[linux-2.6-block.git] / drivers / regulator / da9055-regulator.c

/*
* Regulator driver for DA9055 PMIC
*
* Copyright(c) 2012 Dialog Semiconductor Ltd.
*
* Author: David Dajun Chen <dchen@diasemi.com>
*
* 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/init.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/of.h>
#include <linux/regulator/of_regulator.h>

#include <linux/mfd/da9055/core.h>
#include <linux/mfd/da9055/reg.h>
#include <linux/mfd/da9055/pdata.h>

#define DA9055_MIN_UA		0
#define DA9055_MAX_UA		3

#define DA9055_LDO_MODE_SYNC	0
#define DA9055_LDO_MODE_SLEEP	1

#define DA9055_BUCK_MODE_SLEEP	1
#define DA9055_BUCK_MODE_SYNC	2
#define DA9055_BUCK_MODE_AUTO	3

/* DA9055 REGULATOR IDs */
#define DA9055_ID_BUCK1	0
#define DA9055_ID_BUCK2	1
#define DA9055_ID_LDO1		2
#define DA9055_ID_LDO2		3
#define DA9055_ID_LDO3		4
#define DA9055_ID_LDO4		5
#define DA9055_ID_LDO5		6
#define DA9055_ID_LDO6		7

/* DA9055 BUCK current limit */
static const unsigned int da9055_current_limits[] = {
	500000, 600000, 700000, 800000
};

struct da9055_conf_reg {
	int reg;
	int sel_mask;
	int en_mask;
};

struct da9055_volt_reg {
	int reg_a;
	int reg_b;
	int sl_shift;
	int v_mask;
};

struct da9055_mode_reg {
	int reg;
	int mask;
	int shift;
};

struct da9055_regulator_info {
	struct regulator_desc reg_desc;
	struct da9055_conf_reg conf;
	struct da9055_volt_reg volt;
	struct da9055_mode_reg mode;
};

struct da9055_regulator {
	struct da9055 *da9055;
	struct da9055_regulator_info *info;
	struct regulator_dev *rdev;
	enum gpio_select reg_rselect;
};

static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev)
{
	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9055_regulator_info *info = regulator->info;
	int ret, mode = 0;

	ret = da9055_reg_read(regulator->da9055, info->mode.reg);
	if (ret < 0)
		return ret;

	switch ((ret & info->mode.mask) >> info->mode.shift) {
	case DA9055_BUCK_MODE_SYNC:
		mode = REGULATOR_MODE_FAST;
		break;
	case DA9055_BUCK_MODE_AUTO:
		mode = REGULATOR_MODE_NORMAL;
		break;
	case DA9055_BUCK_MODE_SLEEP:
		mode = REGULATOR_MODE_STANDBY;
		break;
	}

	return mode;
}

static int da9055_buck_set_mode(struct regulator_dev *rdev,
					unsigned int mode)
{
	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9055_regulator_info *info = regulator->info;
	int val = 0;

	switch (mode) {
	case REGULATOR_MODE_FAST:
		val = DA9055_BUCK_MODE_SYNC << info->mode.shift;
		break;
	case REGULATOR_MODE_NORMAL:
		val = DA9055_BUCK_MODE_AUTO << info->mode.shift;
		break;
	case REGULATOR_MODE_STANDBY:
		val = DA9055_BUCK_MODE_SLEEP << info->mode.shift;
		break;
	}

	return da9055_reg_update(regulator->da9055, info->mode.reg,
				 info->mode.mask, val);
}

static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev)
{
	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9055_regulator_info *info = regulator->info;
	int ret;

	ret = da9055_reg_read(regulator->da9055, info->volt.reg_b);
	if (ret < 0)
		return ret;

	if (ret >> info->volt.sl_shift)
		return REGULATOR_MODE_STANDBY;
	else
		return REGULATOR_MODE_NORMAL;
}

static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9055_regulator_info *info = regulator->info;
	struct da9055_volt_reg volt = info->volt;
	int val = 0;

	switch (mode) {
	case REGULATOR_MODE_NORMAL:
	case REGULATOR_MODE_FAST:
		val = DA9055_LDO_MODE_SYNC;
		break;
	case REGULATOR_MODE_STANDBY:
		val = DA9055_LDO_MODE_SLEEP;
		break;
	}

	return da9055_reg_update(regulator->da9055, volt.reg_b,
				 1 << volt.sl_shift,
				 val << volt.sl_shift);
}

static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev)
{
	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9055_regulator_info *info = regulator->info;
	struct da9055_volt_reg volt = info->volt;
	int ret, sel;

	/*
	 * There are two voltage register set A & B for voltage ramping but
	 * either one of then can be active therefore we first determine
	 * the active register set.
	 */
	ret = da9055_reg_read(regulator->da9055, info->conf.reg);
	if (ret < 0)
		return ret;

	ret &= info->conf.sel_mask;

	/* Get the voltage for the active register set A/B */
	if (ret == DA9055_REGUALTOR_SET_A)
		ret = da9055_reg_read(regulator->da9055, volt.reg_a);
	else
		ret = da9055_reg_read(regulator->da9055, volt.reg_b);

	if (ret < 0)
		return ret;

	sel = (ret & volt.v_mask);
	return sel;
}

static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev,
					    unsigned int selector)
{
	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9055_regulator_info *info = regulator->info;
	int ret;

