[mirror_ubuntu-zesty-kernel.git] / drivers / regulator / mc13783-regulator.c

/*
 * Regulator Driver for Freescale MC13783 PMIC
 *
 * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
 *
 * 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.
 */

#include <linux/mfd/mc13783.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/driver.h>
#include <linux/platform_device.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>

#define MC13783_REG_SWITCHERS4			28
#define MC13783_REG_SWITCHERS4_PLLEN			(1 << 18)

#define MC13783_REG_SWITCHERS5			29
#define MC13783_REG_SWITCHERS5_SW3EN			(1 << 20)

#define MC13783_REG_REGULATORMODE0		32
#define MC13783_REG_REGULATORMODE0_VAUDIOEN		(1 << 0)
#define MC13783_REG_REGULATORMODE0_VIOHIEN		(1 << 3)
#define MC13783_REG_REGULATORMODE0_VIOLOEN		(1 << 6)
#define MC13783_REG_REGULATORMODE0_VDIGEN		(1 << 9)
#define MC13783_REG_REGULATORMODE0_VGENEN		(1 << 12)
#define MC13783_REG_REGULATORMODE0_VRFDIGEN		(1 << 15)
#define MC13783_REG_REGULATORMODE0_VRFREFEN		(1 << 18)
#define MC13783_REG_REGULATORMODE0_VRFCPEN		(1 << 21)

#define MC13783_REG_REGULATORMODE1		33
#define MC13783_REG_REGULATORMODE1_VSIMEN		(1 << 0)
#define MC13783_REG_REGULATORMODE1_VESIMEN		(1 << 3)
#define MC13783_REG_REGULATORMODE1_VCAMEN		(1 << 6)
#define MC13783_REG_REGULATORMODE1_VRFBGEN		(1 << 9)
#define MC13783_REG_REGULATORMODE1_VVIBEN		(1 << 11)
#define MC13783_REG_REGULATORMODE1_VRF1EN		(1 << 12)
#define MC13783_REG_REGULATORMODE1_VRF2EN		(1 << 15)
#define MC13783_REG_REGULATORMODE1_VMMC1EN		(1 << 18)
#define MC13783_REG_REGULATORMODE1_VMMC2EN		(1 << 21)

#define MC13783_REG_POWERMISC			34
#define MC13783_REG_POWERMISC_GPO1EN			(1 << 6)
#define MC13783_REG_POWERMISC_GPO2EN			(1 << 8)
#define MC13783_REG_POWERMISC_GPO3EN			(1 << 10)
#define MC13783_REG_POWERMISC_GPO4EN			(1 << 12)

struct mc13783_regulator {
	struct regulator_desc desc;
	int reg;
	int enable_bit;
};

static struct regulator_ops mc13783_regulator_ops;

#define MC13783_DEFINE(prefix, _name, _reg)				\
	[MC13783_ ## prefix ## _ ## _name] = {				\
		.desc = {						\
			.name = #prefix "_" #_name,			\
			.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,	\
	}

#define MC13783_DEFINE_SW(_name, _reg) MC13783_DEFINE(SW, _name, _reg)
#define MC13783_DEFINE_REGU(_name, _reg) MC13783_DEFINE(REGU, _name, _reg)

static struct mc13783_regulator mc13783_regulators[] = {
	MC13783_DEFINE_SW(SW3, SWITCHERS5),
	MC13783_DEFINE_SW(PLL, SWITCHERS4),

	MC13783_DEFINE_REGU(VAUDIO, REGULATORMODE0),
	MC13783_DEFINE_REGU(VIOHI, REGULATORMODE0),
	MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0),
	MC13783_DEFINE_REGU(VDIG, REGULATORMODE0),
	MC13783_DEFINE_REGU(VGEN, REGULATORMODE0),
	MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0),
	MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0),
	MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0),
	MC13783_DEFINE_REGU(VSIM, REGULATORMODE1),
	MC13783_DEFINE_REGU(VESIM, REGULATORMODE1),
	MC13783_DEFINE_REGU(VCAM, REGULATORMODE1),
	MC13783_DEFINE_REGU(VRFBG, REGULATORMODE1),
	MC13783_DEFINE_REGU(VVIB, REGULATORMODE1),
	MC13783_DEFINE_REGU(VRF1, REGULATORMODE1),
	MC13783_DEFINE_REGU(VRF2, REGULATORMODE1),
	MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1),
	MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1),
	MC13783_DEFINE_REGU(GPO1, POWERMISC),
	MC13783_DEFINE_REGU(GPO2, POWERMISC),
	MC13783_DEFINE_REGU(GPO3, POWERMISC),
	MC13783_DEFINE_REGU(GPO4, POWERMISC),
};

