[deliverable/linux.git] / drivers / regulator / pcf50633-regulator.c

/* NXP PCF50633 PMIC Driver
 *
 * (C) 2006-2008 by Openmoko, Inc.
 * Author: Balaji Rao <balajirrao@openmoko.org>
 * All rights reserved.
 *
 * Broken down from monstrous PCF50633 driver mainly by
 * Harald Welte and Andy Green and Werner Almesberger
 *
 *  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.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/platform_device.h>

#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/pmic.h>

#define PCF50633_REGULATOR(_name, _id, _n)			\
	{							\
		.name = _name,					\
		.id = PCF50633_REGULATOR_##_id,			\
		.ops = &pcf50633_regulator_ops,			\
		.n_voltages = _n,				\
		.type = REGULATOR_VOLTAGE,			\
		.owner = THIS_MODULE,				\
		.vsel_reg = PCF50633_REG_##_id##OUT,		\
		.vsel_mask = 0xff,				\
		.enable_reg = PCF50633_REG_##_id##OUT + 1,	\
		.enable_mask = PCF50633_REGULATOR_ON,		\
	}

/* Bits from voltage value */
static u8 auto_voltage_bits(unsigned int millivolts)
{
	if (millivolts < 1800)
		return 0x2f;
	if (millivolts > 3800)
		return 0xff;

	millivolts -= 625;

	return millivolts / 25;
}

static u8 down_voltage_bits(unsigned int millivolts)
{
	if (millivolts < 625)
		return 0;
	else if (millivolts > 3000)
		return 0xff;

	millivolts -= 625;

	return millivolts / 25;
}

static u8 ldo_voltage_bits(unsigned int millivolts)
{
	if (millivolts < 900)
		return 0;
	else if (millivolts > 3600)
		return 0x1f;

	millivolts -= 900;
	return millivolts / 100;
}

/* Obtain voltage value from bits */
static unsigned int auto_voltage_value(u8 bits)
{
	/* AUTOOUT: 00000000 to 00101110 are reserved.
	 * Return 0 for bits in reserved range, which means this selector code
	 * can't be used on this system */
	if (bits < 0x2f)
		return 0;

	return 625 + (bits * 25);
}


static unsigned int down_voltage_value(u8 bits)
{
	return 625 + (bits * 25);
}


static unsigned int ldo_voltage_value(u8 bits)
{
	bits &= 0x1f;

	return 900 + (bits * 100);
}

static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev,
					  int min_uV, int max_uV,
					  unsigned *selector)
{
	struct pcf50633 *pcf;
	int regulator_id, millivolts;
	u8 volt_bits, regnr;

	pcf = rdev_get_drvdata(rdev);

	regulator_id = rdev_get_id(rdev);
	if (regulator_id >= PCF50633_NUM_REGULATORS)
		return -EINVAL;

	millivolts = min_uV / 1000;

	regnr = rdev->desc->vsel_reg;

	switch (regulator_id) {
	case PCF50633_REGULATOR_AUTO:
		volt_bits = auto_voltage_bits(millivolts);
		break;
	case PCF50633_REGULATOR_DOWN1:
		volt_bits = down_voltage_bits(millivolts);
		break;
	case PCF50633_REGULATOR_DOWN2:
		volt_bits = down_voltage_bits(millivolts);
		break;
	case PCF50633_REGULATOR_LDO1:
	case PCF50633_REGULATOR_LDO2:
	case PCF50633_REGULATOR_LDO3:
	case PCF50633_REGULATOR_LDO4:
	case PCF50633_REGULATOR_LDO5:
	case PCF50633_REGULATOR_LDO6:
	case PCF50633_REGULATOR_HCLDO:
	case PCF50633_REGULATOR_MEMLDO:
		volt_bits = ldo_voltage_bits(millivolts);
		break;
	default:
		return -EINVAL;
	}

