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

// SPDX-License-Identifier: GPL-2.0+
//
// Regulator driver for DA9055 PMIC
//
// Copyright(c) 2012 Dialog Semiconductor Ltd.
//
// Author: David Dajun Chen <dchen@diasemi.com>

#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,\
		.of_match = of_match_ptr(#_id),\
		.regulators_node = of_match_ptr("regulators"),\
		.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,\
		.of_match = of_match_ptr(#_id),\
		.regulators_node = of_match_ptr("regulators"),\
		.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;
}

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

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

	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
fd2f02f9 AL	1	// SPDX-License-Identifier: GPL-2.0+
	2	//
	3	// Regulator driver for DA9055 PMIC
	4	//
	5	// Copyright(c) 2012 Dialog Semiconductor Ltd.
	6	//
	7	// Author: David Dajun Chen <dchen@diasemi.com>
f6130be6 AJ	8
	9	#include <linux/module.h>
	10	#include <linux/init.h>
	11	#include <linux/err.h>
	12	#include <linux/gpio.h>
8d05560d	13	#include <linux/gpio/consumer.h>
f6130be6 AJ	14	#include <linux/platform_device.h>
	15	#include <linux/regulator/driver.h>
	16	#include <linux/regulator/machine.h>
8b61a28d AT	17	#include <linux/of.h>
8b61a28d AT	18	#include <linux/regulator/of_regulator.h>
f6130be6 AJ	19
	20	#include <linux/mfd/da9055/core.h>
	21	#include <linux/mfd/da9055/reg.h>
	22	#include <linux/mfd/da9055/pdata.h>
	23
	24	#define DA9055_MIN_UA 0
	25	#define DA9055_MAX_UA 3
	26
	27	#define DA9055_LDO_MODE_SYNC 0
	28	#define DA9055_LDO_MODE_SLEEP 1
	29
	30	#define DA9055_BUCK_MODE_SLEEP 1
	31	#define DA9055_BUCK_MODE_SYNC 2
	32	#define DA9055_BUCK_MODE_AUTO 3
	33
	34	/* DA9055 REGULATOR IDs */
	35	#define DA9055_ID_BUCK1 0
	36	#define DA9055_ID_BUCK2 1
	37	#define DA9055_ID_LDO1 2
	38	#define DA9055_ID_LDO2 3
	39	#define DA9055_ID_LDO3 4
	40	#define DA9055_ID_LDO4 5
	41	#define DA9055_ID_LDO5 6
	42	#define DA9055_ID_LDO6 7
	43
	44	/* DA9055 BUCK current limit */
941666e2 AL	45	static const unsigned int da9055_current_limits[] = {
	46	500000, 600000, 700000, 800000
	47	};
f6130be6 AJ	48
	49	struct da9055_conf_reg {
	50	int reg;
	51	int sel_mask;
	52	int en_mask;
	53	};
	54
	55	struct da9055_volt_reg {
	56	int reg_a;
	57	int reg_b;
	58	int sl_shift;
f6130be6	59	int v_mask;
f6130be6 AJ	60	};
	61
	62	struct da9055_mode_reg {
	63	int reg;
	64	int mask;
	65	int shift;
	66	};
	67
	68	struct da9055_regulator_info {
	69	struct regulator_desc reg_desc;
	70	struct da9055_conf_reg conf;
	71	struct da9055_volt_reg volt;
	72	struct da9055_mode_reg mode;
	73	};
	74
	75	struct da9055_regulator {
	76	struct da9055 *da9055;
	77	struct da9055_regulator_info *info;
	78	struct regulator_dev *rdev;
	79	enum gpio_select reg_rselect;
	80	};
	81
	82	static unsigned int da9055_buck_get_mode(struct regulator_dev *rdev)
	83	{
	84	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	85	struct da9055_regulator_info *info = regulator->info;
	86	int ret, mode = 0;
	87
	88	ret = da9055_reg_read(regulator->da9055, info->mode.reg);
	89	if (ret < 0)
	90	return ret;
	91
	92	switch ((ret & info->mode.mask) >> info->mode.shift) {
	93	case DA9055_BUCK_MODE_SYNC:
	94	mode = REGULATOR_MODE_FAST;
	95	break;
