v2: Added 'compatible' attribute in the driver Added message for exception or errors. --- drivers/regulator/Kconfig | 11 +++ drivers/regulator/Makefile | 1 + drivers/regulator/sky81452-regulator.c | 140 +++++++++++++++++++++++++++++++++ 3 files changed, 152 insertions(+) create mode 100644 drivers/regulator/sky81452-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 2dc8289..2b05964 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -483,6 +483,17 @@ config REGULATOR_S5M8767 via I2C bus. S5M8767A have 9 Bucks and 28 LDOs output and supports DVS mode with 8bits of output voltage control. +config REGULATOR_SKY81452 + tristate "Skyworks Solutions SKY81452 voltage regulator" + depends on MFD_SKY81452 + help + This driver supports Skyworks SKY81452 voltage output regulator + via I2C bus. SKY81452 has one voltage linear regulator can be + programmed from 4.5V to 20V. + + This driver can also be built as a module. If so, the module + will be called sky81452-regulator. + config REGULATOR_ST_PWM tristate "STMicroelectronics PWM voltage regulator" depends on ARCH_STI diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index aa4a6aa..d8206ec 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -65,6 +65,7 @@ obj-$(CONFIG_REGULATOR_RC5T583) += rc5t583-regulator.o obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o +obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o obj-$(CONFIG_REGULATOR_ST_PWM) += st-pwm.o obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o diff --git a/drivers/regulator/sky81452-regulator.c b/drivers/regulator/sky81452-regulator.c new file mode 100644 index 0000000..b9c54c6 --- /dev/null +++ b/drivers/regulator/sky81452-regulator.c @@ -0,0 +1,140 @@ +/* + * sky81452-regulator.c SKY81452 regulator driver + * + * Copyright 2014 Skyworks Solutions Inc. + * Author : Gyungoh Yoo <jack.yoo@xxxxxxxxxxxxxxx> + * + * 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, 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, see <http://www.gnu.org/licenses/>. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/of_regulator.h> + +/* registers */ +#define SKY81452_REG1 0x01 +#define SKY81452_REG3 0x03 + +/* bit mask */ +#define SKY81452_LEN 0x40 +#define SKY81452_LOUT 0x1F + +static struct regulator_ops sky81452_reg_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, +}; + +static const struct regulator_linear_range sky81452_reg_ranges[] = { + REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000), + REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000), +}; + +static const struct regulator_desc sky81452_reg = { + .name = "LOUT", + .ops = &sky81452_reg_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .n_voltages = SKY81452_LOUT + 1, + .linear_ranges = sky81452_reg_ranges, + .n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges), + .vsel_reg = SKY81452_REG3, + .vsel_mask = SKY81452_LOUT, + .enable_reg = SKY81452_REG1, + .enable_mask = SKY81452_LEN, +}; + +#ifdef CONFIG_OF +static struct regulator_init_data *sky81452_reg_parse_dt(struct device *dev) +{ + struct regulator_init_data *init_data; + struct device_node *np = of_node_get(dev->of_node); + + if (!np) { + dev_err(dev, "regulator node not found"); + return ERR_PTR(-ENODATA); + } + + init_data = of_get_regulator_init_data(dev, np); + + of_node_put(np); + return init_data; +} +#else +static struct regulator_init_data *sky81452_reg_parse_dt(struct device *dev) +{ + return ERR_PTR(-EINVAL); +} +#endif + +static int sky81452_reg_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const struct regulator_init_data *init_data = dev_get_platdata(dev); + struct regulator_config config = { }; + struct regulator_dev *rdev; + + if (!init_data) { + init_data = sky81452_reg_parse_dt(dev); + if (IS_ERR(init_data)) + return PTR_ERR(init_data); + } + + config.dev = dev; + config.init_data = init_data; + config.of_node = dev->of_node; + config.regmap = dev_get_drvdata(dev->parent); + + rdev = devm_regulator_register(dev, &sky81452_reg, &config); + if (IS_ERR(rdev)) { + dev_err(dev, "failed to register regulator:%d", PTR_ERR(rdev)); + return PTR_ERR(rdev); + } + + platform_set_drvdata(pdev, rdev); + + return 0; +} + +#ifdef CONFIG_OF +static const struct of_device_id sky81452_reg_of_match[] = { + { .compatible = "skyworks,sky81452-regulator", }, + { } +}; +MODULE_DEVICE_TABLE(of, sky81452_reg_of_match); +#endif + +static struct platform_driver sky81452_reg_driver = { + .driver = { + .name = "sky81452-regulator", + .of_match_table = of_match_ptr(sky81452_reg_of_match), + }, + .probe = sky81452_reg_probe, +}; + +module_platform_driver(sky81452_reg_driver); + +MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver"); +MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@xxxxxxxxxxxxxxx>"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("1.1"); -- 1.9.1 -- 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