	/*
	 * Regulator register set A/B is not selected through GPIO therefore
	 * we use default register set A for voltage ramping.
	 */
	if (regulator->reg_rselect == NO_GPIO) {
		/* Select register set A */
		ret = da9055_reg_update(regulator->da9055, info->conf.reg,
					info->conf.sel_mask, DA9055_SEL_REG_A);
		if (ret < 0)
			return ret;

		/* Set the voltage */
		return da9055_reg_update(regulator->da9055, info->volt.reg_a,
					 info->volt.v_mask, selector);
	}

	/*
	 * Here regulator register set A/B is selected through GPIO.
	 * Therefore we first determine the selected register set A/B and
	 * then set the desired voltage for that register set A/B.
	 */
	ret = da9055_reg_read(regulator->da9055, info->conf.reg);
	if (ret < 0)
		return ret;

	ret &= info->conf.sel_mask;

	/* Set the voltage */
	if (ret == DA9055_REGUALTOR_SET_A)
		return da9055_reg_update(regulator->da9055, info->volt.reg_a,
					 info->volt.v_mask, selector);
	else
		return da9055_reg_update(regulator->da9055, info->volt.reg_b,
					 info->volt.v_mask, selector);
}

static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev,
						int uV)
{
	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9055_regulator_info *info = regulator->info;
	int ret;

	/* Select register set B for suspend voltage ramping. */
	if (regulator->reg_rselect == NO_GPIO) {
		ret = da9055_reg_update(regulator->da9055, info->conf.reg,
					info->conf.sel_mask, DA9055_SEL_REG_B);
		if (ret < 0)
			return ret;
	}

	ret = regulator_map_voltage_linear(rdev, uV, uV);
	if (ret < 0)
		return ret;

	return da9055_reg_update(regulator->da9055, info->volt.reg_b,
				 info->volt.v_mask, ret);
}

static int da9055_suspend_enable(struct regulator_dev *rdev)
{
	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9055_regulator_info *info = regulator->info;

	/* Select register set B for voltage ramping. */
	if (regulator->reg_rselect == NO_GPIO)
		return da9055_reg_update(regulator->da9055, info->conf.reg,
					info->conf.sel_mask, DA9055_SEL_REG_B);
	else
		return 0;
}

static int da9055_suspend_disable(struct regulator_dev *rdev)
{
	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9055_regulator_info *info = regulator->info;

	/* Diselect register set B. */
	if (regulator->reg_rselect == NO_GPIO)
		return da9055_reg_update(regulator->da9055, info->conf.reg,
					info->conf.sel_mask, DA9055_SEL_REG_A);
	else
		return 0;
}

static const struct regulator_ops da9055_buck_ops = {
	.get_mode = da9055_buck_get_mode,
	.set_mode = da9055_buck_set_mode,

	.get_current_limit = regulator_get_current_limit_regmap,
	.set_current_limit = regulator_set_current_limit_regmap,

	.get_voltage_sel = da9055_regulator_get_voltage_sel,
	.set_voltage_sel = da9055_regulator_set_voltage_sel,
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,

	.set_suspend_voltage = da9055_regulator_set_suspend_voltage,
	.set_suspend_enable = da9055_suspend_enable,
	.set_suspend_disable = da9055_suspend_disable,
	.set_suspend_mode = da9055_buck_set_mode,
};

static const struct regulator_ops da9055_ldo_ops = {
	.get_mode = da9055_ldo_get_mode,
	.set_mode = da9055_ldo_set_mode,

	.get_voltage_sel = da9055_regulator_get_voltage_sel,
	.set_voltage_sel = da9055_regulator_set_voltage_sel,
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.is_enabled = regulator_is_enabled_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,

	.set_suspend_voltage = da9055_regulator_set_suspend_voltage,
	.set_suspend_enable = da9055_suspend_enable,
	.set_suspend_disable = da9055_suspend_disable,
	.set_suspend_mode = da9055_ldo_set_mode,

};

#define DA9055_LDO(_id, step, min, max, vbits, voffset) \
{\
	.reg_desc = {\
		.name = #_id,\
		.ops = &da9055_ldo_ops,\
		.type = REGULATOR_VOLTAGE,\
		.id = DA9055_ID_##_id,\
		.n_voltages = (max - min) / step + 1 + (voffset), \
		.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
		.enable_mask = 1, \
		.min_uV = (min) * 1000,\
		.uV_step = (step) * 1000,\
		.linear_min_sel = (voffset),\
		.owner = THIS_MODULE,\
	},\
	.conf = {\
		.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
		.sel_mask = (1 << 4),\
		.en_mask = 1,\
	},\
	.volt = {\
		.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
		.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
		.sl_shift = 7,\
		.v_mask = (1 << (vbits)) - 1,\
	},\
}

