[mirror_ubuntu-zesty-kernel.git] / drivers / regulator / pv88090-regulator.c

/*
 * pv88090-regulator.c - Regulator device driver for PV88090
 * Copyright (C) 2015  Powerventure Semiconductor Ltd.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regmap.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/regulator/of_regulator.h>
#include <linux/proc_fs.h>
#include <linux/uaccess.h>
#include "pv88090-regulator.h"

#define PV88090_MAX_REGULATORS	5

/* PV88090 REGULATOR IDs */
enum {
	/* BUCKs */
	PV88090_ID_BUCK1,
	PV88090_ID_BUCK2,
	PV88090_ID_BUCK3,

	/* LDOs */
	PV88090_ID_LDO1,
	PV88090_ID_LDO2,
};

struct pv88090_regulator {
	struct regulator_desc desc;
	/* Current limiting */
	unsigned	n_current_limits;
	const int	*current_limits;
	unsigned int limit_mask;
	unsigned int conf;
	unsigned int conf2;
};

struct pv88090 {
	struct device *dev;
	struct regmap *regmap;
	struct regulator_dev *rdev[PV88090_MAX_REGULATORS];
};

struct pv88090_buck_voltage {
	int min_uV;
	int max_uV;
	int uV_step;
};

static const struct regmap_config pv88090_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
};

/* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
 *  Entry indexes corresponds to register values.
 */

static const int pv88090_buck1_limits[] = {
	 220000,  440000,  660000,  880000, 1100000, 1320000, 1540000, 1760000,
	1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000,
	3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000,
	5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 7040000
};

static const int pv88090_buck23_limits[] = {
	1496000, 2393000, 3291000, 4189000
};

static const struct pv88090_buck_voltage pv88090_buck_vol[3] = {
	{
		.min_uV = 600000,
		.max_uV = 1393750,
		.uV_step = 6250,
	},

	{
		.min_uV = 1400000,
		.max_uV = 2193750,
		.uV_step = 6250,
	},
	{
		.min_uV = 1250000,
		.max_uV = 2837500,
		.uV_step = 12500,
	},
};

static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev)
{
	struct pv88090_regulator *info = rdev_get_drvdata(rdev);
	unsigned int data;
	int ret, mode = 0;

	ret = regmap_read(rdev->regmap, info->conf, &data);
	if (ret < 0)
		return ret;

	switch (data & PV88090_BUCK1_MODE_MASK) {
	case PV88090_BUCK_MODE_SYNC:
		mode = REGULATOR_MODE_FAST;
		break;
	case PV88090_BUCK_MODE_AUTO:
		mode = REGULATOR_MODE_NORMAL;
		break;
	case PV88090_BUCK_MODE_SLEEP:
		mode = REGULATOR_MODE_STANDBY;
		break;
	}

	return mode;
}

static int pv88090_buck_set_mode(struct regulator_dev *rdev,
					unsigned int mode)
{
	struct pv88090_regulator *info = rdev_get_drvdata(rdev);
	int val = 0;

	switch (mode) {
	case REGULATOR_MODE_FAST:
		val = PV88090_BUCK_MODE_SYNC;
		break;
	case REGULATOR_MODE_NORMAL:
		val = PV88090_BUCK_MODE_AUTO;
		break;
	case REGULATOR_MODE_STANDBY:
		val = PV88090_BUCK_MODE_SLEEP;
		break;
	default:
		return -EINVAL;
	}

	return regmap_update_bits(rdev->regmap, info->conf,
					PV88090_BUCK1_MODE_MASK, val);
}

static int pv88090_set_current_limit(struct regulator_dev *rdev, int min,
				    int max)
{
	struct pv88090_regulator *info = rdev_get_drvdata(rdev);
	int i;

