This patch adds support for TPS65218 PMIC regulators. The regulators set consists of 6 DCDCs and 1 LDO. The output voltages are configurable and are meant to supply power to the main processor and other components. Signed-off-by: Keerthy <j-keerthy@xxxxxx> --- drivers/regulator/Kconfig | 9 + drivers/regulator/Makefile | 1 + drivers/regulator/tps65218-regulator.c | 393 ++++++++++++++++++++++++++++++++ 3 files changed, 403 insertions(+) create mode 100644 drivers/regulator/tps65218-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index ce785f4..42f94eb 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -498,6 +498,15 @@ config REGULATOR_TPS65217 voltage regulators. It supports software based voltage control for different voltage domains +config REGULATOR_TPS65218 + tristate "TI TPS65218 Power regulators" + depends on MFD_TPS65218 + help + This driver supports TPS65218 voltage regulator chips. TPS65218 + provides six step-down converters and one general-purpose LDO + voltage regulators. It supports software based voltage control + for different voltage domains + config REGULATOR_TPS6524X tristate "TI TPS6524X Power regulators" depends on SPI diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 01c597e..dfbfdf9 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -65,6 +65,7 @@ obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o obj-$(CONFIG_REGULATOR_TPS65090) += tps65090-regulator.o obj-$(CONFIG_REGULATOR_TPS65217) += tps65217-regulator.o +obj-$(CONFIG_REGULATOR_TPS65218) += tps65218-regulator.o obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o obj-$(CONFIG_REGULATOR_TPS6586X) += tps6586x-regulator.o obj-$(CONFIG_REGULATOR_TPS65910) += tps65910-regulator.o diff --git a/drivers/regulator/tps65218-regulator.c b/drivers/regulator/tps65218-regulator.c new file mode 100644 index 0000000..4989c83 --- /dev/null +++ b/drivers/regulator/tps65218-regulator.c @@ -0,0 +1,393 @@ +/* + * tps65218-regulator.c + * + * Regulator driver for TPS65218 PMIC + * + * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/ + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether expressed or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License version 2 for more details. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/of_device.h> +#include <linux/regulator/of_regulator.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/mfd/tps65218.h> + +static unsigned int tps65218_ramp_delay = 4000; + +#define TPS65218_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _er, _em, _t) \ + { \ + .name = _name, \ + .id = _id, \ + .ops = &_ops, \ + .n_voltages = _n, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .vsel_reg = _vr, \ + .vsel_mask = _vm, \ + .enable_reg = _er, \ + .enable_mask = _em, \ + .volt_table = _t, \ + } \ + +#define TPS65218_INFO(_id, _nm, _min, _max, _f1, _f2) \ + { \ + .id = _id, \ + .name = _nm, \ + .min_uV = _min, \ + .max_uV = _max, \ + .vsel_to_uv = _f1, \ + .uv_to_vsel = _f2, \ + } + +static int tps65218_ldo1_dcdc3_vsel_to_uv(unsigned int vsel) +{ + int uV = 0; + + if (vsel <= 26) + uV = vsel * 25000 + 900000; + else + uV = (vsel - 26) * 50000 + 1550000; + + return uV; +} + +static int tps65218_ldo1_dcdc3_uv_to_vsel(int uV, unsigned int *vsel) +{ + if (uV <= 1550000) + *vsel = DIV_ROUND_UP(uV - 900000, 25000); + else + *vsel = 26 + DIV_ROUND_UP(uV - 1550000, 50000); + + return 0; +} + +static int tps65218_dcdc1_2_vsel_to_uv(unsigned int vsel) +{ + int uV = 0; + + if (vsel <= 50) + uV = vsel * 10000 + 850000; + else + uV = (vsel - 50) * 25000 + 1350000; + + return uV; +} + +static int tps65218_dcdc1_2_uv_to_vsel(int uV, unsigned int *vsel) +{ + if (uV <= 1350000) + *vsel = DIV_ROUND_UP(uV - 850000, 10000); + else + *vsel = 50 + DIV_ROUND_UP(uV - 1350000, 25000); + + return 0; +} + +static int tps65218_dcd4_vsel_to_uv(unsigned int vsel) +{ + int uV = 0; + + if (vsel <= 15) + uV = vsel * 25000 + 1175000; + else + uV = (vsel - 15) * 50000 + 1550000; + + return uV; +} + +static int tps65218_dcdc4_uv_to_vsel(int uV, unsigned int *vsel) +{ + if (uV <= 1550000) + *vsel = DIV_ROUND_UP(uV - 1175000, 25000); + else + *vsel = 15 + DIV_ROUND_UP(uV - 1550000, 50000); + + return 