make mc13783 regulator code generic (167e3d8a) · Commits · e / devices / android_kernel_teracube_emerald

drivers/regulator/Kconfig

+4 −0

Original line number	Original line	Diff line number	Diff line
	@@ -186,9 +186,13 @@ config REGULATOR_PCAP
	This driver provides support for the voltage regulators of the		This driver provides support for the voltage regulators of the
	PCAP2 PMIC.		PCAP2 PMIC.

			config REGULATOR_MC13XXX_CORE
			bool

	config REGULATOR_MC13783		config REGULATOR_MC13783
	tristate "Support regulators on Freescale MC13783 PMIC"		tristate "Support regulators on Freescale MC13783 PMIC"
	depends on MFD_MC13783		depends on MFD_MC13783
			select REGULATOR_MC13XXX_CORE
	help		help
	Say y here to support the regulators found on the Freescale MC13783		Say y here to support the regulators found on the Freescale MC13783
	PMIC.		PMIC.

drivers/regulator/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -30,6 +30,7 @@ obj-$(CONFIG_REGULATOR_DA903X) += da903x.o
	obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o		obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
	obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o		obj-$(CONFIG_REGULATOR_PCAP) += pcap-regulator.o
	obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o		obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
			obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o
	obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o		obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o

	obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o		obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o

drivers/regulator/mc13783-regulator.c

+43 −282

Original line number	Original line	Diff line number	Diff line
	/*		/*
	* Regulator Driver for Freescale MC13783 PMIC		* Regulator Driver for Freescale MC13783 PMIC
	*		*
			* Copyright 2010 Yong Shen <yong.shen@linaro.org>
	* Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>		* Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
	* Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>		* Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
	*		*
	@@ -17,6 +18,7 @@
	#include <linux/slab.h>		#include <linux/slab.h>
	#include <linux/init.h>		#include <linux/init.h>
	#include <linux/err.h>		#include <linux/err.h>
			#include "mc13xxx.h"

	#define MC13783_REG_SWITCHERS5 29		#define MC13783_REG_SWITCHERS5 29
	#define MC13783_REG_SWITCHERS5_SW3EN (1 << 20)		#define MC13783_REG_SWITCHERS5_SW3EN (1 << 20)
	@@ -89,16 +91,6 @@
	#define MC13783_REG_POWERMISC_PWGTSPI_M (3 << 15)		#define MC13783_REG_POWERMISC_PWGTSPI_M (3 << 15)


	struct mc13783_regulator {
	struct regulator_desc desc;
	int reg;
	int enable_bit;
	int vsel_reg;
	int vsel_shift;
	int vsel_mask;
	int const *voltages;
	};

	/* Voltage Values */		/* Voltage Values */
	static const int mc13783_sw3_val[] = {		static const int mc13783_sw3_val[] = {
	5000000, 5000000, 5000000, 5500000,		5000000, 5000000, 5000000, 5500000,
	@@ -175,64 +167,26 @@ static const int mc13783_pwgtdrv_val[] = {
	5500000,		5500000,
	};		};

	static struct regulator_ops mc13783_regulator_ops;
	static struct regulator_ops mc13783_fixed_regulator_ops;
	static struct regulator_ops mc13783_gpo_regulator_ops;		static struct regulator_ops mc13783_gpo_regulator_ops;

	#define MC13783_DEFINE(prefix, _name, _reg, _vsel_reg, _voltages) \		#define MC13783_DEFINE(prefix, name, reg, vsel_reg, voltages) \
	[MC13783_ ## prefix ## _ ## _name] = { \		MC13xxx_DEFINE(MC13783_REG_, name, reg, vsel_reg, voltages, \
	.desc = { \		mc13xxx_regulator_ops)
	.name = #prefix "_" #_name, \
	.n_voltages = ARRAY_SIZE(_voltages), \
	.ops = &mc13783_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = MC13783_ ## prefix ## _ ## _name, \
	.owner = THIS_MODULE, \
	}, \
	.reg = MC13783_REG_ ## _reg, \
	.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
	.vsel_reg = MC13783_REG_ ## _vsel_reg, \
	.vsel_shift = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL,\
	.vsel_mask = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL_M,\
	.voltages = _voltages, \
	}

