[deliverable/linux.git] / drivers / regulator / axp20x-regulator.c

/*
 * AXP20x regulators driver.
 *
 * Copyright (C) 2013 Carlo Caione <carlo@caione.org>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License. See the file "COPYING" in the main directory of this
 * archive for more details.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 */

#include <linux/err.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/mfd/axp20x.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>

#define AXP20X_IO_ENABLED		0x03
#define AXP20X_IO_DISABLED		0x07

#define AXP22X_IO_ENABLED		0x03
#define AXP22X_IO_DISABLED		0x04

#define AXP20X_WORKMODE_DCDC2_MASK	BIT(2)
#define AXP20X_WORKMODE_DCDC3_MASK	BIT(1)
#define AXP22X_WORKMODE_DCDCX_MASK(x)	BIT(x)

#define AXP20X_FREQ_DCDC_MASK		0x0f

#define AXP_DESC_IO(_family, _id, _match, _supply, _min, _max, _step, _vreg,	\
		    _vmask, _ereg, _emask, _enable_val, _disable_val)		\
	[_family##_##_id] = {							\
		.name		= (_match),					\
		.supply_name	= (_supply),					\
		.of_match	= of_match_ptr(_match),				\
		.regulators_node = of_match_ptr("regulators"),			\
		.type		= REGULATOR_VOLTAGE,				\
		.id		= _family##_##_id,				\
		.n_voltages	= (((_max) - (_min)) / (_step) + 1),		\
		.owner		= THIS_MODULE,					\
		.min_uV		= (_min) * 1000,				\
		.uV_step	= (_step) * 1000,				\
		.vsel_reg	= (_vreg),					\
		.vsel_mask	= (_vmask),					\
		.enable_reg	= (_ereg),					\
		.enable_mask	= (_emask),					\
		.enable_val	= (_enable_val),				\
		.disable_val	= (_disable_val),				\
		.ops		= &axp20x_ops,					\
	}

#define AXP_DESC(_family, _id, _match, _supply, _min, _max, _step, _vreg,	\
		 _vmask, _ereg, _emask) 					\
	[_family##_##_id] = {							\
		.name		= (_match),					\
		.supply_name	= (_supply),					\
		.of_match	= of_match_ptr(_match),				\
		.regulators_node = of_match_ptr("regulators"),			\
		.type		= REGULATOR_VOLTAGE,				\
		.id		= _family##_##_id,				\
		.n_voltages	= (((_max) - (_min)) / (_step) + 1),		\
		.owner		= THIS_MODULE,					\
		.min_uV		= (_min) * 1000,				\
		.uV_step	= (_step) * 1000,				\
		.vsel_reg	= (_vreg),					\
		.vsel_mask	= (_vmask),					\
		.enable_reg	= (_ereg),					\
		.enable_mask	= (_emask),					\
		.ops		= &axp20x_ops,					\
	}

#define AXP_DESC_SW(_family, _id, _match, _supply, _ereg, _emask)		\
	[_family##_##_id] = {							\
		.name		= (_match),					\
		.supply_name	= (_supply),					\
		.of_match	= of_match_ptr(_match),				\
		.regulators_node = of_match_ptr("regulators"),			\
		.type		= REGULATOR_VOLTAGE,				\
		.id		= _family##_##_id,				\
		.owner		= THIS_MODULE,					\
		.enable_reg	= (_ereg),					\
		.enable_mask	= (_emask),					\
		.ops		= &axp20x_ops_sw,				\
	}

#define AXP_DESC_FIXED(_family, _id, _match, _supply, _volt)			\
	[_family##_##_id] = {							\
		.name		= (_match),					\
		.supply_name	= (_supply),					\
		.of_match	= of_match_ptr(_match),				\
		.regulators_node = of_match_ptr("regulators"),			\
		.type		= REGULATOR_VOLTAGE,				\
		.id		= _family##_##_id,				\
		.n_voltages	= 1,						\
		.owner		= THIS_MODULE,					\
		.min_uV		= (_volt) * 1000,				\
		.ops		= &axp20x_ops_fixed				\
	}