	*selector = volt_bits;

	return pcf50633_reg_write(pcf, regnr, volt_bits);
}

static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
						unsigned int index)
{
	int regulator_id = rdev_get_id(rdev);

	int millivolts;

	switch (regulator_id) {
	case PCF50633_REGULATOR_AUTO:
		millivolts = auto_voltage_value(index);
		break;
	case PCF50633_REGULATOR_DOWN1:
		millivolts = down_voltage_value(index);
		break;
	case PCF50633_REGULATOR_DOWN2:
		millivolts = down_voltage_value(index);
		break;
	case PCF50633_REGULATOR_LDO1:
	case PCF50633_REGULATOR_LDO2:
	case PCF50633_REGULATOR_LDO3:
	case PCF50633_REGULATOR_LDO4:
	case PCF50633_REGULATOR_LDO5:
	case PCF50633_REGULATOR_LDO6:
	case PCF50633_REGULATOR_HCLDO:
	case PCF50633_REGULATOR_MEMLDO:
		millivolts = ldo_voltage_value(index);
		break;
	default:
		return -EINVAL;
	}

	return millivolts * 1000;
}

static struct regulator_ops pcf50633_regulator_ops = {
	.set_voltage = pcf50633_regulator_set_voltage,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.list_voltage = pcf50633_regulator_list_voltage,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
};

static const struct regulator_desc regulators[] = {
	[PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", AUTO, 128),
	[PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", DOWN1, 96),
	[PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", DOWN2, 96),
	[PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", LDO1, 28),
	[PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", LDO2, 28),
	[PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", LDO3, 28),
	[PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", LDO4, 28),
	[PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", LDO5, 28),
	[PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", LDO6, 28),
	[PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", HCLDO, 28),
	[PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", MEMLDO, 28),
};

static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
{
	struct regulator_dev *rdev;
	struct pcf50633 *pcf;
	struct regulator_config config = { };

	/* Already set by core driver */
	pcf = dev_to_pcf50633(pdev->dev.parent);

	config.dev = &pdev->dev;
	config.init_data = pdev->dev.platform_data;
	config.driver_data = pcf;
	config.regmap = pcf->regmap;

	rdev = regulator_register(&regulators[pdev->id], &config);
	if (IS_ERR(rdev))
		return PTR_ERR(rdev);

	platform_set_drvdata(pdev, rdev);

	if (pcf->pdata->regulator_registered)
		pcf->pdata->regulator_registered(pcf, pdev->id);

	return 0;
}

static int __devexit pcf50633_regulator_remove(struct platform_device *pdev)
{
	struct regulator_dev *rdev = platform_get_drvdata(pdev);

	platform_set_drvdata(pdev, NULL);
	regulator_unregister(rdev);

	return 0;
}

static struct platform_driver pcf50633_regulator_driver = {
	.driver = {
		.name = "pcf50633-regltr",
	},
	.probe = pcf50633_regulator_probe,
	.remove = __devexit_p(pcf50633_regulator_remove),
};

static int __init pcf50633_regulator_init(void)
{
	return platform_driver_register(&pcf50633_regulator_driver);
}
subsys_initcall(pcf50633_regulator_init);

static void __exit pcf50633_regulator_exit(void)
{
	platform_driver_unregister(&pcf50633_regulator_driver);
}
module_exit(pcf50633_regulator_exit);

MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_DESCRIPTION("PCF50633 regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pcf50633-regulator");
Commit	Line	Data
5ec271e7 BR	1	/* NXP PCF50633 PMIC Driver
	2	*
	3	* (C) 2006-2008 by Openmoko, Inc.
	4	* Author: Balaji Rao <balajirrao@openmoko.org>
	5	* All rights reserved.
	6	*
	7	* Broken down from monstrous PCF50633 driver mainly by
	8	* Harald Welte and Andy Green and Werner Almesberger
	9	*
	10	* This program is free software; you can redistribute it and/or modify it
	11	* under the terms of the GNU General Public License as published by the
	12	* Free Software Foundation; either version 2 of the License, or (at your
	13	* option) any later version.
	14	*
	15	*/
	16
	17	#include <linux/kernel.h>
	18	#include <linux/module.h>
	19	#include <linux/init.h>
	20	#include <linux/device.h>
	21	#include <linux/err.h>
	22	#include <linux/platform_device.h>
	23
	24	#include <linux/mfd/pcf50633/core.h>
	25	#include <linux/mfd/pcf50633/pmic.h>
	26
11bb88ec AL	27	#define PCF50633_REGULATOR(_name, _id, _n) \
	28	{ \
	29	.name = _name, \
	30	.id = PCF50633_REGULATOR_##_id, \
	31	.ops = &pcf50633_regulator_ops, \
	32	.n_voltages = _n, \
	33	.type = REGULATOR_VOLTAGE, \
	34	.owner = THIS_MODULE, \
98667b43 AL	35	.vsel_reg = PCF50633_REG_##_id##OUT, \
98667b43 AL	36	.vsel_mask = 0xff, \
11bb88ec AL	37	.enable_reg = PCF50633_REG_##_id##OUT + 1, \
11bb88ec AL	38	.enable_mask = PCF50633_REGULATOR_ON, \
5ec271e7 BR	39	}
5ec271e7 BR	40
5ec271e7 BR	41	/* Bits from voltage value */
	42	static u8 auto_voltage_bits(unsigned int millivolts)
	43	{
	44	if (millivolts < 1800)
022dcdf0	45	return 0x2f;
5ec271e7 BR	46	if (millivolts > 3800)
	47	return 0xff;
	48
	49	millivolts -= 625;
	50
	51	return millivolts / 25;
	52	}
	53
	54	static u8 down_voltage_bits(unsigned int millivolts)
	55	{
	56	if (millivolts < 625)
	57	return 0;
	58	else if (millivolts > 3000)
	59	return 0xff;
	60
	61	millivolts -= 625;
	62
	63	return millivolts / 25;
	64	}
	65
	66	static u8 ldo_voltage_bits(unsigned int millivolts)
	67	{
	68	if (millivolts < 900)
	69	return 0;
	70	else if (millivolts > 3600)
	71	return 0x1f;
	72
	73	millivolts -= 900;
	74	return millivolts / 100;
	75	}
	76
	77	/* Obtain voltage value from bits */
	78	static unsigned int auto_voltage_value(u8 bits)
	79	{
022dcdf0 AL	80	/* AUTOOUT: 00000000 to 00101110 are reserved.
	81	* Return 0 for bits in reserved range, which means this selector code
	82	* can't be used on this system */
5ec271e7 BR	83	if (bits < 0x2f)
	84	return 0;
	85
	86	return 625 + (bits * 25);
	87	}
	88
	89
	90	static unsigned int down_voltage_value(u8 bits)
	91	{
	92	return 625 + (bits * 25);
	93	}
	94
	95
	96	static unsigned int ldo_voltage_value(u8 bits)
	97	{
	98	bits &= 0x1f;
	99
	100	return 900 + (bits * 100);
	101	}
	102
	103	static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev,
3a93f2a9 MB	104	int min_uV, int max_uV,
3a93f2a9 MB	105	unsigned *selector)
5ec271e7 BR	106	{
	107	struct pcf50633 *pcf;
	108	int regulator_id, millivolts;
	109	u8 volt_bits, regnr;
	110
	111	pcf = rdev_get_drvdata(rdev);
	112
	113	regulator_id = rdev_get_id(rdev);
	114	if (regulator_id >= PCF50633_NUM_REGULATORS)
	115	return -EINVAL;
	116
	117	millivolts = min_uV / 1000;
	118
98667b43	119	regnr = rdev->desc->vsel_reg;
5ec271e7 BR	120
	121	switch (regulator_id) {
	122	case PCF50633_REGULATOR_AUTO:
	123	volt_bits = auto_voltage_bits(millivolts);
	124	break;
	125	case PCF50633_REGULATOR_DOWN1:
	126	volt_bits = down_voltage_bits(millivolts);
	127	break;
	128	case PCF50633_REGULATOR_DOWN2:
	129	volt_bits = down_voltage_bits(millivolts);
	130	break;
	131	case PCF50633_REGULATOR_LDO1:
	132	case PCF50633_REGULATOR_LDO2:
	133	case PCF50633_REGULATOR_LDO3:
	134	case PCF50633_REGULATOR_LDO4:
	135	case PCF50633_REGULATOR_LDO5:
	136	case PCF50633_REGULATOR_LDO6:
	137	case PCF50633_REGULATOR_HCLDO:
ba51c6c0	138	case PCF50633_REGULATOR_MEMLDO:
5ec271e7 BR	139	volt_bits = ldo_voltage_bits(millivolts);
	140	break;
	141	default:
	142	return -EINVAL;
	143	}
	144
3a93f2a9 MB	145	*selector = volt_bits;
3a93f2a9 MB	146
5ec271e7 BR	147	return pcf50633_reg_write(pcf, regnr, volt_bits);
	148	}
	149
8300d2fd AL	150	static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
