drivers/regulator/axp20x-regulator.c - kernel/common - Git at Google

 /*
  * 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 AXP20X_WORKMODE_DCDC2_MASK	BIT(2)
 #define AXP20X_WORKMODE_DCDC3_MASK	BIT(1)

 #define AXP20X_FREQ_DCDC_MASK		0x0f

 #define AXP20X_DESC_IO(_id, _match, _supply, _min, _max, _step, _vreg, _vmask,	\
 		       _ereg, _emask, _enable_val, _disable_val)		\
 	[AXP20X_##_id] = {							\
 		.name		= #_id,						\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
 		.type		= REGULATOR_VOLTAGE,				\
 		.id		= AXP20X_##_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 AXP20X_DESC(_id, _match, _supply, _min, _max, _step, _vreg, _vmask,	\
 		    _ereg, _emask)						\
 	[AXP20X_##_id] = {							\
 		.name		= #_id,						\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
 		.type		= REGULATOR_VOLTAGE,				\
 		.id		= AXP20X_##_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 AXP20X_DESC_FIXED(_id, _match, _supply, _volt)				\
 	[AXP20X_##_id] = {							\
 		.name		= #_id,						\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
 		.type		= REGULATOR_VOLTAGE,				\
 		.id		= AXP20X_##_id,					\
 		.n_voltages	= 1,						\
 		.owner		= THIS_MODULE,					\
 		.min_uV		= (_volt) * 1000,				\
 		.ops		= &axp20x_ops_fixed				\
 	}

 #define AXP20X_DESC_TABLE(_id, _match, _supply, _table, _vreg, _vmask, _ereg,	\
 			  _emask)						\
 	[AXP20X_##_id] = {							\
 		.name		= #_id,						\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
 		.type		= REGULATOR_VOLTAGE,				\
 		.id		= AXP20X_##_id,					\
 		.n_voltages	= ARRAY_SIZE(_table),				\
 		.owner		= THIS_MODULE,					\
 		.vsel_reg	= (_vreg),					\
 		.vsel_mask	= (_vmask),					\
 		.enable_reg	= (_ereg),					\
 		.enable_mask	= (_emask),					\
 		.volt_table	= (_table),					\
 		.ops		= &axp20x_ops_table,				\
 	}

 static const int axp20x_ldo4_data[] = { 1250000, 1300000, 1400000, 1500000, 1600000,
 					1700000, 1800000, 1900000, 2000000, 2500000,
 					2700000, 2800000, 3000000, 3100000, 3200000,
 					3300000 };

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

 static struct regulator_ops axp20x_ops_table = {
 	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
 	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
 	.list_voltage		= regulator_list_voltage_table,
 	.map_voltage		= regulator_map_voltage_ascend,
 	.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 const struct regulator_desc axp20x_regulators[] = {
 	AXP20X_DESC(DCDC2, "dcdc2", "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT,
 		    0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
 	AXP20X_DESC(DCDC3, "dcdc3", "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT,
 		    0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
 	AXP20X_DESC_FIXED(LDO1, "ldo1", "acin", 1300),
 	AXP20X_DESC(LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
 		    AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
 	AXP20X_DESC(LDO3, "ldo3", "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT,
 		    0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
 	AXP20X_DESC_TABLE(LDO4, "ldo4", "ldo24in", axp20x_ldo4_data,
 			  AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08),
 	AXP20X_DESC_IO(LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
 		       AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
 		       AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
 };

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

 	if (dcdcfreq < 750) {
 		dcdcfreq = 750;
 		dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n");
 	}

 	if (dcdcfreq > 1875) {
 		dcdcfreq = 1875;
 		dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n");
 	}

 	dcdcfreq = (dcdcfreq - 750) / 75;

 	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;

 	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 {
 		dcdcfreq = 1500;
 		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)
 {
 	unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK;

 	if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
 		return -EINVAL;

 	if (id == AXP20X_DCDC3)
 		mask = AXP20X_WORKMODE_DCDC3_MASK;

 	workmode <<= ffs(mask) - 1;

 	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);
 	struct regulator_config config = {
 		.dev = pdev->dev.parent,
 		.regmap = axp20x->regmap,
 	};
 	int ret, i;
 	u32 workmode;

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

 	for (i = 0; i < AXP20X_REG_ID_MAX; i++) {
 		rdev = devm_regulator_register(&pdev->dev, &axp20x_regulators[i],
 					       &config);
 		if (IS_ERR(rdev)) {
 			dev_err(&pdev->dev, "Failed to register %s\n",
 				axp20x_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",
 					axp20x_regulators[i].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");
	/*
	* 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 AXP20X_WORKMODE_DCDC2_MASK BIT(2)
	#define AXP20X_WORKMODE_DCDC3_MASK BIT(1)

