[mirror_ubuntu-bionic-kernel.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/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.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 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;
	int v_shift;
};

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_buck_get_current_limit(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, DA9055_REG_BUCK_LIM);
	if (ret < 0)
		return ret;

	ret &= info->mode.mask;
	return da9055_current_limits[ret >> info->mode.shift];
}

static int da9055_buck_set_current_limit(struct regulator_dev *rdev, int min_uA,
					 int max_uA)
{
	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	struct da9055_regulator_info *info = regulator->info;
	int i;

	for (i = ARRAY_SIZE(da9055_current_limits) - 1; i >= 0; i--) {
		if ((min_uA <= da9055_current_limits[i]) &&
		    (da9055_current_limits[i] <= max_uA))
			return da9055_reg_update(regulator->da9055,
						 DA9055_REG_BUCK_LIM,
						 info->mode.mask,
						 i << info->mode.shift);
	}

	return -EINVAL;
}

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

	.get_current_limit = da9055_buck_get_current_limit,
	.set_current_limit = da9055_buck_set_current_limit,

	.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 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,\
		.v_shift = (vbits),\
	},\
}

#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,\
	},\
	.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,\
		.v_shift = (vbits),\
	},\
	.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->gpio_ren && pdata->gpio_ren[id]) {
		char name[18];
		int gpio_mux = pdata->gpio_ren[id];

		config->ena_gpio = pdata->ena_gpio[id];
		config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
		config->ena_gpio_invert = 1;

		/*
		 * 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;
}

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 = da9055->dev->platform_data;
	int ret, irq;

	if (pdata == NULL || pdata->regulators[pdev->id] == NULL)
		return -ENODEV;

	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 && pdata->regulators)
		config.init_data = pdata->regulators[pdev->id];

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

	regulator->rdev = regulator_register(&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);
		ret = PTR_ERR(regulator->rdev);
		return ret;
	}

	/* 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");
		irq = regmap_irq_get_virq(da9055->irq_data, 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);
				goto err_regulator;
			}
		}
	}

	platform_set_drvdata(pdev, regulator);

	return 0;

err_regulator:
	regulator_unregister(regulator->rdev);
	return ret;
}

static int da9055_regulator_remove(struct platform_device *pdev)
{
	struct da9055_regulator *regulator = platform_get_drvdata(pdev);

	regulator_unregister(regulator->rdev);

	return 0;
}

static struct platform_driver da9055_regulator_driver = {
	.probe = da9055_regulator_probe,
	.remove = da9055_regulator_remove,
	.driver = {
		.name = "da9055-regulator",
		.owner = THIS_MODULE,
	},
};