	#define MC13783_FIXED_DEFINE(prefix, _name, _reg, _voltages) \		#define MC13783_FIXED_DEFINE(prefix, name, reg, voltages) \
	[MC13783_ ## prefix ## _ ## _name] = { \		MC13xxx_FIXED_DEFINE(MC13783_REG_, name, reg, voltages, \
	.desc = { \		mc13xxx_fixed_regulator_ops)
	.name = #prefix "_" #_name, \
	.n_voltages = ARRAY_SIZE(_voltages), \
	.ops = &mc13783_fixed_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = MC13783_ ## prefix ## _ ## _name, \
	.owner = THIS_MODULE, \
	}, \
	.reg = MC13783_REG_ ## _reg, \
	.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
	.voltages = _voltages, \
	}

	#define MC13783_GPO_DEFINE(prefix, _name, _reg, _voltages) \		#define MC13783_GPO_DEFINE(prefix, name, reg, voltages) \
	[MC13783_ ## prefix ## _ ## _name] = { \		MC13xxx_GPO_DEFINE(MC13783_REG_, name, reg, voltages, \
	.desc = { \		mc13783_gpo_regulator_ops)
	.name = #prefix "_" #_name, \
	.n_voltages = ARRAY_SIZE(_voltages), \
	.ops = &mc13783_gpo_regulator_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = MC13783_ ## prefix ## _ ## _name, \
	.owner = THIS_MODULE, \
	}, \
	.reg = MC13783_REG_ ## _reg, \
	.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
	.voltages = _voltages, \
	}

	#define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages) \		#define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages) \
	MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)		MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
	#define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages) \		#define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages) \
	MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)		MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)

	static struct mc13783_regulator mc13783_regulators[] = {		static struct mc13xxx_regulator mc13783_regulators[] = {
	MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),		MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),

	MC13783_FIXED_DEFINE(REG, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),		MC13783_FIXED_DEFINE(REG, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
	@@ -274,213 +228,16 @@ static struct mc13783_regulator mc13783_regulators[] = {
	MC13783_GPO_DEFINE(REG, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),		MC13783_GPO_DEFINE(REG, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
	};		};

	struct mc13783_regulator_priv {		static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
	struct mc13783 *mc13783;
	u32 powermisc_pwgt_state;
	struct regulator_dev *regulators[];
	};

	static int mc13783_regulator_enable(struct regulator_dev *rdev)
	{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int ret;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
	mc13783_regulators[id].enable_bit,
	mc13783_regulators[id].enable_bit);
	mc13783_unlock(priv->mc13783);

	return ret;
	}

	static int mc13783_regulator_disable(struct regulator_dev *rdev)
	{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int id = rdev_get_id(rdev);
	int ret;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
	mc13783_regulators[id].enable_bit, 0);
	mc13783_unlock(priv->mc13783);

	return ret;
	}

	static int mc13783_regulator_is_enabled(struct regulator_dev *rdev)
	{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int ret, id = rdev_get_id(rdev);
	unsigned int val;

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
	mc13783_unlock(priv->mc13783);

	if (ret)
	return ret;

	return (val & mc13783_regulators[id].enable_bit) != 0;
	}

	static int mc13783_regulator_list_voltage(struct regulator_dev *rdev,
	unsigned selector)
	{
	int id = rdev_get_id(rdev);

	if (selector >= mc13783_regulators[id].desc.n_voltages)
	return -EINVAL;

	return mc13783_regulators[id].voltages[selector];
	}

	static int mc13783_get_best_voltage_index(struct regulator_dev *rdev,
	int min_uV, int max_uV)
	{
	int reg_id = rdev_get_id(rdev);
	int i;
	int bestmatch;
	int bestindex;

