[net-next-2.6.git] / drivers / regulator / twl4030-regulator.c

/*
 * twl4030-regulator.c -- support regulators in twl4030 family chips
 *
 * Copyright (C) 2008 David Brownell
 *
 * 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/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/i2c/twl4030.h>


/*
 * The TWL4030/TW5030/TPS659x0 family chips include power management, a
 * USB OTG transceiver, an RTC, ADC, PWM, and lots more.  Some versions
 * include an audio codec, battery charger, and more voltage regulators.
 * These chips are often used in OMAP-based systems.
 *
 * This driver implements software-based resource control for various
 * voltage regulators.  This is usually augmented with state machine
 * based control.
 */

struct twlreg_info {
	/* start of regulator's PM_RECEIVER control register bank */
	u8			base;

	/* twl4030 resource ID, for resource control state machine */
	u8			id;

	/* voltage in mV = table[VSEL]; table_len must be a power-of-two */
	u8			table_len;
	const u16		*table;

	/* chip constraints on regulator behavior */
	u16			min_mV;

	/* used by regulator core */
	struct regulator_desc	desc;
};


/* LDO control registers ... offset is from the base of its register bank.
 * The first three registers of all power resource banks help hardware to
 * manage the various resource groups.
 */
#define VREG_GRP		0
#define VREG_TYPE		1
#define VREG_REMAP		2
#define VREG_DEDICATED		3	/* LDO control */


static inline int
twl4030reg_read(struct twlreg_info *info, unsigned offset)
{
	u8 value;
	int status;

	status = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER,
			&value, info->base + offset);
	return (status < 0) ? status : value;
}

static inline int
twl4030reg_write(struct twlreg_info *info, unsigned offset, u8 value)
{
	return twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
			value, info->base + offset);
}

/*----------------------------------------------------------------------*/

/* generic power resource operations, which work on all regulators */

static int twl4030reg_grp(struct regulator_dev *rdev)
{
	return twl4030reg_read(rdev_get_drvdata(rdev), VREG_GRP);
}

/*
 * Enable/disable regulators by joining/leaving the P1 (processor) group.
 * We assume nobody else is updating the DEV_GRP registers.
 */

#define P3_GRP		BIT(7)		/* "peripherals" */
#define P2_GRP		BIT(6)		/* secondary processor, modem, etc */
#define P1_GRP		BIT(5)		/* CPU/Linux */

static int twl4030reg_is_enabled(struct regulator_dev *rdev)
{
	int	state = twl4030reg_grp(rdev);

	if (state < 0)
		return state;

	return (state & P1_GRP) != 0;
}

static int twl4030reg_enable(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			grp;

	grp = twl4030reg_read(info, VREG_GRP);
	if (grp < 0)
		return grp;

	grp |= P1_GRP;
	return twl4030reg_write(info, VREG_GRP, grp);
}

static int twl4030reg_disable(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			grp;

	grp = twl4030reg_read(info, VREG_GRP);
	if (grp < 0)
		return grp;

	grp &= ~P1_GRP;
	return twl4030reg_write(info, VREG_GRP, grp);
}

static int twl4030reg_get_status(struct regulator_dev *rdev)
{
	int	state = twl4030reg_grp(rdev);

	if (state < 0)
		return state;
	state &= 0x0f;

	/* assume state != WARM_RESET; we'd not be running...  */
	if (!state)
		return REGULATOR_STATUS_OFF;
	return (state & BIT(3))
		? REGULATOR_STATUS_NORMAL
		: REGULATOR_STATUS_STANDBY;
}

static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	unsigned		message;
	int			status;

	/* We can only set the mode through state machine commands... */
	switch (mode) {
	case REGULATOR_MODE_NORMAL:
		message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
		break;
	case REGULATOR_MODE_STANDBY:
		message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
		break;
	default:
		return -EINVAL;
	}