	96	case DA9055_BUCK_MODE_AUTO:
	97	mode = REGULATOR_MODE_NORMAL;
	98	break;
	99	case DA9055_BUCK_MODE_SLEEP:
	100	mode = REGULATOR_MODE_STANDBY;
	101	break;
	102	}
	103
	104	return mode;
	105	}
	106
	107	static int da9055_buck_set_mode(struct regulator_dev *rdev,
	108	unsigned int mode)
	109	{
	110	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	111	struct da9055_regulator_info *info = regulator->info;
	112	int val = 0;
	113
	114	switch (mode) {
	115	case REGULATOR_MODE_FAST:
	116	val = DA9055_BUCK_MODE_SYNC << info->mode.shift;
	117	break;
	118	case REGULATOR_MODE_NORMAL:
	119	val = DA9055_BUCK_MODE_AUTO << info->mode.shift;
	120	break;
	121	case REGULATOR_MODE_STANDBY:
	122	val = DA9055_BUCK_MODE_SLEEP << info->mode.shift;
	123	break;
124	}
125
126	return da9055_reg_update(regulator->da9055, info->mode.reg,
127	info->mode.mask, val);
128	}
129
130	static unsigned int da9055_ldo_get_mode(struct regulator_dev *rdev)
131	{
132	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
133	struct da9055_regulator_info *info = regulator->info;
134	int ret;
135
136	ret = da9055_reg_read(regulator->da9055, info->volt.reg_b);
137	if (ret < 0)
138	return ret;
139
140	if (ret >> info->volt.sl_shift)
141	return REGULATOR_MODE_STANDBY;
142	else
143	return REGULATOR_MODE_NORMAL;
144	}
145
146	static int da9055_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
147	{
148	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
149	struct da9055_regulator_info *info = regulator->info;
150	struct da9055_volt_reg volt = info->volt;
151	int val = 0;
152
153	switch (mode) {
154	case REGULATOR_MODE_NORMAL:
155	case REGULATOR_MODE_FAST:
156	val = DA9055_LDO_MODE_SYNC;
157	break;
158	case REGULATOR_MODE_STANDBY:
159	val = DA9055_LDO_MODE_SLEEP;
160	break;
161	}
162
163	return da9055_reg_update(regulator->da9055, volt.reg_b,
164	1 << volt.sl_shift,
165	val << volt.sl_shift);
166	}
167
f6130be6 AJ	168	static int da9055_regulator_get_voltage_sel(struct regulator_dev *rdev)
	169	{
	170	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	171	struct da9055_regulator_info *info = regulator->info;
	172	struct da9055_volt_reg volt = info->volt;
	173	int ret, sel;
	174
	175	/*
	176	* There are two voltage register set A & B for voltage ramping but
	177	* either one of then can be active therefore we first determine
	178	* the active register set.
	179	*/
	180	ret = da9055_reg_read(regulator->da9055, info->conf.reg);
	181	if (ret < 0)
	182	return ret;
	183
	184	ret &= info->conf.sel_mask;
	185
	186	/* Get the voltage for the active register set A/B */
	187	if (ret == DA9055_REGUALTOR_SET_A)
	188	ret = da9055_reg_read(regulator->da9055, volt.reg_a);
	189	else
	190	ret = da9055_reg_read(regulator->da9055, volt.reg_b);
	191
	192	if (ret < 0)
	193	return ret;
	194
	195	sel = (ret & volt.v_mask);
6b1f8a45	196	return sel;
f6130be6 AJ	197	}
f6130be6 AJ	198
f6130be6 AJ	199	static int da9055_regulator_set_voltage_sel(struct regulator_dev *rdev,
	200	unsigned int selector)
	201	{
	202	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	203	struct da9055_regulator_info *info = regulator->info;
	204	int ret;
	205
	206	/*
	207	* Regulator register set A/B is not selected through GPIO therefore
	208	* we use default register set A for voltage ramping.