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>
	19	#include <linux/platform_device.h>
	20	#include <linux/regulator/driver.h>
	21	#include <linux/regulator/machine.h>
	22
	23	#include <linux/mfd/da9055/core.h>
	24	#include <linux/mfd/da9055/reg.h>
	25	#include <linux/mfd/da9055/pdata.h>
	26
	27	#define DA9055_MIN_UA 0
	28	#define DA9055_MAX_UA 3
	29
	30	#define DA9055_LDO_MODE_SYNC 0
	31	#define DA9055_LDO_MODE_SLEEP 1
	32
	33	#define DA9055_BUCK_MODE_SLEEP 1
	34	#define DA9055_BUCK_MODE_SYNC 2
	35	#define DA9055_BUCK_MODE_AUTO 3
	36
	37	/* DA9055 REGULATOR IDs */
	38	#define DA9055_ID_BUCK1 0
	39	#define DA9055_ID_BUCK2 1
	40	#define DA9055_ID_LDO1 2
	41	#define DA9055_ID_LDO2 3
	42	#define DA9055_ID_LDO3 4
	43	#define DA9055_ID_LDO4 5
	44	#define DA9055_ID_LDO5 6
	45	#define DA9055_ID_LDO6 7
	46
	47	/* DA9055 BUCK current limit */
	48	static const int da9055_current_limits[] = { 500000, 600000, 700000, 800000 };
	49
	50	struct da9055_conf_reg {
	51	int reg;
	52	int sel_mask;
	53	int en_mask;
	54	};
	55
	56	struct da9055_volt_reg {
	57	int reg_a;
	58	int reg_b;
	59	int sl_shift;
f6130be6 AJ	60	int v_mask;
	61	int v_shift;
	62	};
	63
	64	struct da9055_mode_reg {
	65	int reg;
	66	int mask;
	67	int shift;
	68	};
	69
	70	struct da9055_regulator_info {
	71	struct regulator_desc reg_desc;
	72	struct da9055_conf_reg conf;
	73	struct da9055_volt_reg volt;
	74	struct da9055_mode_reg mode;
	75	};
	76
	77	struct da9055_regulator {
	78	struct da9055 *da9055;
	79	struct da9055_regulator_info *info;
	80	struct regulator_dev *rdev;
	81	enum gpio_select reg_rselect;
	82	};
	83
	84	static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev)
	85	{
	86	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	87	struct da9055_regulator_info *info = regulator->info;
	88	int ret, mode = 0;
	89
	90	ret = da9055_reg_read(regulator->da9055, info->mode.reg);
	91	if (ret < 0)
	92	return ret;
	93
	94	switch ((ret & info->mode.mask) >> info->mode.shift) {
	95	case DA9055_BUCK_MODE_SYNC:
	96	mode = REGULATOR_MODE_FAST;
	97	break;
	98	case DA9055_BUCK_MODE_AUTO:
	99	mode = REGULATOR_MODE_NORMAL;
	100	break;
	101	case DA9055_BUCK_MODE_SLEEP:
	102	mode = REGULATOR_MODE_STANDBY;
	103	break;
	104	}
	105
	106	return mode;
	107	}
	108
	109	static int da9055_buck_set_mode(struct regulator_dev *rdev,
	110	unsigned int mode)
	111	{
	112	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	113	struct da9055_regulator_info *info = regulator->info;
	114	int val = 0;
	115
	116	switch (mode) {
	117	case REGULATOR_MODE_FAST:
	118	val = DA9055_BUCK_MODE_SYNC << info->mode.shift;
	119	break;
	120	case REGULATOR_MODE_NORMAL:
	121	val = DA9055_BUCK_MODE_AUTO << info->mode.shift;
	122	break;
	123	case REGULATOR_MODE_STANDBY:
124	val = DA9055_BUCK_MODE_SLEEP << info->mode.shift;
125	break;
126	}
127
128	return da9055_reg_update(regulator->da9055, info->mode.reg,
129	info->mode.mask, val);
130	}
131
132	static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev)
133	{
134	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
135	struct da9055_regulator_info *info = regulator->info;
136	int ret;
137
138	ret = da9055_reg_read(regulator->da9055, info->volt.reg_b);
139	if (ret < 0)
140	return ret;
141
142	if (ret >> info->volt.sl_shift)
143	return REGULATOR_MODE_STANDBY;
144	else
145	return REGULATOR_MODE_NORMAL;
146	}
147
148	static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
149	{
150	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
151	struct da9055_regulator_info *info = regulator->info;
152	struct da9055_volt_reg volt = info->volt;
153	int val = 0;
154
155	switch (mode) {
156	case REGULATOR_MODE_NORMAL:
157	case REGULATOR_MODE_FAST:
158	val = DA9055_LDO_MODE_SYNC;
159	break;
160	case REGULATOR_MODE_STANDBY:
161	val = DA9055_LDO_MODE_SLEEP;