	/* Ensure the resource is associated with some group */
	status = twl4030reg_grp(rdev);
	if (status < 0)
		return status;
	if (!(status & (P3_GRP | P2_GRP | P1_GRP)))
		return -EACCES;

	status = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
			message >> 8, 0x15 /* PB_WORD_MSB */ );
	if (status >= 0)
		return status;

	return twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
			message, 0x16 /* PB_WORD_LSB */ );
}

/*----------------------------------------------------------------------*/

/*
 * Support for adjustable-voltage LDOs uses a four bit (or less) voltage
 * select field in its control register.   We use tables indexed by VSEL
 * to record voltages in milliVolts.  (Accuracy is about three percent.)
 *
 * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
 * currently handled by listing two slightly different VAUX2 regulators,
 * only one of which will be configured.
 *
 * VSEL values documented as "TI cannot support these values" are flagged
 * in these tables as UNSUP() values; we normally won't assign them.
 */
#ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
#define UNSUP_MASK	0x0000
#else
#define UNSUP_MASK	0x8000
#endif

#define UNSUP(x)	(UNSUP_MASK | (x))
#define IS_UNSUP(x)	(UNSUP_MASK & (x))
#define LDO_MV(x)	(~UNSUP_MASK & (x))


static const u16 VAUX1_VSEL_table[] = {
	UNSUP(1500), UNSUP(1800), 2500, 2800,
	3000, 3000, 3000, 3000,
};
static const u16 VAUX2_4030_VSEL_table[] = {
	UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
	1500, 1800, UNSUP(1850), 2500,
	UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
};
static const u16 VAUX2_VSEL_table[] = {
	1700, 1700, 1900, 1300,
	1500, 1800, 2000, 2500,
	2100, 2800, 2200, 2300,
	2400, 2400, 2400, 2400,
};
static const u16 VAUX3_VSEL_table[] = {
	1500, 1800, 2500, 2800,
	UNSUP(3000), UNSUP(3000), UNSUP(3000), UNSUP(3000),
};
static const u16 VAUX4_VSEL_table[] = {
	700, 1000, 1200, UNSUP(1300),
	1500, 1800, UNSUP(1850), 2500,
	UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
};
static const u16 VMMC1_VSEL_table[] = {
	1850, 2850, 3000, 3150,
};
static const u16 VMMC2_VSEL_table[] = {
	UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
	UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
	2600, 2800, 2850, 3000,
	3150, 3150, 3150, 3150,
};
static const u16 VPLL1_VSEL_table[] = {
	1000, 1200, 1300, 1800,
	UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
};
static const u16 VPLL2_VSEL_table[] = {
	700, 1000, 1200, 1300,
	UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
	UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
};
static const u16 VSIM_VSEL_table[] = {
	UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
	2800, 3000, 3000, 3000,
};
static const u16 VDAC_VSEL_table[] = {
	1200, 1300, 1800, 1800,
};


static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			mV = info->table[index];

	return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
}

static int
twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			vsel;

	for (vsel = 0; vsel < info->table_len; vsel++) {
		int mV = info->table[vsel];
		int uV;

		if (IS_UNSUP(mV))
			continue;
		uV = LDO_MV(mV) * 1000;

		/* REVISIT for VAUX2, first match may not be best/lowest */

		/* use the first in-range value */
		if (min_uV <= uV && uV <= max_uV)
			return twl4030reg_write(info, VREG_DEDICATED, vsel);
	}

	return -EDOM;
}

static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);
	int			vsel = twl4030reg_read(info, VREG_DEDICATED);

	if (vsel < 0)
		return vsel;

	vsel &= info->table_len - 1;
	return LDO_MV(info->table[vsel]) * 1000;
}

static struct regulator_ops twl4030ldo_ops = {
	.list_voltage	= twl4030ldo_list_voltage,

	.set_voltage	= twl4030ldo_set_voltage,
	.get_voltage	= twl4030ldo_get_voltage,

	.enable		= twl4030reg_enable,
	.disable	= twl4030reg_disable,
	.is_enabled	= twl4030reg_is_enabled,

	.set_mode	= twl4030reg_set_mode,

	.get_status	= twl4030reg_get_status,
};