	209	*/
	210	if (regulator->reg_rselect == NO_GPIO) {
	211	/* Select register set A */
	212	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	213	info->conf.sel_mask, DA9055_SEL_REG_A);
	214	if (ret < 0)
	215	return ret;
	216
	217	/* Set the voltage */
369cf602 AL	218	return da9055_reg_update(regulator->da9055, info->volt.reg_a,
369cf602 AL	219	info->volt.v_mask, selector);
f6130be6 AJ	220	}
	221
	222	/*
	223	* Here regulator register set A/B is selected through GPIO.
	224	* Therefore we first determine the selected register set A/B and
	225	* then set the desired voltage for that register set A/B.
	226	*/
	227	ret = da9055_reg_read(regulator->da9055, info->conf.reg);
	228	if (ret < 0)
	229	return ret;
	230
	231	ret &= info->conf.sel_mask;
	232
	233	/* Set the voltage */
	234	if (ret == DA9055_REGUALTOR_SET_A)
369cf602 AL	235	return da9055_reg_update(regulator->da9055, info->volt.reg_a,
369cf602 AL	236	info->volt.v_mask, selector);
f6130be6	237	else
369cf602 AL	238	return da9055_reg_update(regulator->da9055, info->volt.reg_b,
369cf602 AL	239	info->volt.v_mask, selector);
f6130be6 AJ	240	}
	241
	242	static int da9055_regulator_set_suspend_voltage(struct regulator_dev *rdev,
	243	int uV)
	244	{
	245	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	246	struct da9055_regulator_info *info = regulator->info;
	247	int ret;
	248
	249	/* Select register set B for suspend voltage ramping. */
	250	if (regulator->reg_rselect == NO_GPIO) {
	251	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	252	info->conf.sel_mask, DA9055_SEL_REG_B);
	253	if (ret < 0)
	254	return ret;
	255	}
	256
6b1f8a45	257	ret = regulator_map_voltage_linear(rdev, uV, uV);
f6130be6 AJ	258	if (ret < 0)
	259	return ret;
	260
369cf602 AL	261	return da9055_reg_update(regulator->da9055, info->volt.reg_b,
369cf602 AL	262	info->volt.v_mask, ret);
f6130be6 AJ	263	}
	264
	265	static int da9055_suspend_enable(struct regulator_dev *rdev)
	266	{
	267	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	268	struct da9055_regulator_info *info = regulator->info;
	269
	270	/* Select register set B for voltage ramping. */
	271	if (regulator->reg_rselect == NO_GPIO)
	272	return da9055_reg_update(regulator->da9055, info->conf.reg,
	273	info->conf.sel_mask, DA9055_SEL_REG_B);
	274	else
	275	return 0;
	276	}
	277
	278	static int da9055_suspend_disable(struct regulator_dev *rdev)
	279	{
	280	struct da9055_regulator *regulator = rdev_get_drvdata(rdev);
	281	struct da9055_regulator_info *info = regulator->info;
	282
	283	/* Diselect register set B. */
	284	if (regulator->reg_rselect == NO_GPIO)
	285	return da9055_reg_update(regulator->da9055, info->conf.reg,
	286	info->conf.sel_mask, DA9055_SEL_REG_A);
	287	else
	288	return 0;
	289	}
	290
71242b49	291	static const struct regulator_ops da9055_buck_ops = {
f6130be6 AJ	292	.get_mode = da9055_buck_get_mode,
	293	.set_mode = da9055_buck_set_mode,
	294
941666e2 AL	295	.get_current_limit = regulator_get_current_limit_regmap,