	151	unsigned int index)
	152	{
	153	int regulator_id = rdev_get_id(rdev);
	154
a6576cff LPC	155	int millivolts;
a6576cff LPC	156
8300d2fd	157	switch (regulator_id) {
a6576cff	158	case PCF50633_REGULATOR_AUTO:
8300d2fd	159	millivolts = auto_voltage_value(index);
a6576cff LPC	160	break;
a6576cff LPC	161	case PCF50633_REGULATOR_DOWN1:
8300d2fd	162	millivolts = down_voltage_value(index);
a6576cff LPC	163	break;
a6576cff LPC	164	case PCF50633_REGULATOR_DOWN2:
8300d2fd	165	millivolts = down_voltage_value(index);
a6576cff LPC	166	break;
	167	case PCF50633_REGULATOR_LDO1:
	168	case PCF50633_REGULATOR_LDO2:
	169	case PCF50633_REGULATOR_LDO3:
	170	case PCF50633_REGULATOR_LDO4:
	171	case PCF50633_REGULATOR_LDO5:
	172	case PCF50633_REGULATOR_LDO6:
	173	case PCF50633_REGULATOR_HCLDO:
ba51c6c0	174	case PCF50633_REGULATOR_MEMLDO:
8300d2fd	175	millivolts = ldo_voltage_value(index);
a6576cff LPC	176	break;
	177	default:
	178	return -EINVAL;
	179	}
	180
	181	return millivolts * 1000;
	182	}
	183
5ec271e7 BR	184	static struct regulator_ops pcf50633_regulator_ops = {
5ec271e7 BR	185	.set_voltage = pcf50633_regulator_set_voltage,
98667b43	186	.get_voltage_sel = regulator_get_voltage_sel_regmap,
a6576cff	187	.list_voltage = pcf50633_regulator_list_voltage,
11bb88ec AL	188	.enable = regulator_enable_regmap,
	189	.disable = regulator_disable_regmap,
	190	.is_enabled = regulator_is_enabled_regmap,
5ec271e7 BR	191	};
5ec271e7 BR	192
2ac2d7d8	193	static const struct regulator_desc regulators[] = {
11bb88ec AL	194	[PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", AUTO, 128),
	195	[PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", DOWN1, 96),
	196	[PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", DOWN2, 96),
	197	[PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", LDO1, 28),
	198	[PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", LDO2, 28),
	199	[PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", LDO3, 28),
	200	[PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", LDO4, 28),
	201	[PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", LDO5, 28),
	202	[PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", LDO6, 28),
	203	[PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", HCLDO, 28),
	204	[PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", MEMLDO, 28),
5ec271e7 BR	205	};
	206
	207	static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
	208	{
	209	struct regulator_dev *rdev;
	210	struct pcf50633 *pcf;
c172708d	211	struct regulator_config config = { };
5ec271e7 BR	212
5ec271e7 BR	213	/* Already set by core driver */
98c2e490	214	pcf = dev_to_pcf50633(pdev->dev.parent);
5ec271e7	215
c172708d MB	216	config.dev = &pdev->dev;
	217	config.init_data = pdev->dev.platform_data;
	218	config.driver_data = pcf;
11bb88ec	219	config.regmap = pcf->regmap;
c172708d MB	220
c172708d MB	221	rdev = regulator_register(&regulators[pdev->id], &config);
5ec271e7 BR	222	if (IS_ERR(rdev))
	223	return PTR_ERR(rdev);
	224
98c2e490 LPC	225	platform_set_drvdata(pdev, rdev);
98c2e490 LPC	226
5ec271e7 BR	227	if (pcf->pdata->regulator_registered)
	228	pcf->pdata->regulator_registered(pcf, pdev->id);
	229
	230	return 0;
	231	}
	232
	233	static int __devexit pcf50633_regulator_remove(struct platform_device *pdev)
	234	{
	235	struct regulator_dev *rdev = platform_get_drvdata(pdev);
	236
98c2e490	237	platform_set_drvdata(pdev, NULL);
5ec271e7 BR	238	regulator_unregister(rdev);
	239
	240	return 0;
	241	}
	242
	243	static struct platform_driver pcf50633_regulator_driver = {
	244	.driver = {
	245	.name = "pcf50633-regltr",
	246	},
	247	.probe = pcf50633_regulator_probe,
	248	.remove = __devexit_p(pcf50633_regulator_remove),
	249	};
	250
	251	static int __init pcf50633_regulator_init(void)
	252	{
	253	return platform_driver_register(&pcf50633_regulator_driver);
	254	}
5a1b22be	255	subsys_initcall(pcf50633_regulator_init);
5ec271e7 BR	256
	257	static void __exit pcf50633_regulator_exit(void)
	258	{
	259	platform_driver_unregister(&pcf50633_regulator_driver);
	260	}
	261	module_exit(pcf50633_regulator_exit);
	262
	263	MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
	264	MODULE_DESCRIPTION("PCF50633 regulator driver");
	265	MODULE_LICENSE("GPL");
	266	MODULE_ALIAS("platform:pcf50633-regulator");