/*----------------------------------------------------------------------*/

/*
 * Fixed voltage LDOs don't have a VSEL field to update.
 */
static int twl4030fixed_list_voltage(struct regulator_dev *rdev, unsigned index)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);

	return info->min_mV * 1000;
}

static int twl4030fixed_get_voltage(struct regulator_dev *rdev)
{
	struct twlreg_info	*info = rdev_get_drvdata(rdev);

	return info->min_mV * 1000;
}

static struct regulator_ops twl4030fixed_ops = {
	.list_voltage	= twl4030fixed_list_voltage,

	.get_voltage	= twl4030fixed_get_voltage,

	.enable		= twl4030reg_enable,
	.disable	= twl4030reg_disable,
	.is_enabled	= twl4030reg_is_enabled,

	.set_mode	= twl4030reg_set_mode,

	.get_status	= twl4030reg_get_status,
};

/*----------------------------------------------------------------------*/

#define TWL_ADJUSTABLE_LDO(label, offset, num) { \
	.base = offset, \
	.id = num, \
	.table_len = ARRAY_SIZE(label##_VSEL_table), \
	.table = label##_VSEL_table, \
	.desc = { \
		.name = #label, \
		.id = TWL4030_REG_##label, \
		.n_voltages = ARRAY_SIZE(label##_VSEL_table), \
		.ops = &twl4030ldo_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		}, \
	}

#define TWL_FIXED_LDO(label, offset, mVolts, num) { \
	.base = offset, \
	.id = num, \
	.min_mV = mVolts, \
	.desc = { \
		.name = #label, \
		.id = TWL4030_REG_##label, \
		.n_voltages = 1, \
		.ops = &twl4030fixed_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		}, \
	}

/*
 * We list regulators here if systems need some level of
 * software control over them after boot.
 */
static struct twlreg_info twl4030_regs[] = {
	TWL_ADJUSTABLE_LDO(VAUX1, 0x17, 1),
	TWL_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2),
	TWL_ADJUSTABLE_LDO(VAUX2, 0x1b, 2),
	TWL_ADJUSTABLE_LDO(VAUX3, 0x1f, 3),
	TWL_ADJUSTABLE_LDO(VAUX4, 0x23, 4),
	TWL_ADJUSTABLE_LDO(VMMC1, 0x27, 5),
	TWL_ADJUSTABLE_LDO(VMMC2, 0x2b, 6),
	/*
	TWL_ADJUSTABLE_LDO(VPLL1, 0x2f, 7),
	*/
	TWL_ADJUSTABLE_LDO(VPLL2, 0x33, 8),
	TWL_ADJUSTABLE_LDO(VSIM, 0x37, 9),
	TWL_ADJUSTABLE_LDO(VDAC, 0x3b, 10),
	/*
	TWL_ADJUSTABLE_LDO(VINTANA1, 0x3f, 11),
	TWL_ADJUSTABLE_LDO(VINTANA2, 0x43, 12),
	TWL_ADJUSTABLE_LDO(VINTDIG, 0x47, 13),
	TWL_SMPS(VIO, 0x4b, 14),
	TWL_SMPS(VDD1, 0x55, 15),
	TWL_SMPS(VDD2, 0x63, 16),
	 */
	TWL_FIXED_LDO(VUSB1V5, 0x71, 1500, 17),
	TWL_FIXED_LDO(VUSB1V8, 0x74, 1800, 18),
	TWL_FIXED_LDO(VUSB3V1, 0x77, 3100, 19),
	/* VUSBCP is managed *only* by the USB subchip */
};

static int twl4030reg_probe(struct platform_device *pdev)
{
	int				i;
	struct twlreg_info		*info;
	struct regulator_init_data	*initdata;
	struct regulation_constraints	*c;
	struct regulator_dev		*rdev;

	for (i = 0, info = NULL; i < ARRAY_SIZE(twl4030_regs); i++) {
		if (twl4030_regs[i].desc.id != pdev->id)
			continue;
		info = twl4030_regs + i;
		break;
	}
	if (!info)
		return -ENODEV;

	initdata = pdev->dev.platform_data;
	if (!initdata)
		return -EINVAL;