	#define AXP20X_FREQ_DCDC_MASK 0x0f

	#define AXP20X_DESC_IO(_id, _match, _supply, _min, _max, _step, _vreg, _vmask, \
	_ereg, _emask, _enable_val, _disable_val) \
	[AXP20X_##_id] = { \
	.name = #_id, \
	.supply_name = (_supply), \
	.of_match = of_match_ptr(_match), \
	.regulators_node = of_match_ptr("regulators"), \
	.type = REGULATOR_VOLTAGE, \
	.id = AXP20X_##_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 AXP20X_DESC(_id, _match, _supply, _min, _max, _step, _vreg, _vmask, \
	_ereg, _emask) \
	[AXP20X_##_id] = { \
	.name = #_id, \
	.supply_name = (_supply), \
	.of_match = of_match_ptr(_match), \
	.regulators_node = of_match_ptr("regulators"), \
	.type = REGULATOR_VOLTAGE, \
	.id = AXP20X_##_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 AXP20X_DESC_FIXED(_id, _match, _supply, _volt) \
	[AXP20X_##_id] = { \
	.name = #_id, \
	.supply_name = (_supply), \
	.of_match = of_match_ptr(_match), \
	.regulators_node = of_match_ptr("regulators"), \
	.type = REGULATOR_VOLTAGE, \
	.id = AXP20X_##_id, \
	.n_voltages = 1, \
	.owner = THIS_MODULE, \
	.min_uV = (_volt) * 1000, \
	.ops = &axp20x_ops_fixed \
	}

	#define AXP20X_DESC_TABLE(_id, _match, _supply, _table, _vreg, _vmask, _ereg, \
	_emask) \
	[AXP20X_##_id] = { \
	.name = #_id, \
	.supply_name = (_supply), \
	.of_match = of_match_ptr(_match), \
	.regulators_node = of_match_ptr("regulators"), \
	.type = REGULATOR_VOLTAGE, \
	.id = AXP20X_##_id, \
	.n_voltages = ARRAY_SIZE(_table), \
	.owner = THIS_MODULE, \
	.vsel_reg = (_vreg), \
	.vsel_mask = (_vmask), \
	.enable_reg = (_ereg), \
	.enable_mask = (_emask), \
	.volt_table = (_table), \
	.ops = &axp20x_ops_table, \
	}

	static const int axp20x_ldo4_data[] = { 1250000, 1300000, 1400000, 1500000, 1600000,
	1700000, 1800000, 1900000, 2000000, 2500000,
	2700000, 2800000, 3000000, 3100000, 3200000,
	3300000 };

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

	static struct regulator_ops axp20x_ops_table = {
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_table,
	.map_voltage = regulator_map_voltage_ascend,
	.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 const struct regulator_desc axp20x_regulators[] = {
	AXP20X_DESC(DCDC2, "dcdc2", "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT,
	0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
	AXP20X_DESC(DCDC3, "dcdc3", "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT,
	0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
	AXP20X_DESC_FIXED(LDO1, "ldo1", "acin", 1300),
	AXP20X_DESC(LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
	AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
	AXP20X_DESC(LDO3, "ldo3", "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT,
	0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
	AXP20X_DESC_TABLE(LDO4, "ldo4", "ldo24in", axp20x_ldo4_data,
	AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08),
	AXP20X_DESC_IO(LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
	AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
	AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
	};

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

	if (dcdcfreq < 750) {
	dcdcfreq = 750;
	dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n");
	}

	if (dcdcfreq > 1875) {
	dcdcfreq = 1875;
	dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n");
	}

	dcdcfreq = (dcdcfreq - 750) / 75;

	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;

	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 {
	dcdcfreq = 1500;
	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)
	{
	unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK;

	if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
	return -EINVAL;

	if (id == AXP20X_DCDC3)
	mask = AXP20X_WORKMODE_DCDC3_MASK;

	workmode <<= ffs(mask) - 1;

	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);
	struct regulator_config config = {
	.dev = pdev->dev.parent,
	.regmap = axp20x->regmap,
	};
	int ret, i;
	u32 workmode;

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

	for (i = 0; i < AXP20X_REG_ID_MAX; i++) {
	rdev = devm_regulator_register(&pdev->dev, &axp20x_regulators[i],
	&config);
	if (IS_ERR(rdev)) {
	dev_err(&pdev->dev, "Failed to register %s\n",
	axp20x_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",
	axp20x_regulators[i].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");