	/* search for closest to maximum */
	for (i = info->n_current_limits; i >= 0; i--) {
		if (min <= info->current_limits[i]
			&& max >= info->current_limits[i]) {
			return regmap_update_bits(rdev->regmap,
				info->conf,
				info->limit_mask,
				i << PV88090_BUCK1_ILIM_SHIFT);
		}
	}

	return -EINVAL;
}

static int pv88090_get_current_limit(struct regulator_dev *rdev)
{
	struct pv88090_regulator *info = rdev_get_drvdata(rdev);
	unsigned int data;
	int ret;

	ret = regmap_read(rdev->regmap, info->conf, &data);
	if (ret < 0)
		return ret;

	data = (data & info->limit_mask) >> PV88090_BUCK1_ILIM_SHIFT;
	return info->current_limits[data];
}

static struct regulator_ops pv88090_buck_ops = {
	.get_mode = pv88090_buck_get_mode,
	.set_mode = pv88090_buck_set_mode,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.set_current_limit = pv88090_set_current_limit,
	.get_current_limit = pv88090_get_current_limit,
};

static struct regulator_ops pv88090_ldo_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear,
};

#define PV88090_BUCK(chip, regl_name, min, step, max, limits_array) \
{\
	.desc	=	{\
		.id = chip##_ID_##regl_name,\
		.name = __stringify(chip##_##regl_name),\
		.of_match = of_match_ptr(#regl_name),\
		.regulators_node = of_match_ptr("regulators"),\
		.type = REGULATOR_VOLTAGE,\
		.owner = THIS_MODULE,\
		.ops = &pv88090_buck_ops,\
		.min_uV = min, \
		.uV_step = step, \
		.n_voltages = ((max) - (min))/(step) + 1, \
		.enable_reg = PV88090_REG_##regl_name##_CONF0, \
		.enable_mask = PV88090_##regl_name##_EN, \
		.vsel_reg = PV88090_REG_##regl_name##_CONF0, \
		.vsel_mask = PV88090_V##regl_name##_MASK, \
	},\
	.current_limits = limits_array, \
	.n_current_limits = ARRAY_SIZE(limits_array), \
	.limit_mask = PV88090_##regl_name##_ILIM_MASK, \
	.conf = PV88090_REG_##regl_name##_CONF1, \
	.conf2 = PV88090_REG_##regl_name##_CONF2, \
}

#define PV88090_LDO(chip, regl_name, min, step, max) \
{\
	.desc	=	{\
		.id = chip##_ID_##regl_name,\
		.name = __stringify(chip##_##regl_name),\
		.of_match = of_match_ptr(#regl_name),\
		.regulators_node = of_match_ptr("regulators"),\
		.type = REGULATOR_VOLTAGE,\
		.owner = THIS_MODULE,\
		.ops = &pv88090_ldo_ops,\
		.min_uV = min, \
		.uV_step = step, \
		.n_voltages = ((max) - (min))/(step) + 1, \
		.enable_reg = PV88090_REG_##regl_name##_CONT, \
		.enable_mask = PV88090_##regl_name##_EN, \
		.vsel_reg = PV88090_REG_##regl_name##_CONT, \
		.vsel_mask = PV88090_V##regl_name##_MASK, \
	},\
}

static struct pv88090_regulator pv88090_regulator_info[] = {
	PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750,
		pv88090_buck1_limits),
	PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750,
		pv88090_buck23_limits),
	PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750,
		pv88090_buck23_limits),
	PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000),
	PV88090_LDO(PV88090, LDO2,  650000, 25000, 2225000),
};

static irqreturn_t pv88090_irq_handler(int irq, void *data)
{
	struct pv88090 *chip = data;
	int i, reg_val, err, ret = IRQ_NONE;

	err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, &reg_val);
	if (err < 0)
		goto error_i2c;

	if (reg_val & PV88090_E_VDD_FLT) {
		for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
			if (chip->rdev[i] != NULL) {
				regulator_notifier_call_chain(chip->rdev[i],
					REGULATOR_EVENT_UNDER_VOLTAGE,
					NULL);
			}
		}

		err = regmap_update_bits(chip->regmap, PV88090_REG_EVENT_A,
			PV88090_E_VDD_FLT, PV88090_E_VDD_FLT);
		if (err < 0)
			goto error_i2c;

		ret = IRQ_HANDLED;
	}

	if (reg_val & PV88090_E_OVER_TEMP) {
		for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
			if (chip->rdev[i] != NULL) {
				regulator_notifier_call_chain(chip->rdev[i],
					REGULATOR_EVENT_OVER_TEMP,
					NULL);
			}
		}

