_dev *rdev, int ramp)
{
	struct fan53555_device_info *di = rdev_get_drvdata(rdev);
	int regval = -1, i;

	for (i = 0; i < ARRAY_SIZE(slew_rates); i++) {
		if (ramp <= slew_rates[i])
			regval = i;
		else
			break;
	}

	if (regval < 0) {
		dev_err(di->dev, "unsupported ramp value %d\n", ramp);
		return -EINVAL;
	}

	return regmap_update_bits(di->regmap, FAN53555_CONTROL,
				  CTL_SLEW_MASK, regval << CTL_SLEW_SHIFT);
}

static struct regulator_ops fan53555_regulator_ops = {
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_time_sel = regulator_set_voltage_time_sel,
	.map_voltage = regulator_map_voltage_linear,
	.list_voltage = regulator_list_voltage_linear,
	.set_suspend_voltage = fan53555_set_suspend_voltage,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_mode = fan53555_set_mode,
	.get_mode = fan53555_get_mode,
	.set_ramp_delay = fan53555_set_ramp,
};

static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
{
	/* Init voltage range and step */
	switch (di->chip_id) {
	case FAN53555_CHIP_ID_00:
	case FAN53555_CHIP_ID_01:
	case FAN53555_CHIP_ID_03:
	case FAN53555_CHIP_ID_05:
		di->vsel_min = 600000;
		di->vsel_step = 10000;
		break;
	case FAN53555_CHIP_ID_04:
		di->vsel_min = 603000;
		di->vsel_step = 12826;
		break;
	default:
		dev_err(di->dev,
			"Chip ID %d not supported!\n", di->chip_id);
		return -EINVAL;
	}

	return 0;
}

static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
{
	/* Init voltage range and step */
	switch (di->chip_id) {
	case SILERGY_SYR82X:
		di->vsel_min = 712500;
		di->vsel_step = 12500;
		break;
	default:
		dev_err(di->dev,
			"Chip ID %d not supported!\n", di->chip_id);
		return -EINVAL;
	}

	return 0;
}

/* For 00,01,03,05 options:
 * VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
 * For 04 option:
 * VOUT = 0.603V + NSELx * 12.826mV, from 0.603 to 1.411V.
 * */
static int fan53555_device_setup(struct fan53555_device_info *di,
				struct fan53555_platform_data *pdata)
{
	int ret = 0;

	/* Setup voltage control register */
	switch (pdata->sleep_vsel_id) {
	case FAN53555_VSEL_ID_0:
		di->sleep_reg = FAN53555_VSEL0;
		di->vol_reg = FAN53555_VSEL1;
		break;
	case FAN53555_VSEL_ID_1:
		di->sleep_reg = FAN53555_VSEL1;
		di->vol_reg = FAN53555_VSEL0;
		break;
	default:
		dev_err(di->dev, "Invalid VSEL ID!\n");
		return -EINVAL;
	}

	switch (di->vendor) {
	case FAN53555_VENDOR_FAIRCHILD:
		ret = fan53555_voltages_setup_fairchild(di);
		break;
	case FAN53555_VENDOR_SILERGY:
		ret = fan53555_voltages_setup_silergy(di);
		break;
	default:
		dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
		return -EINVAL;
	}

	return ret;
}

static int fan53555_regulator_register(struct fan53555_device_info *di,
			struct regulator_config *config)
{
	struct regulator_desc *rdesc = &di->desc;

	rdesc->name = "fan53555-reg";
	rdesc->supply_name = "vin";
	rdesc->ops = &fan53555_regulator_ops;
	rdesc->type = REGULATOR_VOLTAGE;
	rdesc->n_voltages = FAN53555_NVOLTAGES;
	rdesc->enable_reg = di->vol_reg;
	rdesc->enable_mask = VSEL_BUCK_EN;
	rdesc->min_uV = di->vsel_min;
	rdesc->uV_step = di->vsel_step;
	rdesc->vsel_reg = di->vol_reg;
	rdesc->vsel_mask = VSEL_NSEL_MASK;
	rdesc->owner = THIS_MODULE;

	di->rdev = devm_regulator_register(di->dev, &di->desc, config);
	return PTR_ERR_OR_ZERO(di->rdev);
}

static const struct regmap_config fan53555_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
};

static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev,
					      struct device_node *np,
					      const struct regulator_desc *desc)
{
	struct fan53555_platform_data *pdata;
	int ret;
	u32 tmp;