162	break;
163	}
164
165	return da9055_reg_update(regulator->da9055, volt.reg_b,
166	1 << volt.sl_shift,
167	val << volt.sl_shift);
168	}
169
170	static int da9055_buck_get_current_limit(struct regulator_dev *rdev)
171	{
172	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
173	struct da9055_regulator_info *info = regulator->info;
174	int ret;
175
176	ret = da9055_reg_read(regulator->da9055, DA9055_REG_BUCK_LIM);
177	if (ret < 0)
178	return ret;
179
180	ret &= info->mode.mask;
181	return da9055_current_limits[ret >> info->mode.shift];
182	}
183
184	static int da9055_buck_set_current_limit(struct regulator_dev *rdev, int min_uA,
185	int max_uA)
186	{
187	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
188	struct da9055_regulator_info *info = regulator->info;
f509fd46 AL	189	int i;
	190
	191	for (i = ARRAY_SIZE(da9055_current_limits) - 1; i >= 0; i--) {
	192	if ((min_uA <= da9055_current_limits[i]) &&
	193	(da9055_current_limits[i] <= max_uA))
	194	return da9055_reg_update(regulator->da9055,
	195	DA9055_REG_BUCK_LIM,
	196	info->mode.mask,
	197	i << info->mode.shift);
f6130be6 AJ	198	}
f6130be6 AJ	199
f509fd46	200	return -EINVAL;
f6130be6 AJ	201	}
	202
	203	static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev)
	204	{
	205	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	206	struct da9055_regulator_info *info = regulator->info;
	207	struct da9055_volt_reg volt = info->volt;
	208	int ret, sel;
	209
	210	/*
	211	* There are two voltage register set A & B for voltage ramping but
	212	* either one of then can be active therefore we first determine
	213	* the active register set.
	214	*/
	215	ret = da9055_reg_read(regulator->da9055, info->conf.reg);
	216	if (ret < 0)
	217	return ret;
	218
	219	ret &= info->conf.sel_mask;
	220
	221	/* Get the voltage for the active register set A/B */
	222	if (ret == DA9055_REGUALTOR_SET_A)
	223	ret = da9055_reg_read(regulator->da9055, volt.reg_a);
	224	else
	225	ret = da9055_reg_read(regulator->da9055, volt.reg_b);
	226
	227	if (ret < 0)
	228	return ret;
	229
	230	sel = (ret & volt.v_mask);
6b1f8a45	231	return sel;
f6130be6 AJ	232	}
f6130be6 AJ	233
f6130be6 AJ	234	static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev,
	235	unsigned int selector)
	236	{
	237	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	238	struct da9055_regulator_info *info = regulator->info;
	239	int ret;
	240
	241	/*
	242	* Regulator register set A/B is not selected through GPIO therefore
	243	* we use default register set A for voltage ramping.
	244	*/
	245	if (regulator->reg_rselect == NO_GPIO) {
	246	/* Select register set A */
	247	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	248	info->conf.sel_mask, DA9055_SEL_REG_A);
	249	if (ret < 0)
	250	return ret;
	251
	252	/* Set the voltage */
369cf602 AL	253	return da9055_reg_update(regulator->da9055, info->volt.reg_a,
369cf602 AL	254	info->volt.v_mask, selector);
f6130be6 AJ	255	}
	256
	257	/*
	258	* Here regulator register set A/B is selected through GPIO.
	259	* Therefore we first determine the selected register set A/B and
	260	* then set the desired voltage for that register set A/B.
	261	*/
	262	ret = da9055_reg_read(regulator->da9055, info->conf.reg);
	263	if (ret < 0)
	264	return ret;
	265
	266	ret &= info->conf.sel_mask;
	267
	268	/* Set the voltage */
	269	if (ret == DA9055_REGUALTOR_SET_A)
369cf602 AL	270	return da9055_reg_update(regulator->da9055, info->volt.reg_a,
369cf602 AL	271	info->volt.v_mask, selector);
f6130be6	272	else
369cf602 AL	273	return da9055_reg_update(regulator->da9055, info->volt.reg_b,
369cf602 AL	274	info->volt.v_mask, selector);
f6130be6 AJ	275	}
	276
	277	static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev,
	278	int uV)
	279	{
