[GitHub/mt8127/android_kernel_alcatel_ttab.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,				\
		.enable_reg = PCF50633_REG_##_id##OUT + 1,	\
		.enable_mask = PCF50633_REGULATOR_ON,		\
	}

static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
	[PCF50633_REGULATOR_AUTO]	= PCF50633_REG_AUTOOUT,
	[PCF50633_REGULATOR_DOWN1]	= PCF50633_REG_DOWN1OUT,
	[PCF50633_REGULATOR_DOWN2]	= PCF50633_REG_DOWN2OUT,
	[PCF50633_REGULATOR_MEMLDO]	= PCF50633_REG_MEMLDOOUT,
	[PCF50633_REGULATOR_LDO1]	= PCF50633_REG_LDO1OUT,
	[PCF50633_REGULATOR_LDO2]	= PCF50633_REG_LDO2OUT,
	[PCF50633_REGULATOR_LDO3]	= PCF50633_REG_LDO3OUT,
	[PCF50633_REGULATOR_LDO4]	= PCF50633_REG_LDO4OUT,
	[PCF50633_REGULATOR_LDO5]	= PCF50633_REG_LDO5OUT,
	[PCF50633_REGULATOR_LDO6]	= PCF50633_REG_LDO6OUT,
	[PCF50633_REGULATOR_HCLDO]	= PCF50633_REG_HCLDOOUT,
};

/* 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 = pcf50633_regulator_registers[regulator_id];

	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_get_voltage_sel(struct regulator_dev *rdev)
{
	struct pcf50633 *pcf;
	int regulator_id;
	u8 regnr;

	pcf = rdev_get_drvdata(rdev);

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

	regnr = pcf50633_regulator_registers[regulator_id];