	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return NULL;

	pdata->regulator = of_get_regulator_init_data(dev, np, desc);

	ret = of_property_read_u32(np, "fcs,suspend-voltage-selector",
				   &tmp);
	if (!ret)
		pdata->sleep_vsel_id = tmp;

	return pdata;
}

static const struct of_device_id fan53555_dt_ids[] = {
	{
		.compatible = "fcs,fan53555",
		.data = (void *)FAN53555_VENDOR_FAIRCHILD
	}, {
		.compatible = "silergy,syr827",
		.data = (void *)FAN53555_VENDOR_SILERGY,
	}, {
		.compatible = "silergy,syr828",
		.data = (void *)FAN53555_VENDOR_SILERGY,
	},
	{ }
};
MODULE_DEVICE_TABLE(of, fan53555_dt_ids);

static int fan53555_regulator_probe(struct i2c_client *client,
				const struct i2c_device_id *id)
{
	struct device_node *np = client->dev.of_node;
	struct fan53555_device_info *di;
	struct fan53555_platform_data *pdata;
	struct regulator_config config = { };
	unsigned int val;
	int ret;

	di = devm_kzalloc(&client->dev, sizeof(struct fan53555_device_info),
					GFP_KERNEL);
	if (!di)
		return -ENOMEM;

	pdata = dev_get_platdata(&client->dev);
	if (!pdata)
		pdata = fan53555_parse_dt(&client->dev, np, &di->desc);

	if (!pdata || !pdata->regulator) {
		dev_err(&client->dev, "Platform data not found!\n");
		return -ENODEV;
	}

	di->regulator = pdata->regulator;
	if (client->dev.of_node) {
		const struct of_device_id *match;

		match = of_match_device(of_match_ptr(fan53555_dt_ids),
					&client->dev);
		if (!match)
			return -ENODEV;

		di->vendor = (unsigned long) match->data;
	} else {
		/* if no ramp constraint set, get the pdata ramp_delay */
		if (!di->regulator->constraints.ramp_delay) {
			int slew_idx = (pdata->slew_rate & 0x7)
						? pdata->slew_rate : 0;

			di->regulator->constraints.ramp_delay
						= slew_rates[slew_idx];
		}

		di->vendor = id->driver_data;
	}

	di->regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config);
	if (IS_ERR(di->regmap)) {
		dev_err(&client->dev, "Failed to allocate regmap!\n");
		return PTR_ERR(di->regmap);
	}
	di->dev = &client->dev;
	i2c_set_clientdata(client, di);
	/* Get chip ID */
	ret = regmap_read(di->regmap, FAN53555_ID1, &val);
	if (ret < 0) {
		dev_err(&client->dev, "Failed to get chip ID!\n");
		return ret;
	}
	di->chip_id = val & DIE_ID;
	/* Get chip revision */
	ret = regmap_read(di->regmap, FAN53555_ID2, &val);
	if (ret < 0) {
		dev_err(&client->dev, "Failed to get chip Rev!\n");
		return ret;
	}
	di->chip_rev = val & DIE_REV;
	dev_info(&client->dev, "FAN53555 Option[%d] Rev[%d] Detected!\n",
				di->chip_id, di->chip_rev);
	/* Device init */
	ret = fan53555_device_setup(di, pdata);
	if (ret < 0) {
		dev_err(&client->dev, "Failed to setup device!\n");
		return ret;
	}
	/* Register regulator */
	config.dev = di->dev;
	config.init_data = di->regulator;
	config.regmap = di->regmap;
	config.driver_data = di;
	config.of_node = np;

	ret = fan53555_regulator_register(di, &config);
	if (ret < 0)
		dev_err(&client->dev, "Failed to register regulator!\n");
	return ret;