	/*
	* Locate the minimum voltage fitting the criteria on
	* this regulator. The switchable voltages are not
	* in strict falling order so we need to check them
	* all for the best match.
	*/
	bestmatch = INT_MAX;
	bestindex = -1;
	for (i = 0; i < mc13783_regulators[reg_id].desc.n_voltages; i++) {
	if (mc13783_regulators[reg_id].voltages[i] >= min_uV &&
	mc13783_regulators[reg_id].voltages[i] < bestmatch) {
	bestmatch = mc13783_regulators[reg_id].voltages[i];
	bestindex = i;
	}
	}

	if (bestindex < 0 \|\| bestmatch > max_uV) {
	dev_warn(&rdev->dev, "no possible value for %d<=x<=%d uV\n",
	min_uV, max_uV);
	return -EINVAL;
	}
	return bestindex;
	}

	static int mc13783_regulator_set_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV,
	unsigned *selector)
	{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int value, id = rdev_get_id(rdev);
	int ret;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
	__func__, id, min_uV, max_uV);

	/* Find the best index */
	value = mc13783_get_best_voltage_index(rdev, min_uV, max_uV);
	dev_dbg(rdev_get_dev(rdev), "%s best value: %d \n", __func__, value);
	if (value < 0)
	return value;

	*selector = value;

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].vsel_reg,
	mc13783_regulators[id].vsel_mask,
	value << mc13783_regulators[id].vsel_shift);
	mc13783_unlock(priv->mc13783);

	return ret;
	}

	static int mc13783_regulator_get_voltage(struct regulator_dev *rdev)
	{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
	int ret, id = rdev_get_id(rdev);
	unsigned int val;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	mc13783_lock(priv->mc13783);
	ret = mc13783_reg_read(priv->mc13783,
	mc13783_regulators[id].vsel_reg, &val);
	mc13783_unlock(priv->mc13783);

	if (ret)
	return ret;

	val = (val & mc13783_regulators[id].vsel_mask)
	>> mc13783_regulators[id].vsel_shift;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);

	BUG_ON(val < 0 \|\| val > mc13783_regulators[id].desc.n_voltages);

	return mc13783_regulators[id].voltages[val];
	}

	static struct regulator_ops mc13783_regulator_ops = {
	.enable = mc13783_regulator_enable,
	.disable = mc13783_regulator_disable,
	.is_enabled = mc13783_regulator_is_enabled,
	.list_voltage = mc13783_regulator_list_voltage,
	.set_voltage = mc13783_regulator_set_voltage,
	.get_voltage = mc13783_regulator_get_voltage,
	};

	static int mc13783_fixed_regulator_set_voltage(struct regulator_dev *rdev,
	int min_uV, int max_uV,
	unsigned int *selector)
	{
	int id = rdev_get_id(rdev);

	dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
	__func__, id, min_uV, max_uV);

	*selector = 0;

	if (min_uV >= mc13783_regulators[id].voltages[0] &&
	max_uV <= mc13783_regulators[id].voltages[0])
	return 0;
	else
	return -EINVAL;
	}

	static int mc13783_fixed_regulator_get_voltage(struct regulator_dev *rdev)
	{
	int id = rdev_get_id(rdev);

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	return mc13783_regulators[id].voltages[0];
	}

	static struct regulator_ops mc13783_fixed_regulator_ops = {
	.enable = mc13783_regulator_enable,
	.disable = mc13783_regulator_disable,
	.is_enabled = mc13783_regulator_is_enabled,
	.list_voltage = mc13783_regulator_list_voltage,
	.set_voltage = mc13783_fixed_regulator_set_voltage,
	.get_voltage = mc13783_fixed_regulator_get_voltage,
	};

	static int mc13783_powermisc_rmw(struct mc13783_regulator_priv *priv, u32 mask,
	u32 val)		u32 val)
	{		{
	struct mc13783 *mc13783 = priv->mc13783;		struct mc13xxx *mc13783 = priv->mc13xxx;
	int ret;		int ret;
	u32 valread;		u32 valread;

	BUG_ON(val & ~mask);		BUG_ON(val & ~mask);

	ret = mc13783_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);		ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
	if (ret)		if (ret)
	return ret;		return ret;

