[mirror_ubuntu-bionic-kernel.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.
 *
 * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
 * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
 */
#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,
	3000, 3000, 3000, 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.
d6bb69cf AH	196	*
	197	* VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported.
	198	* TI are revising the twl5030/tps659x0 specs to support that 3.0V setting.
fa16a5c1 DB	199	*/
	200	#ifdef CONFIG_TWL4030_ALLOW_UNSUPPORTED
	201	#define UNSUP_MASK 0x0000
	202	#else
	203	#define UNSUP_MASK 0x8000
	204	#endif
	205
	206	#define UNSUP(x) (UNSUP_MASK \| (x))
	207	#define IS_UNSUP(x) (UNSUP_MASK & (x))
	208	#define LDO_MV(x) (~UNSUP_MASK & (x))
	209
	210
	211	static const u16 VAUX1_VSEL_table[] = {
	212	UNSUP(1500), UNSUP(1800), 2500, 2800,
	213	3000, 3000, 3000, 3000,
	214	};
	215	static const u16 VAUX2_4030_VSEL_table[] = {
	216	UNSUP(1000), UNSUP(1000), UNSUP(1200), 1300,
	217	1500, 1800, UNSUP(1850), 2500,
	218	UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
	219	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
	220	};
	221	static const u16 VAUX2_VSEL_table[] = {
	222	1700, 1700, 1900, 1300,
	223	1500, 1800, 2000, 2500,
	224	2100, 2800, 2200, 2300,
	225	2400, 2400, 2400, 2400,
	226	};
	227	static const u16 VAUX3_VSEL_table[] = {
	228	1500, 1800, 2500, 2800,
d6bb69cf	229	3000, 3000, 3000, 3000,
fa16a5c1 DB	230	};
	231	static const u16 VAUX4_VSEL_table[] = {
	232	700, 1000, 1200, UNSUP(1300),
	233	1500, 1800, UNSUP(1850), 2500,
1897e742 DB	234	UNSUP(2600), 2800, UNSUP(2850), UNSUP(3000),
1897e742 DB	235	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
fa16a5c1 DB	236	};
	237	static const u16 VMMC1_VSEL_table[] = {
	238	1850, 2850, 3000, 3150,
	239	};
	240	static const u16 VMMC2_VSEL_table[] = {
	241	UNSUP(1000), UNSUP(1000), UNSUP(1200), UNSUP(1300),
	242	UNSUP(1500), UNSUP(1800), 1850, UNSUP(2500),
	243	2600, 2800, 2850, 3000,
	244	3150, 3150, 3150, 3150,
	245	};
	246	static const u16 VPLL1_VSEL_table[] = {
	247	1000, 1200, 1300, 1800,
	248	UNSUP(2800), UNSUP(3000), UNSUP(3000), UNSUP(3000),
	249	};
	250	static const u16 VPLL2_VSEL_table[] = {
	251	700, 1000, 1200, 1300,
	252	UNSUP(1500), 1800, UNSUP(1850), UNSUP(2500),
	253	UNSUP(2600), UNSUP(2800), UNSUP(2850), UNSUP(3000),
	254	UNSUP(3150), UNSUP(3150), UNSUP(3150), UNSUP(3150),
	255	};
	256	static const u16 VSIM_VSEL_table[] = {
	257	UNSUP(1000), UNSUP(1200), UNSUP(1300), 1800,
	258	2800, 3000, 3000, 3000,
	259	};
	260	static const u16 VDAC_VSEL_table[] = {
	261	1200, 1300, 1800, 1800,
	262	};
	263
	264
66b659e6 DB	265	static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index)
	266	{
	267	struct twlreg_info *info = rdev_get_drvdata(rdev);
	268	int mV = info->table[index];
	269
	270	return IS_UNSUP(mV) ? 0 : (LDO_MV(mV) * 1000);
	271	}
	272
fa16a5c1 DB	273	static int
	274	twl4030ldo_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV)
	275	{
	276	struct twlreg_info *info = rdev_get_drvdata(rdev);
	277	int vsel;
	278
	279	for (vsel = 0; vsel < info->table_len; vsel++) {
	280	int mV = info->table[vsel];
	281	int uV;
	282
	283	if (IS_UNSUP(mV))
	284	continue;
	285	uV = LDO_MV(mV) * 1000;
	286
66b659e6 DB	287	/* REVISIT for VAUX2, first match may not be best/lowest */
66b659e6 DB	288
fa16a5c1 DB	289	/* use the first in-range value */
	290	if (min_uV <= uV && uV <= max_uV)
	291	return twl4030reg_write(info, VREG_DEDICATED, vsel);
	292	}
	293
	294	return -EDOM;
	295	}
	296
	297	static int twl4030ldo_get_voltage(struct regulator_dev *rdev)
	298	{
	299	struct twlreg_info *info = rdev_get_drvdata(rdev);
	300	int vsel = twl4030reg_read(info, VREG_DEDICATED);
	301
	302	if (vsel < 0)
	303	return vsel;
	304
	305	vsel &= info->table_len - 1;
	306	return LDO_MV(info->table[vsel]) * 1000;
	307	}
	308
	309	static struct regulator_ops twl4030ldo_ops = {
66b659e6 DB	310	.list_voltage = twl4030ldo_list_voltage,
66b659e6 DB	311
fa16a5c1 DB	312	.set_voltage = twl4030ldo_set_voltage,
	313	.get_voltage = twl4030ldo_get_voltage,
	314
	315	.enable = twl4030reg_enable,
	316	.disable = twl4030reg_disable,
	317	.is_enabled = twl4030reg_is_enabled,
	318
	319	.set_mode = twl4030reg_set_mode,
	320
	321	.get_status = twl4030reg_get_status,
	322	};
	323
	324	/----------------------------------------------------------------------/
	325
	326	/*
	327	* Fixed voltage LDOs don't have a VSEL field to update.