}

static const struct i2c_device_id fan53555_id[] = {
	{
		.name = "fan53555",
		.driver_data = FAN53555_VENDOR_FAIRCHILD
	}, {
		.name = "syr82x",
		.driver_data = FAN53555_VENDOR_SILERGY
	},
	{ },
};
MODULE_DEVICE_TABLE(i2c, fan53555_id);

static struct i2c_driver fan53555_regulator_driver = {
	.driver = {
		.name = "fan53555-regulator",
		.of_match_table = of_match_ptr(fan53555_dt_ids),
	},
	.probe = fan53555_regulator_probe,
	.id_table = fan53555_id,
};

module_i2c_driver(fan53555_regulator_driver);

MODULE_AUTHOR("Yunfan Zhang <yfzhang@marvell.com>");
MODULE_DESCRIPTION("FAN53555 regulator driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
49d8c599 YZ	1	/*
	2	* FAN53555 Fairchild Digitally Programmable TinyBuck Regulator Driver.
	3	*
	4	* Supported Part Numbers:
	5	* FAN53555UC00X/01X/03X/04X/05X
	6	*
	7	* Copyright (c) 2012 Marvell Technology Ltd.
	8	* Yunfan Zhang <yfzhang@marvell.com>
	9	*
	10	* This package is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*
	14	*/
	15	#include <linux/module.h>
	16	#include <linux/param.h>
	17	#include <linux/err.h>
	18	#include <linux/platform_device.h>
	19	#include <linux/regulator/driver.h>
	20	#include <linux/regulator/machine.h>
91f23d8f HS	21	#include <linux/regulator/of_regulator.h>
91f23d8f HS	22	#include <linux/of_device.h>
49d8c599 YZ	23	#include <linux/i2c.h>
	24	#include <linux/slab.h>
	25	#include <linux/regmap.h>
	26	#include <linux/regulator/fan53555.h>
	27
	28	/* Voltage setting */
	29	#define FAN53555_VSEL0 0x00
	30	#define FAN53555_VSEL1 0x01
	31	/* Control register */
	32	#define FAN53555_CONTROL 0x02
	33	/* IC Type */
	34	#define FAN53555_ID1 0x03
	35	/* IC mask version */
	36	#define FAN53555_ID2 0x04
	37	/* Monitor register */
	38	#define FAN53555_MONITOR 0x05
	39
	40	/* VSEL bit definitions */
	41	#define VSEL_BUCK_EN (1 << 7)
	42	#define VSEL_MODE (1 << 6)
	43	#define VSEL_NSEL_MASK 0x3F
	44	/* Chip ID and Verison */
	45	#define DIE_ID 0x0F /* ID1 */
	46	#define DIE_REV 0x0F /* ID2 */
	47	/* Control bit definitions */
	48	#define CTL_OUTPUT_DISCHG (1 << 7)
	49	#define CTL_SLEW_MASK (0x7 << 4)
	50	#define CTL_SLEW_SHIFT 4
	51	#define CTL_RESET (1 << 2)
	52
	53	#define FAN53555_NVOLTAGES 64 /* Numbers of voltages */
	54
ee30928a HS	55	enum fan53555_vendor {
	56	FAN53555_VENDOR_FAIRCHILD = 0,
	57	FAN53555_VENDOR_SILERGY,
	58	};
	59
49d8c599 YZ	60	/* IC Type */
	61	enum {
	62	FAN53555_CHIP_ID_00 = 0,
	63	FAN53555_CHIP_ID_01,
	64	FAN53555_CHIP_ID_02,
	65	FAN53555_CHIP_ID_03,
	66	FAN53555_CHIP_ID_04,
	67	FAN53555_CHIP_ID_05,
	68	};
	69
ee30928a HS	70	enum {
	71	SILERGY_SYR82X = 8,
	72	};
	73
49d8c599	74	struct fan53555_device_info {
ee30928a	75	enum fan53555_vendor vendor;
49d8c599 YZ	76	struct regmap *regmap;
	77	struct device *dev;
	78	struct regulator_desc desc;
	79	struct regulator_dev *rdev;