	/* Constrain board-specific capabilities according to what
	 * this driver and the chip itself can actually do.
	 */
	c = &initdata->constraints;
	c->valid_modes_mask &= REGULATOR_MODE_NORMAL | REGULATOR_MODE_STANDBY;
	c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
				| REGULATOR_CHANGE_MODE
				| REGULATOR_CHANGE_STATUS;

	rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
	if (IS_ERR(rdev)) {
		dev_err(&pdev->dev, "can't register %s, %ld\n",
				info->desc.name, PTR_ERR(rdev));
		return PTR_ERR(rdev);
	}
	platform_set_drvdata(pdev, rdev);

	/* NOTE:  many regulators support short-circuit IRQs (presentable
	 * as REGULATOR_OVER_CURRENT notifications?) configured via:
	 *  - SC_CONFIG
	 *  - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
	 *  - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
	 *  - IT_CONFIG
	 */

	return 0;
}

static int __devexit twl4030reg_remove(struct platform_device *pdev)
{
	regulator_unregister(platform_get_drvdata(pdev));
	return 0;
}

MODULE_ALIAS("platform:twl4030_reg");

static struct platform_driver twl4030reg_driver = {
	.probe		= twl4030reg_probe,
	.remove		= __devexit_p(twl4030reg_remove),
	/* NOTE: short name, to work around driver model truncation of
	 * "twl4030_regulator.12" (and friends) to "twl4030_regulator.1".
	 */
	.driver.name	= "twl4030_reg",
	.driver.owner	= THIS_MODULE,
};

static int __init twl4030reg_init(void)
{
	return platform_driver_register(&twl4030reg_driver);
}
subsys_initcall(twl4030reg_init);

static void __exit twl4030reg_exit(void)
{
	platform_driver_unregister(&twl4030reg_driver);
}
module_exit(twl4030reg_exit)