941666e2 AL	296	.set_current_limit = regulator_set_current_limit_regmap,
f6130be6 AJ	297
	298	.get_voltage_sel = da9055_regulator_get_voltage_sel,
	299	.set_voltage_sel = da9055_regulator_set_voltage_sel,
6b1f8a45 AL	300	.list_voltage = regulator_list_voltage_linear,
6b1f8a45 AL	301	.map_voltage = regulator_map_voltage_linear,
f6130be6 AJ	302	.is_enabled = regulator_is_enabled_regmap,
	303	.enable = regulator_enable_regmap,
	304	.disable = regulator_disable_regmap,
	305
	306	.set_suspend_voltage = da9055_regulator_set_suspend_voltage,
	307	.set_suspend_enable = da9055_suspend_enable,
	308	.set_suspend_disable = da9055_suspend_disable,
	309	.set_suspend_mode = da9055_buck_set_mode,
	310	};
	311
71242b49	312	static const struct regulator_ops da9055_ldo_ops = {
f6130be6 AJ	313	.get_mode = da9055_ldo_get_mode,
	314	.set_mode = da9055_ldo_set_mode,
	315
	316	.get_voltage_sel = da9055_regulator_get_voltage_sel,
	317	.set_voltage_sel = da9055_regulator_set_voltage_sel,
6b1f8a45 AL	318	.list_voltage = regulator_list_voltage_linear,
6b1f8a45 AL	319	.map_voltage = regulator_map_voltage_linear,
f6130be6 AJ	320	.is_enabled = regulator_is_enabled_regmap,
	321	.enable = regulator_enable_regmap,
	322	.disable = regulator_disable_regmap,
	323
	324	.set_suspend_voltage = da9055_regulator_set_suspend_voltage,
	325	.set_suspend_enable = da9055_suspend_enable,
	326	.set_suspend_disable = da9055_suspend_disable,
	327	.set_suspend_mode = da9055_ldo_set_mode,
	328
	329	};
	330
	331	#define DA9055_LDO(_id, step, min, max, vbits, voffset) \
	332	{\
	333	.reg_desc = {\
	334	.name = #_id,\
db7ecb49 AL	335	.of_match = of_match_ptr(#_id),\
db7ecb49 AL	336	.regulators_node = of_match_ptr("regulators"),\
f6130be6 AJ	337	.ops = &da9055_ldo_ops,\
	338	.type = REGULATOR_VOLTAGE,\
	339	.id = DA9055_ID_##_id,\
369cf602	340	.n_voltages = (max - min) / step + 1 + (voffset), \
f6130be6 AJ	341	.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	342	.enable_mask = 1, \
	343	.min_uV = (min) * 1000,\
	344	.uV_step = (step) * 1000,\
6b1f8a45	345	.linear_min_sel = (voffset),\
f6130be6 AJ	346	.owner = THIS_MODULE,\
	347	},\
	348	.conf = {\
	349	.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	350	.sel_mask = (1 << 4),\
	351	.en_mask = 1,\
	352	},\
	353	.volt = {\
	354	.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
	355	.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
	356	.sl_shift = 7,\
f6130be6	357	.v_mask = (1 << (vbits)) - 1,\
f6130be6 AJ	358	},\
	359	}
	360
	361	#define DA9055_BUCK(_id, step, min, max, vbits, voffset, mbits, sbits) \
	362	{\
	363	.reg_desc = {\
	364	.name = #_id,\
db7ecb49 AL	365	.of_match = of_match_ptr(#_id),\
db7ecb49 AL	366	.regulators_node = of_match_ptr("regulators"),\
f6130be6 AJ	367	.ops = &da9055_buck_ops,\
	368	.type = REGULATOR_VOLTAGE,\
	369	.id = DA9055_ID_##_id,\
369cf602	370	.n_voltages = (max - min) / step + 1 + (voffset), \
f6130be6 AJ	371	.enable_reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	372	.enable_mask = 1,\