	@@ -495,15 +252,16 @@ static int mc13783_powermisc_rmw(struct mc13783_regulator_priv *priv, u32 mask,
	valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) \|		valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) \|
	priv->powermisc_pwgt_state;		priv->powermisc_pwgt_state;

	return mc13783_reg_write(mc13783, MC13783_REG_POWERMISC, valread);		return mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
	}		}

	static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)		static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
	{		{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);		struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
	int id = rdev_get_id(rdev);		int id = rdev_get_id(rdev);
	int ret;		int ret;
	u32 en_val = mc13783_regulators[id].enable_bit;		u32 en_val = mc13xxx_regulators[id].enable_bit;

	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);		dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

	@@ -512,17 +270,18 @@ static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
	id == MC13783_REG_PWGT2SPI)		id == MC13783_REG_PWGT2SPI)
	en_val = 0;		en_val = 0;

	mc13783_lock(priv->mc13783);		mc13xxx_lock(priv->mc13xxx);
	ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit,		ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
	en_val);		en_val);
	mc13783_unlock(priv->mc13783);		mc13xxx_unlock(priv->mc13xxx);

	return ret;		return ret;
	}		}

	static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)		static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
	{		{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);		struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
	int id = rdev_get_id(rdev);		int id = rdev_get_id(rdev);
	int ret;		int ret;
	u32 dis_val = 0;		u32 dis_val = 0;
	@@ -532,25 +291,26 @@ static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
	/* Power Gate disable value is 1 */		/* Power Gate disable value is 1 */
	if (id == MC13783_REG_PWGT1SPI \|\|		if (id == MC13783_REG_PWGT1SPI \|\|
	id == MC13783_REG_PWGT2SPI)		id == MC13783_REG_PWGT2SPI)
	dis_val = mc13783_regulators[id].enable_bit;		dis_val = mc13xxx_regulators[id].enable_bit;

	mc13783_lock(priv->mc13783);		mc13xxx_lock(priv->mc13xxx);
	ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit,		ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
	dis_val);		dis_val);
	mc13783_unlock(priv->mc13783);		mc13xxx_unlock(priv->mc13xxx);

	return ret;		return ret;
	}		}

	static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)		static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
	{		{
	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);		struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
	int ret, id = rdev_get_id(rdev);		int ret, id = rdev_get_id(rdev);
	unsigned int val;		unsigned int val;

	mc13783_lock(priv->mc13783);		mc13xxx_lock(priv->mc13xxx);
	ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);		ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
	mc13783_unlock(priv->mc13783);		mc13xxx_unlock(priv->mc13xxx);

	if (ret)		if (ret)
	return ret;		return ret;
	@@ -560,22 +320,22 @@ static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
	val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) \|		val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) \|
	(priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);		(priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);

	return (val & mc13783_regulators[id].enable_bit) != 0;		return (val & mc13xxx_regulators[id].enable_bit) != 0;
	}		}

	static struct regulator_ops mc13783_gpo_regulator_ops = {		static struct regulator_ops mc13783_gpo_regulator_ops = {
	.enable = mc13783_gpo_regulator_enable,		.enable = mc13783_gpo_regulator_enable,
	.disable = mc13783_gpo_regulator_disable,		.disable = mc13783_gpo_regulator_disable,
	.is_enabled = mc13783_gpo_regulator_is_enabled,		.is_enabled = mc13783_gpo_regulator_is_enabled,
	.list_voltage = mc13783_regulator_list_voltage,		.list_voltage = mc13xxx_regulator_list_voltage,
	.set_voltage = mc13783_fixed_regulator_set_voltage,		.set_voltage = mc13xxx_fixed_regulator_set_voltage,
	.get_voltage = mc13783_fixed_regulator_get_voltage,		.get_voltage = mc13xxx_fixed_regulator_get_voltage,
	};		};

	static int __devinit mc13783_regulator_probe(struct platform_device *pdev)		static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
	{		{
	struct mc13783_regulator_priv *priv;		struct mc13xxx_regulator_priv *priv;
	struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);		struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
	struct mc13783_regulator_platform_data *pdata =		struct mc13783_regulator_platform_data *pdata =
	dev_get_platdata(&pdev->dev);		dev_get_platdata(&pdev->dev);
	struct mc13783_regulator_init_data *init_data;		struct mc13783_regulator_init_data *init_data;
	@@ -589,7 +349,8 @@ static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
	if (!priv)		if (!priv)
	return -ENOMEM;		return -ENOMEM;

