regulator: add driver for tps6524x regulator (1394fd28) · Commits · e / devices / android_kernel_teracube_mt6765

drivers/regulator/Kconfig

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Original line number	Diff line number	Diff line
		@@ -250,5 +250,15 @@ config REGULATOR_TPS6586X
		help
		This driver supports TPS6586X voltage regulator chips.

		config REGULATOR_TPS6524X
		tristate "TI TPS6524X Power regulators"
		depends on SPI
		help
		This driver supports TPS6524X voltage regulator chips. TPS6524X
		provides three step-down converters and two general-purpose LDO
		voltage regulators. This device is interfaced using a customized
		serial interface currently supported on the sequencer serial
		port controller.

		endif

drivers/regulator/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -34,6 +34,7 @@ obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o

		obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
		obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
		obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
		obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
		obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
		obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o

drivers/regulator/tps6524x-regulator.c

0 → 100644

+693 −0

Original line number	Diff line number	Diff line
		/*
		* Regulator driver for TPS6524x PMIC
		*
		* Copyright (C) 2010 Texas Instruments
		*
		* 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 version 2.
		*
		* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
		* whether express or implied; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
		* General Public License for more details.
		*/

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/err.h>
		#include <linux/errno.h>
		#include <linux/slab.h>
		#include <linux/spi/spi.h>
		#include <linux/regulator/driver.h>
		#include <linux/regulator/machine.h>

		#define REG_LDO_SET 0x0
		#define LDO_ILIM_MASK 1 /* 0 = 400-800, 1 = 900-1500 */
		#define LDO_VSEL_MASK 0x0f
		#define LDO2_ILIM_SHIFT 12
		#define LDO2_VSEL_SHIFT 4
		#define LDO1_ILIM_SHIFT 8
		#define LDO1_VSEL_SHIFT 0

		#define REG_BLOCK_EN 0x1
		#define BLOCK_MASK 1
		#define BLOCK_LDO1_SHIFT 0
		#define BLOCK_LDO2_SHIFT 1
		#define BLOCK_LCD_SHIFT 2
		#define BLOCK_USB_SHIFT 3

		#define REG_DCDC_SET 0x2
		#define DCDC_VDCDC_MASK 0x1f
		#define DCDC_VDCDC1_SHIFT 0
		#define DCDC_VDCDC2_SHIFT 5
		#define DCDC_VDCDC3_SHIFT 10

		#define REG_DCDC_EN 0x3
		#define DCDCDCDC_EN_MASK 0x1
		#define DCDCDCDC1_EN_SHIFT 0
		#define DCDCDCDC1_PG_MSK BIT(1)
		#define DCDCDCDC2_EN_SHIFT 2
		#define DCDCDCDC2_PG_MSK BIT(3)
		#define DCDCDCDC3_EN_SHIFT 4
		#define DCDCDCDC3_PG_MSK BIT(5)

		#define REG_USB 0x4
		#define USB_ILIM_SHIFT 0
		#define USB_ILIM_MASK 0x3
		#define USB_TSD_SHIFT 2
		#define USB_TSD_MASK 0x3
		#define USB_TWARN_SHIFT 4
		#define USB_TWARN_MASK 0x3
		#define USB_IWARN_SD BIT(6)
		#define USB_FAST_LOOP BIT(7)

		#define REG_ALARM 0x5
		#define ALARM_LDO1 BIT(0)
		#define ALARM_DCDC1 BIT(1)
		#define ALARM_DCDC2 BIT(2)
		#define ALARM_DCDC3 BIT(3)
		#define ALARM_LDO2 BIT(4)
		#define ALARM_USB_WARN BIT(5)
		#define ALARM_USB_ALARM BIT(6)
		#define ALARM_LCD BIT(9)
		#define ALARM_TEMP_WARM BIT(10)
		#define ALARM_TEMP_HOT BIT(11)
		#define ALARM_NRST BIT(14)
		#define ALARM_POWERUP BIT(15)