	280	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	281	struct da9055_regulator_info *info = regulator->info;
	282	int ret;
	283
	284	/* Select register set B for suspend voltage ramping. */
	285	if (regulator->reg_rselect == NO_GPIO) {
	286	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	287	info->conf.sel_mask, DA9055_SEL_REG_B);
	288	if (ret < 0)
	289	return ret;
	290	}
	291
6b1f8a45	292	ret = regulator_map_voltage_linear(rdev, uV, uV);
f6130be6 AJ	293	if (ret < 0)
	294	return ret;
	295
369cf602 AL	296	return da9055_reg_update(regulator->da9055, info->volt.reg_b,
369cf602 AL	297	info->volt.v_mask, ret);
f6130be6 AJ	298	}
	299
	300	static int da9055_suspend_enable(struct regulator_dev *rdev)
	301	{
	302	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	303	struct da9055_regulator_info *info = regulator->info;
	304
	305	/* Select register set B for voltage ramping. */
	306	if (regulator->reg_rselect == NO_GPIO)
	307	return da9055_reg_update(regulator->da9055, info->conf.reg,
	308	info->conf.sel_mask, DA9055_SEL_REG_B);
	309	else
	310	return 0;
	311	}
	312
	313	static int da9055_suspend_disable(struct regulator_dev *rdev)
	314	{
	315	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	316	struct da9055_regulator_info *info = regulator->info;
	317
	318	/* Diselect register set B. */
	319	if (regulator->reg_rselect == NO_GPIO)
	320	return da9055_reg_update(regulator->da9055, info->conf.reg,
	321	info->conf.sel_mask, DA9055_SEL_REG_A);
	322	else
	323	return 0;
	324	}
	325
	326	static struct regulator_ops da9055_buck_ops = {
	327	.get_mode = da9055_buck_get_mode,
	328	.set_mode = da9055_buck_set_mode,
	329
	330	.get_current_limit = da9055_buck_get_current_limit,
	331	.set_current_limit = da9055_buck_set_current_limit,
	332
	333	.get_voltage_sel = da9055_regulator_get_voltage_sel,
	334	.set_voltage_sel = da9055_regulator_set_voltage_sel,
6b1f8a45 AL	335	.list_voltage = regulator_list_voltage_linear,
6b1f8a45 AL	336	.map_voltage = regulator_map_voltage_linear,
f6130be6 AJ	337	.is_enabled = regulator_is_enabled_regmap,
	338	.enable = regulator_enable_regmap,
	339	.disable = regulator_disable_regmap,
	340
	341	.set_suspend_voltage = da9055_regulator_set_suspend_voltage,
	342	.set_suspend_enable = da9055_suspend_enable,
	343	.set_suspend_disable = da9055_suspend_disable,
	344	.set_suspend_mode = da9055_buck_set_mode,
	345	};
	346
	347	static struct regulator_ops da9055_ldo_ops = {
	348	.get_mode = da9055_ldo_get_mode,
	349	.set_mode = da9055_ldo_set_mode,
	350
	351	.get_voltage_sel = da9055_regulator_get_voltage_sel,
	352	.set_voltage_sel = da9055_regulator_set_voltage_sel,
6b1f8a45 AL	353	.list_voltage = regulator_list_voltage_linear,
6b1f8a45 AL	354	.map_voltage = regulator_map_voltage_linear,
f6130be6 AJ	355	.is_enabled = regulator_is_enabled_regmap,
	356	.enable = regulator_enable_regmap,
	357	.disable = regulator_disable_regmap,
	358
	359	.set_suspend_voltage = da9055_regulator_set_suspend_voltage,
	360	.set_suspend_enable = da9055_suspend_enable,
	361	.set_suspend_disable = da9055_suspend_disable,
	362	.set_suspend_mode = da9055_ldo_set_mode,
	363
	364	};
	365
	366	#define DA9055_LDO(_id, step, min, max, vbits, voffset) \
	367	{\
	368	.reg_desc = {\
	369	.name = #_id,\
	370	.ops = &da9055_ldo_ops,\
	371	.type = REGULATOR_VOLTAGE,\
	372	.id = DA9055_ID_##_id,\
369cf602	373	.n_voltages = (max - min) / step + 1 + (voffset), \
f6130be6 AJ	374	.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	375	.enable_mask = 1, \
	376	.min_uV = (min) * 1000,\
	377	.uV_step = (step) * 1000,\
6b1f8a45	378	.linear_min_sel = (voffset),\
f6130be6 AJ	379	.owner = THIS_MODULE,\
	380	},\
	381	.conf = {\
	382	.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	383	.sel_mask = (1 << 4),\
	384	.en_mask = 1,\
	385	},\
	386	.volt = {\