	373	.min_uV = (min) * 1000,\
	374	.uV_step = (step) * 1000,\
6b1f8a45	375	.linear_min_sel = (voffset),\
f6130be6	376	.owner = THIS_MODULE,\
941666e2 AL	377	.curr_table = da9055_current_limits,\
	378	.n_current_limits = ARRAY_SIZE(da9055_current_limits),\
	379	.csel_reg = DA9055_REG_BUCK_LIM,\
	380	.csel_mask = (mbits),\
f6130be6 AJ	381	},\
	382	.conf = {\
	383	.reg = DA9055_REG_BCORE_CONT + DA9055_ID_##_id, \
	384	.sel_mask = (1 << 4),\
	385	.en_mask = 1,\
	386	},\
	387	.volt = {\
	388	.reg_a = DA9055_REG_VBCORE_A + DA9055_ID_##_id, \
	389	.reg_b = DA9055_REG_VBCORE_B + DA9055_ID_##_id, \
	390	.sl_shift = 7,\
f6130be6	391	.v_mask = (1 << (vbits)) - 1,\
f6130be6 AJ	392	},\
	393	.mode = {\
	394	.reg = DA9055_REG_BCORE_MODE,\
	395	.mask = (mbits),\
	396	.shift = (sbits),\
	397	},\
	398	}
	399
	400	static struct da9055_regulator_info da9055_regulator_info[] = {
	401	DA9055_BUCK(BUCK1, 25, 725, 2075, 6, 9, 0xc, 2),
	402	DA9055_BUCK(BUCK2, 25, 925, 2500, 6, 0, 3, 0),
	403	DA9055_LDO(LDO1, 50, 900, 3300, 6, 2),
	404	DA9055_LDO(LDO2, 50, 900, 3300, 6, 3),
	405	DA9055_LDO(LDO3, 50, 900, 3300, 6, 2),
	406	DA9055_LDO(LDO4, 50, 900, 3300, 6, 2),
	407	DA9055_LDO(LDO5, 50, 900, 2750, 6, 2),
	408	DA9055_LDO(LDO6, 20, 900, 3300, 7, 0),
	409	};
	410
	411	/*
	412	* Configures regulator to be controlled either through GPIO 1 or 2.
	413	* GPIO can control regulator state and/or select the regulator register
	414	* set A/B for voltage ramping.
	415	*/
3d68dfe3 GKH	416	static int da9055_gpio_init(struct da9055_regulator *regulator,
	417	struct regulator_config *config,
	418	struct da9055_pdata *pdata, int id)
f6130be6 AJ	419	{
	420	struct da9055_regulator_info *info = regulator->info;
	421	int ret = 0;
	422
8b61a28d AT	423	if (!pdata)
	424	return 0;
	425
f6130be6 AJ	426	if (pdata->gpio_ren && pdata->gpio_ren[id]) {
	427	char name[18];
	428	int gpio_mux = pdata->gpio_ren[id];
	429
8d05560d	430	config->ena_gpiod = pdata->ena_gpiods[id];
f6130be6 AJ	431
	432	/*
	433	* GPI pin is muxed with regulator to control the
	434	* regulator state.
	435	*/
	436	sprintf(name, "DA9055 GPI %d", gpio_mux);
	437	ret = devm_gpio_request_one(config->dev, gpio_mux, GPIOF_DIR_IN,
	438	name);
	439	if (ret < 0)
	440	goto err;
	441
	442	/*
	443	* Let the regulator know that its state is controlled
	444	* through GPI.
	445	*/
	446	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	447	DA9055_E_GPI_MASK,
	448	pdata->reg_ren[id]
	449	<< DA9055_E_GPI_SHIFT);
	450	if (ret < 0)
	451	goto err;
	452	}
	453
26cbd307	454	if (pdata->gpio_rsel && pdata->gpio_rsel[id]) {
f6130be6 AJ	455	char name[18];
	456	int gpio_mux = pdata->gpio_rsel[id];
	457
	458	regulator->reg_rselect = pdata->reg_rsel[id];
	459
	460	/*
	461	* GPI pin is muxed with regulator to select the
	462	* regulator register set A/B for voltage ramping.
	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 register set A/B
	472	* will be selected through GPI for voltage ramping.