		#define REG_INT_ENABLE 0x6
		#define INT_LDO1 BIT(0)
		#define INT_DCDC1 BIT(1)
		#define INT_DCDC2 BIT(2)
		#define INT_DCDC3 BIT(3)
		#define INT_LDO2 BIT(4)
		#define INT_USB_WARN BIT(5)
		#define INT_USB_ALARM BIT(6)
		#define INT_LCD BIT(9)
		#define INT_TEMP_WARM BIT(10)
		#define INT_TEMP_HOT BIT(11)
		#define INT_GLOBAL_EN BIT(15)

		#define REG_INT_STATUS 0x7
		#define STATUS_LDO1 BIT(0)
		#define STATUS_DCDC1 BIT(1)
		#define STATUS_DCDC2 BIT(2)
		#define STATUS_DCDC3 BIT(3)
		#define STATUS_LDO2 BIT(4)
		#define STATUS_USB_WARN BIT(5)
		#define STATUS_USB_ALARM BIT(6)
		#define STATUS_LCD BIT(9)
		#define STATUS_TEMP_WARM BIT(10)
		#define STATUS_TEMP_HOT BIT(11)

		#define REG_SOFTWARE_RESET 0xb
		#define REG_WRITE_ENABLE 0xd
		#define REG_REV_ID 0xf

		#define N_DCDC 3
		#define N_LDO 2
		#define N_SWITCH 2
		#define N_REGULATORS (3 /* DCDC */ + \
		2 /* LDO */ + \
		2 /* switch */)

		#define FIXED_ILIMSEL BIT(0)
		#define FIXED_VOLTAGE BIT(1)

		#define CMD_READ(reg) ((reg) << 6)
		#define CMD_WRITE(reg) (BIT(5) \| (reg) << 6)
		#define STAT_CLK BIT(3)
		#define STAT_WRITE BIT(2)
		#define STAT_INVALID BIT(1)
		#define STAT_WP BIT(0)

		struct field {
		int reg;
		int shift;
		int mask;
		};

		struct supply_info {
		const char *name;
		int n_voltages;
		const int *voltages;
		int fixed_voltage;
		int n_ilimsels;
		const int *ilimsels;
		int fixed_ilimsel;
		int flags;
		struct field enable, voltage, ilimsel;
		};

		struct tps6524x {
		struct device *dev;
		struct spi_device *spi;
		struct mutex lock;
		struct regulator_desc desc[N_REGULATORS];
		struct regulator_dev *rdev[N_REGULATORS];
		};

		static int __read_reg(struct tps6524x *hw, int reg)
		{
		int error = 0;
		u16 cmd = CMD_READ(reg), in;
		u8 status;
		struct spi_message m;
		struct spi_transfer t[3];

		spi_message_init(&m);
		memset(t, 0, sizeof(t));

		t[0].tx_buf = &cmd;
		t[0].len = 2;
		t[0].bits_per_word = 12;
		spi_message_add_tail(&t[0], &m);

		t[1].rx_buf = &in;
		t[1].len = 2;
		t[1].bits_per_word = 16;
		spi_message_add_tail(&t[1], &m);

		t[2].rx_buf = &status;
		t[2].len = 1;
		t[2].bits_per_word = 4;
		spi_message_add_tail(&t[2], &m);

		error = spi_sync(hw->spi, &m);
		if (error < 0)
		return error;

		dev_dbg(hw->dev, "read reg %d, data %x, status %x\n",
		reg, in, status);

		if (!(status & STAT_CLK) \|\| (status & STAT_WRITE))
		return -EIO;

		if (status & STAT_INVALID)
		return -EINVAL;

		return in;
		}

		static int read_reg(struct tps6524x *hw, int reg)
		{
		int ret;

		mutex_lock(&hw->lock);
		ret = __read_reg(hw, reg);
		mutex_unlock(&hw->lock);