	80	struct regulator_init_data *regulator;
	81	/* IC Type and Rev */
	82	int chip_id;
	83	int chip_rev;
	84	/* Voltage setting register */
	85	unsigned int vol_reg;
	86	unsigned int sleep_reg;
	87	/* Voltage range and step(linear) */
	88	unsigned int vsel_min;
49d8c599 YZ	89	unsigned int vsel_step;
	90	/* Voltage slew rate limiting */
	91	unsigned int slew_rate;
	92	/* Sleep voltage cache */
	93	unsigned int sleep_vol_cache;
	94	};
	95
	96	static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
	97	{
	98	struct fan53555_device_info *di = rdev_get_drvdata(rdev);
	99	int ret;
	100
	101	if (di->sleep_vol_cache == uV)
	102	return 0;
	103	ret = regulator_map_voltage_linear(rdev, uV, uV);
	104	if (ret < 0)
145fe1e1	105	return ret;
49d8c599 YZ	106	ret = regmap_update_bits(di->regmap, di->sleep_reg,
	107	VSEL_NSEL_MASK, ret);
	108	if (ret < 0)
145fe1e1	109	return ret;
49d8c599 YZ	110	/* Cache the sleep voltage setting.
	111	* Might not be the real voltage which is rounded */
	112	di->sleep_vol_cache = uV;
	113
	114	return 0;
	115	}
	116
	117	static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode)
	118	{
	119	struct fan53555_device_info *di = rdev_get_drvdata(rdev);
	120
	121	switch (mode) {
	122	case REGULATOR_MODE_FAST:
	123	regmap_update_bits(di->regmap, di->vol_reg,
	124	VSEL_MODE, VSEL_MODE);
	125	break;
	126	case REGULATOR_MODE_NORMAL:
	127	regmap_update_bits(di->regmap, di->vol_reg, VSEL_MODE, 0);
	128	break;
	129	default:
	130	return -EINVAL;
	131	}
	132	return 0;
	133	}
	134
	135	static unsigned int fan53555_get_mode(struct regulator_dev *rdev)
	136	{
	137	struct fan53555_device_info *di = rdev_get_drvdata(rdev);
	138	unsigned int val;
	139	int ret = 0;
	140
	141	ret = regmap_read(di->regmap, di->vol_reg, &val);
	142	if (ret < 0)
	143	return ret;
	144	if (val & VSEL_MODE)
	145	return REGULATOR_MODE_FAST;
	146	else
	147	return REGULATOR_MODE_NORMAL;
	148	}
	149
121b567d	150	static const int slew_rates[] = {
dd7e71fb HS	151	64000,
	152	32000,
	153	16000,
	154	8000,
	155	4000,
	156	2000,
	157	1000,
	158	500,
	159	};
	160
	161	static int fan53555_set_ramp(struct regulator_dev *rdev, int ramp)
	162	{
	163	struct fan53555_device_info *di = rdev_get_drvdata(rdev);
	164	int regval = -1, i;
	165
	166	for (i = 0; i < ARRAY_SIZE(slew_rates); i++) {
	167	if (ramp <= slew_rates[i])
	168	regval = i;
	169	else
	170	break;
	171	}
	172
	173	if (regval < 0) {
	174	dev_err(di->dev, "unsupported ramp value %d\n", ramp);
	175	return -EINVAL;
	176	}
	177
	178	return regmap_update_bits(di->regmap, FAN53555_CONTROL,
	179	CTL_SLEW_MASK, regval << CTL_SLEW_SHIFT);
	180	}
	181
49d8c599 YZ	182	static struct regulator_ops fan53555_regulator_ops = {
	183	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	184	.get_voltage_sel = regulator_get_voltage_sel_regmap,
fda87a42	185	.set_voltage_time_sel = regulator_set_voltage_time_sel,
