regulator: TPS62360: Add tps62360 regulator driver (6219929f) · Commits · e / devices / android_kernel_oneplus_sm8150

drivers/regulator/Kconfig

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	@@ -328,6 +328,16 @@ config REGULATOR_TPS65910
	help		help
	This driver supports TPS65910 voltage regulator chips.		This driver supports TPS65910 voltage regulator chips.

			config REGULATOR_TPS62360
			tristate "TI TPS62360 Power Regulator"
			depends on I2C
			select REGMAP_I2C
			help
			This driver supports TPS62360 voltage regulator chip. This
			regulator is meant for processor core supply. This chip is
			high-frequency synchronous step down dc-dc converter optimized
			for battery-powered portable applications.

	config REGULATOR_AAT2870		config REGULATOR_AAT2870
	tristate "AnalogicTech AAT2870 Regulators"		tristate "AnalogicTech AAT2870 Regulators"
	depends on MFD_AAT2870_CORE		depends on MFD_AAT2870_CORE

drivers/regulator/Makefile

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	@@ -47,6 +47,7 @@ obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
	obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o		obj-$(CONFIG_REGULATOR_AB8500) += ab8500.o
	obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o		obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
	obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o		obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o
			obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
	obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o		obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o

	ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG		ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG

drivers/regulator/tps62360-regulator.c

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			/*
			* tps62360.c -- TI tps62360
			*
			* Driver for processor core supply tps62360 and tps62361B
			*
			* Copyright (c) 2012, NVIDIA Corporation.
			*
			* Author: Laxman Dewangan <ldewangan@nvidia.com>
			*
			* 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.
			*
			* You should have received a copy of the GNU General Public License
			* along with this program; if not, write to the Free Software
			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
			* 02111-1307, USA
			*/

			#include <linux/kernel.h>
			#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/regulator/tps62360.h>
			#include <linux/gpio.h>
			#include <linux/i2c.h>
			#include <linux/delay.h>
			#include <linux/slab.h>
			#include <linux/regmap.h>

			/* Register definitions */
			#define REG_VSET0 0
			#define REG_VSET1 1
			#define REG_VSET2 2
			#define REG_VSET3 3
			#define REG_CONTROL 4
			#define REG_TEMP 5
			#define REG_RAMPCTRL 6
			#define REG_CHIPID 8

			enum chips {TPS62360, TPS62361};

			#define TPS62360_BASE_VOLTAGE 770
			#define TPS62360_N_VOLTAGES 64

			#define TPS62361_BASE_VOLTAGE 500
			#define TPS62361_N_VOLTAGES 128

			/* tps 62360 chip information */
			struct tps62360_chip {
			const char *name;
			struct device *dev;
			struct regulator_desc desc;
			struct i2c_client *client;
			struct regulator_dev *rdev;
			struct regmap *regmap;
			int chip_id;
			int vsel0_gpio;
			int vsel1_gpio;
			int voltage_base;
			u8 voltage_reg_mask;
			bool en_internal_pulldn;
			bool en_force_pwm;
			bool en_discharge;
			bool valid_gpios;
			int lru_index[4];
			int curr_vset_vsel[4];
			int curr_vset_id;
			};

			/*
			* find_voltage_set_register: Find new voltage configuration register
			* (VSET) id.
			* The finding of the new VSET register will be based on the LRU mechanism.
			* Each VSET register will have different voltage configured . This
			* Function will look if any of the VSET register have requested voltage set
			* or not.
			* - If it is already there then it will make that register as most
			* recently used and return as found so that caller need not to set
			* the VSET register but need to set the proper gpios to select this
			* VSET register.
			* - If requested voltage is not found then it will use the least
			* recently mechanism to get new VSET register for new configuration
			* and will return not_found so that caller need to set new VSET
			* register and then gpios (both).
			*/
			static bool find_voltage_set_register(struct tps62360_chip *tps,
			int req_vsel, int *vset_reg_id)
			{
			int i;
			bool found = false;
			int new_vset_reg = tps->lru_index[3];
			int found_index = 3;
			for (i = 0; i < 4; ++i) {
			if (tps->curr_vset_vsel[tps->lru_index[i]] == req_vsel) {
			new_vset_reg = tps->lru_index[i];
			found_index = i;
			found = true;
			goto update_lru_index;
			}
			}

			update_lru_index:
			for (i = found_index; i > 0; i--)
			tps->lru_index[i] = tps->lru_index[i - 1];

			tps->lru_index[0] = new_vset_reg;
			*vset_reg_id = new_vset_reg;
			return found;
			}

			static int tps62360_dcdc_get_voltage(struct regulator_dev *dev)
			{
			struct tps62360_chip *tps = rdev_get_drvdata(dev);
			int vsel;
			unsigned int data;
			int ret;