	priv->mc13783 = mc13783;		priv->mc13xxx_regulators = mc13783_regulators;
			priv->mc13xxx = mc13783;

	for (i = 0; i < pdata->num_regulators; i++) {		for (i = 0; i < pdata->num_regulators; i++) {
	init_data = &pdata->regulators[i];		init_data = &pdata->regulators[i];
	@@ -619,7 +380,7 @@ static int __devinit mc13783_regulator_probe(struct platform_device *pdev)

	static int __devexit mc13783_regulator_remove(struct platform_device *pdev)		static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
	{		{
	struct mc13783_regulator_priv *priv = platform_get_drvdata(pdev);		struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
	struct mc13783_regulator_platform_data *pdata =		struct mc13783_regulator_platform_data *pdata =
	dev_get_platdata(&pdev->dev);		dev_get_platdata(&pdev->dev);
	int i;		int i;

drivers/regulator/mc13xxx-regulator-core.c

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			/*
			* Regulator Driver for Freescale MC13xxx PMIC
			*
			* Copyright 2010 Yong Shen <yong.shen@linaro.org>
			*
			* Based on mc13783 regulator driver :
			* Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
			* Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
			*
			* This program is free software; you can redistribute it and/or modify
			* it under the terms of the GNU General Public License version 2 as
			* published by the Free Software Foundation.
			*
			* Regs infos taken from mc13xxx drivers from freescale and mc13xxx.pdf file
			* from freescale
			*/

			#include <linux/mfd/mc13xxx.h>
			#include <linux/regulator/machine.h>
			#include <linux/regulator/driver.h>
			#include <linux/platform_device.h>
			#include <linux/kernel.h>
			#include <linux/slab.h>
			#include <linux/init.h>
			#include <linux/err.h>
			#include "mc13xxx.h"

			static int mc13xxx_regulator_enable(struct regulator_dev *rdev)
			{
			struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
			int id = rdev_get_id(rdev);
			int ret;

			dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

			mc13xxx_lock(priv->mc13xxx);
			ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg,
			mc13xxx_regulators[id].enable_bit,
			mc13xxx_regulators[id].enable_bit);
			mc13xxx_unlock(priv->mc13xxx);

			return ret;
			}

			static int mc13xxx_regulator_disable(struct regulator_dev *rdev)
			{
			struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
			int id = rdev_get_id(rdev);
			int ret;

			dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

			mc13xxx_lock(priv->mc13xxx);
			ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].reg,
			mc13xxx_regulators[id].enable_bit, 0);
			mc13xxx_unlock(priv->mc13xxx);

			return ret;
			}

			static int mc13xxx_regulator_is_enabled(struct regulator_dev *rdev)
			{
			struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
			int ret, id = rdev_get_id(rdev);
			unsigned int val;

			mc13xxx_lock(priv->mc13xxx);
			ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
			mc13xxx_unlock(priv->mc13xxx);

			if (ret)
			return ret;

			return (val & mc13xxx_regulators[id].enable_bit) != 0;
			}

			int mc13xxx_regulator_list_voltage(struct regulator_dev *rdev,
			unsigned selector)
			{
			int id = rdev_get_id(rdev);
			struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;

			if (selector >= mc13xxx_regulators[id].desc.n_voltages)
			return -EINVAL;

			return mc13xxx_regulators[id].voltages[selector];
			}

			int mc13xxx_get_best_voltage_index(struct regulator_dev *rdev,
			int min_uV, int max_uV)
			{
			struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
			int reg_id = rdev_get_id(rdev);
			int i;
			int bestmatch;
			int bestindex;