MODULE_DESCRIPTION("TWL4030 regulator driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
fa16a5c1 DB	1	/*
	2	* twl4030-regulator.c -- support regulators in twl4030 family chips
	3	*
	4	* Copyright (C) 2008 David Brownell
	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 as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/err.h>
	15	#include <linux/platform_device.h>
	16	#include <linux/regulator/driver.h>
	17	#include <linux/regulator/machine.h>
	18	#include <linux/i2c/twl4030.h>
	19
	20
	21	/*
	22	* The TWL4030/TW5030/TPS659x0 family chips include power management, a
	23	* USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions
	24	* include an audio codec, battery charger, and more voltage regulators.
	25	* These chips are often used in OMAP-based systems.
	26	*
	27	* This driver implements software-based resource control for various
	28	* voltage regulators. This is usually augmented with state machine
	29	* based control.
	30	*/
	31
	32	struct twlreg_info {
	33	/* start of regulator's PM_RECEIVER control register bank */
	34	u8 base;
	35
	36	/* twl4030 resource ID, for resource control state machine */
	37	u8 id;
	38
	39	/* voltage in mV = table[VSEL]; table_len must be a power-of-two */
	40	u8 table_len;
	41	const u16 *table;
	42
	43	/* chip constraints on regulator behavior */
	44	u16 min_mV;
fa16a5c1 DB	45
	46	/* used by regulator core */
	47	struct regulator_desc desc;
	48	};
	49
	50
	51	/* LDO control registers ... offset is from the base of its register bank.
	52	* The first three registers of all power resource banks help hardware to
	53	* manage the various resource groups.
	54	*/
	55	#define VREG_GRP 0
	56	#define VREG_TYPE 1
	57	#define VREG_REMAP 2
	58	#define VREG_DEDICATED 3 /* LDO control */
	59
	60
	61	static inline int
	62	twl4030reg_read(struct twlreg_info *info, unsigned offset)
	63	{
	64	u8 value;
	65	int status;
	66
	67	status = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER,
	68	&value, info->base + offset);
	69	return (status < 0) ? status : value;
	70	}
	71
	72	static inline int
	73	twl4030reg_write(struct twlreg_info *info, unsigned offset, u8 value)
	74	{
	75	return twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
	76	value, info->base + offset);
	77	}
	78
	79	/----------------------------------------------------------------------/
	80
	81	/* generic power resource operations, which work on all regulators */
	82
	83	static int twl4030reg_grp(struct regulator_dev *rdev)
	84	{
	85	return twl4030reg_read(rdev_get_drvdata(rdev), VREG_GRP);
	86	}
	87
	88	/*
	89	* Enable/disable regulators by joining/leaving the P1 (processor) group.
	90	* We assume nobody else is updating the DEV_GRP registers.
	91	*/
	92
	93	#define P3_GRP BIT(7) /* "peripherals" */
	94	#define P2_GRP BIT(6) /* secondary processor, modem, etc */
	95	#define P1_GRP BIT(5) /* CPU/Linux */
	96
	97	static int twl4030reg_is_enabled(struct regulator_dev *rdev)
	98	{
	99	int state = twl4030reg_grp(rdev);
	100
	101	if (state < 0)
	102	return state;
	103
	104	return (state & P1_GRP) != 0;
	105	}
	106
	107	static int twl4030reg_enable(struct regulator_dev *rdev)
	108	{
109	struct twlreg_info *info = rdev_get_drvdata(rdev);
110	int grp;
111
112	grp = twl4030reg_read(info, VREG_GRP);
113	if (grp < 0)
114	return grp;
115
116	grp \|= P1_GRP;
117	return twl4030reg_write(info, VREG_GRP, grp);
118	}
119
120	static int twl4030reg_disable(struct regulator_dev *rdev)
121	{
122	struct twlreg_info *info = rdev_get_drvdata(rdev);
123	int grp;
124
125	grp = twl4030reg_read(info, VREG_GRP);
126	if (grp < 0)
127	return grp;
128
129	grp &= ~P1_GRP;
130	return twl4030reg_write(info, VREG_GRP, grp);
131	}
132
133	static int twl4030reg_get_status(struct regulator_dev *rdev)
134	{
135	int state = twl4030reg_grp(rdev);