#define AXP_DESC_RANGES(_family, _id, _match, _supply, _ranges, _n_voltages,	\
			_vreg, _vmask, _ereg, _emask)				\
	[_family##_##_id] = {							\
		.name		= (_match),					\
		.supply_name	= (_supply),					\
		.of_match	= of_match_ptr(_match),				\
		.regulators_node = of_match_ptr("regulators"),			\
		.type		= REGULATOR_VOLTAGE,				\
		.id		= _family##_##_id,				\
		.n_voltages	= (_n_voltages),				\
		.owner		= THIS_MODULE,					\
		.vsel_reg	= (_vreg),					\
		.vsel_mask	= (_vmask),					\
		.enable_reg	= (_ereg),					\
		.enable_mask	= (_emask),					\
		.linear_ranges	= (_ranges),					\
		.n_linear_ranges = ARRAY_SIZE(_ranges),				\
		.ops		= &axp20x_ops_range,				\
	}

static struct regulator_ops axp20x_ops_fixed = {
	.list_voltage		= regulator_list_voltage_linear,
};

static struct regulator_ops axp20x_ops_range = {
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear_range,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
};

static struct regulator_ops axp20x_ops = {
	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.list_voltage		= regulator_list_voltage_linear,
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
};

static struct regulator_ops axp20x_ops_sw = {
	.enable			= regulator_enable_regmap,
	.disable		= regulator_disable_regmap,
	.is_enabled		= regulator_is_enabled_regmap,
};

static const struct regulator_linear_range axp20x_ldo4_ranges[] = {
	REGULATOR_LINEAR_RANGE(1250000, 0x0, 0x0, 0),
	REGULATOR_LINEAR_RANGE(1300000, 0x1, 0x8, 100000),
	REGULATOR_LINEAR_RANGE(2500000, 0x9, 0x9, 0),
	REGULATOR_LINEAR_RANGE(2700000, 0xa, 0xb, 100000),
	REGULATOR_LINEAR_RANGE(3000000, 0xc, 0xf, 100000),
};

static const struct regulator_desc axp20x_regulators[] = {
	AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25,
		 AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
	AXP_DESC(AXP20X, DCDC3, "dcdc3", "vin3", 700, 3500, 25,
		 AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
	AXP_DESC_FIXED(AXP20X, LDO1, "ldo1", "acin", 1300),
	AXP_DESC(AXP20X, LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
		 AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
	AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25,
		 AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
	AXP_DESC_RANGES(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_ranges,
			16, AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL,
			0x08),
	AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
		    AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
		    AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
};

static const struct regulator_desc axp22x_regulators[] = {
	AXP_DESC(AXP22X, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
		 AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)),
	AXP_DESC(AXP22X, DCDC2, "dcdc2", "vin2", 600, 1540, 20,
		 AXP22X_DCDC2_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(2)),
	AXP_DESC(AXP22X, DCDC3, "dcdc3", "vin3", 600, 1860, 20,
		 AXP22X_DCDC3_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)),
	AXP_DESC(AXP22X, DCDC4, "dcdc4", "vin4", 600, 1540, 20,
		 AXP22X_DCDC4_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(4)),
	AXP_DESC(AXP22X, DCDC5, "dcdc5", "vin5", 1000, 2550, 50,
		 AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(5)),
	/* secondary switchable output of DCDC1 */
	AXP_DESC_SW(AXP22X, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2,
		    BIT(7)),
	/* LDO regulator internally chained to DCDC5 */
	AXP_DESC(AXP22X, DC5LDO, "dc5ldo", NULL, 700, 1400, 100,
		 AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)),
	AXP_DESC(AXP22X, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
		 AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(6)),
	AXP_DESC(AXP22X, ALDO2, "aldo2", "aldoin", 700, 3300, 100,
		 AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)),
	AXP_DESC(AXP22X, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
		 AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(7)),
	AXP_DESC(AXP22X, DLDO1, "dldo1", "dldoin", 700, 3300, 100,
		 AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(3)),
	AXP_DESC(AXP22X, DLDO2, "dldo2", "dldoin", 700, 3300, 100,
		 AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(4)),
	AXP_DESC(AXP22X, DLDO3, "dldo3", "dldoin", 700, 3300, 100,
		 AXP22X_DLDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
	AXP_DESC(AXP22X, DLDO4, "dldo4", "dldoin", 700, 3300, 100,
		 AXP22X_DLDO4_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(6)),
	AXP_DESC(AXP22X, ELDO1, "eldo1", "eldoin", 700, 3300, 100,
		 AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)),
	AXP_DESC(AXP22X, ELDO2, "eldo2", "eldoin", 700, 3300, 100,
		 AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)),
	AXP_DESC(AXP22X, ELDO3, "eldo3", "eldoin", 700, 3300, 100,
		 AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)),
	/* Note the datasheet only guarantees reliable operation up to
	 * 3.3V, this needs to be enforced via dts provided constraints */
	AXP_DESC_IO(AXP22X, LDO_IO0, "ldo_io0", "ips", 700, 3800, 100,
		    AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07,
		    AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
	/* Note the datasheet only guarantees reliable operation up to
	 * 3.3V, this needs to be enforced via dts provided constraints */
	AXP_DESC_IO(AXP22X, LDO_IO1, "ldo_io1", "ips", 700, 3800, 100,
		    AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07,
		    AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
	AXP_DESC_FIXED(AXP22X, RTC_LDO, "rtc_ldo", "ips", 3000),
};