	328	*/
66b659e6 DB	329	static int twl4030fixed_list_voltage(struct regulator_dev *rdev, unsigned index)
	330	{
	331	struct twlreg_info *info = rdev_get_drvdata(rdev);
	332
	333	return info->min_mV * 1000;
	334	}
	335
fa16a5c1 DB	336	static int twl4030fixed_get_voltage(struct regulator_dev *rdev)
	337	{
	338	struct twlreg_info *info = rdev_get_drvdata(rdev);
	339
	340	return info->min_mV * 1000;
	341	}
	342
	343	static struct regulator_ops twl4030fixed_ops = {
66b659e6 DB	344	.list_voltage = twl4030fixed_list_voltage,
66b659e6 DB	345
fa16a5c1 DB	346	.get_voltage = twl4030fixed_get_voltage,
	347
	348	.enable = twl4030reg_enable,
	349	.disable = twl4030reg_disable,
	350	.is_enabled = twl4030reg_is_enabled,
	351
	352	.set_mode = twl4030reg_set_mode,
	353
	354	.get_status = twl4030reg_get_status,
	355	};
	356
	357	/----------------------------------------------------------------------/
	358
	359	#define TWL_ADJUSTABLE_LDO(label, offset, num) { \
	360	.base = offset, \
	361	.id = num, \
	362	.table_len = ARRAY_SIZE(label##_VSEL_table), \
	363	.table = label##_VSEL_table, \
	364	.desc = { \
	365	.name = #label, \
	366	.id = TWL4030_REG_##label, \
66b659e6	367	.n_voltages = ARRAY_SIZE(label##_VSEL_table), \
fa16a5c1 DB	368	.ops = &twl4030ldo_ops, \
	369	.type = REGULATOR_VOLTAGE, \
	370	.owner = THIS_MODULE, \
	371	}, \
	372	}
	373
	374	#define TWL_FIXED_LDO(label, offset, mVolts, num) { \
	375	.base = offset, \
	376	.id = num, \
	377	.min_mV = mVolts, \
fa16a5c1 DB	378	.desc = { \
	379	.name = #label, \
	380	.id = TWL4030_REG_##label, \
66b659e6	381	.n_voltages = 1, \
fa16a5c1 DB	382	.ops = &twl4030fixed_ops, \
	383	.type = REGULATOR_VOLTAGE, \
	384	.owner = THIS_MODULE, \
	385	}, \
	386	}
	387
	388	/*
	389	* We list regulators here if systems need some level of
	390	* software control over them after boot.