	473	*/
	474	ret = da9055_reg_update(regulator->da9055, info->conf.reg,
	475	DA9055_V_GPI_MASK,
	476	pdata->reg_rsel[id]
	477	<< DA9055_V_GPI_SHIFT);
	478	}
	479
	480	err:
	481	return ret;
	482	}
	483
	484	static irqreturn_t da9055_ldo5_6_oc_irq(int irq, void *data)
	485	{
	486	struct da9055_regulator *regulator = data;
	487
	488	regulator_notifier_call_chain(regulator->rdev,
	489	REGULATOR_EVENT_OVER_CURRENT, NULL);
	490
	491	return IRQ_HANDLED;
	492	}
	493
	494	static inline struct da9055_regulator_info *find_regulator_info(int id)
	495	{
	496	struct da9055_regulator_info *info;
	497	int i;
	498
	499	for (i = 0; i < ARRAY_SIZE(da9055_regulator_info); i++) {
	500	info = &da9055_regulator_info[i];
	501	if (info->reg_desc.id == id)
	502	return info;
	503	}
	504
	505	return NULL;
	506	}
	507
3d68dfe3	508	static int da9055_regulator_probe(struct platform_device *pdev)
f6130be6 AJ	509	{
	510	struct regulator_config config = { };
	511	struct da9055_regulator *regulator;
	512	struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
dff91d0b	513	struct da9055_pdata *pdata = dev_get_platdata(da9055->dev);
f6130be6 AJ	514	int ret, irq;
f6130be6 AJ	515
f6130be6 AJ	516	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9055_regulator),
	517	GFP_KERNEL);
	518	if (!regulator)
	519	return -ENOMEM;
	520
	521	regulator->info = find_regulator_info(pdev->id);
	522	if (regulator->info == NULL) {
	523	dev_err(&pdev->dev, "invalid regulator ID specified\n");
	524	return -EINVAL;
	525	}
	526
	527	regulator->da9055 = da9055;
db7ecb49	528	config.dev = da9055->dev;
f6130be6 AJ	529	config.driver_data = regulator;
	530	config.regmap = da9055->regmap;
	531
db7ecb49	532	if (pdata)
f6130be6 AJ	533	config.init_data = pdata->regulators[pdev->id];
	534
	535	ret = da9055_gpio_init(regulator, &config, pdata, pdev->id);
	536	if (ret < 0)
	537	return ret;
	538
0d328806 AL	539	regulator->rdev = devm_regulator_register(&pdev->dev,
	540	&regulator->info->reg_desc,
	541	&config);
f6130be6 AJ	542	if (IS_ERR(regulator->rdev)) {
	543	dev_err(&pdev->dev, "Failed to register regulator %s\n",
	544	regulator->info->reg_desc.name);
0d328806	545	return PTR_ERR(regulator->rdev);
f6130be6 AJ	546	}
	547
	548	/* Only LDO 5 and 6 has got the over current interrupt */
	549	if (pdev->id == DA9055_ID_LDO5 \|\| pdev->id == DA9055_ID_LDO6) {
	550	irq = platform_get_irq_byname(pdev, "REGULATOR");
f17083c3 AT	551	if (irq < 0)
	552	return irq;
	553
f6130be6 AJ	554	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
	555	da9055_ldo5_6_oc_irq,
	556	IRQF_TRIGGER_HIGH \|
	557	IRQF_ONESHOT \|
	558	IRQF_PROBE_SHARED,
	559	pdev->name, regulator);
	560	if (ret != 0) {
	561	if (ret != -EBUSY) {
	562	dev_err(&pdev->dev,
	563	"Failed to request Regulator IRQ %d: %d\n",
	564	irq, ret);
0d328806	565	return ret;
f6130be6 AJ	566	}
	567	}
	568	}
	569
	570	platform_set_drvdata(pdev, regulator);
	571
f6130be6 AJ	572	return 0;
	573	}
	574
	575	static struct platform_driver da9055_regulator_driver = {
	576	.probe = da9055_regulator_probe,
f6130be6 AJ	577	.driver = {
f6130be6 AJ	578	.name = "da9055-regulator",
f6130be6 AJ	579	},
	580	};
	581
	582	static int __init da9055_regulator_init(void)
	583	{
	584	return platform_driver_register(&da9055_regulator_driver);
	585	}
	586	subsys_initcall(da9055_regulator_init);
	587
	588	static void __exit da9055_regulator_exit(void)
	589	{
	590	platform_driver_unregister(&da9055_regulator_driver);
	591	}
	592	module_exit(da9055_regulator_exit);
	593
	594	MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
	595	MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9055 PMIC");
	596	MODULE_LICENSE("GPL");
	597	MODULE_ALIAS("platform:da9055-regulator");