static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
{
	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
	u32 min, max, def, step;

	switch (axp20x->variant) {
	case AXP202_ID:
	case AXP209_ID:
		min = 750;
		max = 1875;
		def = 1500;
		step = 75;
		break;
	case AXP221_ID:
	case AXP223_ID:
		min = 1800;
		max = 4050;
		def = 3000;
		step = 150;
		break;
	default:
		dev_err(&pdev->dev,
			"Setting DCDC frequency for unsupported AXP variant\n");
		return -EINVAL;
	}

	if (dcdcfreq == 0)
		dcdcfreq = def;

	if (dcdcfreq < min) {
		dcdcfreq = min;
		dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n",
			 min);
	}

	if (dcdcfreq > max) {
		dcdcfreq = max;
		dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n",
			 max);
	}

	dcdcfreq = (dcdcfreq - min) / step;

	return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ,
				  AXP20X_FREQ_DCDC_MASK, dcdcfreq);
}

static int axp20x_regulator_parse_dt(struct platform_device *pdev)
{
	struct device_node *np, *regulators;
	int ret;
	u32 dcdcfreq = 0;

	np = of_node_get(pdev->dev.parent->of_node);
	if (!np)
		return 0;

	regulators = of_get_child_by_name(np, "regulators");
	if (!regulators) {
		dev_warn(&pdev->dev, "regulators node not found\n");
	} else {
		of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq);
		ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
		if (ret < 0) {
			dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret);
			return ret;
		}

		of_node_put(regulators);
	}

	return 0;
}

static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
{
	struct axp20x_dev *axp20x = rdev_get_drvdata(rdev);
	unsigned int mask;

	switch (axp20x->variant) {
	case AXP202_ID:
	case AXP209_ID:
		if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
			return -EINVAL;

		mask = AXP20X_WORKMODE_DCDC2_MASK;
		if (id == AXP20X_DCDC3)
			mask = AXP20X_WORKMODE_DCDC3_MASK;

		workmode <<= ffs(mask) - 1;
		break;

	case AXP221_ID:
	case AXP223_ID:
		if (id < AXP22X_DCDC1 || id > AXP22X_DCDC5)
			return -EINVAL;

		mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP22X_DCDC1);
		workmode <<= id - AXP22X_DCDC1;
		break;

	default:
		/* should not happen */
		WARN_ON(1);
		return -EINVAL;
	}

	return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
}

static int axp20x_regulator_probe(struct platform_device *pdev)
{
	struct regulator_dev *rdev;
	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
	const struct regulator_desc *regulators;
	struct regulator_config config = {
		.dev = pdev->dev.parent,
		.regmap = axp20x->regmap,
		.driver_data = axp20x,
	};
	int ret, i, nregulators;
	u32 workmode;
	const char *axp22x_dc1_name = axp22x_regulators[AXP22X_DCDC1].name;
	const char *axp22x_dc5_name = axp22x_regulators[AXP22X_DCDC5].name;

	switch (axp20x->variant) {
	case AXP202_ID:
	case AXP209_ID:
		regulators = axp20x_regulators;
		nregulators = AXP20X_REG_ID_MAX;
		break;
	case AXP221_ID:
	case AXP223_ID:
		regulators = axp22x_regulators;
		nregulators = AXP22X_REG_ID_MAX;
		break;
	default:
		dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n",
			axp20x->variant);
		return -EINVAL;
	}

	/* This only sets the dcdc freq. Ignore any errors */
	axp20x_regulator_parse_dt(pdev);

	for (i = 0; i < nregulators; i++) {
		const struct regulator_desc *desc = &regulators[i];
		struct regulator_desc *new_desc;

		/*
		 * Regulators DC1SW and DC5LDO are connected internally,
		 * so we have to handle their supply names separately.
		 *
		 * We always register the regulators in proper sequence,
		 * so the supply names are correctly read. See the last
		 * part of this loop to see where we save the DT defined
		 * name.
		 */
		if (regulators == axp22x_regulators) {
			if (i == AXP22X_DC1SW) {
				new_desc = devm_kzalloc(&pdev->dev,
							sizeof(*desc),
							GFP_KERNEL);
				*new_desc = regulators[i];
				new_desc->supply_name = axp22x_dc1_name;
				desc = new_desc;
			} else if (i == AXP22X_DC5LDO) {
				new_desc = devm_kzalloc(&pdev->dev,
							sizeof(*desc),
							GFP_KERNEL);
				*new_desc = regulators[i];
				new_desc->supply_name = axp22x_dc5_name;
				desc = new_desc;
			}
		}