	391	*/
	392	static struct twlreg_info twl4030_regs[] = {
	393	TWL_ADJUSTABLE_LDO(VAUX1, 0x17, 1),
	394	TWL_ADJUSTABLE_LDO(VAUX2_4030, 0x1b, 2),
	395	TWL_ADJUSTABLE_LDO(VAUX2, 0x1b, 2),
	396	TWL_ADJUSTABLE_LDO(VAUX3, 0x1f, 3),
	397	TWL_ADJUSTABLE_LDO(VAUX4, 0x23, 4),
	398	TWL_ADJUSTABLE_LDO(VMMC1, 0x27, 5),
	399	TWL_ADJUSTABLE_LDO(VMMC2, 0x2b, 6),
	400	/*
	401	TWL_ADJUSTABLE_LDO(VPLL1, 0x2f, 7),
fa16a5c1	402	*/
52914eaa	403	TWL_ADJUSTABLE_LDO(VPLL2, 0x33, 8),
fa16a5c1 DB	404	TWL_ADJUSTABLE_LDO(VSIM, 0x37, 9),
	405	TWL_ADJUSTABLE_LDO(VDAC, 0x3b, 10),
	406	/*
	407	TWL_ADJUSTABLE_LDO(VINTANA1, 0x3f, 11),
	408	TWL_ADJUSTABLE_LDO(VINTANA2, 0x43, 12),
	409	TWL_ADJUSTABLE_LDO(VINTDIG, 0x47, 13),
	410	TWL_SMPS(VIO, 0x4b, 14),
	411	TWL_SMPS(VDD1, 0x55, 15),
	412	TWL_SMPS(VDD2, 0x63, 16),
	413	*/
	414	TWL_FIXED_LDO(VUSB1V5, 0x71, 1500, 17),
	415	TWL_FIXED_LDO(VUSB1V8, 0x74, 1800, 18),
	416	TWL_FIXED_LDO(VUSB3V1, 0x77, 3100, 19),
	417	/* VUSBCP is managed only by the USB subchip */
	418	};
	419
	420	static int twl4030reg_probe(struct platform_device *pdev)
	421	{
	422	int i;
	423	struct twlreg_info *info;
	424	struct regulator_init_data *initdata;
	425	struct regulation_constraints *c;
	426	struct regulator_dev *rdev;
fa16a5c1 DB	427
	428	for (i = 0, info = NULL; i < ARRAY_SIZE(twl4030_regs); i++) {
	429	if (twl4030_regs[i].desc.id != pdev->id)
	430	continue;
	431	info = twl4030_regs + i;
fa16a5c1 DB	432	break;
	433	}
	434	if (!info)
	435	return -ENODEV;
	436
	437	initdata = pdev->dev.platform_data;
	438	if (!initdata)
	439	return -EINVAL;
	440
	441	/* Constrain board-specific capabilities according to what
	442	* this driver and the chip itself can actually do.
	443	*/
	444	c = &initdata->constraints;
fa16a5c1 DB	445	c->valid_modes_mask &= REGULATOR_MODE_NORMAL \| REGULATOR_MODE_STANDBY;
	446	c->valid_ops_mask &= REGULATOR_CHANGE_VOLTAGE
	447	\| REGULATOR_CHANGE_MODE
	448	\| REGULATOR_CHANGE_STATUS;
	449
	450	rdev = regulator_register(&info->desc, &pdev->dev, initdata, info);
	451	if (IS_ERR(rdev)) {
	452	dev_err(&pdev->dev, "can't register %s, %ld\n",
	453	info->desc.name, PTR_ERR(rdev));
	454	return PTR_ERR(rdev);
	455	}
	456	platform_set_drvdata(pdev, rdev);
	457
	458	/* NOTE: many regulators support short-circuit IRQs (presentable
	459	* as REGULATOR_OVER_CURRENT notifications?) configured via:
	460	* - SC_CONFIG
	461	* - SC_DETECT1 (vintana2, vmmc1/2, vaux1/2/3/4)
	462	* - SC_DETECT2 (vusb, vdac, vio, vdd1/2, vpll2)
	463	* - IT_CONFIG
	464	*/
	465
	466	return 0;
	467	}
	468
	469	static int __devexit twl4030reg_remove(struct platform_device *pdev)
	470	{
	471	regulator_unregister(platform_get_drvdata(pdev));
	472	return 0;
	473	}
	474
	475	MODULE_ALIAS("platform:twl4030_reg");
	476
	477	static struct platform_driver twl4030reg_driver = {
	478	.probe = twl4030reg_probe,
	479	.remove = __devexit_p(twl4030reg_remove),
	480	/* NOTE: short name, to work around driver model truncation of
	481	* "twl4030_regulator.12" (and friends) to "twl4030_regulator.1".
	482	*/
	483	.driver.name = "twl4030_reg",
	484	.driver.owner = THIS_MODULE,
	485	};
	486
	487	static int __init twl4030reg_init(void)
	488	{
fa16a5c1 DB	489	return platform_driver_register(&twl4030reg_driver);
	490	}
	491	subsys_initcall(twl4030reg_init);
	492
	493	static void __exit twl4030reg_exit(void)
	494	{
	495	platform_driver_unregister(&twl4030reg_driver);
	496	}
	497	module_exit(twl4030reg_exit)
	498
	499	MODULE_DESCRIPTION("TWL4030 regulator driver");
	500	MODULE_LICENSE("GPL");