#define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \
{\
	.reg_desc = {\
		.name = #_id,\
		.ops = &da9055_buck_ops,\
		.type = REGULATOR_VOLTAGE,\
		.id = DA9055_ID_##_id,\
		.n_voltages = (max - min) / step + 1 + (voffset), \
		.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
		.enable_mask = 1,\
		.min_uV = (min) * 1000,\
		.uV_step = (step) * 1000,\
		.linear_min_sel = (voffset),\
		.owner = THIS_MODULE,\
		.curr_table = da9055_current_limits,\
		.n_current_limits = ARRAY_SIZE(da9055_current_limits),\
		.csel_reg = DA9055_REG_BUCK_LIM,\
		.csel_mask = (mbits),\
	},\
	.conf = {\
		.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
		.sel_mask = (1 << 4),\
		.en_mask = 1,\
	},\
	.volt = {\
		.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
		.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
		.sl_shift = 7,\
		.v_mask = (1 << (vbits)) - 1,\
	},\
	.mode = {\
		.reg = DA9055_REG_BCORE_MODE,\
		.mask = (mbits),\
		.shift = (sbits),\
	},\
}

static struct da9055_regulator_info da9055_regulator_info[] = {
	DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2),
	DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0),
	DA9055_LDO(LDO1, 50, 900, 3300, 6, 2),
	DA9055_LDO(LDO2, 50, 900, 3300, 6, 3),
	DA9055_LDO(LDO3, 50, 900, 3300, 6, 2),
	DA9055_LDO(LDO4, 50, 900, 3300, 6, 2),
	DA9055_LDO(LDO5, 50, 900, 2750, 6, 2),
	DA9055_LDO(LDO6, 20, 900, 3300, 7, 0),
};

/*
 * Configures regulator to be controlled either through GPIO 1 or 2.
 * GPIO can control regulator state and/or select the regulator register
 * set A/B for voltage ramping.
 */
static int da9055_gpio_init(struct da9055_regulator *regulator,
			    struct regulator_config *config,
			    struct da9055_pdata *pdata, int id)
{
	struct da9055_regulator_info *info = regulator->info;
	int ret = 0;

	if (!pdata)
		return 0;

	if (pdata->gpio_ren && pdata->gpio_ren[id]) {
		char name[18];
		int gpio_mux = pdata->gpio_ren[id];

		config->ena_gpiod = pdata->ena_gpiods[id];

		/*
		 * GPI pin is muxed with regulator to control the
		 * regulator state.
		 */
		sprintf(name, "DA9055 GPI %d", gpio_mux);
		ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
					    name);
		if (ret < 0)
			goto err;

		/*
		 * Let the regulator know that its state is controlled
		 * through GPI.
		 */
		ret = da9055_reg_update(regulator->da9055, info->conf.reg,
					DA9055_E_GPI_MASK,
					pdata->reg_ren[id]
					<< DA9055_E_GPI_SHIFT);
		if (ret < 0)
			goto err;
	}

	if (pdata->gpio_rsel && pdata->gpio_rsel[id]) {
		char name[18];
		int gpio_mux = pdata->gpio_rsel[id];

		regulator->reg_rselect = pdata->reg_rsel[id];

		/*
		 * GPI pin is muxed with regulator to select the
		 * regulator register set A/B for voltage ramping.
		 */
		sprintf(name, "DA9055 GPI %d", gpio_mux);
		ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
					    name);
		if (ret < 0)
			goto err;

		/*
		 * Let the regulator know that its register set A/B
		 * will be selected through GPI for voltage ramping.
		 */
		ret = da9055_reg_update(regulator->da9055, info->conf.reg,
					DA9055_V_GPI_MASK,
					pdata->reg_rsel[id]
					<< DA9055_V_GPI_SHIFT);
	}

err:
	return ret;
}

static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data)
{
	struct da9055_regulator *regulator = data;

	regulator_notifier_call_chain(regulator->rdev,
				      REGULATOR_EVENT_OVER_CURRENT, NULL);

	return IRQ_HANDLED;
}

static inline struct da9055_regulator_info *find_regulator_info(int id)
{
	struct da9055_regulator_info *info;
	int i;

	for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) {
		info = &da9055_regulator_info[i];
		if (info->reg_desc.id == id)
			return info;
	}

	return NULL;
}

#ifdef CONFIG_OF
static struct of_regulator_match da9055_reg_matches[] = {
	{ .name = "BUCK1", },
	{ .name = "BUCK2", },
	{ .name = "LDO1", },
	{ .name = "LDO2", },
	{ .name = "LDO3", },
	{ .name = "LDO4", },
	{ .name = "LDO5", },
	{ .name = "LDO6", },
};

static int da9055_regulator_dt_init(struct platform_device *pdev,
				    struct da9055_regulator *regulator,
				    struct regulator_config *config,
				    int regid)
{
	struct device_node *nproot, *np;
	int ret;

	nproot = of_node_get(pdev->dev.parent->of_node);
	if (!nproot)
		return -ENODEV;

	np = of_get_child_by_name(nproot, "regulators");
	if (!np)
		return -ENODEV;

	ret = of_regulator_match(&pdev->dev, np, &da9055_reg_matches[regid], 1);
	of_node_put(nproot);
	if (ret < 0) {
		dev_err(&pdev->dev, "Error matching regulator: %d\n", ret);
		return ret;
	}

	config->init_data = da9055_reg_matches[regid].init_data;
	config->of_node = da9055_reg_matches[regid].of_node;

	if (!config->of_node)
		return -ENODEV;

	return 0;
}
#else
static inline int da9055_regulator_dt_init(struct platform_device *pdev,
				       struct da9055_regulator *regulator,
				       struct regulator_config *config,
				       int regid)
{
	return -ENODEV;
}
#endif /* CONFIG_OF */

static int da9055_regulator_probe(struct platform_device *pdev)
{
	struct regulator_config config = { };
	struct da9055_regulator *regulator;
	struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
	struct da9055_pdata *pdata = dev_get_platdata(da9055->dev);
	int ret, irq;