		rdev = devm_regulator_register(&pdev->dev, desc, &config);
		if (IS_ERR(rdev)) {
			dev_err(&pdev->dev, "Failed to register %s\n",
				regulators[i].name);

			return PTR_ERR(rdev);
		}

		ret = of_property_read_u32(rdev->dev.of_node,
					   "x-powers,dcdc-workmode",
					   &workmode);
		if (!ret) {
			if (axp20x_set_dcdc_workmode(rdev, i, workmode))
				dev_err(&pdev->dev, "Failed to set workmode on %s\n",
					rdev->desc->name);
		}

		/*
		 * Save AXP22X DCDC1 / DCDC5 regulator names for later.
		 */
		if (regulators == axp22x_regulators) {
			/* Can we use rdev->constraints->name instead? */
			if (i == AXP22X_DCDC1)
				of_property_read_string(rdev->dev.of_node,
							"regulator-name",
							&axp22x_dc1_name);
			else if (i == AXP22X_DCDC5)
				of_property_read_string(rdev->dev.of_node,
							"regulator-name",
							&axp22x_dc5_name);
		}
	}

	return 0;
}

static struct platform_driver axp20x_regulator_driver = {
	.probe	= axp20x_regulator_probe,
	.driver	= {
		.name		= "axp20x-regulator",
	},
};