	387	.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
	388	.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
	389	.sl_shift = 7,\
f6130be6 AJ	390	.v_mask = (1 << (vbits)) - 1,\
	391	.v_shift = (vbits),\
	392	},\
	393	}
	394
	395	#define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \
	396	{\
	397	.reg_desc = {\
	398	.name = #_id,\
	399	.ops = &da9055_buck_ops,\
	400	.type = REGULATOR_VOLTAGE,\
	401	.id = DA9055_ID_##_id,\
369cf602	402	.n_voltages = (max - min) / step + 1 + (voffset), \
f6130be6 AJ	403	.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	404	.enable_mask = 1,\
	405	.min_uV = (min) * 1000,\
	406	.uV_step = (step) * 1000,\
6b1f8a45	407	.linear_min_sel = (voffset),\
f6130be6 AJ	408	.owner = THIS_MODULE,\
	409	},\
	410	.conf = {\
	411	.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	412	.sel_mask = (1 << 4),\
	413	.en_mask = 1,\
	414	},\
	415	.volt = {\
	416	.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
	417	.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
	418	.sl_shift = 7,\
f6130be6 AJ	419	.v_mask = (1 << (vbits)) - 1,\
	420	.v_shift = (vbits),\
	421	},\
	422	.mode = {\
	423	.reg = DA9055_REG_BCORE_MODE,\
	424	.mask = (mbits),\
	425	.shift = (sbits),\
	426	},\
	427	}
	428
	429	static struct da9055_regulator_info da9055_regulator_info[] = {
	430	DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2),
	431	DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0),
	432	DA9055_LDO(LDO1, 50, 900, 3300, 6, 2),
	433	DA9055_LDO(LDO2, 50, 900, 3300, 6, 3),
	434	DA9055_LDO(LDO3, 50, 900, 3300, 6, 2),
	435	DA9055_LDO(LDO4, 50, 900, 3300, 6, 2),
	436	DA9055_LDO(LDO5, 50, 900, 2750, 6, 2),
	437	DA9055_LDO(LDO6, 20, 900, 3300, 7, 0),
	438	};
	439
	440	/*
	441	* Configures regulator to be controlled either through GPIO 1 or 2.
	442	* GPIO can control regulator state and/or select the regulator register
	443	* set A/B for voltage ramping.
	444	*/
3d68dfe3 GKH	445	static int da9055_gpio_init(struct da9055_regulator *regulator,
	446	struct regulator_config *config,
	447	struct da9055_pdata *pdata, int id)
f6130be6 AJ	448	{
	449	struct da9055_regulator_info *info = regulator->info;
	450	int ret = 0;
	451
	452	if (pdata->gpio_ren && pdata->gpio_ren[id]) {
	453	char name[18];
	454	int gpio_mux = pdata->gpio_ren[id];
	455
	456	config->ena_gpio = pdata->ena_gpio[id];
	457	config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
	458	config->ena_gpio_invert = 1;
	459
	460	/*
	461	* GPI pin is muxed with regulator to control the
	462	* regulator state.
	463	*/
	464	sprintf(name, "DA9055 GPI %d", gpio_mux);
	465	ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
	466	name);
	467	if (ret < 0)
	468	goto err;
	469
	470	/*
	471	* Let the regulator know that its state is controlled
	472	* through GPI.
	473	*/
	474	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	475	DA9055_E_GPI_MASK,
	476	pdata->reg_ren[id]
	477	<< DA9055_E_GPI_SHIFT);
	478	if (ret < 0)
	479	goto err;
	480	}
	481
26cbd307	482	if (pdata->gpio_rsel && pdata->gpio_rsel[id]) {
f6130be6 AJ	483	char name[18];
	484	int gpio_mux = pdata->gpio_rsel[id];
	485
	486	regulator->reg_rselect = pdata->reg_rsel[id];
	487
	488	/*
	489	* GPI pin is muxed with regulator to select the
	490	* regulator register set A/B for voltage ramping.
	491	*/
	492	sprintf(name, "DA9055 GPI %d", gpio_mux);
	493	ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
	494	name);
	495	if (ret < 0)
	496	goto err;
	497
	498	/*
	499	* Let the regulator know that its register set A/B
	500	* will be selected through GPI for voltage ramping.
	501	*/
	502	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	503	DA9055_V_GPI_MASK,
	504	pdata->reg_rsel[id]
	505	<< DA9055_V_GPI_SHIFT);
	506	}
	507
	508	err:
	509	return ret;
	510	}
	511