	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator),
				 GFP_KERNEL);
	if (!regulator)
		return -ENOMEM;

	regulator->info = find_regulator_info(pdev->id);
	if (regulator->info == NULL) {
		dev_err(&pdev->dev, "invalid regulator ID specified\n");
		return -EINVAL;
	}

	regulator->da9055 = da9055;
	config.dev = &pdev->dev;
	config.driver_data = regulator;
	config.regmap = da9055->regmap;

	if (pdata) {
		config.init_data = pdata->regulators[pdev->id];
	} else {
		ret = da9055_regulator_dt_init(pdev, regulator, &config,
					       pdev->id);
		if (ret < 0)
			return ret;
	}

	ret = da9055_gpio_init(regulator, &config, pdata, pdev->id);
	if (ret < 0)
		return ret;

	regulator->rdev = devm_regulator_register(&pdev->dev,
						  &regulator->info->reg_desc,
						  &config);
	if (IS_ERR(regulator->rdev)) {
		dev_err(&pdev->dev, "Failed to register regulator %s\n",
			regulator->info->reg_desc.name);
		return PTR_ERR(regulator->rdev);
	}

	/* Only LDO 5 and 6 has got the over current interrupt */
	if (pdev->id == DA9055_ID_LDO5 || pdev->id ==  DA9055_ID_LDO6) {
		irq = platform_get_irq_byname(pdev, "REGULATOR");
		if (irq < 0)
			return irq;

		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
						da9055_ldo5_6_oc_irq,
						IRQF_TRIGGER_HIGH |
						IRQF_ONESHOT |
						IRQF_PROBE_SHARED,
						pdev->name, regulator);
		if (ret != 0) {
			if (ret != -EBUSY) {
				dev_err(&pdev->dev,
				"Failed to request Regulator IRQ %d: %d\n",
				irq, ret);
				return ret;
			}
		}
	}

	platform_set_drvdata(pdev, regulator);

	return 0;
}

static struct platform_driver da9055_regulator_driver = {
	.probe = da9055_regulator_probe,
	.driver = {
		.name = "da9055-regulator",
	},
};

static int __init da9055_regulator_init(void)
{
	return platform_driver_register(&da9055_regulator_driver);
}
subsys_initcall(da9055_regulator_init);

static void __exit da9055_regulator_exit(void)
{
	platform_driver_unregister(&da9055_regulator_driver);
}
module_exit(da9055_regulator_exit);

MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9055-regulator");
Commit	Line	Data
f6130be6 AJ	1	/*
	2	* Regulator driver for DA9055 PMIC
	3	*
	4	* Copyright(c) 2012 Dialog Semiconductor Ltd.
	5	*
	6	* Author: David Dajun Chen <dchen@diasemi.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/init.h>
	17	#include <linux/err.h>
	18	#include <linux/gpio.h>
8d05560d	19	#include <linux/gpio/consumer.h>
f6130be6 AJ	20	#include <linux/platform_device.h>
	21	#include <linux/regulator/driver.h>
	22	#include <linux/regulator/machine.h>
8b61a28d AT	23	#include <linux/of.h>
8b61a28d AT	24	#include <linux/regulator/of_regulator.h>
f6130be6 AJ	25
	26	#include <linux/mfd/da9055/core.h>
	27	#include <linux/mfd/da9055/reg.h>
	28	#include <linux/mfd/da9055/pdata.h>
	29
	30	#define DA9055_MIN_UA 0
	31	#define DA9055_MAX_UA 3
	32
	33	#define DA9055_LDO_MODE_SYNC 0
	34	#define DA9055_LDO_MODE_SLEEP 1
	35
	36	#define DA9055_BUCK_MODE_SLEEP 1
	37	#define DA9055_BUCK_MODE_SYNC 2
	38	#define DA9055_BUCK_MODE_AUTO 3
	39
	40	/* DA9055 REGULATOR IDs */
	41	#define DA9055_ID_BUCK1 0
	42	#define DA9055_ID_BUCK2 1
	43	#define DA9055_ID_LDO1 2
	44	#define DA9055_ID_LDO2 3
	45	#define DA9055_ID_LDO3 4
	46	#define DA9055_ID_LDO4 5
	47	#define DA9055_ID_LDO5 6
	48	#define DA9055_ID_LDO6 7
	49
	50	/* DA9055 BUCK current limit */
941666e2 AL	51	static const unsigned int da9055_current_limits[] = {
	52	500000, 600000, 700000, 800000
	53	};
f6130be6 AJ	54
	55	struct da9055_conf_reg {
	56	int reg;
	57	int sel_mask;
	58	int en_mask;
	59	};
	60
	61	struct da9055_volt_reg {
	62	int reg_a;
	63	int reg_b;
	64	int sl_shift;
f6130be6	65	int v_mask;
f6130be6 AJ	66	};
	67
	68	struct da9055_mode_reg {
	69	int reg;
	70	int mask;
	71	int shift;
	72	};
	73
	74	struct da9055_regulator_info {
	75	struct regulator_desc reg_desc;
	76	struct da9055_conf_reg conf;
	77	struct da9055_volt_reg volt;
	78	struct da9055_mode_reg mode;
	79	};
	80
	81	struct da9055_regulator {
	82	struct da9055 *da9055;
	83	struct da9055_regulator_info *info;
	84	struct regulator_dev *rdev;
	85	enum gpio_select reg_rselect;
	86	};
	87
	88	static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev)
	89	{
	90	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	91	struct da9055_regulator_info *info = regulator->info;
	92	int ret, mode = 0;
	93
	94	ret = da9055_reg_read(regulator->da9055, info->mode.reg);
	95	if (ret < 0)
	96	return ret;
	97
	98	switch ((ret & info->mode.mask) >> info->mode.shift) {
	99	case DA9055_BUCK_MODE_SYNC:
	100	mode = REGULATOR_MODE_FAST;
	101	break;
	102	case DA9055_BUCK_MODE_AUTO:
	103	mode = REGULATOR_MODE_NORMAL;
	104	break;
	105	case DA9055_BUCK_MODE_SLEEP:
	106	mode = REGULATOR_MODE_STANDBY;
	107	break;
	108	}
	109
	110	return mode;
	111	}
	112
	113	static int da9055_buck_set_mode(struct regulator_dev *rdev,
	114	unsigned int mode)
	115	{
	116	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	117	struct da9055_regulator_info *info = regulator->info;
	118	int val = 0;
	119
	120	switch (mode) {
	121	case REGULATOR_MODE_FAST:
	122	val = DA9055_BUCK_MODE_SYNC << info->mode.shift;
	123	break;
	124	case REGULATOR_MODE_NORMAL:
	125	val = DA9055_BUCK_MODE_AUTO << info->mode.shift;
	126	break;
	127	case REGULATOR_MODE_STANDBY:
	128	val = DA9055_BUCK_MODE_SLEEP << info->mode.shift;
	129	break;
130	}
131
132	return da9055_reg_update(regulator->da9055, info->mode.reg,
133	info->mode.mask, val);
134	}
135
136	static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev)
137	{
138	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
139	struct da9055_regulator_info *info = regulator->info;
140	int ret;
141
142	ret = da9055_reg_read(regulator->da9055, info->volt.reg_b);
143	if (ret < 0)
144	return ret;
145
146	if (ret >> info->volt.sl_shift)
147	return REGULATOR_MODE_STANDBY;
148	else
149	return REGULATOR_MODE_NORMAL;
150	}
151
152	static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
153	{
154	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
155	struct da9055_regulator_info *info = regulator->info;
156	struct da9055_volt_reg volt = info->volt;
157	int val = 0;
158
159	switch (mode) {
160	case REGULATOR_MODE_NORMAL:
161	case REGULATOR_MODE_FAST:
162	val = DA9055_LDO_MODE_SYNC;
163	break;
164	case REGULATOR_MODE_STANDBY:
165	val = DA9055_LDO_MODE_SLEEP;
166	break;
167	}
168
169	return da9055_reg_update(regulator->da9055, volt.reg_b,
170	1 << volt.sl_shift,
171	val << volt.sl_shift);
172	}
173
f6130be6 AJ	174	static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev)
	175	{
	176	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	177	struct da9055_regulator_info *info = regulator->info;
	178	struct da9055_volt_reg volt = info->volt;
	179	int ret, sel;
	180
	181	/*
	182	* There are two voltage register set A & B for voltage ramping but
	183	* either one of then can be active therefore we first determine
	184	* the active register set.
	185	*/
	186	ret = da9055_reg_read(regulator->da9055, info->conf.reg);
