diff options
author | Venkat Reddy Talla <vreddytalla@nvidia.com> | 2017-04-12 15:44:36 +0530 |
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committer | Mark Brown <broonie@kernel.org> | 2017-04-12 16:47:50 +0100 |
commit | 77c129bfefc85bae4dbaa655a5d9b75c9c665da9 (patch) | |
tree | 1c6e576a2c592be4d155c99a25f0c7552be3b863 /drivers/regulator | |
parent | d00b74613fb18dfd0a5aa99270ee2e72d5c808d7 (diff) | |
download | linux-77c129bfefc85bae4dbaa655a5d9b75c9c665da9.tar.bz2 |
regulator: tps65132: add regulator driver for TI TPS65132
Add regulator driver for the device TI TPS65132 which is single
inductor - dual output power supply device. TPS65132 device is
designed to support general positive/negative driven applications
like TFT display panels.
TPS65132 regulator driver supports to enable/disable and set voltage
on its output.
Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
-rw-r--r-- | drivers/regulator/Kconfig | 8 | ||||
-rw-r--r-- | drivers/regulator/Makefile | 1 | ||||
-rw-r--r-- | drivers/regulator/tps65132-regulator.c | 285 |
3 files changed, 294 insertions, 0 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 936f7ccc9736..00150c21166d 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -781,6 +781,14 @@ config REGULATOR_TPS65090 This driver provides support for the voltage regulators on the TI TPS65090 PMIC. +config REGULATOR_TPS65132 + tristate "TI TPS65132 Dual Output Power regulators" + depends on I2C && GPIOLIB + select REGMAP_I2C + help + This driver supports TPS65132 single inductor - dual output + power supply specifcally designed for display panels. + config REGULATOR_TPS65217 tristate "TI TPS65217 Power regulators" depends on MFD_TPS65217 diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 14294692beb9..0e9275e78271 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -104,6 +104,7 @@ obj-$(CONFIG_REGULATOR_TPS6586X) += tps6586x-regulator.o obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o obj-$(CONFIG_REGULATOR_TPS65912) += tps65912-regulator.o obj-$(CONFIG_REGULATOR_TPS80031) += tps80031-regulator.o +obj-$(CONFIG_REGULATOR_TPS65132) += tps65132-regulator.o obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o twl6030-regulator.o obj-$(CONFIG_REGULATOR_VEXPRESS) += vexpress-regulator.o obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o diff --git a/drivers/regulator/tps65132-regulator.c b/drivers/regulator/tps65132-regulator.c new file mode 100644 index 000000000000..a949206065d4 --- /dev/null +++ b/drivers/regulator/tps65132-regulator.c @@ -0,0 +1,285 @@ +/* + * TI TPS65132 Regulator driver + * + * Copyright (C) 2017 NVIDIA CORPORATION. All rights reserved. + * + * Author: Venkat Reddy Talla <vreddytalla@nvidia.com> + * 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 "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/delay.h> +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> + +#define TPS65132_REG_VPOS 0x00 +#define TPS65132_REG_VNEG 0x01 +#define TPS65132_REG_APPS_DISP_DISN 0x03 +#define TPS65132_REG_CONTROL 0x0FF + +#define TPS65132_VOUT_MASK 0x1F +#define TPS65132_VOUT_N_VOLTAGE 0x15 +#define TPS65132_VOUT_VMIN 4000000 +#define TPS65132_VOUT_VMAX 6000000 +#define TPS65132_VOUT_STEP 100000 + +#define TPS65132_REG_APPS_DIS_VPOS BIT(0) +#define TPS65132_REG_APPS_DIS_VNEG