		return ret;
		}

		static int __write_reg(struct tps6524x *hw, int reg, int val)
		{
		int error = 0;
		u16 cmd = CMD_WRITE(reg), out = val;
		u8 status;
		struct spi_message m;
		struct spi_transfer t[3];

		spi_message_init(&m);
		memset(t, 0, sizeof(t));

		t[0].tx_buf = &cmd;
		t[0].len = 2;
		t[0].bits_per_word = 12;
		spi_message_add_tail(&t[0], &m);

		t[1].tx_buf = &out;
		t[1].len = 2;
		t[1].bits_per_word = 16;
		spi_message_add_tail(&t[1], &m);

		t[2].rx_buf = &status;
		t[2].len = 1;
		t[2].bits_per_word = 4;
		spi_message_add_tail(&t[2], &m);

		error = spi_sync(hw->spi, &m);
		if (error < 0)
		return error;

		dev_dbg(hw->dev, "wrote reg %d, data %x, status %x\n",
		reg, out, status);

		if (!(status & STAT_CLK) \|\| !(status & STAT_WRITE))
		return -EIO;

		if (status & (STAT_INVALID \| STAT_WP))
		return -EINVAL;

		return error;
		}

		static int __rmw_reg(struct tps6524x *hw, int reg, int mask, int val)
		{
		int ret;

		ret = __read_reg(hw, reg);
		if (ret < 0)
		return ret;

		ret &= ~mask;
		ret \|= val;

		ret = __write_reg(hw, reg, ret);

		return (ret < 0) ? ret : 0;
		}

		static int rmw_protect(struct tps6524x *hw, int reg, int mask, int val)
		{
		int ret;

		mutex_lock(&hw->lock);

		ret = __write_reg(hw, REG_WRITE_ENABLE, 1);
		if (ret) {
		dev_err(hw->dev, "failed to set write enable\n");
		goto error;
		}

		ret = __rmw_reg(hw, reg, mask, val);
		if (ret)
		dev_err(hw->dev, "failed to rmw register %d\n", reg);

		ret = __write_reg(hw, REG_WRITE_ENABLE, 0);
		if (ret) {
		dev_err(hw->dev, "failed to clear write enable\n");
		goto error;
		}

		error:
		mutex_unlock(&hw->lock);

		return ret;
		}

		static int read_field(struct tps6524x hw, const struct field field)
		{
		int tmp;

		tmp = read_reg(hw, field->reg);
		if (tmp < 0)
		return tmp;

		return (tmp >> field->shift) & field->mask;
		}

		static int write_field(struct tps6524x hw, const struct field field,
		int val)
		{
		if (val & ~field->mask)
		return -EOVERFLOW;

		return rmw_protect(hw, field->reg,
		field->mask << field->shift,
		val << field->shift);
		}

		static const int dcdc1_voltages[] = {
		800000, 825000, 850000, 875000,
		900000, 925000, 950000, 975000,
		1000000, 1025000, 1050000, 1075000,
		1100000, 1125000, 1150000, 1175000,
		1200000, 1225000, 1250000, 1275000,
		1300000, 1325000, 1350000, 1375000,
		1400000, 1425000, 1450000, 1475000,
		1500000, 1525000, 1550000, 1575000,
		};

		static const int dcdc2_voltages[] = {
		1400000, 1450000, 1500000, 1550000,
		1600000, 1650000, 1700000, 1750000,
		1800000, 1850000, 1900000, 1950000,
		2000000, 2050000, 2100000, 2150000,
		2200000, 2250000, 2300000, 2350000,
		2400000, 2450000, 2500000, 2550000,
		2600000, 2650000, 2700000, 2750000,
		2800000, 2850000, 2900000, 2950000,
		};