49d8c599 YZ	186	.map_voltage = regulator_map_voltage_linear,
	187	.list_voltage = regulator_list_voltage_linear,
	188	.set_suspend_voltage = fan53555_set_suspend_voltage,
	189	.enable = regulator_enable_regmap,
	190	.disable = regulator_disable_regmap,
	191	.is_enabled = regulator_is_enabled_regmap,
	192	.set_mode = fan53555_set_mode,
	193	.get_mode = fan53555_get_mode,
dd7e71fb	194	.set_ramp_delay = fan53555_set_ramp,
49d8c599 YZ	195	};
49d8c599 YZ	196
ee30928a HS	197	static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
	198	{
	199	/* Init voltage range and step */
	200	switch (di->chip_id) {
	201	case FAN53555_CHIP_ID_00:
	202	case FAN53555_CHIP_ID_01:
	203	case FAN53555_CHIP_ID_03:
	204	case FAN53555_CHIP_ID_05:
	205	di->vsel_min = 600000;
	206	di->vsel_step = 10000;
	207	break;
	208	case FAN53555_CHIP_ID_04:
	209	di->vsel_min = 603000;
	210	di->vsel_step = 12826;
	211	break;
	212	default:
	213	dev_err(di->dev,
	214	"Chip ID %d not supported!\n", di->chip_id);
	215	return -EINVAL;
	216	}
	217
	218	return 0;
	219	}
	220
	221	static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
	222	{
	223	/* Init voltage range and step */
	224	switch (di->chip_id) {
	225	case SILERGY_SYR82X:
	226	di->vsel_min = 712500;
	227	di->vsel_step = 12500;
	228	break;
	229	default:
	230	dev_err(di->dev,
	231	"Chip ID %d not supported!\n", di->chip_id);
	232	return -EINVAL;
	233	}
	234
	235	return 0;
	236	}
	237
49d8c599 YZ	238	/* For 00,01,03,05 options:
	239	* VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
	240	* For 04 option:
	241	* VOUT = 0.603V + NSELx * 12.826mV, from 0.603 to 1.411V.
	242	* */
	243	static int fan53555_device_setup(struct fan53555_device_info *di,
	244	struct fan53555_platform_data *pdata)
	245	{
ee30928a HS	246	int ret = 0;
ee30928a HS	247
49d8c599 YZ	248	/* Setup voltage control register */
	249	switch (pdata->sleep_vsel_id) {
	250	case FAN53555_VSEL_ID_0:
	251	di->sleep_reg = FAN53555_VSEL0;
	252	di->vol_reg = FAN53555_VSEL1;
	253	break;
	254	case FAN53555_VSEL_ID_1:
	255	di->sleep_reg = FAN53555_VSEL1;
	256	di->vol_reg = FAN53555_VSEL0;
	257	break;
	258	default:
	259	dev_err(di->dev, "Invalid VSEL ID!\n");
	260	return -EINVAL;
	261	}
ee30928a HS	262
	263	switch (di->vendor) {
	264	case FAN53555_VENDOR_FAIRCHILD:
	265	ret = fan53555_voltages_setup_fairchild(di);
49d8c599	266	break;
ee30928a HS	267	case FAN53555_VENDOR_SILERGY:
ee30928a HS	268	ret = fan53555_voltages_setup_silergy(di);
49d8c599 YZ	269	break;
49d8c599 YZ	270	default:
fe230531	271	dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
49d8c599 YZ	272	return -EINVAL;
49d8c599 YZ	273	}
dd7e71fb	274
ee30928a	275	return ret;
49d8c599 YZ	276	}
	277
	278	static int fan53555_regulator_register(struct fan53555_device_info *di,
	279	struct regulator_config *config)
	280	{
	281	struct regulator_desc *rdesc = &di->desc;