	187	if (ret < 0)
	188	return ret;
	189
	190	ret &= info->conf.sel_mask;
	191
	192	/* Get the voltage for the active register set A/B */
	193	if (ret == DA9055_REGUALTOR_SET_A)
	194	ret = da9055_reg_read(regulator->da9055, volt.reg_a);
	195	else
	196	ret = da9055_reg_read(regulator->da9055, volt.reg_b);
	197
	198	if (ret < 0)
	199	return ret;
	200
	201	sel = (ret & volt.v_mask);
6b1f8a45	202	return sel;
f6130be6 AJ	203	}
f6130be6 AJ	204
f6130be6 AJ	205	static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev,
	206	unsigned int selector)
	207	{
	208	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	209	struct da9055_regulator_info *info = regulator->info;
	210	int ret;
	211
	212	/*
	213	* Regulator register set A/B is not selected through GPIO therefore
	214	* we use default register set A for voltage ramping.
	215	*/
	216	if (regulator->reg_rselect == NO_GPIO) {
	217	/* Select register set A */
	218	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	219	info->conf.sel_mask, DA9055_SEL_REG_A);
	220	if (ret < 0)
	221	return ret;
	222
	223	/* Set the voltage */
369cf602 AL	224	return da9055_reg_update(regulator->da9055, info->volt.reg_a,
369cf602 AL	225	info->volt.v_mask, selector);
f6130be6 AJ	226	}
	227
	228	/*
	229	* Here regulator register set A/B is selected through GPIO.
	230	* Therefore we first determine the selected register set A/B and
	231	* then set the desired voltage for that register set A/B.
	232	*/
	233	ret = da9055_reg_read(regulator->da9055, info->conf.reg);
	234	if (ret < 0)
	235	return ret;
	236
	237	ret &= info->conf.sel_mask;
	238
	239	/* Set the voltage */
	240	if (ret == DA9055_REGUALTOR_SET_A)
369cf602 AL	241	return da9055_reg_update(regulator->da9055, info->volt.reg_a,
369cf602 AL	242	info->volt.v_mask, selector);
f6130be6	243	else
369cf602 AL	244	return da9055_reg_update(regulator->da9055, info->volt.reg_b,
369cf602 AL	245	info->volt.v_mask, selector);
f6130be6 AJ	246	}
	247
	248	static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev,
	249	int uV)
	250	{
	251	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	252	struct da9055_regulator_info *info = regulator->info;
	253	int ret;
	254
	255	/* Select register set B for suspend voltage ramping. */
	256	if (regulator->reg_rselect == NO_GPIO) {
	257	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	258	info->conf.sel_mask, DA9055_SEL_REG_B);
	259	if (ret < 0)
	260	return ret;
	261	}
	262
6b1f8a45	263	ret = regulator_map_voltage_linear(rdev, uV, uV);
f6130be6 AJ	264	if (ret < 0)
	265	return ret;
	266
369cf602 AL	267	return da9055_reg_update(regulator->da9055, info->volt.reg_b,
369cf602 AL	268	info->volt.v_mask, ret);
f6130be6 AJ	269	}
	270
	271	static int da9055_suspend_enable(struct regulator_dev *rdev)
	272	{
	273	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	274	struct da9055_regulator_info *info = regulator->info;
	275
	276	/* Select register set B for voltage ramping. */
	277	if (regulator->reg_rselect == NO_GPIO)
	278	return da9055_reg_update(regulator->da9055, info->conf.reg,
	279	info->conf.sel_mask, DA9055_SEL_REG_B);
	280	else
	281	return 0;
	282	}
	283
	284	static int da9055_suspend_disable(struct regulator_dev *rdev)
	285	{
	286	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	287	struct da9055_regulator_info *info = regulator->info;
	288
	289	/* Diselect register set B. */
	290	if (regulator->reg_rselect == NO_GPIO)
	291	return da9055_reg_update(regulator->da9055, info->conf.reg,
	292	info->conf.sel_mask, DA9055_SEL_REG_A);
	293	else
	294	return 0;
	295	}
	296
71242b49	297	static const struct regulator_ops da9055_buck_ops = {
f6130be6 AJ	298	.get_mode = da9055_buck_get_mode,
	299	.set_mode = da9055_buck_set_mode,
	300
941666e2 AL	301	.get_current_limit = regulator_get_current_limit_regmap,
941666e2 AL	302	.set_current_limit = regulator_set_current_limit_regmap,
f6130be6 AJ	303
	304	.get_voltage_sel = da9055_regulator_get_voltage_sel,
	305	.set_voltage_sel = da9055_regulator_set_voltage_sel,
6b1f8a45 AL	306	.list_voltage = regulator_list_voltage_linear,
6b1f8a45 AL	307	.map_voltage = regulator_map_voltage_linear,
f6130be6 AJ	308	.is_enabled = regulator_is_enabled_regmap,
	309	.enable = regulator_enable_regmap,
	310	.disable = regulator_disable_regmap,
	311
	312	.set_suspend_voltage = da9055_regulator_set_suspend_voltage,
	313	.set_suspend_enable = da9055_suspend_enable,
	314	.set_suspend_disable = da9055_suspend_disable,
	315	.set_suspend_mode = da9055_buck_set_mode,
	316	};
	317
71242b49	318	static const struct regulator_ops da9055_ldo_ops = {
f6130be6 AJ	319	.get_mode = da9055_ldo_get_mode,
	320	.set_mode = da9055_ldo_set_mode,
	321
	322	.get_voltage_sel = da9055_regulator_get_voltage_sel,
	323	.set_voltage_sel = da9055_regulator_set_voltage_sel,
6b1f8a45 AL	324	.list_voltage = regulator_list_voltage_linear,
6b1f8a45 AL	325	.map_voltage = regulator_map_voltage_linear,
f6130be6 AJ	326	.is_enabled = regulator_is_enabled_regmap,
	327	.enable = regulator_enable_regmap,