		static const int dcdc3_voltages[] = {
		2400000, 2450000, 2500000, 2550000, 2600000,
		2650000, 2700000, 2750000, 2800000, 2850000,
		2900000, 2950000, 3000000, 3050000, 3100000,
		3150000, 3200000, 3250000, 3300000, 3350000,
		3400000, 3450000, 3500000, 3550000, 3600000,
		};

		static const int ldo1_voltages[] = {
		4300000, 4350000, 4400000, 4450000,
		4500000, 4550000, 4600000, 4650000,
		4700000, 4750000, 4800000, 4850000,
		4900000, 4950000, 5000000, 5050000,
		};

		static const int ldo2_voltages[] = {
		1100000, 1150000, 1200000, 1250000,
		1300000, 1700000, 1750000, 1800000,
		1850000, 1900000, 3150000, 3200000,
		3250000, 3300000, 3350000, 3400000,
		};

		static const int ldo_ilimsel[] = {
		400000, 1500000
		};

		static const int usb_ilimsel[] = {
		200000, 400000, 800000, 1000000
		};

		#define __MK_FIELD(_reg, _mask, _shift) \
		{ .reg = (_reg), .mask = (_mask), .shift = (_shift), }

		static const struct supply_info supply_info[N_REGULATORS] = {
		{
		.name = "DCDC1",
		.flags = FIXED_ILIMSEL,
		.n_voltages = ARRAY_SIZE(dcdc1_voltages),
		.voltages = dcdc1_voltages,
		.fixed_ilimsel = 2400000,
		.enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK,
		DCDCDCDC1_EN_SHIFT),
		.voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK,
		DCDC_VDCDC1_SHIFT),
		},
		{
		.name = "DCDC2",
		.flags = FIXED_ILIMSEL,
		.n_voltages = ARRAY_SIZE(dcdc2_voltages),
		.voltages = dcdc2_voltages,
		.fixed_ilimsel = 1200000,
		.enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK,
		DCDCDCDC2_EN_SHIFT),
		.voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK,
		DCDC_VDCDC2_SHIFT),
		},
		{
		.name = "DCDC3",
		.flags = FIXED_ILIMSEL,
		.n_voltages = ARRAY_SIZE(dcdc3_voltages),
		.voltages = dcdc3_voltages,
		.fixed_ilimsel = 1200000,
		.enable = __MK_FIELD(REG_DCDC_EN, DCDCDCDC_EN_MASK,
		DCDCDCDC3_EN_SHIFT),
		.voltage = __MK_FIELD(REG_DCDC_SET, DCDC_VDCDC_MASK,
		DCDC_VDCDC3_SHIFT),
		},
		{
		.name = "LDO1",
		.n_voltages = ARRAY_SIZE(ldo1_voltages),
		.voltages = ldo1_voltages,
		.n_ilimsels = ARRAY_SIZE(ldo_ilimsel),
		.ilimsels = ldo_ilimsel,
		.enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
		BLOCK_LDO1_SHIFT),
		.voltage = __MK_FIELD(REG_LDO_SET, LDO_VSEL_MASK,
		LDO1_VSEL_SHIFT),
		.ilimsel = __MK_FIELD(REG_LDO_SET, LDO_ILIM_MASK,
		LDO1_ILIM_SHIFT),
		},
		{
		.name = "LDO2",
		.n_voltages = ARRAY_SIZE(ldo2_voltages),
		.voltages = ldo2_voltages,
		.n_ilimsels = ARRAY_SIZE(ldo_ilimsel),
		.ilimsels = ldo_ilimsel,
		.enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
		BLOCK_LDO2_SHIFT),
		.voltage = __MK_FIELD(REG_LDO_SET, LDO_VSEL_MASK,
		LDO2_VSEL_SHIFT),
		.ilimsel = __MK_FIELD(REG_LDO_SET, LDO_ILIM_MASK,
		LDO2_ILIM_SHIFT),
		},
		{
		.name = "USB",
		.flags = FIXED_VOLTAGE,
		.fixed_voltage = 5000000,
		.n_ilimsels = ARRAY_SIZE(usb_ilimsel),
		.ilimsels = usb_ilimsel,
		.enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
		BLOCK_USB_SHIFT),
		.ilimsel = __MK_FIELD(REG_USB, USB_ILIM_MASK,
		USB_ILIM_SHIFT),
		},
		{
		.name = "LCD",
		.flags = FIXED_VOLTAGE \| FIXED_ILIMSEL,
		.fixed_voltage = 5000000,
		.fixed_ilimsel = 400000,
		.enable = __MK_FIELD(REG_BLOCK_EN, BLOCK_MASK,
		BLOCK_LCD_SHIFT),
		},
		};