0; +} + +static struct tps_info tps65218_pmic_regs[] = { + TPS65218_INFO(0, "DCDC1", 850000, 1675000, tps65218_dcdc1_2_vsel_to_uv, + tps65218_dcdc1_2_uv_to_vsel), + TPS65218_INFO(1, "DCDC2", 850000, 1675000, tps65218_dcdc1_2_vsel_to_uv, + tps65218_dcdc1_2_uv_to_vsel), + TPS65218_INFO(2, "DCDC3", 900000, 3400000, + tps65218_ldo1_dcdc3_vsel_to_uv, + tps65218_ldo1_dcdc3_uv_to_vsel), + TPS65218_INFO(3, "DCDC4", 1175000, 3400000, tps65218_dcd4_vsel_to_uv, + tps65218_dcdc4_uv_to_vsel), + TPS65218_INFO(4, "DCDC5", 1000000, 1000000, NULL, NULL), + TPS65218_INFO(5, "DCDC6", 1800000, 1800000, NULL, NULL), + TPS65218_INFO(6, "LDO1", 900000, 3400000, + tps65218_ldo1_dcdc3_vsel_to_uv, + tps65218_ldo1_dcdc3_uv_to_vsel), +}; + +#define TPS65218_OF_MATCH(comp, label) \ + { \ + .compatible = comp, \ + .data = &label, \ + } + +static const struct of_device_id tps65218_of_match[] = { + TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[0]), + TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[1]), + TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[2]), + TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[3]), + TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[4]), + TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[5]), + TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[6]), +}; +MODULE_DEVICE_TABLE(of, tps65218_of_match); + +static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, + unsigned selector) +{ + int ret; + struct tps65218 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + /* Set the voltage based on vsel value and write protect level is 2 */ + ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, + selector, TPS65218_PROTECT_L1); + + /* Set GO bit for DCDC1/2 to initiate voltage transistion */ + switch (rid) { + case TPS65218_DCDC_1: + case TPS65218_DCDC_2: + ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, + TPS65218_SLEW_RATE_GO, + TPS65218_SLEW_RATE_GO, + TPS65218_PROTECT_L1); + break; + } + + return ret; +} + +static int tps65218_pmic_map_voltage(struct regulator_dev *dev, + int min_uV, int max_uV) +{ + struct tps65218 *tps = rdev_get_drvdata(dev); + unsigned int sel, rid = rdev_get_id(dev); + int ret; + + if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) + return -EINVAL; + + if (min_uV < tps->info[rid]->min_uV) + min_uV = tps->info[rid]->min_uV; + + if (max_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV) + return -EINVAL; + + ret = tps->info[rid]->uv_to_vsel(min_uV, &sel); + if (ret) + return ret; + + return sel; +} + +static int tps65218_pmic_list_voltage(struct regulator_dev *dev, + unsigned selector) +{ + struct tps65218 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) + return -EINVAL; + + if (selector >= dev->desc->n_voltages) + return -EINVAL; + + return tps->info[rid]->vsel_to_uv(selector); +} + +static int tps65218_pmic_enable(struct regulator_dev *dev) +{ + struct tps65218 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) + return -EINVAL; + + /* Enable the regulator and password protection is level 1 */ + return tps65218_set_bits(tps, dev->desc->enable_reg, + dev->desc->enable_mask, dev->desc->enable_mask, + TPS65218_PROTECT_L1); +} + +static int tps65218_pmic_disable(struct regulator_dev *dev) +{ + struct tps65218 *tps = rdev_get_drvdata(dev); + unsigned int rid = rdev_get_id(dev); + + if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) + return -EINVAL; + + /* Disable the regulator and password protection is level 1 */ + return tps65218_clear_bits(tps, dev->desc->enable_reg, + dev->desc->enable_mask, TPS65218_PROTECT_L1); +} + +static int tps65218_set_voltage_time_sel(struct regulator_dev *rdev, + unsigned int old_selector, unsigned int new_selector) +{ + int old_uv, new_uv; + + old_uv = tps65218_pmic_list_voltage(rdev, old_selector); + if (old_uv < 0) + return old_uv; + + new_uv = tps65218_pmic_list_voltage(rdev, new_selector); + if (new_uv < 0) + return new_uv; + + return DIV_ROUND_UP(abs(old_uv - new_uv), tps65218_ramp_delay); +} + +/* Operations permitted on DCDC1, DCDC2 */ +static struct regulator_ops tps65218_dcdc12_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65218_pmic_enable, + .disable = tps65218_pmic_disable, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = tps65218_pmic_set_voltage_sel, + .list_voltage = tps65218_pmic_list_voltage, + .map_voltage = tps65218_pmic_map_voltage, + .set_voltage_time_sel = tps65218_set_voltage_time_sel, +}; + +/* Operations permitted on DCDC3, DCDC4 and LDO1 */ +static struct regulator_ops tps65218_ldo1_dcdc34_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65218_pmic_enable, + .disable = tps65218_pmic_disable, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = tps65218_pmic_set_voltage_sel, + .list_voltage = tps65218_pmic_list_voltage, + .map_voltage = tps65218_pmic_map_voltage, +}; + +/* Operations permitted on DCDC5, DCDC6 */ +static struct regulator_ops tps65218_dcdc56_pmic_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = tps65218_pmic_enable, + .disable = tps65218_pmic_disable, +}; + +static const struct regulator_desc regulators[] = { + TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64, + TPS65218_REG_CONTROL_DCDC1, + TPS65218_CONTROL_DCDC1_MASK, + TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN, NULL), + TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64, + TPS65218_REG_CONTROL_DCDC2, + TPS65218_CONTROL_DCDC2_MASK, + TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN, NULL), + TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops, + 64, TPS65218_REG_CONTROL_DCDC3, + TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, + TPS65218_ENABLE1_DC3_EN, NULL), + TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, tps65218_ldo1_dcdc34_ops, + 53, TPS65218_REG_CONTROL_DCDC4, + TPS65218_CONTROL_DCDC4_MASK, + TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC4_EN, NULL), + TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, tps65218_dcdc56_pmic_ops, + 1, -1, -1, TPS65218_REG_ENABLE1, + TPS65218_ENABLE1_DC5_EN, NULL), + TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops, + 1, -1, -1, TPS65218_REG_ENABLE1, + TPS65218_ENABLE1_DC6_EN, NULL), + TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, tps65218_ldo1_dcdc34_ops, 64, + TPS65218_REG_CONTROL_LDO1, + TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, + TPS65218_ENABLE2_LDO1_EN, NULL), +}; + +static int tps65218_regulator_probe(struct platform_device *pdev) +{ + struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); + struct regulator_init_data *init_data; + const struct tps_info *template; + struct regulator_dev *rdev; + const struct of_device_id *match; + struct regulator_config config = { }; + int id; + + match = of_match_device(tps65218_of_match, &pdev->dev); + if (match) { + template = match->data; + id = template->id; + init_data = of_get_regulator_init_data(&pdev->dev, + pdev->dev.of_node); + } else { + return -ENODEV; + } + + platform_set_drvdata(pdev, tps); + + tps->info[id] = &tps65218_pmic_regs[id]; + config.dev = &pdev->dev; + config.init_data = init_data; + config.driver_data = tps; + config.regmap = tps->regmap; + config.of_node = pdev->dev.of_node; + + rdev = regulator_register(®ulators[id], &config); + if (IS_ERR(rdev)) { + dev_err(tps->dev, "failed to register %s regulator\n", + pdev->name); + return PTR_ERR(rdev); + } + + /* Save regulator */ + tps->rdev[id] = rdev; + + return 0; +} + +static int tps65218_regulator_remove(struct platform_device *pdev) +{ + struct tps65218 *tps = platform_get_drvdata(pdev); + const struct of_device_id *match; + const struct tps_info *template; + + match = of_match_device(tps65218_of_match, &pdev->dev); + template = match->data; + regulator_unregister(tps->rdev[template->id]); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static struct platform_driver tps65218_regulator_driver = { + .driver = { + .name = "tps65218-pmic", + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(tps65218_of_match), + }, + .probe = tps65218_regulator_probe, + .remove = tps65218_regulator_remove, +}; + +module_platform_driver(tps65218_regulator_driver); + +MODULE_AUTHOR("J Keerthy <j-keerthy@xxxxxx>"); +MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); +MODULE_ALIAS("platform:tps65218-pmic"); +MODULE_LICENSE("GPL v2"); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