136
137	if (state < 0)
138	return state;
139	state &= 0x0f;
140
141	/* assume state != WARM_RESET; we'd not be running... */
142	if (!state)
143	return REGULATOR_STATUS_OFF;
144	return (state & BIT(3))
145	? REGULATOR_STATUS_NORMAL
146	: REGULATOR_STATUS_STANDBY;
147	}
148
149	static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode)
150	{
151	struct twlreg_info *info = rdev_get_drvdata(rdev);
152	unsigned message;
153	int status;
154
155	/* We can only set the mode through state machine commands... */
156	switch (mode) {
157	case REGULATOR_MODE_NORMAL:
158	message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_ACTIVE);
159	break;
160	case REGULATOR_MODE_STANDBY:
161	message = MSG_SINGULAR(DEV_GRP_P1, info->id, RES_STATE_SLEEP);
162	break;
163	default:
164	return -EINVAL;
165	}
166
167	/* Ensure the resource is associated with some group */
168	status = twl4030reg_grp(rdev);
169	if (status < 0)
170	return status;
171	if (!(status & (P3_GRP \| P2_GRP \| P1_GRP)))
172	return -EACCES;
173
174	status = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
175	message >> 8, 0x15 /* PB_WORD_MSB */ );
176	if (status >= 0)
177	return status;
178
179	return twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
180	message, 0x16 /* PB_WORD_LSB */ );
181	}
182
183	/----------------------------------------------------------------------/
184
185	/*
186	* Support for adjustable-voltage LDOs uses a four bit (or less) voltage
187	* select field in its control register. We use tables indexed by VSEL
188	* to record voltages in milliVolts. (Accuracy is about three percent.)
189	*
190	* Note that VSEL values for VAUX2 changed in twl5030 and newer silicon;
191	* currently handled by listing two slightly different VAUX2 regulators,
192	* only one of which will be configured.
193	*
194	* VSEL values documented as "TI cannot support these values" are flagged
195	* in these tables as UNSUP() values; we normally won't assign them.
196	*/
197	#ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
198	#define UNSUP_MASK 0x0000
199	#else
200	#define UNSUP_MASK 0x8000
201	#endif
202
203	#define UNSUP(x) (UNSUP_MASK \| (x))
204	#define IS_UNSUP(x) (UNSUP_MASK & (x))
205	#define LDO_MV(x) (~UNSUP_MASK & (x))
206
207
208	static const u16 VAUX1_VSEL_table[] = {
209	UNSUP(1500), UNSUP(1800), 2500, 2800,
210	3000, 3000, 3000, 3000,
211	};
212	static const u16 VAUX2_4030_VSEL_table[] = {
213	UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
214	1500, 1800, UNSUP(1850), 2500,
215	UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
216	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
217	};
218	static const u16 VAUX2_VSEL_table[] = {
219	1700, 1700, 1900, 1300,
220	1500, 1800, 2000, 2500,
221	2100, 2800, 2200, 2300,
222	2400, 2400, 2400, 2400,
223	};
224	static const u16 VAUX3_VSEL_table[] = {
225	1500, 1800, 2500, 2800,
226	UNSUP(3000), UNSUP(3000), UNSUP(3000), UNSUP(3000),
227	};
228	static const u16 VAUX4_VSEL_table[] = {
229	700, 1000, 1200, UNSUP(1300),
230	1500, 1800, UNSUP(1850), 2500,
1897e742 DB	231	UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
1897e742 DB	232	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
fa16a5c1 DB	233	};
	234	static const u16 VMMC1_VSEL_table[] = {
	235	1850, 2850, 3000, 3150,
	236	};
	237	static const u16 VMMC2_VSEL_table[] = {
	238	UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
	239	UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
	240	2600, 2800, 2850, 3000,
	241	3150, 3150, 3150, 3150,
	242	};
	243	static const u16 VPLL1_VSEL_table[] = {
	244	1000, 1200, 1300, 1800,
	245	UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
	246	};
	247	static const u16 VPLL2_VSEL_table[] = {
	248	700, 1000, 1200, 1300,
	249	UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