		static int list_voltage(struct regulator_dev *rdev, unsigned selector)
		{
		const struct supply_info *info;
		struct tps6524x *hw;

		hw = rdev_get_drvdata(rdev);
		info = &supply_info[rdev_get_id(rdev)];

		if (info->flags & FIXED_VOLTAGE)
		return selector ? -EINVAL : info->fixed_voltage;

		return ((selector < info->n_voltages) ?
		info->voltages[selector] : -EINVAL);
		}

		static int set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV,
		unsigned *selector)
		{
		const struct supply_info *info;
		struct tps6524x *hw;
		unsigned i;

		hw = rdev_get_drvdata(rdev);
		info = &supply_info[rdev_get_id(rdev)];

		if (info->flags & FIXED_VOLTAGE)
		return -EINVAL;

		for (i = 0; i < info->n_voltages; i++)
		if (min_uV <= info->voltages[i] &&
		max_uV >= info->voltages[i])
		break;

		if (i >= info->n_voltages)
		i = info->n_voltages - 1;

		*selector = info->voltages[i];

		return write_field(hw, &info->voltage, i);
		}

		static int get_voltage(struct regulator_dev *rdev)
		{
		const struct supply_info *info;
		struct tps6524x *hw;
		int ret;

		hw = rdev_get_drvdata(rdev);
		info = &supply_info[rdev_get_id(rdev)];

		if (info->flags & FIXED_VOLTAGE)
		return info->fixed_voltage;

		ret = read_field(hw, &info->voltage);
		if (ret < 0)
		return ret;
		if (WARN_ON(ret >= info->n_voltages))
		return -EIO;

		return info->voltages[ret];
		}

		static int set_current_limit(struct regulator_dev *rdev, int min_uA,
		int max_uA)
		{
		const struct supply_info *info;
		struct tps6524x *hw;
		int i;

		hw = rdev_get_drvdata(rdev);
		info = &supply_info[rdev_get_id(rdev)];

		if (info->flags & FIXED_ILIMSEL)
		return -EINVAL;

		for (i = 0; i < info->n_ilimsels; i++)
		if (min_uA <= info->ilimsels[i] &&
		max_uA >= info->ilimsels[i])
		break;

		if (i >= info->n_ilimsels)
		return -EINVAL;

		return write_field(hw, &info->ilimsel, i);
		}

		static int get_current_limit(struct regulator_dev *rdev)
		{
		const struct supply_info *info;
		struct tps6524x *hw;
		int ret;

		hw = rdev_get_drvdata(rdev);
		info = &supply_info[rdev_get_id(rdev)];

		if (info->flags & FIXED_ILIMSEL)
		return info->fixed_ilimsel;

		ret = read_field(hw, &info->ilimsel);
		if (ret < 0)
		return ret;
		if (WARN_ON(ret >= info->n_ilimsels))
		return -EIO;

		return info->ilimsels[ret];
		}

		static int enable_supply(struct regulator_dev *rdev)
		{
		const struct supply_info *info;
		struct tps6524x *hw;

		hw = rdev_get_drvdata(rdev);
		info = &supply_info[rdev_get_id(rdev)];