	return pcf50633_reg_read(pcf, regnr);
}

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 = pcf50633_regulator_get_voltage_sel,
	.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, \
	35	.enable_reg = PCF50633_REG_##_id##OUT + 1, \
	36	.enable_mask = PCF50633_REGULATOR_ON, \
5ec271e7 BR	37	}
	38
	39	static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
	40	[PCF50633_REGULATOR_AUTO] = PCF50633_REG_AUTOOUT,
	41	[PCF50633_REGULATOR_DOWN1] = PCF50633_REG_DOWN1OUT,
	42	[PCF50633_REGULATOR_DOWN2] = PCF50633_REG_DOWN2OUT,
	43	[PCF50633_REGULATOR_MEMLDO] = PCF50633_REG_MEMLDOOUT,
	44	[PCF50633_REGULATOR_LDO1] = PCF50633_REG_LDO1OUT,
	45	[PCF50633_REGULATOR_LDO2] = PCF50633_REG_LDO2OUT,
	46	[PCF50633_REGULATOR_LDO3] = PCF50633_REG_LDO3OUT,
	47	[PCF50633_REGULATOR_LDO4] = PCF50633_REG_LDO4OUT,
	48	[PCF50633_REGULATOR_LDO5] = PCF50633_REG_LDO5OUT,
	49	[PCF50633_REGULATOR_LDO6] = PCF50633_REG_LDO6OUT,
	50	[PCF50633_REGULATOR_HCLDO] = PCF50633_REG_HCLDOOUT,
	51	};
	52
	53	/* Bits from voltage value */
	54	static u8 auto_voltage_bits(unsigned int millivolts)
	55	{
	56	if (millivolts < 1800)
022dcdf0	57	return 0x2f;
5ec271e7 BR	58	if (millivolts > 3800)
	59	return 0xff;
	60
	61	millivolts -= 625;
	62
	63	return millivolts / 25;
	64	}
	65
	66	static u8 down_voltage_bits(unsigned int millivolts)
	67	{
	68	if (millivolts < 625)
	69	return 0;
	70	else if (millivolts > 3000)
	71	return 0xff;
	72
	73	millivolts -= 625;
	74
	75	return millivolts / 25;
	76	}
	77
	78	static u8 ldo_voltage_bits(unsigned int millivolts)
	79	{
	80	if (millivolts < 900)
	81	return 0;
	82	else if (millivolts > 3600)
	83	return 0x1f;
	84
	85	millivolts -= 900;
	86	return millivolts / 100;
	87	}
	88
	89	/* Obtain voltage value from bits */
	90	static unsigned int auto_voltage_value(u8 bits)
	91	{
022dcdf0 AL	92	/* AUTOOUT: 00000000 to 00101110 are reserved.
	93	* Return 0 for bits in reserved range, which means this selector code
	94	* can't be used on this system */
5ec271e7 BR	95	if (bits < 0x2f)
	96	return 0;
	97
	98	return 625 + (bits * 25);
	99	}
	100
	101
	102	static unsigned int down_voltage_value(u8 bits)
	103	{
	104	return 625 + (bits * 25);
	105	}
	106
	107
	108	static unsigned int ldo_voltage_value(u8 bits)
	109	{
	110	bits &= 0x1f;
	111
	112	return 900 + (bits * 100);
	113	}
	114
	115	static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev,
3a93f2a9 MB	116	int min_uV, int max_uV,
3a93f2a9 MB	117	unsigned *selector)
5ec271e7 BR	118	{
	119	struct pcf50633 *pcf;
	120	int regulator_id, millivolts;
	121	u8 volt_bits, regnr;
	122
	123	pcf = rdev_get_drvdata(rdev);
	124
	125	regulator_id = rdev_get_id(rdev);
	126	if (regulator_id >= PCF50633_NUM_REGULATORS)
	127	return -EINVAL;
	128
	129	millivolts = min_uV / 1000;
	130
	131	regnr = pcf50633_regulator_registers[regulator_id];
	132
	133	switch (regulator_id) {
	134	case PCF50633_REGULATOR_AUTO:
	135	volt_bits = auto_voltage_bits(millivolts);
	136	break;
	137	case PCF50633_REGULATOR_DOWN1:
	138	volt_bits = down_voltage_bits(millivolts);
	139	break;
	140	case PCF50633_REGULATOR_DOWN2:
	141	volt_bits = down_voltage_bits(millivolts);
	142	break;
	143	case PCF50633_REGULATOR_LDO1:
	144	case PCF50633_REGULATOR_LDO2:
	145	case PCF50633_REGULATOR_LDO3:
	146	case PCF50633_REGULATOR_LDO4:
	147	case PCF50633_REGULATOR_LDO5:
	148	case PCF50633_REGULATOR_LDO6:
	149	case PCF50633_REGULATOR_HCLDO:
ba51c6c0	150	case PCF50633_REGULATOR_MEMLDO:
5ec271e7 BR	151	volt_bits = ldo_voltage_bits(millivolts);
	152	break;
	153	default:
	154	return -EINVAL;
	155	}
	156
3a93f2a9 MB	157	*selector = volt_bits;
3a93f2a9 MB	158
5ec271e7 BR	159	return pcf50633_reg_write(pcf, regnr, volt_bits);
	160	}
	161
8300d2fd	162	static int pcf50633_regulator_get_voltage_sel(struct regulator_dev *rdev)
a6576cff	163	{
8300d2fd AL	164	struct pcf50633 *pcf;
	165	int regulator_id;
	166	u8 regnr;
	167
	168	pcf = rdev_get_drvdata(rdev);
	169
	170	regulator_id = rdev_get_id(rdev);
	171	if (regulator_id >= PCF50633_NUM_REGULATORS)
	172	return -EINVAL;
	173
	174	regnr = pcf50633_regulator_registers[regulator_id];
	175
	176	return pcf50633_reg_read(pcf, regnr);
	177	}
	178
	179	static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
	180	unsigned int index)
	181	{