	250	UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
	251	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
	252	};
	253	static const u16 VSIM_VSEL_table[] = {
	254	UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
	255	2800, 3000, 3000, 3000,
	256	};
	257	static const u16 VDAC_VSEL_table[] = {
	258	1200, 1300, 1800, 1800,
	259	};
	260
	261
66b659e6 DB	262	static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
	263	{
	264	struct twlreg_info *info = rdev_get_drvdata(rdev);
	265	int mV = info->table[index];
	266
	267	return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
	268	}
	269
fa16a5c1 DB	270	static int
	271	twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
	272	{
	273	struct twlreg_info *info = rdev_get_drvdata(rdev);
	274	int vsel;
	275
	276	for (vsel = 0; vsel < info->table_len; vsel++) {
	277	int mV = info->table[vsel];
	278	int uV;
	279
	280	if (IS_UNSUP(mV))
	281	continue;
	282	uV = LDO_MV(mV) * 1000;
	283
66b659e6 DB	284	/* REVISIT for VAUX2, first match may not be best/lowest */
66b659e6 DB	285
fa16a5c1 DB	286	/* use the first in-range value */
	287	if (min_uV <= uV && uV <= max_uV)
	288	return twl4030reg_write(info, VREG_DEDICATED, vsel);
	289	}
	290
	291	return -EDOM;
	292	}
	293
	294	static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
	295	{
	296	struct twlreg_info *info = rdev_get_drvdata(rdev);
	297	int vsel = twl4030reg_read(info, VREG_DEDICATED);
	298
	299	if (vsel < 0)
	300	return vsel;
	301
	302	vsel &= info->table_len - 1;
	303	return LDO_MV(info->table[vsel]) * 1000;
	304	}
	305
	306	static struct regulator_ops twl4030ldo_ops = {
66b659e6 DB	307	.list_voltage = twl4030ldo_list_voltage,
66b659e6 DB	308
fa16a5c1 DB	309	.set_voltage = twl4030ldo_set_voltage,
	310	.get_voltage = twl4030ldo_get_voltage,
	311
	312	.enable = twl4030reg_enable,
	313	.disable = twl4030reg_disable,
	314	.is_enabled = twl4030reg_is_enabled,
	315
	316	.set_mode = twl4030reg_set_mode,
	317
	318	.get_status = twl4030reg_get_status,
	319	};
	320
	321	/----------------------------------------------------------------------/
	322
	323	/*
	324	* Fixed voltage LDOs don't have a VSEL field to update.
	325	*/
66b659e6 DB	326	static int twl4030fixed_list_voltage(struct regulator_dev *rdev, unsigned index)
	327	{
	328	struct twlreg_info *info = rdev_get_drvdata(rdev);
	329
	330	return info->min_mV * 1000;
	331	}
	332
fa16a5c1 DB	333	static int twl4030fixed_get_voltage(struct regulator_dev *rdev)
	334	{
	335	struct twlreg_info *info = rdev_get_drvdata(rdev);
	336
	337	return info->min_mV * 1000;
	338	}
	339
	340	static struct regulator_ops twl4030fixed_ops = {
66b659e6 DB	341	.list_voltage = twl4030fixed_list_voltage,
66b659e6 DB	342
fa16a5c1 DB	343	.get_voltage = twl4030fixed_get_voltage,
	344
	345	.enable = twl4030reg_enable,
	346	.disable = twl4030reg_disable,
	347	.is_enabled = twl4030reg_is_enabled,
	348
	349	.set_mode = twl4030reg_set_mode,
	350
	351	.get_status = twl4030reg_get_status,
	352	};
	353
	354	/----------------------------------------------------------------------/
	355
	356	#define TWL_ADJUSTABLE_LDO(label, offset, num) { \
	357	.base = offset, \
	358	.id = num, \
	359	.table_len = ARRAY_SIZE(label##_VSEL_table), \
	360	.table = label##_VSEL_table, \
	361	.desc = { \
	362	.name = #label, \
	363	.id = TWL4030_REG_##label, \
66b659e6	364	.n_voltages = ARRAY_SIZE(label##_VSEL_table), \
fa16a5c1 DB	365	.ops = &twl4030ldo_ops, \
	366	.type = REGULATOR_VOLTAGE, \
	367	.owner = THIS_MODULE, \
	368	}, \
	369	}
	370
	371	#define TWL_FIXED_LDO(label, offset, mVolts, num) { \
	372	.base = offset, \
	373	.id = num, \
	374	.min_mV = mVolts, \
fa16a5c1 DB	375	.desc = { \
	376	.name = #label, \
	377	.id = TWL4030_REG_##label, \
66b659e6	378	.n_voltages = 1, \