struct mc13783_regulator_priv {
	struct mc13783 *mc13783;
	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 struct regulator_ops mc13783_regulator_ops = {
	.enable = mc13783_regulator_enable,
	.disable = mc13783_regulator_disable,
	.is_enabled = mc13783_regulator_is_enabled,
};

static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
{
	struct mc13783_regulator_priv *priv;
	struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
	struct mc13783_regulator_platform_data *pdata =
		dev_get_platdata(&pdev->dev);
	struct mc13783_regulator_init_data *init_data;
	int i, ret;

	dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);

	priv = kzalloc(sizeof(*priv) +
			pdata->num_regulators * sizeof(priv->regulators[0]),
			GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	priv->mc13783 = mc13783;

	for (i = 0; i < pdata->num_regulators; i++) {
		init_data = &pdata->regulators[i];
		priv->regulators[i] = regulator_register(
				&mc13783_regulators[init_data->id].desc,
				&pdev->dev, init_data->init_data, priv);

		if (IS_ERR(priv->regulators[i])) {
			dev_err(&pdev->dev, "failed to register regulator %s\n",
				mc13783_regulators[i].desc.name);
			ret = PTR_ERR(priv->regulators[i]);
			goto err;
		}
	}

	platform_set_drvdata(pdev, priv);

	return 0;
err:
	while (--i >= 0)
		regulator_unregister(priv->regulators[i]);

	kfree(priv);

	return ret;
}

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

	for (i = 0; i < pdata->num_regulators; i++)
		regulator_unregister(priv->regulators[i]);

	return 0;
}

static struct platform_driver mc13783_regulator_driver = {
	.driver	= {
		.name	= "mc13783-regulator",
		.owner	= THIS_MODULE,
	},
	.remove		= __devexit_p(mc13783_regulator_remove),
	.probe		= mc13783_regulator_probe,
};

static int __init mc13783_regulator_init(void)
{
	return platform_driver_register(&mc13783_regulator_driver);
}
subsys_initcall(mc13783_regulator_init);