		err = regmap_update_bits(chip->regmap, PV88090_REG_EVENT_A,
			PV88090_E_OVER_TEMP, PV88090_E_OVER_TEMP);
		if (err < 0)
			goto error_i2c;

		ret = IRQ_HANDLED;
	}

	return ret;

error_i2c:
	dev_err(chip->dev, "I2C error : %d\n", err);
	return IRQ_NONE;
}

/*
 * I2C driver interface functions
 */
static int pv88090_i2c_probe(struct i2c_client *i2c,
		const struct i2c_device_id *id)
{
	struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
	struct pv88090 *chip;
	struct regulator_config config = { };
	int error, i, ret = 0;
	unsigned int conf2, range, index;

	chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL);
	if (!chip)
		return -ENOMEM;

	chip->dev = &i2c->dev;
	chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_regmap_config);
	if (IS_ERR(chip->regmap)) {
		error = PTR_ERR(chip->regmap);
		dev_err(chip->dev, "Failed to allocate register map: %d\n",
			error);
		return error;
	}

	i2c_set_clientdata(i2c, chip);

	if (i2c->irq != 0) {
		ret = regmap_write(chip->regmap, PV88090_REG_MASK_A, 0xFF);
		if (ret < 0) {
			dev_err(chip->dev,
				"Failed to mask A reg: %d\n", ret);
			return ret;
		}

		ret = regmap_write(chip->regmap, PV88090_REG_MASK_B, 0xFF);
		if (ret < 0) {
			dev_err(chip->dev,
				"Failed to mask B reg: %d\n", ret);
			return ret;
		}

		ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
					pv88090_irq_handler,
					IRQF_TRIGGER_LOW|IRQF_ONESHOT,
					"pv88090", chip);
		if (ret != 0) {
			dev_err(chip->dev, "Failed to request IRQ: %d\n",
				i2c->irq);
			return ret;
		}

		ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A,
			PV88090_M_VDD_FLT | PV88090_M_OVER_TEMP, 0);
		if (ret < 0) {
			dev_err(chip->dev,
				"Failed to update mask reg: %d\n", ret);
			return ret;
		}

	} else {
		dev_warn(chip->dev, "No IRQ configured\n");
	}

	config.dev = chip->dev;
	config.regmap = chip->regmap;

	for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
		if (init_data)
			config.init_data = &init_data[i];

		if (i == PV88090_ID_BUCK2 || i == PV88090_ID_BUCK3) {
			ret = regmap_read(chip->regmap,
				pv88090_regulator_info[i].conf2, &conf2);
			if (ret < 0)
				return ret;

			conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) &
				PV88090_BUCK_VDAC_RANGE_MASK;

			ret = regmap_read(chip->regmap,
				PV88090_REG_BUCK_FOLD_RANGE, &range);
			if (ret < 0)
				return ret;

			range = (range >>
				 (PV88080_BUCK_VRANGE_GAIN_SHIFT + i - 1)) &
				PV88080_BUCK_VRANGE_GAIN_MASK;
			index = ((range << 1) | conf2);

			pv88090_regulator_info[i].desc.min_uV
				= pv88090_buck_vol[index].min_uV;
			pv88090_regulator_info[i].desc.uV_step
				= pv88090_buck_vol[index].uV_step;
			pv88090_regulator_info[i].desc.n_voltages
				= ((pv88090_buck_vol[index].max_uV)
				- (pv88090_buck_vol[index].min_uV))
				/(pv88090_buck_vol[index].uV_step) + 1;
		}

		config.driver_data = (void *)&pv88090_regulator_info[i];
		chip->rdev[i] = devm_regulator_register(chip->dev,
			&pv88090_regulator_info[i].desc, &config);
		if (IS_ERR(chip->rdev[i])) {
			dev_err(chip->dev,
				"Failed to register PV88090 regulator\n");
			return PTR_ERR(chip->rdev[i]);
		}
	}

	return 0;
}

static const struct i2c_device_id pv88090_i2c_id[] = {
	{"pv88090", 0},
	{},
};
MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id);