			/*
			* Locate the minimum voltage fitting the criteria on
			* this regulator. The switchable voltages are not
			* in strict falling order so we need to check them
			* all for the best match.
			*/
			bestmatch = INT_MAX;
			bestindex = -1;
			for (i = 0; i < mc13xxx_regulators[reg_id].desc.n_voltages; i++) {
			if (mc13xxx_regulators[reg_id].voltages[i] >= min_uV &&
			mc13xxx_regulators[reg_id].voltages[i] < bestmatch) {
			bestmatch = mc13xxx_regulators[reg_id].voltages[i];
			bestindex = i;
			}
			}

			if (bestindex < 0 \|\| bestmatch > max_uV) {
			dev_warn(&rdev->dev, "no possible value for %d<=x<=%d uV\n",
			min_uV, max_uV);
			return -EINVAL;
			}
			return bestindex;
			}

			static int mc13xxx_regulator_set_voltage(struct regulator_dev *rdev, int min_uV,
			int max_uV, unsigned *selector)
			{
			struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
			int value, id = rdev_get_id(rdev);
			int ret;

			dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
			__func__, id, min_uV, max_uV);

			/* Find the best index */
			value = mc13xxx_get_best_voltage_index(rdev, min_uV, max_uV);
			dev_dbg(rdev_get_dev(rdev), "%s best value: %d\n", __func__, value);
			if (value < 0)
			return value;

			mc13xxx_lock(priv->mc13xxx);
			ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13xxx_regulators[id].vsel_reg,
			mc13xxx_regulators[id].vsel_mask,
			value << mc13xxx_regulators[id].vsel_shift);
			mc13xxx_unlock(priv->mc13xxx);

			return ret;
			}

			static int mc13xxx_regulator_get_voltage(struct regulator_dev *rdev)
			{
			struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
			int ret, id = rdev_get_id(rdev);
			unsigned int val;

			dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

			mc13xxx_lock(priv->mc13xxx);
			ret = mc13xxx_reg_read(priv->mc13xxx,
			mc13xxx_regulators[id].vsel_reg, &val);
			mc13xxx_unlock(priv->mc13xxx);

			if (ret)
			return ret;

			val = (val & mc13xxx_regulators[id].vsel_mask)
			>> mc13xxx_regulators[id].vsel_shift;

			dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);

			BUG_ON(val < 0 \|\| val > mc13xxx_regulators[id].desc.n_voltages);

			return mc13xxx_regulators[id].voltages[val];
			}

			struct regulator_ops mc13xxx_regulator_ops = {
			.enable = mc13xxx_regulator_enable,
			.disable = mc13xxx_regulator_disable,
			.is_enabled = mc13xxx_regulator_is_enabled,
			.list_voltage = mc13xxx_regulator_list_voltage,
			.set_voltage = mc13xxx_regulator_set_voltage,
			.get_voltage = mc13xxx_regulator_get_voltage,
			};

			int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev, int min_uV,
			int max_uV, unsigned *selector)
			{
			struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
			int id = rdev_get_id(rdev);

			dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
			__func__, id, min_uV, max_uV);

			if (min_uV >= mc13xxx_regulators[id].voltages[0] &&
			max_uV <= mc13xxx_regulators[id].voltages[0])
			return 0;
			else
			return -EINVAL;
			}

			int mc13xxx_fixed_regulator_get_voltage(struct regulator_dev *rdev)
			{
			struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
			struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
			int id = rdev_get_id(rdev);

			dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);

			return mc13xxx_regulators[id].voltages[0];
			}

			struct regulator_ops mc13xxx_fixed_regulator_ops = {
			.enable = mc13xxx_regulator_enable,
			.disable = mc13xxx_regulator_disable,
			.is_enabled = mc13xxx_regulator_is_enabled,
			.list_voltage = mc13xxx_regulator_list_voltage,
			.set_voltage = mc13xxx_fixed_regulator_set_voltage,
			.get_voltage = mc13xxx_fixed_regulator_get_voltage,
			};

			int mc13xxx_sw_regulator_is_enabled(struct regulator_dev *rdev)
			{
			return 1;
			}

			MODULE_LICENSE("GPL v2");
			MODULE_AUTHOR("Yong Shen <yong.shen@linaro.org>");
			MODULE_DESCRIPTION("Regulator Driver for Freescale MC13xxx PMIC");
			MODULE_ALIAS("mc13xxx-regulator-core");

drivers/regulator/mc13xxx.h

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			/*
			* mc13xxx.h - regulators for the Freescale mc13xxx PMIC
			*
			* Copyright (C) 2010 Yong Shen <yong.shen@linaro.org>
			*
			* 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.
			*/