	512	static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data)
	513	{
	514	struct da9055_regulator *regulator = data;
	515
	516	regulator_notifier_call_chain(regulator->rdev,
	517	REGULATOR_EVENT_OVER_CURRENT, NULL);
	518
	519	return IRQ_HANDLED;
	520	}
	521
	522	static inline struct da9055_regulator_info *find_regulator_info(int id)
	523	{
	524	struct da9055_regulator_info *info;
	525	int i;
	526
	527	for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) {
	528	info = &da9055_regulator_info[i];
	529	if (info->reg_desc.id == id)
	530	return info;
	531	}
	532
	533	return NULL;
	534	}
	535
3d68dfe3	536	static int da9055_regulator_probe(struct platform_device *pdev)
f6130be6 AJ	537	{
	538	struct regulator_config config = { };
	539	struct da9055_regulator *regulator;
	540	struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
	541	struct da9055_pdata *pdata = da9055->dev->platform_data;
	542	int ret, irq;
	543
	544	if (pdata == NULL \|\| pdata->regulators[pdev->id] == NULL)
	545	return -ENODEV;
	546
	547	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator),
	548	GFP_KERNEL);
	549	if (!regulator)
	550	return -ENOMEM;
	551
	552	regulator->info = find_regulator_info(pdev->id);
	553	if (regulator->info == NULL) {
	554	dev_err(&pdev->dev, "invalid regulator ID specified\n");
	555	return -EINVAL;
	556	}
	557
	558	regulator->da9055 = da9055;
	559	config.dev = &pdev->dev;
	560	config.driver_data = regulator;
	561	config.regmap = da9055->regmap;
	562
	563	if (pdata && pdata->regulators)
	564	config.init_data = pdata->regulators[pdev->id];
	565
	566	ret = da9055_gpio_init(regulator, &config, pdata, pdev->id);
	567	if (ret < 0)
	568	return ret;
	569
	570	regulator->rdev = regulator_register(&regulator->info->reg_desc,
	571	&config);
	572	if (IS_ERR(regulator->rdev)) {
	573	dev_err(&pdev->dev, "Failed to register regulator %s\n",
	574	regulator->info->reg_desc.name);
	575	ret = PTR_ERR(regulator->rdev);
	576	return ret;
	577	}
	578
	579	/* Only LDO 5 and 6 has got the over current interrupt */
	580	if (pdev->id == DA9055_ID_LDO5 \|\| pdev->id == DA9055_ID_LDO6) {
	581	irq = platform_get_irq_byname(pdev, "REGULATOR");
	582	irq = regmap_irq_get_virq(da9055->irq_data, irq);
	583	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
	584	da9055_ldo5_6_oc_irq,
	585	IRQF_TRIGGER_HIGH \|
	586	IRQF_ONESHOT \|
	587	IRQF_PROBE_SHARED,
	588	pdev->name, regulator);
	589	if (ret != 0) {
	590	if (ret != -EBUSY) {
	591	dev_err(&pdev->dev,
	592	"Failed to request Regulator IRQ %d: %d\n",
	593	irq, ret);
	594	goto err_regulator;
	595	}
	596	}
	597	}
	598
	599	platform_set_drvdata(pdev, regulator);
	600
601	return 0;
602
603	err_regulator:
604	regulator_unregister(regulator->rdev);
605	return ret;
606	}
607
3d68dfe3	608	static int da9055_regulator_remove(struct platform_device *pdev)
f6130be6 AJ	609	{
	610	struct da9055_regulator *regulator = platform_get_drvdata(pdev);
	611
	612	regulator_unregister(regulator->rdev);
	613
	614	return 0;
	615	}
	616
	617	static struct platform_driver da9055_regulator_driver = {
	618	.probe = da9055_regulator_probe,
3d68dfe3	619	.remove = da9055_regulator_remove,
f6130be6 AJ	620	.driver = {
	621	.name = "da9055-regulator",
	622	.owner = THIS_MODULE,
	623	},
	624	};
	625
	626	static int __init da9055_regulator_init(void)
	627	{
	628	return platform_driver_register(&da9055_regulator_driver);
	629	}
	630	subsys_initcall(da9055_regulator_init);
	631
	632	static void __exit da9055_regulator_exit(void)
	633	{
	634	platform_driver_unregister(&da9055_regulator_driver);
	635	}
	636	module_exit(da9055_regulator_exit);
	637
	638	MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
	639	MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC");
	640	MODULE_LICENSE("GPL");
	641	MODULE_ALIAS("platform:da9055-regulator");