#ifdef CONFIG_OF
static const struct of_device_id pv88090_dt_ids[] = {
	{ .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] },
	{},
};
MODULE_DEVICE_TABLE(of, pv88090_dt_ids);
#endif

static struct i2c_driver pv88090_regulator_driver = {
	.driver = {
		.name = "pv88090",
		.of_match_table = of_match_ptr(pv88090_dt_ids),
	},
	.probe = pv88090_i2c_probe,
	.id_table = pv88090_i2c_id,
};

module_i2c_driver(pv88090_regulator_driver);

MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090");
MODULE_LICENSE("GPL");
Commit	Line	Data
c90456e3 JB	1	/*
	2	* pv88090-regulator.c - Regulator device driver for PV88090
	3	* Copyright (C) 2015 Powerventure Semiconductor Ltd.
	4	*
	5	* This program is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU General Public License
	7	* as published by the Free Software Foundation; either version 2
	8	* of the License, or (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*/
	15
	16	#include <linux/err.h>
	17	#include <linux/gpio.h>
	18	#include <linux/i2c.h>
	19	#include <linux/module.h>
	20	#include <linux/init.h>
	21	#include <linux/slab.h>
	22	#include <linux/regulator/driver.h>
	23	#include <linux/regulator/machine.h>
	24	#include <linux/regmap.h>
	25	#include <linux/irq.h>
	26	#include <linux/interrupt.h>
	27	#include <linux/regulator/of_regulator.h>
	28	#include <linux/proc_fs.h>
	29	#include <linux/uaccess.h>
	30	#include "pv88090-regulator.h"
	31
	32	#define PV88090_MAX_REGULATORS 5
	33
	34	/* PV88090 REGULATOR IDs */
	35	enum {
	36	/* BUCKs */
	37	PV88090_ID_BUCK1,
	38	PV88090_ID_BUCK2,
	39	PV88090_ID_BUCK3,
	40
	41	/* LDOs */
	42	PV88090_ID_LDO1,
	43	PV88090_ID_LDO2,
	44	};
	45
	46	struct pv88090_regulator {
	47	struct regulator_desc desc;
	48	/* Current limiting */
	49	unsigned n_current_limits;
	50	const int *current_limits;
	51	unsigned int limit_mask;
	52	unsigned int conf;
	53	unsigned int conf2;
	54	};
	55
	56	struct pv88090 {
	57	struct device *dev;
	58	struct regmap *regmap;
	59	struct regulator_dev *rdev[PV88090_MAX_REGULATORS];
	60	};
	61
	62	struct pv88090_buck_voltage {
	63	int min_uV;
	64	int max_uV;
65	int uV_step;
66	};
67
68	static const struct regmap_config pv88090_regmap_config = {
69	.reg_bits = 8,
70	.val_bits = 8,
71	};
72
73	/* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
74	* Entry indexes corresponds to register values.
75	*/
76
77	static const int pv88090_buck1_limits[] = {
78	220000, 440000, 660000, 880000, 1100000, 1320000, 1540000, 1760000,
79	1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000,
80	3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000,
81	5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 7040000
82	};
83
84	static const int pv88090_buck23_limits[] = {
85	1496000, 2393000, 3291000, 4189000
86	};
87
88	static const struct pv88090_buck_voltage pv88090_buck_vol[3] = {
89	{
90	.min_uV = 600000,
91	.max_uV = 1393750,
92	.uV_step = 6250,
93	},
94
95	{
96	.min_uV = 1400000,
97	.max_uV = 2193750,
98	.uV_step = 6250,
99	},
100	{
101	.min_uV = 1250000,
102	.max_uV = 2837500,
103	.uV_step = 12500,
104	},
105	};
106
107	static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev)
108	{
109	struct pv88090_regulator *info = rdev_get_drvdata(rdev);
110	unsigned int data;
111	int ret, mode = 0;
112
113	ret = regmap_read(rdev->regmap, info->conf, &data);
114	if (ret < 0)