		return write_field(hw, &info->enable, 1);
		}

		static int disable_supply(struct regulator_dev *rdev)
		{
		const struct supply_info *info;
		struct tps6524x *hw;

		hw = rdev_get_drvdata(rdev);
		info = &supply_info[rdev_get_id(rdev)];

		return write_field(hw, &info->enable, 0);
		}

		static int is_supply_enabled(struct regulator_dev *rdev)
		{
		const struct supply_info *info;
		struct tps6524x *hw;

		hw = rdev_get_drvdata(rdev);
		info = &supply_info[rdev_get_id(rdev)];

		return read_field(hw, &info->enable);
		}

		static struct regulator_ops regulator_ops = {
		.is_enabled = is_supply_enabled,
		.enable = enable_supply,
		.disable = disable_supply,
		.get_voltage = get_voltage,
		.set_voltage = set_voltage,
		.list_voltage = list_voltage,
		.set_current_limit = set_current_limit,
		.get_current_limit = get_current_limit,
		};

		static int __devexit pmic_remove(struct spi_device *spi)
		{
		struct tps6524x *hw = spi_get_drvdata(spi);
		int i;

		if (!hw)
		return 0;
		for (i = 0; i < N_REGULATORS; i++) {
		if (hw->rdev[i])
		regulator_unregister(hw->rdev[i]);
		hw->rdev[i] = NULL;
		}
		spi_set_drvdata(spi, NULL);
		kfree(hw);
		return 0;
		}

		static int __devinit pmic_probe(struct spi_device *spi)
		{
		struct tps6524x *hw;
		struct device *dev = &spi->dev;
		const struct supply_info *info = supply_info;
		struct regulator_init_data *init_data;
		int ret = 0, i;

		init_data = dev->platform_data;
		if (!init_data) {
		dev_err(dev, "could not find regulator platform data\n");
		return -EINVAL;
		}

		hw = kzalloc(sizeof(struct tps6524x), GFP_KERNEL);
		if (!hw) {
		dev_err(dev, "cannot allocate regulator private data\n");
		return -ENOMEM;
		}
		spi_set_drvdata(spi, hw);

		memset(hw, 0, sizeof(struct tps6524x));
		hw->dev = dev;
		hw->spi = spi_dev_get(spi);
		mutex_init(&hw->lock);

		for (i = 0; i < N_REGULATORS; i++, info++, init_data++) {
		hw->desc[i].name = info->name;
		hw->desc[i].id = i;
		hw->desc[i].n_voltages = info->n_voltages;
		hw->desc[i].ops = &regulator_ops;
		hw->desc[i].type = REGULATOR_VOLTAGE;
		hw->desc[i].owner = THIS_MODULE;

		if (info->flags & FIXED_VOLTAGE)
		hw->desc[i].n_voltages = 1;

		hw->rdev[i] = regulator_register(&hw->desc[i], dev,
		init_data, hw);
		if (IS_ERR(hw->rdev[i])) {
		ret = PTR_ERR(hw->rdev[i]);
		hw->rdev[i] = NULL;
		goto fail;
		}
		}

		return 0;

		fail:
		pmic_remove(spi);
		return ret;
		}

		static struct spi_driver pmic_driver = {
		.probe = pmic_probe,
		.remove = __devexit_p(pmic_remove),
		.driver = {
		.name = "tps6524x",
		.owner = THIS_MODULE,
		},
		};

		static int __init pmic_driver_init(void)
		{
		return spi_register_driver(&pmic_driver);
		}
		module_init(pmic_driver_init);

		static void __exit pmic_driver_exit(void)
		{
		spi_unregister_driver(&pmic_driver);
		}
		module_exit(pmic_driver_exit);

		MODULE_DESCRIPTION("TPS6524X PMIC Driver");
		MODULE_AUTHOR("Cyril Chemparathy");
		MODULE_LICENSE("GPL");
		MODULE_ALIAS("spi:tps6524x");