	328	.disable = regulator_disable_regmap,
	329
	330	.set_suspend_voltage = da9055_regulator_set_suspend_voltage,
	331	.set_suspend_enable = da9055_suspend_enable,
	332	.set_suspend_disable = da9055_suspend_disable,
	333	.set_suspend_mode = da9055_ldo_set_mode,
	334
	335	};
	336
	337	#define DA9055_LDO(_id, step, min, max, vbits, voffset) \
	338	{\
	339	.reg_desc = {\
	340	.name = #_id,\
	341	.ops = &da9055_ldo_ops,\
	342	.type = REGULATOR_VOLTAGE,\
	343	.id = DA9055_ID_##_id,\
369cf602	344	.n_voltages = (max - min) / step + 1 + (voffset), \
f6130be6 AJ	345	.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	346	.enable_mask = 1, \
	347	.min_uV = (min) * 1000,\
	348	.uV_step = (step) * 1000,\
6b1f8a45	349	.linear_min_sel = (voffset),\
f6130be6 AJ	350	.owner = THIS_MODULE,\
	351	},\
	352	.conf = {\
	353	.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	354	.sel_mask = (1 << 4),\
	355	.en_mask = 1,\
	356	},\
	357	.volt = {\
	358	.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
	359	.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
	360	.sl_shift = 7,\
f6130be6	361	.v_mask = (1 << (vbits)) - 1,\
f6130be6 AJ	362	},\
	363	}
	364
	365	#define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \
	366	{\
	367	.reg_desc = {\
	368	.name = #_id,\
	369	.ops = &da9055_buck_ops,\
	370	.type = REGULATOR_VOLTAGE,\
	371	.id = DA9055_ID_##_id,\
369cf602	372	.n_voltages = (max - min) / step + 1 + (voffset), \
f6130be6 AJ	373	.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	374	.enable_mask = 1,\
	375	.min_uV = (min) * 1000,\
	376	.uV_step = (step) * 1000,\
6b1f8a45	377	.linear_min_sel = (voffset),\
f6130be6	378	.owner = THIS_MODULE,\
941666e2 AL	379	.curr_table = da9055_current_limits,\
	380	.n_current_limits = ARRAY_SIZE(da9055_current_limits),\
	381	.csel_reg = DA9055_REG_BUCK_LIM,\
	382	.csel_mask = (mbits),\
f6130be6 AJ	383	},\
	384	.conf = {\
	385	.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	386	.sel_mask = (1 << 4),\
	387	.en_mask = 1,\
	388	},\
	389	.volt = {\
	390	.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
	391	.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
	392	.sl_shift = 7,\
f6130be6	393	.v_mask = (1 << (vbits)) - 1,\
f6130be6 AJ	394	},\
	395	.mode = {\
	396	.reg = DA9055_REG_BCORE_MODE,\
	397	.mask = (mbits),\
	398	.shift = (sbits),\
	399	},\
	400	}
	401
	402	static struct da9055_regulator_info da9055_regulator_info[] = {
	403	DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2),
	404	DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0),
	405	DA9055_LDO(LDO1, 50, 900, 3300, 6, 2),
	406	DA9055_LDO(LDO2, 50, 900, 3300, 6, 3),
	407	DA9055_LDO(LDO3, 50, 900, 3300, 6, 2),
	408	DA9055_LDO(LDO4, 50, 900, 3300, 6, 2),
	409	DA9055_LDO(LDO5, 50, 900, 2750, 6, 2),
	410	DA9055_LDO(LDO6, 20, 900, 3300, 7, 0),
	411	};
	412
	413	/*
	414	* Configures regulator to be controlled either through GPIO 1 or 2.
	415	* GPIO can control regulator state and/or select the regulator register
	416	* set A/B for voltage ramping.
	417	*/
3d68dfe3 GKH	418	static int da9055_gpio_init(struct da9055_regulator *regulator,
	419	struct regulator_config *config,
	420	struct da9055_pdata *pdata, int id)
f6130be6 AJ	421	{
	422	struct da9055_regulator_info *info = regulator->info;
	423	int ret = 0;
	424
8b61a28d AT	425	if (!pdata)
	426	return 0;
	427
f6130be6 AJ	428	if (pdata->gpio_ren && pdata->gpio_ren[id]) {
	429	char name[18];
	430	int gpio_mux = pdata->gpio_ren[id];
	431
8d05560d	432	config->ena_gpiod = pdata->ena_gpiods[id];
f6130be6 AJ	433
	434	/*
	435	* GPI pin is muxed with regulator to control the
	436	* regulator state.
	437	*/
	438	sprintf(name, "DA9055 GPI %d", gpio_mux);
	439	ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
	440	name);
	441	if (ret < 0)
	442	goto err;
	443
	444	/*
	445	* Let the regulator know that its state is controlled
	446	* through GPI.
	447	*/
	448	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	449	DA9055_E_GPI_MASK,
	450	pdata->reg_ren[id]
	451	<< DA9055_E_GPI_SHIFT);
	452	if (ret < 0)
	453	goto err;
	454	}
	455
26cbd307	456	if (pdata->gpio_rsel && pdata->gpio_rsel[id]) {
f6130be6 AJ	457	char name[18];
	458	int gpio_mux = pdata->gpio_rsel[id];
	459
	460	regulator->reg_rselect = pdata->reg_rsel[id];
	461
	462	/*
	463	* GPI pin is muxed with regulator to select the
	464	* regulator register set A/B for voltage ramping.
	465	*/
	466	sprintf(name, "DA9055 GPI %d", gpio_mux);
	467	ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
	468	name);
	469	if (ret < 0)
	470	goto err;
	471
	472	/*
	473	* Let the regulator know that its register set A/B
	474	* will be selected through GPI for voltage ramping.
	475	*/
	476	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	477	DA9055_V_GPI_MASK,
	478	pdata->reg_rsel[id]
	479	<< DA9055_V_GPI_SHIFT);
	480	}
	481
	482	err:
	483	return ret;
	484	}
	485
	486	static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data)
	487	{
	488	struct da9055_regulator *regulator = data;