module_platform_driver(axp20x_regulator_driver);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");
MODULE_ALIAS("platform:axp20x-regulator");
Commit	Line	Data
dfe7a1b0 CC	1	/*
	2	* AXP20x regulators driver.
	3	*
	4	* Copyright (C) 2013 Carlo Caione <carlo@caione.org>
	5	*
	6	* This file is subject to the terms and conditions of the GNU General
	7	* Public License. See the file "COPYING" in the main directory of this
	8	* archive for more details.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*/
	15
	16	#include <linux/err.h>
	17	#include <linux/init.h>
	18	#include <linux/module.h>
	19	#include <linux/of.h>
	20	#include <linux/of_device.h>
	21	#include <linux/platform_device.h>
	22	#include <linux/regmap.h>
	23	#include <linux/mfd/axp20x.h>
	24	#include <linux/regulator/driver.h>
	25	#include <linux/regulator/of_regulator.h>
	26
	27	#define AXP20X_IO_ENABLED 0x03
	28	#define AXP20X_IO_DISABLED 0x07
	29
3cb99e2e CYT	30	#define AXP22X_IO_ENABLED 0x03
3cb99e2e CYT	31	#define AXP22X_IO_DISABLED 0x04
1b82b4e4	32
dfe7a1b0 CC	33	#define AXP20X_WORKMODE_DCDC2_MASK BIT(2)
dfe7a1b0 CC	34	#define AXP20X_WORKMODE_DCDC3_MASK BIT(1)
1b82b4e4	35	#define AXP22X_WORKMODE_DCDCX_MASK(x) BIT(x)
dfe7a1b0 CC	36
	37	#define AXP20X_FREQ_DCDC_MASK 0x0f
	38
866bd951 BB	39	#define AXP_DESC_IO(_family, _id, _match, _supply, _min, _max, _step, _vreg, \
	40	_vmask, _ereg, _emask, _enable_val, _disable_val) \
	41	[_family##_##_id] = { \
e0bbb38c	42	.name = (_match), \
dfe7a1b0	43	.supply_name = (_supply), \
880fe82d CYT	44	.of_match = of_match_ptr(_match), \
880fe82d CYT	45	.regulators_node = of_match_ptr("regulators"), \
dfe7a1b0	46	.type = REGULATOR_VOLTAGE, \
866bd951	47	.id = _family##_##_id, \
dfe7a1b0 CC	48	.n_voltages = (((_max) - (_min)) / (_step) + 1), \
	49	.owner = THIS_MODULE, \
	50	.min_uV = (_min) * 1000, \
	51	.uV_step = (_step) * 1000, \
	52	.vsel_reg = (_vreg), \
	53	.vsel_mask = (_vmask), \
	54	.enable_reg = (_ereg), \
	55	.enable_mask = (_emask), \
	56	.enable_val = (_enable_val), \
	57	.disable_val = (_disable_val), \
	58	.ops = &axp20x_ops, \
	59	}
	60
866bd951 BB	61	#define AXP_DESC(_family, _id, _match, _supply, _min, _max, _step, _vreg, \
	62	_vmask, _ereg, _emask) \
	63	[_family##_##_id] = { \
e0bbb38c	64	.name = (_match), \
dfe7a1b0	65	.supply_name = (_supply), \
880fe82d CYT	66	.of_match = of_match_ptr(_match), \
880fe82d CYT	67	.regulators_node = of_match_ptr("regulators"), \
dfe7a1b0	68	.type = REGULATOR_VOLTAGE, \
866bd951	69	.id = _family##_##_id, \
dfe7a1b0 CC	70	.n_voltages = (((_max) - (_min)) / (_step) + 1), \
	71	.owner = THIS_MODULE, \
	72	.min_uV = (_min) * 1000, \
	73	.uV_step = (_step) * 1000, \
	74	.vsel_reg = (_vreg), \
	75	.vsel_mask = (_vmask), \
	76	.enable_reg = (_ereg), \
	77	.enable_mask = (_emask), \
	78	.ops = &axp20x_ops, \
	79	}
	80
94c39041	81	#define AXP_DESC_SW(_family, _id, _match, _supply, _ereg, _emask) \
1b82b4e4	82	[_family##_##_id] = { \
e0bbb38c	83	.name = (_match), \
1b82b4e4 BB	84	.supply_name = (_supply), \
	85	.of_match = of_match_ptr(_match), \
	86	.regulators_node = of_match_ptr("regulators"), \
	87	.type = REGULATOR_VOLTAGE, \
	88	.id = _family##_##_id, \
1b82b4e4	89	.owner = THIS_MODULE, \
1b82b4e4 BB	90	.enable_reg = (_ereg), \
	91	.enable_mask = (_emask), \
	92	.ops = &axp20x_ops_sw, \
	93	}
	94
866bd951 BB	95	#define AXP_DESC_FIXED(_family, _id, _match, _supply, _volt) \
866bd951 BB	96	[_family##_##_id] = { \
e0bbb38c	97	.name = (_match), \
dfe7a1b0	98	.supply_name = (_supply), \
880fe82d CYT	99	.of_match = of_match_ptr(_match), \
880fe82d CYT	100	.regulators_node = of_match_ptr("regulators"), \
dfe7a1b0	101	.type = REGULATOR_VOLTAGE, \
866bd951	102	.id = _family##_##_id, \
dfe7a1b0 CC	103	.n_voltages = 1, \
	104	.owner = THIS_MODULE, \
	105	.min_uV = (_volt) * 1000, \
	106	.ops = &axp20x_ops_fixed \
	107	}
	108
13d57e64 CYT	109	#define AXP_DESC_RANGES(_family, _id, _match, _supply, _ranges, _n_voltages, \
13d57e64 CYT	110	_vreg, _vmask, _ereg, _emask) \
866bd951	111	[_family##_##_id] = { \
e0bbb38c	112	.name = (_match), \
dfe7a1b0	113	.supply_name = (_supply), \
880fe82d CYT	114	.of_match = of_match_ptr(_match), \
880fe82d CYT	115	.regulators_node = of_match_ptr("regulators"), \
dfe7a1b0	116	.type = REGULATOR_VOLTAGE, \
866bd951	117	.id = _family##_##_id, \