static void __exit mc13783_regulator_exit(void)
{
	platform_driver_unregister(&mc13783_regulator_driver);
}
module_exit(mc13783_regulator_exit);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
MODULE_ALIAS("platform:mc13783-regulator");
Commit	Line	Data
295c08bc SH	1	/*
	2	* Regulator Driver for Freescale MC13783 PMIC
	3	*
	4	* Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10
a10099bc	11	#include <linux/mfd/mc13783.h>
295c08bc SH	12	#include <linux/regulator/machine.h>
	13	#include <linux/regulator/driver.h>
	14	#include <linux/platform_device.h>
295c08bc SH	15	#include <linux/kernel.h>
	16	#include <linux/init.h>
	17	#include <linux/err.h>
	18
a10099bc UKK	19	#define MC13783_REG_SWITCHERS4 28
	20	#define MC13783_REG_SWITCHERS4_PLLEN (1 << 18)
	21
	22	#define MC13783_REG_SWITCHERS5 29
	23	#define MC13783_REG_SWITCHERS5_SW3EN (1 << 20)
	24
	25	#define MC13783_REG_REGULATORMODE0 32
	26	#define MC13783_REG_REGULATORMODE0_VAUDIOEN (1 << 0)
	27	#define MC13783_REG_REGULATORMODE0_VIOHIEN (1 << 3)
	28	#define MC13783_REG_REGULATORMODE0_VIOLOEN (1 << 6)
	29	#define MC13783_REG_REGULATORMODE0_VDIGEN (1 << 9)
	30	#define MC13783_REG_REGULATORMODE0_VGENEN (1 << 12)
	31	#define MC13783_REG_REGULATORMODE0_VRFDIGEN (1 << 15)
	32	#define MC13783_REG_REGULATORMODE0_VRFREFEN (1 << 18)
	33	#define MC13783_REG_REGULATORMODE0_VRFCPEN (1 << 21)
	34
	35	#define MC13783_REG_REGULATORMODE1 33
	36	#define MC13783_REG_REGULATORMODE1_VSIMEN (1 << 0)
	37	#define MC13783_REG_REGULATORMODE1_VESIMEN (1 << 3)
	38	#define MC13783_REG_REGULATORMODE1_VCAMEN (1 << 6)
	39	#define MC13783_REG_REGULATORMODE1_VRFBGEN (1 << 9)
	40	#define MC13783_REG_REGULATORMODE1_VVIBEN (1 << 11)
	41	#define MC13783_REG_REGULATORMODE1_VRF1EN (1 << 12)
	42	#define MC13783_REG_REGULATORMODE1_VRF2EN (1 << 15)
	43	#define MC13783_REG_REGULATORMODE1_VMMC1EN (1 << 18)
	44	#define MC13783_REG_REGULATORMODE1_VMMC2EN (1 << 21)
	45
	46	#define MC13783_REG_POWERMISC 34
	47	#define MC13783_REG_POWERMISC_GPO1EN (1 << 6)
	48	#define MC13783_REG_POWERMISC_GPO2EN (1 << 8)
	49	#define MC13783_REG_POWERMISC_GPO3EN (1 << 10)
	50	#define MC13783_REG_POWERMISC_GPO4EN (1 << 12)
	51
295c08bc SH	52	struct mc13783_regulator {
	53	struct regulator_desc desc;
	54	int reg;
	55	int enable_bit;
	56	};
	57
	58	static struct regulator_ops mc13783_regulator_ops;
	59
a10099bc UKK	60	#define MC13783_DEFINE(prefix, _name, _reg) \
	61	[MC13783_ ## prefix ## _ ## _name] = { \
	62	.desc = { \
	63	.name = #prefix "_" #_name, \
	64	.ops = &mc13783_regulator_ops, \
	65	.type = REGULATOR_VOLTAGE, \
	66	.id = MC13783_ ## prefix ## _ ## _name, \
	67	.owner = THIS_MODULE, \
	68	}, \
	69	.reg = MC13783_REG_ ## _reg, \
	70	.enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
	71	}
	72
	73	#define MC13783_DEFINE_SW(_name, _reg) MC13783_DEFINE(SW, _name, _reg)
	74	#define MC13783_DEFINE_REGU(_name, _reg) MC13783_DEFINE(REGU, _name, _reg)
	75
295c08bc	76	static struct mc13783_regulator mc13783_regulators[] = {
a10099bc UKK	77	MC13783_DEFINE_SW(SW3, SWITCHERS5),
	78	MC13783_DEFINE_SW(PLL, SWITCHERS4),
	79
	80	MC13783_DEFINE_REGU(VAUDIO, REGULATORMODE0),
	81	MC13783_DEFINE_REGU(VIOHI, REGULATORMODE0),
	82	MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0),
	83	MC13783_DEFINE_REGU(VDIG, REGULATORMODE0),
	84	MC13783_DEFINE_REGU(VGEN, REGULATORMODE0),
	85	MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0),
	86	MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0),
	87	MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0),
	88	MC13783_DEFINE_REGU(VSIM, REGULATORMODE1),
	89	MC13783_DEFINE_REGU(VESIM, REGULATORMODE1),
	90	MC13783_DEFINE_REGU(VCAM, REGULATORMODE1),
	91	MC13783_DEFINE_REGU(VRFBG, REGULATORMODE1),
	92	MC13783_DEFINE_REGU(VVIB, REGULATORMODE1),
	93	MC13783_DEFINE_REGU(VRF1, REGULATORMODE1),
	94	MC13783_DEFINE_REGU(VRF2, REGULATORMODE1),
	95	MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1),
	96	MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1),
	97	MC13783_DEFINE_REGU(GPO1, POWERMISC),
	98	MC13783_DEFINE_REGU(GPO2, POWERMISC),
	99	MC13783_DEFINE_REGU(GPO3, POWERMISC),
	100	MC13783_DEFINE_REGU(GPO4, POWERMISC),
295c08bc SH	101	};
295c08bc SH	102
a10099bc	103	struct mc13783_regulator_priv {
295c08bc	104	struct mc13783 *mc13783;
a10099bc	105	struct regulator_dev *regulators[];
295c08bc SH	106	};
295c08bc SH	107
a10099bc	108	static int mc13783_regulator_enable(struct regulator_dev *rdev)
295c08bc	109	{
a10099bc	110	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
