regulator: twl4030 regulators (fa16a5c1) · Commits · 戴 / test

drivers/regulator/Kconfig

+7 −0

Original line number	Diff line number	Diff line
		@@ -56,6 +56,13 @@ config REGULATOR_BQ24022
		charging select between 100 mA and 500 mA charging current
		limit.

		config REGULATOR_TWL4030
		bool "TI TWL4030/TWL5030/TPS695x0 PMIC"
		depends on TWL4030_CORE
		help
		This driver supports the voltage regulators provided by
		this family of companion chips.

		config REGULATOR_WM8350
		tristate "Wolfson Microelectroncis WM8350 AudioPlus PMIC"
		depends on MFD_WM8350

drivers/regulator/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -8,6 +8,7 @@ obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
		obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o

		obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o
		obj-$(CONFIG_REGULATOR_TWL4030) += twl4030-regulator.o
		obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
		obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
		obj-$(CONFIG_REGULATOR_DA903X) += da903x.o

drivers/regulator/twl4030-regulator.c

0 → 100644

+511 −0

Original line number	Diff line number	Diff line
		/*
		* 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;
		u16 max_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,
		};
		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_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;

		/* 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 = {
		.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_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 = {
		.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, \
		.ops = &twl4030ldo_ops, \
		.type = REGULATOR_VOLTAGE, \
		.owner = THIS_MODULE, \
		}, \
		}

		#define TWL_FIXED_LDO(label, offset, mVolts, num) { \
		.base = offset, \
		.id = num, \
		.min_mV = mVolts, \
		.max_mV = mVolts, \
		.desc = { \
		.name = #label, \
		.id = TWL4030_REG_##label, \
		.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;
		int min_uV, max_uV;

		for (i = 0, info = NULL; i < ARRAY_SIZE(twl4030_regs); i++) {
		if (twl4030_regs[i].desc.id != pdev->id)
		continue;
		info = twl4030_regs + i;
		min_uV = info->min_mV * 1000;
		max_uV = info->max_mV * 1000;
		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;
		if (!c->min_uV \|\| c->min_uV < min_uV)
		c->min_uV = min_uV;
		if (!c->max_uV \|\| c->max_uV > max_uV)
		c->max_uV = max_uV;
		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)
		{
		unsigned i, j;

		/* determine min/max voltage constraints, taking into account
		* whether set_voltage() will use the "unsupported" settings
		*/
		for (i = 0; i < ARRAY_SIZE(twl4030_regs); i++) {
		struct twlreg_info *info = twl4030_regs + i;
		const u16 *table;

		/* fixed-voltage regulators */
		if (!info->table_len)
		continue;

		/* LDO regulators: */
		for (j = 0, table = info->table;
		j < info->table_len;
		j++, table++) {
		u16 mV = *table;

		if (IS_UNSUP(mV))
		continue;
		mV = LDO_MV(mV);

		if (info->min_mV == 0 \|\| info->min_mV > mV)
		info->min_mV = mV;
		if (info->max_mV < mV)
		info->max_mV = mV;
		}
		}

		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");

include/linux/i2c/twl4030.h

+47 −0

Original line number	Diff line number	Diff line
		@@ -218,6 +218,53 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);

		/----------------------------------------------------------------------/

		/* Power bus message definitions */

		#define DEV_GRP_NULL 0x0
		#define DEV_GRP_P1 0x1
		#define DEV_GRP_P2 0x2
		#define DEV_GRP_P3 0x4

		#define RES_GRP_RES 0x0
		#define RES_GRP_PP 0x1
		#define RES_GRP_RC 0x2
		#define RES_GRP_PP_RC 0x3
		#define RES_GRP_PR 0x4
		#define RES_GRP_PP_PR 0x5
		#define RES_GRP_RC_PR 0x6
		#define RES_GRP_ALL 0x7

		#define RES_TYPE2_R0 0x0

		#define RES_TYPE_ALL 0x7

		#define RES_STATE_WRST 0xF
		#define RES_STATE_ACTIVE 0xE
		#define RES_STATE_SLEEP 0x8
		#define RES_STATE_OFF 0x0

		/*
		* Power Bus Message Format ... these can be sent individually by Linux,
		* but are usually part of downloaded scripts that are run when various
		* power events are triggered.
		*
		* Broadcast Message (16 Bits):
		* DEV_GRP[15:13] MT[12] RES_GRP[11:9] RES_TYPE2[8:7] RES_TYPE[6:4]
		* RES_STATE[3:0]
		*
		* Singular Message (16 Bits):
		* DEV_GRP[15:13] MT[12] RES_ID[11:4] RES_STATE[3:0]
		*/

		#define MSG_BROADCAST(devgrp, grp, type, type2, state) \
		( (devgrp) << 13 \| 1 << 12 \| (grp) << 9 \| (type2) << 7 \
		\| (type) << 4 \| (state))

		#define MSG_SINGULAR(devgrp, id, state) \
		((devgrp) << 13 \| 0 << 12 \| (id) << 4 \| (state))

		/----------------------------------------------------------------------/

		struct twl4030_bci_platform_data {
		int *battery_tmp_tbl;
		unsigned int tblsize;

Admin message