13d57e64	118	.n_voltages = (_n_voltages), \
dfe7a1b0 CC	119	.owner = THIS_MODULE, \
	120	.vsel_reg = (_vreg), \
	121	.vsel_mask = (_vmask), \
	122	.enable_reg = (_ereg), \
	123	.enable_mask = (_emask), \
13d57e64 CYT	124	.linear_ranges = (_ranges), \
	125	.n_linear_ranges = ARRAY_SIZE(_ranges), \
	126	.ops = &axp20x_ops_range, \
dfe7a1b0 CC	127	}
dfe7a1b0 CC	128
dfe7a1b0 CC	129	static struct regulator_ops axp20x_ops_fixed = {
	130	.list_voltage = regulator_list_voltage_linear,
	131	};
	132
13d57e64	133	static struct regulator_ops axp20x_ops_range = {
dfe7a1b0 CC	134	.set_voltage_sel = regulator_set_voltage_sel_regmap,
dfe7a1b0 CC	135	.get_voltage_sel = regulator_get_voltage_sel_regmap,
13d57e64	136	.list_voltage = regulator_list_voltage_linear_range,
dfe7a1b0 CC	137	.enable = regulator_enable_regmap,
	138	.disable = regulator_disable_regmap,
	139	.is_enabled = regulator_is_enabled_regmap,
	140	};
	141
	142	static struct regulator_ops axp20x_ops = {
	143	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	144	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	145	.list_voltage = regulator_list_voltage_linear,
	146	.enable = regulator_enable_regmap,
	147	.disable = regulator_disable_regmap,
	148	.is_enabled = regulator_is_enabled_regmap,
	149	};
	150
1b82b4e4	151	static struct regulator_ops axp20x_ops_sw = {
1b82b4e4 BB	152	.enable = regulator_enable_regmap,
	153	.disable = regulator_disable_regmap,
	154	.is_enabled = regulator_is_enabled_regmap,
	155	};
	156
13d57e64 CYT	157	static const struct regulator_linear_range axp20x_ldo4_ranges[] = {
	158	REGULATOR_LINEAR_RANGE(1250000, 0x0, 0x0, 0),
	159	REGULATOR_LINEAR_RANGE(1300000, 0x1, 0x8, 100000),
8d4d5c3a MR	160	REGULATOR_LINEAR_RANGE(2500000, 0x9, 0x9, 0),
	161	REGULATOR_LINEAR_RANGE(2700000, 0xa, 0xb, 100000),
	162	REGULATOR_LINEAR_RANGE(3000000, 0xc, 0xf, 100000),
13d57e64 CYT	163	};
13d57e64 CYT	164
dfe7a1b0	165	static const struct regulator_desc axp20x_regulators[] = {
866bd951 BB	166	AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25,
	167	AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
	168	AXP_DESC(AXP20X, DCDC3, "dcdc3", "vin3", 700, 3500, 25,
	169	AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
	170	AXP_DESC_FIXED(AXP20X, LDO1, "ldo1", "acin", 1300),
	171	AXP_DESC(AXP20X, LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
	172	AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
	173	AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25,
	174	AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
13d57e64 CYT	175	AXP_DESC_RANGES(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_ranges,
	176	16, AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL,
	177	0x08),
866bd951 BB	178	AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
	179	AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
	180	AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
dfe7a1b0 CC	181	};
dfe7a1b0 CC	182
1b82b4e4 BB	183	static const struct regulator_desc axp22x_regulators[] = {
	184	AXP_DESC(AXP22X, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
	185	AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)),
	186	AXP_DESC(AXP22X, DCDC2, "dcdc2", "vin2", 600, 1540, 20,
	187	AXP22X_DCDC2_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(2)),
	188	AXP_DESC(AXP22X, DCDC3, "dcdc3", "vin3", 600, 1860, 20,
	189	AXP22X_DCDC3_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)),
	190	AXP_DESC(AXP22X, DCDC4, "dcdc4", "vin4", 600, 1540, 20,
6b3600b4	191	AXP22X_DCDC4_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(4)),
1b82b4e4	192	AXP_DESC(AXP22X, DCDC5, "dcdc5", "vin5", 1000, 2550, 50,
6b3600b4	193	AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(5)),
1b82b4e4	194	/* secondary switchable output of DCDC1 */
94c39041 CYT	195	AXP_DESC_SW(AXP22X, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2,
94c39041 CYT	196	BIT(7)),
1b82b4e4	197	/* LDO regulator internally chained to DCDC5 */
7118f19c	198	AXP_DESC(AXP22X, DC5LDO, "dc5ldo", NULL, 700, 1400, 100,
1b82b4e4 BB	199	AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)),
	200	AXP_DESC(AXP22X, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
	201	AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(6)),
	202	AXP_DESC(AXP22X, ALDO2, "aldo2", "aldoin", 700, 3300, 100,