			ret = regmap_read(tps->regmap, REG_VSET0 + tps->curr_vset_id, &data);
			if (ret < 0) {
			dev_err(tps->dev, "%s: Error in reading register %d\n",
			__func__, REG_VSET0 + tps->curr_vset_id);
			return ret;
			}
			vsel = (int)data & tps->voltage_reg_mask;
			return (tps->voltage_base + vsel * 10) * 1000;
			}

			static int tps62360_dcdc_set_voltage(struct regulator_dev *dev,
			int min_uV, int max_uV, unsigned *selector)
			{
			struct tps62360_chip *tps = rdev_get_drvdata(dev);
			int vsel;
			int ret;
			bool found = false;
			int new_vset_id = tps->curr_vset_id;

			if (max_uV < min_uV)
			return -EINVAL;

			if (min_uV >
			((tps->voltage_base + (tps->desc.n_voltages - 1) * 10) * 1000))
			return -EINVAL;

			if (max_uV < tps->voltage_base * 1000)
			return -EINVAL;

			vsel = DIV_ROUND_UP(min_uV - (tps->voltage_base * 1000), 10000);
			if (selector)
			*selector = (vsel & tps->voltage_reg_mask);

			/*
			* If gpios are available to select the VSET register then least
			* recently used register for new configuration.
			*/
			if (tps->valid_gpios)
			found = find_voltage_set_register(tps, vsel, &new_vset_id);

			if (!found) {
			ret = regmap_update_bits(tps->regmap, REG_VSET0 + new_vset_id,
			tps->voltage_reg_mask, vsel);
			if (ret < 0) {
			dev_err(tps->dev, "%s: Error in updating register %d\n",
			__func__, REG_VSET0 + new_vset_id);
			return ret;
			}
			tps->curr_vset_id = new_vset_id;
			tps->curr_vset_vsel[new_vset_id] = vsel;
			}

			/* Select proper VSET register vio gpios */
			if (tps->valid_gpios) {
			gpio_set_value_cansleep(tps->vsel0_gpio,
			new_vset_id & 0x1);
			gpio_set_value_cansleep(tps->vsel1_gpio,
			(new_vset_id >> 1) & 0x1);
			}
			return 0;
			}

			static int tps62360_dcdc_list_voltage(struct regulator_dev *dev,
			unsigned selector)
			{
			struct tps62360_chip *tps = rdev_get_drvdata(dev);

			if ((selector < 0) \|\| (selector >= tps->desc.n_voltages))
			return -EINVAL;
			return (tps->voltage_base + selector * 10) * 1000;
			}

			static struct regulator_ops tps62360_dcdc_ops = {
			.get_voltage = tps62360_dcdc_get_voltage,
			.set_voltage = tps62360_dcdc_set_voltage,
			.list_voltage = tps62360_dcdc_list_voltage,
			};

			static int tps62360_init_force_pwm(struct tps62360_chip *tps,
			struct tps62360_regulator_platform_data *pdata,
			int vset_id)
			{
			unsigned int data;
			int ret;
			ret = regmap_read(tps->regmap, REG_VSET0 + vset_id, &data);
			if (ret < 0) {
			dev_err(tps->dev, "%s() fails in writing reg %d\n",
			__func__, REG_VSET0 + vset_id);
			return ret;
			}
			tps->curr_vset_vsel[vset_id] = data & tps->voltage_reg_mask;
			if (pdata->en_force_pwm)
			data \|= BIT(7);
			else
			data &= ~BIT(7);
			ret = regmap_write(tps->regmap, REG_VSET0 + vset_id, data);
			if (ret < 0)
			dev_err(tps->dev, "%s() fails in writing reg %d\n",
			__func__, REG_VSET0 + vset_id);
			return ret;
			}

			static int tps62360_init_dcdc(struct tps62360_chip *tps,
			struct tps62360_regulator_platform_data *pdata)
			{
			int ret;
			int i;

			/* Initailize internal pull up/down control */
			if (tps->en_internal_pulldn)
			ret = regmap_write(tps->regmap, REG_CONTROL, 0xE0);
			else
			ret = regmap_write(tps->regmap, REG_CONTROL, 0x0);
			if (ret < 0) {
			dev_err(tps->dev, "%s() fails in writing reg %d\n",
			__func__, REG_CONTROL);
			return ret;
			}

			/* Initailize force PWM mode */
			if (tps->valid_gpios) {
			for (i = 0; i < 4; ++i) {
			ret = tps62360_init_force_pwm(tps, pdata, i);
			if (ret < 0)
			return ret;
			}
			} else {
			ret = tps62360_init_force_pwm(tps, pdata, tps->curr_vset_id);
			if (ret < 0)
			return ret;
			}