115	return ret;
116
117	switch (data & PV88090_BUCK1_MODE_MASK) {
118	case PV88090_BUCK_MODE_SYNC:
119	mode = REGULATOR_MODE_FAST;
120	break;
121	case PV88090_BUCK_MODE_AUTO:
122	mode = REGULATOR_MODE_NORMAL;
123	break;
124	case PV88090_BUCK_MODE_SLEEP:
125	mode = REGULATOR_MODE_STANDBY;
126	break;
127	}
128
129	return mode;
130	}
131
132	static int pv88090_buck_set_mode(struct regulator_dev *rdev,
133	unsigned int mode)
134	{
135	struct pv88090_regulator *info = rdev_get_drvdata(rdev);
136	int val = 0;
137
138	switch (mode) {
139	case REGULATOR_MODE_FAST:
140	val = PV88090_BUCK_MODE_SYNC;
141	break;
142	case REGULATOR_MODE_NORMAL:
143	val = PV88090_BUCK_MODE_AUTO;
144	break;
145	case REGULATOR_MODE_STANDBY:
146	val = PV88090_BUCK_MODE_SLEEP;
147	break;
148	default:
149	return -EINVAL;
150	}
151
152	return regmap_update_bits(rdev->regmap, info->conf,
153	PV88090_BUCK1_MODE_MASK, val);
154	}
155
156	static int pv88090_set_current_limit(struct regulator_dev *rdev, int min,
157	int max)
158	{
159	struct pv88090_regulator *info = rdev_get_drvdata(rdev);
160	int i;
161
162	/* search for closest to maximum */
163	for (i = info->n_current_limits; i >= 0; i--) {
164	if (min <= info->current_limits[i]
165	&& max >= info->current_limits[i]) {
166	return regmap_update_bits(rdev->regmap,
167	info->conf,
168	info->limit_mask,
169	i << PV88090_BUCK1_ILIM_SHIFT);
170	}
171	}
172
173	return -EINVAL;
174	}
175
176	static int pv88090_get_current_limit(struct regulator_dev *rdev)
177	{
178	struct pv88090_regulator *info = rdev_get_drvdata(rdev);
179	unsigned int data;
180	int ret;
181
182	ret = regmap_read(rdev->regmap, info->conf, &data);
183	if (ret < 0)
184	return ret;
185
186	data = (data & info->limit_mask) >> PV88090_BUCK1_ILIM_SHIFT;
187	return info->current_limits[data];
188	}
189
190	static struct regulator_ops pv88090_buck_ops = {
191	.get_mode = pv88090_buck_get_mode,
192	.set_mode = pv88090_buck_set_mode,
193	.enable = regulator_enable_regmap,
194	.disable = regulator_disable_regmap,
195	.is_enabled = regulator_is_enabled_regmap,
196	.set_voltage_sel = regulator_set_voltage_sel_regmap,
197	.get_voltage_sel = regulator_get_voltage_sel_regmap,
198	.list_voltage = regulator_list_voltage_linear,
199	.set_current_limit = pv88090_set_current_limit,
200	.get_current_limit = pv88090_get_current_limit,
201	};
202
203	static struct regulator_ops pv88090_ldo_ops = {
204	.enable = regulator_enable_regmap,
205	.disable = regulator_disable_regmap,
206	.is_enabled = regulator_is_enabled_regmap,
207	.set_voltage_sel = regulator_set_voltage_sel_regmap,
208	.get_voltage_sel = regulator_get_voltage_sel_regmap,
209	.list_voltage = regulator_list_voltage_linear,
210	};
211
212	#define PV88090_BUCK(chip, regl_name, min, step, max, limits_array) \
213	{\
214	.desc = {\
215	.id = chip##_ID_##regl_name,\
216	.name = __stringify(chip##_##regl_name),\
217	.of_match = of_match_ptr(#regl_name),\
218	.regulators_node = of_match_ptr("regulators"),\
219	.type = REGULATOR_VOLTAGE,\
220	.owner = THIS_MODULE,\
221	.ops = &pv88090_buck_ops,\
222	.min_uV = min, \
223	.uV_step = step, \
224	.n_voltages = ((max) - (min))/(step) + 1, \
225	.enable_reg = PV88090_REG_##regl_name##_CONF0, \
226	.enable_mask = PV88090_##regl_name##_EN, \
227	.vsel_reg = PV88090_REG_##regl_name##_CONF0, \
228	.vsel_mask = PV88090_V##regl_name##_MASK, \