	182	int regulator_id = rdev_get_id(rdev);
	183
a6576cff LPC	184	int millivolts;
a6576cff LPC	185
8300d2fd	186	switch (regulator_id) {
a6576cff	187	case PCF50633_REGULATOR_AUTO:
8300d2fd	188	millivolts = auto_voltage_value(index);
a6576cff LPC	189	break;
a6576cff LPC	190	case PCF50633_REGULATOR_DOWN1:
8300d2fd	191	millivolts = down_voltage_value(index);
a6576cff LPC	192	break;
a6576cff LPC	193	case PCF50633_REGULATOR_DOWN2:
8300d2fd	194	millivolts = down_voltage_value(index);
a6576cff LPC	195	break;
	196	case PCF50633_REGULATOR_LDO1:
	197	case PCF50633_REGULATOR_LDO2:
	198	case PCF50633_REGULATOR_LDO3:
	199	case PCF50633_REGULATOR_LDO4:
	200	case PCF50633_REGULATOR_LDO5:
	201	case PCF50633_REGULATOR_LDO6:
	202	case PCF50633_REGULATOR_HCLDO:
ba51c6c0	203	case PCF50633_REGULATOR_MEMLDO:
8300d2fd	204	millivolts = ldo_voltage_value(index);
a6576cff LPC	205	break;
	206	default:
	207	return -EINVAL;
	208	}
	209
	210	return millivolts * 1000;
	211	}
	212
5ec271e7 BR	213	static struct regulator_ops pcf50633_regulator_ops = {
5ec271e7 BR	214	.set_voltage = pcf50633_regulator_set_voltage,
8300d2fd	215	.get_voltage_sel = pcf50633_regulator_get_voltage_sel,
a6576cff	216	.list_voltage = pcf50633_regulator_list_voltage,
11bb88ec AL	217	.enable = regulator_enable_regmap,
	218	.disable = regulator_disable_regmap,
	219	.is_enabled = regulator_is_enabled_regmap,
5ec271e7 BR	220	};
5ec271e7 BR	221
2ac2d7d8	222	static const struct regulator_desc regulators[] = {
11bb88ec AL	223	[PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", AUTO, 128),
	224	[PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", DOWN1, 96),
	225	[PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", DOWN2, 96),
	226	[PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", LDO1, 28),
	227	[PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", LDO2, 28),
	228	[PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", LDO3, 28),
	229	[PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", LDO4, 28),
	230	[PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", LDO5, 28),
	231	[PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", LDO6, 28),
	232	[PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", HCLDO, 28),
	233	[PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", MEMLDO, 28),
5ec271e7 BR	234	};
	235
	236	static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
	237	{
	238	struct regulator_dev *rdev;
	239	struct pcf50633 *pcf;
c172708d	240	struct regulator_config config = { };
5ec271e7 BR	241
5ec271e7 BR	242	/* Already set by core driver */
98c2e490	243	pcf = dev_to_pcf50633(pdev->dev.parent);
5ec271e7	244
c172708d MB	245	config.dev = &pdev->dev;
	246	config.init_data = pdev->dev.platform_data;
	247	config.driver_data = pcf;
11bb88ec	248	config.regmap = pcf->regmap;
c172708d MB	249
c172708d MB	250	rdev = regulator_register(&regulators[pdev->id], &config);
5ec271e7 BR	251	if (IS_ERR(rdev))
	252	return PTR_ERR(rdev);
	253
98c2e490 LPC	254	platform_set_drvdata(pdev, rdev);
98c2e490 LPC	255
5ec271e7 BR	256	if (pcf->pdata->regulator_registered)
	257	pcf->pdata->regulator_registered(pcf, pdev->id);
	258
	259	return 0;
	260	}
	261
	262	static int __devexit pcf50633_regulator_remove(struct platform_device *pdev)
	263	{
	264	struct regulator_dev *rdev = platform_get_drvdata(pdev);
	265
98c2e490	266	platform_set_drvdata(pdev, NULL);
5ec271e7 BR	267	regulator_unregister(rdev);
	268
	269	return 0;
	270	}
	271
	272	static struct platform_driver pcf50633_regulator_driver = {
	273	.driver = {
	274	.name = "pcf50633-regltr",
	275	},
	276	.probe = pcf50633_regulator_probe,
	277	.remove = __devexit_p(pcf50633_regulator_remove),
	278	};
	279
	280	static int __init pcf50633_regulator_init(void)
	281	{
	282	return platform_driver_register(&pcf50633_regulator_driver);
	283	}
5a1b22be	284	subsys_initcall(pcf50633_regulator_init);
5ec271e7 BR	285
	286	static void __exit pcf50633_regulator_exit(void)
	287	{
	288	platform_driver_unregister(&pcf50633_regulator_driver);
	289	}
	290	module_exit(pcf50633_regulator_exit);
	291
	292	MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
	293	MODULE_DESCRIPTION("PCF50633 regulator driver");
	294	MODULE_LICENSE("GPL");
	295	MODULE_ALIAS("platform:pcf50633-regulator");