			/* Reset output discharge path to reduce power consumption */
			ret = regmap_update_bits(tps->regmap, REG_RAMPCTRL, BIT(2), 0);
			if (ret < 0)
			dev_err(tps->dev, "%s() fails in updating reg %d\n",
			__func__, REG_RAMPCTRL);
			return ret;
			}

			static const struct regmap_config tps62360_regmap_config = {
			.reg_bits = 8,
			.val_bits = 8,
			};

			static int __devinit tps62360_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
			{
			struct tps62360_regulator_platform_data *pdata;
			struct regulator_dev *rdev;
			struct tps62360_chip *tps;
			int ret;
			int i;

			pdata = client->dev.platform_data;
			if (!pdata) {
			dev_err(&client->dev, "%s() Err: Platform data not found\n",
			__func__);
			return -EIO;
			}

			tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
			if (!tps) {
			dev_err(&client->dev, "%s() Err: Memory allocation fails\n",
			__func__);
			return -ENOMEM;
			}

			tps->en_force_pwm = pdata->en_force_pwm;
			tps->en_discharge = pdata->en_discharge;
			tps->en_internal_pulldn = pdata->en_internal_pulldn;
			tps->vsel0_gpio = pdata->vsel0_gpio;
			tps->vsel1_gpio = pdata->vsel1_gpio;
			tps->client = client;
			tps->dev = &client->dev;
			tps->name = id->name;
			tps->voltage_base = (id->driver_data == TPS62360) ?
			TPS62360_BASE_VOLTAGE : TPS62361_BASE_VOLTAGE;
			tps->voltage_reg_mask = (id->driver_data == TPS62360) ? 0x3F : 0x7F;

			tps->desc.name = id->name;
			tps->desc.id = 0;
			tps->desc.n_voltages = (id->driver_data == TPS62360) ?
			TPS62360_N_VOLTAGES : TPS62361_N_VOLTAGES;
			tps->desc.ops = &tps62360_dcdc_ops;
			tps->desc.type = REGULATOR_VOLTAGE;
			tps->desc.owner = THIS_MODULE;
			tps->regmap = regmap_init_i2c(client, &tps62360_regmap_config);
			if (IS_ERR(tps->regmap)) {
			ret = PTR_ERR(tps->regmap);
			dev_err(&client->dev, "%s() Err: Failed to allocate register"
			"map: %d\n", __func__, ret);
			return ret;
			}
			i2c_set_clientdata(client, tps);

			tps->curr_vset_id = (pdata->vsel1_def_state & 1) * 2 +
			(pdata->vsel0_def_state & 1);
			tps->lru_index[0] = tps->curr_vset_id;
			tps->valid_gpios = false;

			if (gpio_is_valid(tps->vsel0_gpio) && gpio_is_valid(tps->vsel1_gpio)) {
			ret = gpio_request(tps->vsel0_gpio, "tps62360-vsel0");
			if (ret) {
			dev_err(&client->dev,
			"Err: Could not obtain vsel0 GPIO %d: %d\n",
			tps->vsel0_gpio, ret);
			goto err_gpio0;
			}
			ret = gpio_direction_output(tps->vsel0_gpio,
			pdata->vsel0_def_state);
			if (ret) {
			dev_err(&client->dev, "Err: Could not set direction of"
			"vsel0 GPIO %d: %d\n", tps->vsel0_gpio, ret);
			gpio_free(tps->vsel0_gpio);
			goto err_gpio0;
			}

			ret = gpio_request(tps->vsel1_gpio, "tps62360-vsel1");
			if (ret) {
			dev_err(&client->dev,
			"Err: Could not obtain vsel1 GPIO %d: %d\n",
			tps->vsel1_gpio, ret);
			goto err_gpio1;
			}
			ret = gpio_direction_output(tps->vsel1_gpio,
			pdata->vsel1_def_state);
			if (ret) {
			dev_err(&client->dev, "Err: Could not set direction of"
			"vsel1 GPIO %d: %d\n", tps->vsel1_gpio, ret);
			gpio_free(tps->vsel1_gpio);
			goto err_gpio1;
			}
			tps->valid_gpios = true;

			/*
			* Initialize the lru index with vset_reg id
			* The index 0 will be most recently used and
			* set with the tps->curr_vset_id */
			for (i = 0; i < 4; ++i)
			tps->lru_index[i] = i;
			tps->lru_index[0] = tps->curr_vset_id;
			tps->lru_index[tps->curr_vset_id] = 0;
			}

			ret = tps62360_init_dcdc(tps, pdata);
			if (ret < 0) {
			dev_err(tps->dev, "%s() Err: Init fails with = %d\n",
			__func__, ret);
			goto err_init;
			}