229	},\
230	.current_limits = limits_array, \
231	.n_current_limits = ARRAY_SIZE(limits_array), \
232	.limit_mask = PV88090_##regl_name##_ILIM_MASK, \
233	.conf = PV88090_REG_##regl_name##_CONF1, \
234	.conf2 = PV88090_REG_##regl_name##_CONF2, \
235	}
236
237	#define PV88090_LDO(chip, regl_name, min, step, max) \
238	{\
239	.desc = {\
240	.id = chip##_ID_##regl_name,\
241	.name = __stringify(chip##_##regl_name),\
242	.of_match = of_match_ptr(#regl_name),\
243	.regulators_node = of_match_ptr("regulators"),\
244	.type = REGULATOR_VOLTAGE,\
245	.owner = THIS_MODULE,\
246	.ops = &pv88090_ldo_ops,\
247	.min_uV = min, \
248	.uV_step = step, \
249	.n_voltages = ((max) - (min))/(step) + 1, \
250	.enable_reg = PV88090_REG_##regl_name##_CONT, \
251	.enable_mask = PV88090_##regl_name##_EN, \
252	.vsel_reg = PV88090_REG_##regl_name##_CONT, \
253	.vsel_mask = PV88090_V##regl_name##_MASK, \
254	},\
255	}
256
257	static struct pv88090_regulator pv88090_regulator_info[] = {
258	PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750,
259	pv88090_buck1_limits),
260	PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750,
261	pv88090_buck23_limits),
262	PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750,
263	pv88090_buck23_limits),
264	PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000),
265	PV88090_LDO(PV88090, LDO2, 650000, 25000, 2225000),
266	};
267
268	static irqreturn_t pv88090_irq_handler(int irq, void *data)
269	{
270	struct pv88090 *chip = data;
271	int i, reg_val, err, ret = IRQ_NONE;
272
273	err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, &reg_val);
274	if (err < 0)
275	goto error_i2c;
276
277	if (reg_val & PV88090_E_VDD_FLT) {
278	for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
279	if (chip->rdev[i] != NULL) {
280	regulator_notifier_call_chain(chip->rdev[i],
281	REGULATOR_EVENT_UNDER_VOLTAGE,
282	NULL);
283	}
284	}
285
286	err = regmap_update_bits(chip->regmap, PV88090_REG_EVENT_A,
287	PV88090_E_VDD_FLT, PV88090_E_VDD_FLT);
288	if (err < 0)
289	goto error_i2c;
290
291	ret = IRQ_HANDLED;
292	}
293
294	if (reg_val & PV88090_E_OVER_TEMP) {
295	for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
296	if (chip->rdev[i] != NULL) {
297	regulator_notifier_call_chain(chip->rdev[i],
298	REGULATOR_EVENT_OVER_TEMP,
299	NULL);
300	}
301	}
302
303	err = regmap_update_bits(chip->regmap, PV88090_REG_EVENT_A,
304	PV88090_E_OVER_TEMP, PV88090_E_OVER_TEMP);
305	if (err < 0)
306	goto error_i2c;
307
308	ret = IRQ_HANDLED;
309	}
310
311	return ret;
312
313	error_i2c:
314	dev_err(chip->dev, "I2C error : %d\n", err);
315	return IRQ_NONE;
316	}
317
318	/*
319	* I2C driver interface functions
320	*/
321	static int pv88090_i2c_probe(struct i2c_client *i2c,
322	const struct i2c_device_id *id)
323	{
324	struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
325	struct pv88090 *chip;
326	struct regulator_config config = { };
327	int error, i, ret = 0;
328	unsigned int conf2, range, index;
329
330	chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL);
331	if (!chip)
332	return -ENOMEM;
333
334	chip->dev = &i2c->dev;
335	chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_regmap_config);
336	if (IS_ERR(chip->regmap)) {
337	error = PTR_ERR(chip->regmap);
338	dev_err(chip->dev, "Failed to allocate register map: %d\n",
339	error);
340	return error;
341	}
342