	203	AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)),
	204	AXP_DESC(AXP22X, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
	205	AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(7)),
	206	AXP_DESC(AXP22X, DLDO1, "dldo1", "dldoin", 700, 3300, 100,
	207	AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(3)),
	208	AXP_DESC(AXP22X, DLDO2, "dldo2", "dldoin", 700, 3300, 100,
	209	AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(4)),
	210	AXP_DESC(AXP22X, DLDO3, "dldo3", "dldoin", 700, 3300, 100,
	211	AXP22X_DLDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
	212	AXP_DESC(AXP22X, DLDO4, "dldo4", "dldoin", 700, 3300, 100,
	213	AXP22X_DLDO4_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(6)),
	214	AXP_DESC(AXP22X, ELDO1, "eldo1", "eldoin", 700, 3300, 100,
	215	AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)),
	216	AXP_DESC(AXP22X, ELDO2, "eldo2", "eldoin", 700, 3300, 100,
	217	AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)),
	218	AXP_DESC(AXP22X, ELDO3, "eldo3", "eldoin", 700, 3300, 100,
	219	AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)),
f40d4896 HG	220	/* Note the datasheet only guarantees reliable operation up to
	221	* 3.3V, this needs to be enforced via dts provided constraints */
	222	AXP_DESC_IO(AXP22X, LDO_IO0, "ldo_io0", "ips", 700, 3800, 100,
1b82b4e4 BB	223	AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07,
1b82b4e4 BB	224	AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
f40d4896 HG	225	/* Note the datasheet only guarantees reliable operation up to
	226	* 3.3V, this needs to be enforced via dts provided constraints */
	227	AXP_DESC_IO(AXP22X, LDO_IO1, "ldo_io1", "ips", 700, 3800, 100,
1b82b4e4 BB	228	AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07,
	229	AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
	230	AXP_DESC_FIXED(AXP22X, RTC_LDO, "rtc_ldo", "ips", 3000),
	231	};
	232
dfe7a1b0 CC	233	static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
	234	{
	235	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
866bd951 BB	236	u32 min, max, def, step;
	237
	238	switch (axp20x->variant) {
	239	case AXP202_ID:
	240	case AXP209_ID:
	241	min = 750;
	242	max = 1875;
	243	def = 1500;
	244	step = 75;
	245	break;
1b82b4e4	246	case AXP221_ID:
04e0981c	247	case AXP223_ID:
1b82b4e4 BB	248	min = 1800;
	249	max = 4050;
	250	def = 3000;
	251	step = 150;
	252	break;
866bd951 BB	253	default:
	254	dev_err(&pdev->dev,
	255	"Setting DCDC frequency for unsupported AXP variant\n");
	256	return -EINVAL;
	257	}
	258
	259	if (dcdcfreq == 0)
	260	dcdcfreq = def;
dfe7a1b0	261
866bd951 BB	262	if (dcdcfreq < min) {
	263	dcdcfreq = min;
	264	dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n",
	265	min);
dfe7a1b0 CC	266	}
dfe7a1b0 CC	267
866bd951 BB	268	if (dcdcfreq > max) {
	269	dcdcfreq = max;
	270	dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n",
	271	max);
dfe7a1b0 CC	272	}
dfe7a1b0 CC	273
866bd951	274	dcdcfreq = (dcdcfreq - min) / step;
dfe7a1b0 CC	275
	276	return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ,
	277	AXP20X_FREQ_DCDC_MASK, dcdcfreq);
	278	}
	279
	280	static int axp20x_regulator_parse_dt(struct platform_device *pdev)
	281	{
	282	struct device_node np, regulators;
	283	int ret;
866bd951	284	u32 dcdcfreq = 0;
dfe7a1b0 CC	285
	286	np = of_node_get(pdev->dev.parent->of_node);
	287	if (!np)
	288	return 0;
	289
a6016c52	290	regulators = of_get_child_by_name(np, "regulators");
dfe7a1b0 CC	291	if (!regulators) {
	292	dev_warn(&pdev->dev, "regulators node not found\n");
	293	} else {
dfe7a1b0 CC	294	of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq);
	295	ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
	296	if (ret < 0) {
	297	dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret);
	298	return ret;
	299	}
	300
	301	of_node_put(regulators);
	302	}
	303
	304	return 0;
	305	}
	306
	307	static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
	308	{
866bd951 BB	309	struct axp20x_dev *axp20x = rdev_get_drvdata(rdev);
866bd951 BB	310	unsigned int mask;
dfe7a1b0	311
866bd951 BB	312	switch (axp20x->variant) {
	313	case AXP202_ID:
	314	case AXP209_ID:
	315	if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
	316	return -EINVAL;
	317
	318	mask = AXP20X_WORKMODE_DCDC2_MASK;
	319	if (id == AXP20X_DCDC3)
	320	mask = AXP20X_WORKMODE_DCDC3_MASK;