			#ifndef __LINUX_REGULATOR_MC13XXX_H
			#define __LINUX_REGULATOR_MC13XXX_H

			#include <linux/regulator/driver.h>

			struct mc13xxx_regulator {
			struct regulator_desc desc;
			int reg;
			int enable_bit;
			int vsel_reg;
			int vsel_shift;
			int vsel_mask;
			int hi_bit;
			int const *voltages;
			};

			struct mc13xxx_regulator_priv {
			struct mc13xxx *mc13xxx;
			u32 powermisc_pwgt_state;
			struct mc13xxx_regulator *mc13xxx_regulators;
			struct regulator_dev *regulators[];
			};

			extern int mc13xxx_sw_regulator(struct regulator_dev *rdev);
			extern int mc13xxx_sw_regulator_is_enabled(struct regulator_dev *rdev);
			extern int mc13xxx_get_best_voltage_index(struct regulator_dev *rdev,
			int min_uV, int max_uV);
			extern int mc13xxx_regulator_list_voltage(struct regulator_dev *rdev,
			unsigned selector);
			extern int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev,
			int min_uV, int max_uV, unsigned *selector);
			extern int mc13xxx_fixed_regulator_get_voltage(struct regulator_dev *rdev);

			extern struct regulator_ops mc13xxx_regulator_ops;
			extern struct regulator_ops mc13xxx_fixed_regulator_ops;

			#define MC13xxx_DEFINE(prefix, _name, _reg, _vsel_reg, _voltages, _ops) \
			[prefix ## _name] = { \
			.desc = { \
			.name = #prefix "_" #_name, \
			.n_voltages = ARRAY_SIZE(_voltages), \
			.ops = &_ops, \
			.type = REGULATOR_VOLTAGE, \
			.id = prefix ## _name, \
			.owner = THIS_MODULE, \
			}, \
			.reg = prefix ## _reg, \
			.enable_bit = prefix ## _reg ## _ ## _name ## EN, \
			.vsel_reg = prefix ## _vsel_reg, \
			.vsel_shift = prefix ## _vsel_reg ## _ ## _name ## VSEL,\
			.vsel_mask = prefix ## _vsel_reg ## _ ## _name ## VSEL_M,\
			.voltages = _voltages, \
			}

			#define MC13xxx_FIXED_DEFINE(prefix, _name, _reg, _voltages, _ops) \
			[prefix ## _name] = { \
			.desc = { \
			.name = #prefix "_" #_name, \
			.n_voltages = ARRAY_SIZE(_voltages), \
			.ops = &_ops, \
			.type = REGULATOR_VOLTAGE, \
			.id = prefix ## _name, \
			.owner = THIS_MODULE, \
			}, \
			.reg = prefix ## _reg, \
			.enable_bit = prefix ## _reg ## _ ## _name ## EN, \
			.voltages = _voltages, \
			}

			#define MC13xxx_GPO_DEFINE(prefix, _name, _reg, _voltages, _ops) \
			[prefix ## _name] = { \
			.desc = { \
			.name = #prefix "_" #_name, \
			.n_voltages = ARRAY_SIZE(_voltages), \
			.ops = &_ops, \
			.type = REGULATOR_VOLTAGE, \
			.id = prefix ## _name, \
			.owner = THIS_MODULE, \
			}, \
			.reg = prefix ## _reg, \
			.enable_bit = prefix ## _reg ## _ ## _name ## EN, \
			.voltages = _voltages, \
			}

			#define MC13xxx_DEFINE_SW(_name, _reg, _vsel_reg, _voltages, ops) \
			MC13xxx_DEFINE(SW, _name, _reg, _vsel_reg, _voltages, ops)
			#define MC13xxx_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages, ops) \
			MC13xxx_DEFINE(REGU, _name, _reg, _vsel_reg, _voltages, ops)

			#endif