295c08bc	111	int id = rdev_get_id(rdev);
a10099bc	112	int ret;
295c08bc SH	113
	114	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
	115
a10099bc UKK	116	mc13783_lock(priv->mc13783);
a10099bc UKK	117	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
295c08bc SH	118	mc13783_regulators[id].enable_bit,
295c08bc SH	119	mc13783_regulators[id].enable_bit);
a10099bc UKK	120	mc13783_unlock(priv->mc13783);
	121
	122	return ret;
295c08bc SH	123	}
295c08bc SH	124
a10099bc	125	static int mc13783_regulator_disable(struct regulator_dev *rdev)
295c08bc	126	{
a10099bc	127	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
295c08bc	128	int id = rdev_get_id(rdev);
a10099bc	129	int ret;
295c08bc SH	130
	131	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
	132
a10099bc UKK	133	mc13783_lock(priv->mc13783);
a10099bc UKK	134	ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
295c08bc	135	mc13783_regulators[id].enable_bit, 0);
a10099bc UKK	136	mc13783_unlock(priv->mc13783);
	137
	138	return ret;
295c08bc SH	139	}
295c08bc SH	140
a10099bc	141	static int mc13783_regulator_is_enabled(struct regulator_dev *rdev)
295c08bc	142	{
a10099bc	143	struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
295c08bc SH	144	int ret, id = rdev_get_id(rdev);
	145	unsigned int val;
	146
a10099bc	147	mc13783_lock(priv->mc13783);
295c08bc	148	ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
a10099bc UKK	149	mc13783_unlock(priv->mc13783);
a10099bc UKK	150
295c08bc SH	151	if (ret)
	152	return ret;
	153
	154	return (val & mc13783_regulators[id].enable_bit) != 0;
	155	}
	156
	157	static struct regulator_ops mc13783_regulator_ops = {
a10099bc UKK	158	.enable = mc13783_regulator_enable,
	159	.disable = mc13783_regulator_disable,
	160	.is_enabled = mc13783_regulator_is_enabled,
295c08bc SH	161	};
	162
	163	static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
	164	{
a10099bc	165	struct mc13783_regulator_priv *priv;
295c08bc	166	struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
a10099bc UKK	167	struct mc13783_regulator_platform_data *pdata =
a10099bc UKK	168	dev_get_platdata(&pdev->dev);
295c08bc SH	169	struct mc13783_regulator_init_data *init_data;
	170	int i, ret;
	171
	172	dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);
	173
a10099bc UKK	174	priv = kzalloc(sizeof(*priv) +
a10099bc UKK	175	pdata->num_regulators * sizeof(priv->regulators[0]),
295c08bc SH	176	GFP_KERNEL);
	177	if (!priv)
	178	return -ENOMEM;
	179
	180	priv->mc13783 = mc13783;
	181
a10099bc UKK	182	for (i = 0; i < pdata->num_regulators; i++) {
a10099bc UKK	183	init_data = &pdata->regulators[i];
295c08bc SH	184	priv->regulators[i] = regulator_register(
	185	&mc13783_regulators[init_data->id].desc,
	186	&pdev->dev, init_data->init_data, priv);
	187
	188	if (IS_ERR(priv->regulators[i])) {
	189	dev_err(&pdev->dev, "failed to register regulator %s\n",
	190	mc13783_regulators[i].desc.name);
	191	ret = PTR_ERR(priv->regulators[i]);
	192	goto err;
	193	}
	194	}
	195
	196	platform_set_drvdata(pdev, priv);
	197
	198	return 0;
	199	err:
	200	while (--i >= 0)
	201	regulator_unregister(priv->regulators[i]);
	202
	203	kfree(priv);
	204
	205	return ret;
	206	}
	207
	208	static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
	209	{
a10099bc UKK	210	struct mc13783_regulator_priv *priv = platform_get_drvdata(pdev);
	211	struct mc13783_regulator_platform_data *pdata =
	212	dev_get_platdata(&pdev->dev);
295c08bc SH	213	int i;
295c08bc SH	214
a10099bc	215	for (i = 0; i < pdata->num_regulators; i++)
295c08bc SH	216	regulator_unregister(priv->regulators[i]);
	217
	218	return 0;
	219	}
	220
	221	static struct platform_driver mc13783_regulator_driver = {
	222	.driver = {
	223	.name = "mc13783-regulator",
	224	.owner = THIS_MODULE,
	225	},
	226	.remove = __devexit_p(mc13783_regulator_remove),
735eb93a	227	.probe = mc13783_regulator_probe,
295c08bc SH	228	};
	229
	230	static int __init mc13783_regulator_init(void)
	231	{
735eb93a	232	return platform_driver_register(&mc13783_regulator_driver);
295c08bc SH	233	}
	234	subsys_initcall(mc13783_regulator_init);
	235
	236	static void __exit mc13783_regulator_exit(void)
	237	{
	238	platform_driver_unregister(&mc13783_regulator_driver);
	239	}
	240	module_exit(mc13783_regulator_exit);
	241
a10099bc	242	MODULE_LICENSE("GPL v2");
295c08bc SH	243	MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
	244	MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
	245	MODULE_ALIAS("platform:mc13783-regulator");