fa16a5c1 DB	379	.ops = &twl4030fixed_ops, \
	380	.type = REGULATOR_VOLTAGE, \
	381	.owner = THIS_MODULE, \
	382	}, \
	383	}
	384
	385	/*
	386	* We list regulators here if systems need some level of
	387	* software control over them after boot.
	388	*/
	389	static struct twlreg_info twl4030_regs[] = {
	390	TWL_ADJUSTABLE_LDO(VAUX1, 0x17, 1),
	391	TWL_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2),
	392	TWL_ADJUSTABLE_LDO(VAUX2, 0x1b, 2),
	393	TWL_ADJUSTABLE_LDO(VAUX3, 0x1f, 3),
	394	TWL_ADJUSTABLE_LDO(VAUX4, 0x23, 4),
	395	TWL_ADJUSTABLE_LDO(VMMC1, 0x27, 5),
	396	TWL_ADJUSTABLE_LDO(VMMC2, 0x2b, 6),
	397	/*
	398	TWL_ADJUSTABLE_LDO(VPLL1, 0x2f, 7),
fa16a5c1	399	*/
52914eaa	400	TWL_ADJUSTABLE_LDO(VPLL2, 0x33, 8),
fa16a5c1 DB	401	TWL_ADJUSTABLE_LDO(VSIM, 0x37, 9),
	402	TWL_ADJUSTABLE_LDO(VDAC, 0x3b, 10),
	403	/*
	404	TWL_ADJUSTABLE_LDO(VINTANA1, 0x3f, 11),
	405	TWL_ADJUSTABLE_LDO(VINTANA2, 0x43, 12),
	406	TWL_ADJUSTABLE_LDO(VINTDIG, 0x47, 13),
	407	TWL_SMPS(VIO, 0x4b, 14),
	408	TWL_SMPS(VDD1, 0x55, 15),
	409	TWL_SMPS(VDD2, 0x63, 16),
	410	*/
	411	TWL_FIXED_LDO(VUSB1V5, 0x71, 1500, 17),
	412	TWL_FIXED_LDO(VUSB1V8, 0x74, 1800, 18),
	413	TWL_FIXED_LDO(VUSB3V1, 0x77, 3100, 19),
	414	/* VUSBCP is managed only by the USB subchip */
	415	};
	416
	417	static int twl4030reg_probe(struct platform_device *pdev)
	418	{
	419	int i;
	420	struct twlreg_info *info;
	421	struct regulator_init_data *initdata;
	422	struct regulation_constraints *c;
	423	struct regulator_dev *rdev;
fa16a5c1 DB	424
	425	for (i = 0, info = NULL; i < ARRAY_SIZE(twl4030_regs); i++) {
	426	if (twl4030_regs[i].desc.id != pdev->id)
	427	continue;
	428	info = twl4030_regs + i;
fa16a5c1 DB	429	break;
	430	}
	431	if (!info)
	432	return -ENODEV;
	433
	434	initdata = pdev->dev.platform_data;
	435	if (!initdata)
	436	return -EINVAL;
	437
	438	/* Constrain board-specific capabilities according to what
	439	* this driver and the chip itself can actually do.
	440	*/
	441	c = &initdata->constraints;
fa16a5c1 DB	442	c->valid_modes_mask &= REGULATOR_MODE_NORMAL \| REGULATOR_MODE_STANDBY;
	443	c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
	444	\| REGULATOR_CHANGE_MODE
	445	\| REGULATOR_CHANGE_STATUS;
	446
	447	rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
	448	if (IS_ERR(rdev)) {
	449	dev_err(&pdev->dev, "can't register %s, %ld\n",
	450	info->desc.name, PTR_ERR(rdev));
	451	return PTR_ERR(rdev);
	452	}
	453	platform_set_drvdata(pdev, rdev);
	454
	455	/* NOTE: many regulators support short-circuit IRQs (presentable
	456	* as REGULATOR_OVER_CURRENT notifications?) configured via:
	457	* - SC_CONFIG
	458	* - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
	459	* - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
	460	* - IT_CONFIG
	461	*/
	462
	463	return 0;
	464	}
	465
	466	static int __devexit twl4030reg_remove(struct platform_device *pdev)
	467	{
	468	regulator_unregister(platform_get_drvdata(pdev));
	469	return 0;
	470	}
	471
	472	MODULE_ALIAS("platform:twl4030_reg");
	473
	474	static struct platform_driver twl4030reg_driver = {
	475	.probe = twl4030reg_probe,
	476	.remove = __devexit_p(twl4030reg_remove),
	477	/* NOTE: short name, to work around driver model truncation of
	478	* "twl4030_regulator.12" (and friends) to "twl4030_regulator.1".
	479	*/
	480	.driver.name = "twl4030_reg",
	481	.driver.owner = THIS_MODULE,
	482	};
	483
	484	static int __init twl4030reg_init(void)
	485	{
fa16a5c1 DB	486	return platform_driver_register(&twl4030reg_driver);
	487	}
	488	subsys_initcall(twl4030reg_init);
	489
	490	static void __exit twl4030reg_exit(void)
	491	{
	492	platform_driver_unregister(&twl4030reg_driver);
	493	}
	494	module_exit(twl4030reg_exit)
	495
	496	MODULE_DESCRIPTION("TWL4030 regulator driver");
	497	MODULE_LICENSE("GPL");