	489
	490	regulator_notifier_call_chain(regulator->rdev,
	491	REGULATOR_EVENT_OVER_CURRENT, NULL);
	492
	493	return IRQ_HANDLED;
	494	}
	495
	496	static inline struct da9055_regulator_info *find_regulator_info(int id)
	497	{
	498	struct da9055_regulator_info *info;
	499	int i;
	500
	501	for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) {
	502	info = &da9055_regulator_info[i];
	503	if (info->reg_desc.id == id)
	504	return info;
	505	}
	506
	507	return NULL;
	508	}
	509
8b61a28d AT	510	#ifdef CONFIG_OF
	511	static struct of_regulator_match da9055_reg_matches[] = {
	512	{ .name = "BUCK1", },
	513	{ .name = "BUCK2", },
	514	{ .name = "LDO1", },
	515	{ .name = "LDO2", },
	516	{ .name = "LDO3", },
	517	{ .name = "LDO4", },
	518	{ .name = "LDO5", },
	519	{ .name = "LDO6", },
	520	};
	521
	522	static int da9055_regulator_dt_init(struct platform_device *pdev,
	523	struct da9055_regulator *regulator,
	524	struct regulator_config *config,
	525	int regid)
	526	{
	527	struct device_node nproot, np;
	528	int ret;
	529
	530	nproot = of_node_get(pdev->dev.parent->of_node);
	531	if (!nproot)
	532	return -ENODEV;
	533
a4b4e66a	534	np = of_get_child_by_name(nproot, "regulators");
8b61a28d AT	535	if (!np)
	536	return -ENODEV;
	537
	538	ret = of_regulator_match(&pdev->dev, np, &da9055_reg_matches[regid], 1);
	539	of_node_put(nproot);
	540	if (ret < 0) {
	541	dev_err(&pdev->dev, "Error matching regulator: %d\n", ret);
fe2eb722	542	return ret;
8b61a28d AT	543	}
	544
	545	config->init_data = da9055_reg_matches[regid].init_data;
	546	config->of_node = da9055_reg_matches[regid].of_node;
	547
	548	if (!config->of_node)
	549	return -ENODEV;
	550
	551	return 0;
	552	}
	553	#else
dae6cdb4	554	static inline int da9055_regulator_dt_init(struct platform_device *pdev,
8b61a28d AT	555	struct da9055_regulator *regulator,
	556	struct regulator_config *config,
	557	int regid)
	558	{
	559	return -ENODEV;
	560	}
	561	#endif /* CONFIG_OF */
	562
3d68dfe3	563	static int da9055_regulator_probe(struct platform_device *pdev)
f6130be6 AJ	564	{
	565	struct regulator_config config = { };
	566	struct da9055_regulator *regulator;
	567	struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
dff91d0b	568	struct da9055_pdata *pdata = dev_get_platdata(da9055->dev);
f6130be6 AJ	569	int ret, irq;
f6130be6 AJ	570
f6130be6 AJ	571	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator),
	572	GFP_KERNEL);
	573	if (!regulator)
	574	return -ENOMEM;
	575
	576	regulator->info = find_regulator_info(pdev->id);
	577	if (regulator->info == NULL) {
	578	dev_err(&pdev->dev, "invalid regulator ID specified\n");
	579	return -EINVAL;
	580	}
	581
	582	regulator->da9055 = da9055;
	583	config.dev = &pdev->dev;
	584	config.driver_data = regulator;
	585	config.regmap = da9055->regmap;
	586
5a7d7d0f	587	if (pdata) {
f6130be6	588	config.init_data = pdata->regulators[pdev->id];
8b61a28d AT	589	} else {
	590	ret = da9055_regulator_dt_init(pdev, regulator, &config,
	591	pdev->id);
	592	if (ret < 0)
	593	return ret;
	594	}
f6130be6 AJ	595
	596	ret = da9055_gpio_init(regulator, &config, pdata, pdev->id);
	597	if (ret < 0)
	598	return ret;
	599
0d328806 AL	600	regulator->rdev = devm_regulator_register(&pdev->dev,
	601	&regulator->info->reg_desc,
	602	&config);
f6130be6 AJ	603	if (IS_ERR(regulator->rdev)) {
	604	dev_err(&pdev->dev, "Failed to register regulator %s\n",
	605	regulator->info->reg_desc.name);
0d328806	606	return PTR_ERR(regulator->rdev);
f6130be6 AJ	607	}
	608
	609	/* Only LDO 5 and 6 has got the over current interrupt */
	610	if (pdev->id == DA9055_ID_LDO5 \|\| pdev->id == DA9055_ID_LDO6) {
	611	irq = platform_get_irq_byname(pdev, "REGULATOR");
f17083c3 AT	612	if (irq < 0)
	613	return irq;
	614
f6130be6 AJ	615	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
	616	da9055_ldo5_6_oc_irq,
	617	IRQF_TRIGGER_HIGH \|
	618	IRQF_ONESHOT \|
	619	IRQF_PROBE_SHARED,
	620	pdev->name, regulator);
	621	if (ret != 0) {
	622	if (ret != -EBUSY) {
	623	dev_err(&pdev->dev,
	624	"Failed to request Regulator IRQ %d: %d\n",
	625	irq, ret);
0d328806	626	return ret;
f6130be6 AJ	627	}
	628	}
	629	}
	630
	631	platform_set_drvdata(pdev, regulator);
	632
f6130be6 AJ	633	return 0;
	634	}
	635
	636	static struct platform_driver da9055_regulator_driver = {
	637	.probe = da9055_regulator_probe,
f6130be6 AJ	638	.driver = {
f6130be6 AJ	639	.name = "da9055-regulator",
f6130be6 AJ	640	},
	641	};
	642
	643	static int __init da9055_regulator_init(void)
	644	{
	645	return platform_driver_register(&da9055_regulator_driver);
	646	}
	647	subsys_initcall(da9055_regulator_init);
	648
	649	static void __exit da9055_regulator_exit(void)
	650	{
	651	platform_driver_unregister(&da9055_regulator_driver);
	652	}
	653	module_exit(da9055_regulator_exit);
	654
	655	MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
	656	MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC");
	657	MODULE_LICENSE("GPL");
	658	MODULE_ALIAS("platform:da9055-regulator");