dfe7a1b0	321
866bd951 BB	322	workmode <<= ffs(mask) - 1;
866bd951 BB	323	break;
dfe7a1b0	324
1b82b4e4	325	case AXP221_ID:
04e0981c	326	case AXP223_ID:
1b82b4e4 BB	327	if (id < AXP22X_DCDC1 \|\| id > AXP22X_DCDC5)
	328	return -EINVAL;
	329
	330	mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP22X_DCDC1);
	331	workmode <<= id - AXP22X_DCDC1;
	332	break;
	333
866bd951 BB	334	default:
	335	/* should not happen */
	336	WARN_ON(1);
	337	return -EINVAL;
	338	}
dfe7a1b0 CC	339
	340	return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
	341	}
	342
	343	static int axp20x_regulator_probe(struct platform_device *pdev)
	344	{
	345	struct regulator_dev *rdev;
	346	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
866bd951	347	const struct regulator_desc *regulators;
765e8023 CYT	348	struct regulator_config config = {
	349	.dev = pdev->dev.parent,
	350	.regmap = axp20x->regmap,
866bd951	351	.driver_data = axp20x,
765e8023	352	};
866bd951	353	int ret, i, nregulators;
dfe7a1b0	354	u32 workmode;
7118f19c CYT	355	const char *axp22x_dc1_name = axp22x_regulators[AXP22X_DCDC1].name;
7118f19c CYT	356	const char *axp22x_dc5_name = axp22x_regulators[AXP22X_DCDC5].name;
dfe7a1b0	357
866bd951 BB	358	switch (axp20x->variant) {
	359	case AXP202_ID:
	360	case AXP209_ID:
	361	regulators = axp20x_regulators;
	362	nregulators = AXP20X_REG_ID_MAX;
	363	break;
1b82b4e4	364	case AXP221_ID:
04e0981c	365	case AXP223_ID:
1b82b4e4 BB	366	regulators = axp22x_regulators;
	367	nregulators = AXP22X_REG_ID_MAX;
	368	break;
866bd951 BB	369	default:
	370	dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n",
	371	axp20x->variant);
	372	return -EINVAL;
	373	}
	374
765e8023 CYT	375	/* This only sets the dcdc freq. Ignore any errors */
765e8023 CYT	376	axp20x_regulator_parse_dt(pdev);
dfe7a1b0	377
866bd951	378	for (i = 0; i < nregulators; i++) {
7118f19c CYT	379	const struct regulator_desc *desc = &regulators[i];
	380	struct regulator_desc *new_desc;
	381
	382	/*
	383	* Regulators DC1SW and DC5LDO are connected internally,
	384	* so we have to handle their supply names separately.
	385	*
	386	* We always register the regulators in proper sequence,
	387	* so the supply names are correctly read. See the last
	388	* part of this loop to see where we save the DT defined
	389	* name.
	390	*/
	391	if (regulators == axp22x_regulators) {
	392	if (i == AXP22X_DC1SW) {
	393	new_desc = devm_kzalloc(&pdev->dev,
	394	sizeof(*desc),
	395	GFP_KERNEL);
	396	*new_desc = regulators[i];
	397	new_desc->supply_name = axp22x_dc1_name;
	398	desc = new_desc;
	399	} else if (i == AXP22X_DC5LDO) {
	400	new_desc = devm_kzalloc(&pdev->dev,
	401	sizeof(*desc),
	402	GFP_KERNEL);
	403	*new_desc = regulators[i];
	404	new_desc->supply_name = axp22x_dc5_name;
	405	desc = new_desc;
	406	}
	407	}
	408
	409	rdev = devm_regulator_register(&pdev->dev, desc, &config);
dfe7a1b0 CC	410	if (IS_ERR(rdev)) {
dfe7a1b0 CC	411	dev_err(&pdev->dev, "Failed to register %s\n",
866bd951	412	regulators[i].name);
dfe7a1b0 CC	413
	414	return PTR_ERR(rdev);
	415	}
	416
765e8023 CYT	417	ret = of_property_read_u32(rdev->dev.of_node,
765e8023 CYT	418	"x-powers,dcdc-workmode",
dfe7a1b0 CC	419	&workmode);
	420	if (!ret) {
	421	if (axp20x_set_dcdc_workmode(rdev, i, workmode))
	422	dev_err(&pdev->dev, "Failed to set workmode on %s\n",
866bd951	423	rdev->desc->name);
dfe7a1b0	424	}
7118f19c CYT	425
	426	/*
	427	* Save AXP22X DCDC1 / DCDC5 regulator names for later.
	428	*/
	429	if (regulators == axp22x_regulators) {
	430	/* Can we use rdev->constraints->name instead? */
	431	if (i == AXP22X_DCDC1)
	432	of_property_read_string(rdev->dev.of_node,
	433	"regulator-name",
	434	&axp22x_dc1_name);
	435	else if (i == AXP22X_DCDC5)
	436	of_property_read_string(rdev->dev.of_node,
	437	"regulator-name",
	438	&axp22x_dc5_name);
	439	}
dfe7a1b0 CC	440	}
	441
	442	return 0;
	443	}
	444
	445	static struct platform_driver axp20x_regulator_driver = {
	446	.probe = axp20x_regulator_probe,
	447	.driver = {
	448	.name = "axp20x-regulator",
dfe7a1b0 CC	449	},
	450	};
	451
	452	module_platform_driver(axp20x_regulator_driver);
	453
	454	MODULE_LICENSE("GPL v2");
	455	MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
	456	MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");
d4ea7d86	457	MODULE_ALIAS("platform:axp20x-regulator");