			/* Register the regulators */
			rdev = regulator_register(&tps->desc, &client->dev,
			&pdata->reg_init_data, tps, NULL);
			if (IS_ERR(rdev)) {
			dev_err(tps->dev, "%s() Err: Failed to register %s\n",
			__func__, id->name);
			ret = PTR_ERR(rdev);
			goto err_init;
			}

			tps->rdev = rdev;
			return 0;

			err_init:
			if (gpio_is_valid(tps->vsel1_gpio))
			gpio_free(tps->vsel1_gpio);
			err_gpio1:
			if (gpio_is_valid(tps->vsel0_gpio))
			gpio_free(tps->vsel0_gpio);
			err_gpio0:
			regmap_exit(tps->regmap);
			return ret;
			}

			/**
			* tps62360_remove - tps62360 driver i2c remove handler
			* @client: i2c driver client device structure
			*
			* Unregister TPS driver as an i2c client device driver
			*/
			static int __devexit tps62360_remove(struct i2c_client *client)
			{
			struct tps62360_chip *tps = i2c_get_clientdata(client);

			if (gpio_is_valid(tps->vsel1_gpio))
			gpio_free(tps->vsel1_gpio);

			if (gpio_is_valid(tps->vsel0_gpio))
			gpio_free(tps->vsel0_gpio);

			regulator_unregister(tps->rdev);
			regmap_exit(tps->regmap);
			return 0;
			}

			static void tps62360_shutdown(struct i2c_client *client)
			{
			struct tps62360_chip *tps = i2c_get_clientdata(client);
			int st;

			if (!tps->en_discharge)
			return;

			/* Configure the output discharge path */
			st = regmap_update_bits(tps->regmap, REG_RAMPCTRL, BIT(2), BIT(2));
			if (st < 0)
			dev_err(tps->dev, "%s() fails in updating reg %d\n",
			__func__, REG_RAMPCTRL);
			}

			static const struct i2c_device_id tps62360_id[] = {
			{.name = "tps62360", .driver_data = TPS62360},
			{.name = "tps62361", .driver_data = TPS62361},
			{},
			};

			MODULE_DEVICE_TABLE(i2c, tps62360_id);

			static struct i2c_driver tps62360_i2c_driver = {
			.driver = {
			.name = "tps62360",
			.owner = THIS_MODULE,
			},
			.probe = tps62360_probe,
			.remove = __devexit_p(tps62360_remove),
			.shutdown = tps62360_shutdown,
			.id_table = tps62360_id,
			};

			static int __init tps62360_init(void)
			{
			return i2c_add_driver(&tps62360_i2c_driver);
			}
			subsys_initcall(tps62360_init);

			static void __exit tps62360_cleanup(void)
			{
			i2c_del_driver(&tps62360_i2c_driver);
			}
			module_exit(tps62360_cleanup);

			MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
			MODULE_DESCRIPTION("TPS62360 voltage regulator driver");
			MODULE_LICENSE("GPL v2");

include/linux/regulator/tps62360.h

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			/*
			* tps62360.h -- TI tps62360
			*
			* Interface for regulator driver for TI TPS62360 Processor core supply
			*
			* Copyright (C) 2012 NVIDIA Corporation

			* Author: Laxman Dewangan <ldewangan@nvidia.com>
			*
			* 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.
			*
			* This program is distributed in the hope that it will be useful, but WITHOUT
			* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
			* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
			* more details.
			*
			* You should have received a copy of the GNU General Public License along
			* with this program; if not, write to the Free Software Foundation, Inc.,
			* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
			*
			*/

			#ifndef __LINUX_REGULATOR_TPS62360_H
			#define __LINUX_REGULATOR_TPS62360_H

			#include <linux/regulator/machine.h>

			/*
			* struct tps62360_regulator_platform_data - tps62360 regulator platform data.
			*
			* @reg_init_data: The regulator init data.
			* @en_force_pwm: Enable force pwm or not.
			* @en_discharge: Enable discharge the output capacitor via internal
			* register.
			* @en_internal_pulldn: internal pull down enable or not.
			* @vsel0_gpio: Gpio number for vsel0. It should be -1 if this is tied with
			* fixed logic.
			* @vsel1_gpio: Gpio number for vsel1. It should be -1 if this is tied with
			* fixed logic.
			* @vsel0_def_state: Default state of vsel0. 1 if it is high else 0.
			* @vsel1_def_state: Default state of vsel1. 1 if it is high else 0.
			*/
			struct tps62360_regulator_platform_data {
			struct regulator_init_data reg_init_data;
			bool en_force_pwm;
			bool en_discharge;
			bool en_internal_pulldn;
			int vsel0_gpio;
			int vsel1_gpio;
			int vsel0_def_state;
			int vsel1_def_state;
			};

			#endif /* __LINUX_REGULATOR_TPS62360_H */