	282
	283	rdesc->name = "fan53555-reg";
3415d601	284	rdesc->supply_name = "vin";
49d8c599 YZ	285	rdesc->ops = &fan53555_regulator_ops;
	286	rdesc->type = REGULATOR_VOLTAGE;
	287	rdesc->n_voltages = FAN53555_NVOLTAGES;
	288	rdesc->enable_reg = di->vol_reg;
	289	rdesc->enable_mask = VSEL_BUCK_EN;
	290	rdesc->min_uV = di->vsel_min;
	291	rdesc->uV_step = di->vsel_step;
	292	rdesc->vsel_reg = di->vol_reg;
	293	rdesc->vsel_mask = VSEL_NSEL_MASK;
	294	rdesc->owner = THIS_MODULE;
	295
b15f5f76	296	di->rdev = devm_regulator_register(di->dev, &di->desc, config);
8c6ffba0	297	return PTR_ERR_OR_ZERO(di->rdev);
49d8c599 YZ	298	}
49d8c599 YZ	299
121b567d	300	static const struct regmap_config fan53555_regmap_config = {
49d8c599 YZ	301	.reg_bits = 8,
	302	.val_bits = 8,
	303	};
	304
91f23d8f	305	static struct fan53555_platform_data fan53555_parse_dt(struct device dev,
072e78b1 JMC	306	struct device_node *np,
072e78b1 JMC	307	const struct regulator_desc *desc)
91f23d8f HS	308	{
	309	struct fan53555_platform_data *pdata;
	310	int ret;
	311	u32 tmp;
	312
	313	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	314	if (!pdata)
	315	return NULL;
	316
072e78b1	317	pdata->regulator = of_get_regulator_init_data(dev, np, desc);
91f23d8f HS	318
	319	ret = of_property_read_u32(np, "fcs,suspend-voltage-selector",
	320	&tmp);
	321	if (!ret)
	322	pdata->sleep_vsel_id = tmp;
	323
	324	return pdata;
	325	}
	326
	327	static const struct of_device_id fan53555_dt_ids[] = {
	328	{
	329	.compatible = "fcs,fan53555",
ee30928a HS	330	.data = (void *)FAN53555_VENDOR_FAIRCHILD
	331	}, {
	332	.compatible = "silergy,syr827",
	333	.data = (void *)FAN53555_VENDOR_SILERGY,
	334	}, {
	335	.compatible = "silergy,syr828",
	336	.data = (void *)FAN53555_VENDOR_SILERGY,
91f23d8f HS	337	},
	338	{ }
	339	};
	340	MODULE_DEVICE_TABLE(of, fan53555_dt_ids);
	341
a5023574	342	static int fan53555_regulator_probe(struct i2c_client *client,
49d8c599 YZ	343	const struct i2c_device_id *id)
49d8c599 YZ	344	{
91f23d8f	345	struct device_node *np = client->dev.of_node;
49d8c599 YZ	346	struct fan53555_device_info *di;
	347	struct fan53555_platform_data *pdata;
	348	struct regulator_config config = { };
	349	unsigned int val;
	350	int ret;
	351
072e78b1 JMC	352	di = devm_kzalloc(&client->dev, sizeof(struct fan53555_device_info),
	353	GFP_KERNEL);
	354	if (!di)
	355	return -ENOMEM;
	356
dff91d0b	357	pdata = dev_get_platdata(&client->dev);
91f23d8f	358	if (!pdata)
072e78b1	359	pdata = fan53555_parse_dt(&client->dev, np, &di->desc);
91f23d8f	360
49d8c599 YZ	361	if (!pdata \|\| !pdata->regulator) {
	362	dev_err(&client->dev, "Platform data not found!\n");
	363	return -ENODEV;
	364	}
	365
e13426bf	366	di->regulator = pdata->regulator;
ee30928a HS	367	if (client->dev.of_node) {
	368	const struct of_device_id *match;
	369