BIT(1) + +#define TPS65132_REGULATOR_ID_VPOS 0 +#define TPS65132_REGULATOR_ID_VNEG 1 +#define TPS65132_MAX_REGULATORS 2 + +#define TPS65132_ACT_DIS_TIME_SLACK 1000 + +struct tps65132_reg_pdata { + struct gpio_desc *en_gpiod; + struct gpio_desc *act_dis_gpiod; + unsigned int act_dis_time_us; + int ena_gpio_state; +}; + +struct tps65132_regulator { + struct device *dev; + struct regmap *rmap; + struct regulator_desc *rdesc[TPS65132_MAX_REGULATORS]; + struct tps65132_reg_pdata reg_pdata[TPS65132_MAX_REGULATORS]; + struct regulator_dev *rdev[TPS65132_MAX_REGULATORS]; +}; + +static int tps65132_regulator_enable(struct regulator_dev *rdev) +{ + struct tps65132_regulator *tps = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + struct tps65132_reg_pdata *rpdata = &tps->reg_pdata[id]; + int ret; + + if (!IS_ERR(rpdata->en_gpiod)) { + gpiod_set_value_cansleep(rpdata->en_gpiod, 1); + rpdata->ena_gpio_state = 1; + } + + /* Hardware automatically enable discharge bit in enable */ + if (rdev->constraints->active_discharge == + REGULATOR_ACTIVE_DISCHARGE_DISABLE) { + ret = regulator_set_active_discharge_regmap(rdev, false); + if (ret < 0) { + dev_err(tps->dev, "Failed to disable active discharge: %d\n", + ret); + return ret; + } + } + + return 0; +} + +static int tps65132_regulator_disable(struct regulator_dev *rdev) +{ + struct tps65132_regulator *tps = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + struct tps65132_reg_pdata *rpdata = &tps->reg_pdata[id]; + + if (!IS_ERR(rpdata->en_gpiod)) { + gpiod_set_value_cansleep(rpdata->en_gpiod, 0); + rpdata->ena_gpio_state = 0; + } + + if (!IS_ERR(rpdata->act_dis_gpiod)) { + gpiod_set_value_cansleep(rpdata->act_dis_gpiod, 1); + usleep_range(rpdata->act_dis_time_us, rpdata->act_dis_time_us + + TPS65132_ACT_DIS_TIME_SLACK); + gpiod_set_value_cansleep(rpdata->act_dis_gpiod, 0); + } + + return 0; +} + +static int tps65132_regulator_is_enabled(struct regulator_dev *rdev) +{ + struct tps65132_regulator *tps = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + struct tps65132_reg_pdata *rpdata = &tps->reg_pdata[id]; + + if (!IS_ERR(rpdata->en_gpiod)) + return rpdata->ena_gpio_state; + + return 1; +} + +static struct regulator_ops tps65132_regulator_ops = { + .enable = tps65132_regulator_enable, + .disable = tps65132_regulator_disable, + .is_enabled = tps65132_regulator_is_enabled, + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_active_discharge = regulator_set_active_discharge_regmap, +}; + +static int tps65132_of_parse_cb(struct device_node *np, + const struct regulator_desc *desc, + struct regulator_config *config) +{ + struct tps65132_regulator *tps = config->driver_data; + struct tps65132_reg_pdata *rpdata = &tps->reg_pdata[desc->id]; + int ret; + + rpdata->en_gpiod = devm_fwnode_get_index_gpiod_from_child(tps->dev, + "enable", 0, &np->fwnode, 0, "enable"); + if (IS_ERR(rpdata->en_gpiod)) { + ret = PTR_ERR(rpdata->en_gpiod); + + /* Ignore the error other than probe defer */ + if (ret == -EPROBE_DEFER) + return ret; + return 0; + } + + rpdata->act_dis_gpiod = devm_fwnode_get_index_gpiod_from_child( + tps->dev, "active-discharge", 0, + &np->fwnode, 0, "active-discharge"); + if (IS_ERR(rpdata->act_dis_gpiod)) { + ret = PTR_ERR(rpdata->act_dis_gpiod); + + /* Ignore the error other than probe defer */ + if (ret == -EPROBE_DEFER) + return ret; + + return 0; + } + + ret = of_property_read_u32(np, "ti,active-discharge-time-us", + &rpdata->act_dis_time_us); + if (ret < 0) { + dev_err(tps->dev, "Failed to read active discharge time:%d\n", + ret); + return ret; + } + + return 0; +} + +#define TPS65132_REGULATOR_DESC(_id, _name) \ + [TPS65132_REGULATOR_ID_##_id] = { \ + .name = "tps65132-"#_name, \ + .supply_name = "vin", \ + .id = TPS65132_REGULATOR_ID_##_id, \ + .of_match = of_match_ptr(#_name), \ + .of_parse_cb = tps65132_of_parse_cb, \ + .ops = &tps65132_regulator_ops, \ + .n_voltages = TPS65132_VOUT_N_VOLTAGE, \ + .min_uV = TPS65132_VOUT_VMIN, \ + .uV_step = TPS65132_VOUT_STEP, \ + .enable_time = 500, \ + .vsel_mask = TPS65132_VOUT_MASK, \ + .vsel_reg = TPS65132_REG_##_id, \ + .active_discharge_off = 0, \ + .active_discharge_on = TPS65132_REG_APPS_DIS_##_id, \ + .active_discharge_mask = TPS65132_REG_APPS_DIS_##_id, \ + .active_discharge_reg = TPS65132_REG_APPS_DISP_DISN, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + } + +static struct regulator_desc tps_regs_desc[TPS65132_MAX_REGULATORS] = { + TPS65132_REGULATOR_DESC(VPOS, outp), + TPS65132_REGULATOR_DESC(VNEG, outn), +}; + +static const struct regmap_range tps65132_no_reg_ranges[] = { + regmap_reg_range(TPS65132_REG_APPS_DISP_DISN + 1, + TPS65132_REG_CONTROL - 1), +}; + +static const struct regmap_access_table tps65132_no_reg_table = { + .no_ranges = tps65132_no_reg_ranges, + .n_no_ranges = ARRAY_SIZE(tps65132_no_reg_ranges), +}; + +static const struct regmap_config tps65132_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = TPS65132_REG_CONTROL + 1, + .cache_type = REGCACHE_NONE, + .rd_table = &tps65132_no_reg_table, + .wr_table = &tps65132_no_reg_table, +}; + +static int tps65132_probe(struct i2c_client *client, + const struct i2c_device_id *client_id) +{ + struct device *dev = &client->dev; + struct tps65132_regulator *tps; + struct regulator_config config = { }; + int id; + int ret; + + tps = devm_kzalloc(dev, sizeof(*tps), GFP_KERNEL); + if (!tps) + return -ENOMEM; + + tps->rmap = devm_regmap_init_i2c(client, &tps65132_regmap_config); + if (IS_ERR(tps->rmap)) { + ret = PTR_ERR(tps->rmap); + dev_err(dev, "regmap init failed: %d\n", ret); + return ret; + } + + i2c_set_clientdata(client, tps); + tps->dev = dev; + + for (id = 0; id < TPS65132_MAX_REGULATORS; ++id) { + tps->rdesc[id] = &tps_regs_desc[id]; + + config.regmap = tps->rmap; + config.dev = dev; + config.driver_data = tps; + + tps->rdev[id] = devm_regulator_register(dev, + tps->rdesc[id], &config); + if (IS_ERR(tps->rdev[id])) { + ret = PTR_ERR(tps->rdev[id]); + dev_err(dev, "regulator %s register failed: %d\n", + tps->rdesc[id]->name, ret); + return ret; + } + } + return 0; +} + +static const struct i2c_device_id tps65132_id[] = { + {.name = "tps65132",}, + {}, +}; +MODULE_DEVICE_TABLE(i2c, tps65132_id); + +static struct i2c_driver tps65132_i2c_driver = { + .driver = { + .name = "tps65132", + .owner = THIS_MODULE, + }, + .probe = tps65132_probe, + .id_table = tps65132_id, +}; + +module_i2c_driver(tps65132_i2c_driver); + +MODULE_DESCRIPTION("tps65132 regulator driver"); +MODULE_AUTHOR("Venkat Reddy Talla <vreddytalla@nvidia.com>"); +MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); +MODULE_LICENSE("GPL v2"); |