343	i2c_set_clientdata(i2c, chip);
344
345	if (i2c->irq != 0) {
346	ret = regmap_write(chip->regmap, PV88090_REG_MASK_A, 0xFF);
347	if (ret < 0) {
348	dev_err(chip->dev,
349	"Failed to mask A reg: %d\n", ret);
350	return ret;
351	}
352
353	ret = regmap_write(chip->regmap, PV88090_REG_MASK_B, 0xFF);
354	if (ret < 0) {
355	dev_err(chip->dev,
356	"Failed to mask B reg: %d\n", ret);
357	return ret;
358	}
359
ecee988a	360	ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
c90456e3 JB	361	pv88090_irq_handler,
	362	IRQF_TRIGGER_LOW\|IRQF_ONESHOT,
	363	"pv88090", chip);
	364	if (ret != 0) {
	365	dev_err(chip->dev, "Failed to request IRQ: %d\n",
	366	i2c->irq);
	367	return ret;
	368	}
	369
	370	ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A,
	371	PV88090_M_VDD_FLT \| PV88090_M_OVER_TEMP, 0);
	372	if (ret < 0) {
	373	dev_err(chip->dev,
	374	"Failed to update mask reg: %d\n", ret);
	375	return ret;
	376	}
	377
	378	} else {
	379	dev_warn(chip->dev, "No IRQ configured\n");
	380	}
	381
	382	config.dev = chip->dev;
	383	config.regmap = chip->regmap;
	384
	385	for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
	386	if (init_data)
	387	config.init_data = &init_data[i];
	388
	389	if (i == PV88090_ID_BUCK2 \|\| i == PV88090_ID_BUCK3) {
	390	ret = regmap_read(chip->regmap,
	391	pv88090_regulator_info[i].conf2, &conf2);
	392	if (ret < 0)
	393	return ret;
	394
d761c906 DC	395	conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) &
d761c906 DC	396	PV88090_BUCK_VDAC_RANGE_MASK;
c90456e3 JB	397
	398	ret = regmap_read(chip->regmap,
	399	PV88090_REG_BUCK_FOLD_RANGE, &range);
	400	if (ret < 0)
	401	return ret;
	402
d761c906 DC	403	range = (range >>
	404	(PV88080_BUCK_VRANGE_GAIN_SHIFT + i - 1)) &
	405	PV88080_BUCK_VRANGE_GAIN_MASK;
c90456e3 JB	406	index = ((range << 1) \| conf2);
	407
	408	pv88090_regulator_info[i].desc.min_uV
	409	= pv88090_buck_vol[index].min_uV;
	410	pv88090_regulator_info[i].desc.uV_step
	411	= pv88090_buck_vol[index].uV_step;
	412	pv88090_regulator_info[i].desc.n_voltages
	413	= ((pv88090_buck_vol[index].max_uV)
	414	- (pv88090_buck_vol[index].min_uV))
	415	/(pv88090_buck_vol[index].uV_step) + 1;
	416	}
	417
	418	config.driver_data = (void *)&pv88090_regulator_info[i];
	419	chip->rdev[i] = devm_regulator_register(chip->dev,
	420	&pv88090_regulator_info[i].desc, &config);
	421	if (IS_ERR(chip->rdev[i])) {
	422	dev_err(chip->dev,
	423	"Failed to register PV88090 regulator\n");
	424	return PTR_ERR(chip->rdev[i]);
	425	}
	426	}
	427
	428	return 0;
	429	}
	430
	431	static const struct i2c_device_id pv88090_i2c_id[] = {
	432	{"pv88090", 0},
	433	{},
	434	};
	435	MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id);
	436
	437	#ifdef CONFIG_OF
	438	static const struct of_device_id pv88090_dt_ids[] = {
	439	{ .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] },
	440	{},
	441	};
	442	MODULE_DEVICE_TABLE(of, pv88090_dt_ids);
	443	#endif
	444
	445	static struct i2c_driver pv88090_regulator_driver = {
	446	.driver = {
	447	.name = "pv88090",
	448	.of_match_table = of_match_ptr(pv88090_dt_ids),
	449	},
	450	.probe = pv88090_i2c_probe,
	451	.id_table = pv88090_i2c_id,
	452	};
	453
	454	module_i2c_driver(pv88090_regulator_driver);
	455
	456	MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
	457	MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090");
	458	MODULE_LICENSE("GPL");