	370	match = of_match_device(of_match_ptr(fan53555_dt_ids),
	371	&client->dev);
	372	if (!match)
	373	return -ENODEV;
	374
6f34163c	375	di->vendor = (unsigned long) match->data;
ee30928a	376	} else {
91f23d8f HS	377	/* if no ramp constraint set, get the pdata ramp_delay */
	378	if (!di->regulator->constraints.ramp_delay) {
	379	int slew_idx = (pdata->slew_rate & 0x7)
	380	? pdata->slew_rate : 0;
dd7e71fb	381
91f23d8f HS	382	di->regulator->constraints.ramp_delay
	383	= slew_rates[slew_idx];
	384	}
ee30928a HS	385
ee30928a HS	386	di->vendor = id->driver_data;
dd7e71fb HS	387	}
dd7e71fb HS	388
49d8c599 YZ	389	di->regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config);
	390	if (IS_ERR(di->regmap)) {
	391	dev_err(&client->dev, "Failed to allocate regmap!\n");
	392	return PTR_ERR(di->regmap);
	393	}
	394	di->dev = &client->dev;
49d8c599 YZ	395	i2c_set_clientdata(client, di);
	396	/* Get chip ID */
	397	ret = regmap_read(di->regmap, FAN53555_ID1, &val);
	398	if (ret < 0) {
	399	dev_err(&client->dev, "Failed to get chip ID!\n");
145fe1e1	400	return ret;
49d8c599 YZ	401	}
	402	di->chip_id = val & DIE_ID;
	403	/* Get chip revision */
	404	ret = regmap_read(di->regmap, FAN53555_ID2, &val);
	405	if (ret < 0) {
	406	dev_err(&client->dev, "Failed to get chip Rev!\n");
145fe1e1	407	return ret;
49d8c599 YZ	408	}
	409	di->chip_rev = val & DIE_REV;
	410	dev_info(&client->dev, "FAN53555 Option[%d] Rev[%d] Detected!\n",
	411	di->chip_id, di->chip_rev);
	412	/* Device init */
	413	ret = fan53555_device_setup(di, pdata);
	414	if (ret < 0) {
	415	dev_err(&client->dev, "Failed to setup device!\n");
	416	return ret;
	417	}
	418	/* Register regulator */
	419	config.dev = di->dev;
	420	config.init_data = di->regulator;
	421	config.regmap = di->regmap;
	422	config.driver_data = di;
91f23d8f HS	423	config.of_node = np;
91f23d8f HS	424
49d8c599 YZ	425	ret = fan53555_regulator_register(di, &config);
	426	if (ret < 0)
	427	dev_err(&client->dev, "Failed to register regulator!\n");
	428	return ret;
	429
	430	}
	431
49d8c599	432	static const struct i2c_device_id fan53555_id[] = {
ee30928a HS	433	{
	434	.name = "fan53555",
	435	.driver_data = FAN53555_VENDOR_FAIRCHILD
	436	}, {
	437	.name = "syr82x",
	438	.driver_data = FAN53555_VENDOR_SILERGY
	439	},
49d8c599 YZ	440	{ },
49d8c599 YZ	441	};
e80c47bd	442	MODULE_DEVICE_TABLE(i2c, fan53555_id);
49d8c599 YZ	443
	444	static struct i2c_driver fan53555_regulator_driver = {
	445	.driver = {
	446	.name = "fan53555-regulator",
91f23d8f	447	.of_match_table = of_match_ptr(fan53555_dt_ids),
49d8c599 YZ	448	},
49d8c599 YZ	449	.probe = fan53555_regulator_probe,
49d8c599 YZ	450	.id_table = fan53555_id,
	451	};
	452
	453	module_i2c_driver(fan53555_regulator_driver);
	454
	455	MODULE_AUTHOR("Yunfan Zhang <yfzhang@marvell.com>");
	456	MODULE_DESCRIPTION("FAN53555 regulator driver");
	457	MODULE_LICENSE("GPL v2");