From: Wang Xiaoyin <hw.wangxiaoyin@xxxxxxxxxxxxx> add the driver for hi6421v530 voltage regulator Signed-off-by: Wang Xiaoyin <hw.wangxiaoyin@xxxxxxxxxxxxx> Signed-off-by: Guodong Xu <guodong.xu@xxxxxxxxxx> --- drivers/regulator/Kconfig | 10 + drivers/regulator/Makefile | 1 + drivers/regulator/hi6421v530-regulator.c | 355 +++++++++++++++++++++++++++++++ 3 files changed, 366 insertions(+) create mode 100644 drivers/regulator/hi6421v530-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 48db87d..c389ce8 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -296,6 +296,16 @@ config REGULATOR_HI6421 21 general purpose LDOs, 3 dedicated LDOs, and 5 BUCKs. All of them come with support to either ECO (idle) or sleep mode. +config REGULATOR_HI6421V530 + tristate "HiSilicon Hi6421v530 PMIC voltage regulator support" + depends on MFD_HI6421V530_PMIC && OF + help + This driver provides support for the voltage regulators on + HiSilicon Hi6421v530 PMU / Codec IC. + Hi6421v530 is a multi-function device which, on regulator part, + provides 5 general purpose LDOs, and all of them come with support + to either ECO (idle) or sleep mode. + config REGULATOR_HI655X tristate "Hisilicon HI655X PMIC regulators support" depends on ARCH_HISI || COMPILE_TEST diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index dc3503f..36e2b75 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -38,6 +38,7 @@ obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o obj-$(CONFIG_REGULATOR_GPIO) += gpio-regulator.o obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o +obj-$(CONFIG_REGULATOR_HI6421V530) += hi6421v530-regulator.o obj-$(CONFIG_REGULATOR_HI655X) += hi655x-regulator.o obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o obj-$(CONFIG_REGULATOR_ISL9305) += isl9305.o diff --git a/drivers/regulator/hi6421v530-regulator.c b/drivers/regulator/hi6421v530-regulator.c new file mode 100644 index 0000000..82854d0 --- /dev/null +++ b/drivers/regulator/hi6421v530-regulator.c @@ -0,0 +1,355 @@ +/* + * Device driver for regulators in Hi6421V530 IC + * + * Copyright (c) <2017> HiSilicon Technologies Co., Ltd. + * http://www.hisilicon.com + * Copyright (c) <2017> Linaro Ltd. + * http://www.linaro.org + * + * Author: Wang Xiaoyin <hw.wangxiaoyin@xxxxxxxxxxxxx> + * + * 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. + */ + +#include <linux/slab.h> +#include <linux/device.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/of_regulator.h> +#include <linux/mfd/hi6421-pmic.h> +#include <linux/io.h> + +/* + * struct hi6421c530_regulator_pdata - Hi6421V530 regulator data + * of platform device. + * @lock: mutex to serialize regulator enable + */ +struct hi6421v530_regulator_pdata { + struct mutex lock; +}; + +/* + * struct hi6421v530_regulator_info - hi6421v530 regulator information + * @desc: regulator description + * @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep + * @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only + */ +struct hi6421v530_regulator_info { + struct regulator_desc desc; + u8 mode_mask; + u32 eco_microamp; +}; + +/* HI6421v530 regulators */ +enum hi6421v530_regulator_id { + HI6421V530_LDO3, + HI6421V530_LDO9, + HI6421V530_LDO11, + HI6421V530_LDO15, + HI6421V530_LDO16, + HI6421V530_NUM_REGULATORS, +}; + +#define HI6421V530_REGULATOR_OF_MATCH(_name, id) \ +{ \ + .name = #_name, \ + .driver_data = (void *) HI6421V530_##id, \ +} + +static struct of_regulator_match hi6421v530_regulator_match[] = { + HI6421V530_REGULATOR_OF_MATCH(hi6421v530_ldo3, LDO3), + HI6421V530_REGULATOR_OF_MATCH(hi6421v530_ldo9, LDO9), + HI6421V530_REGULATOR_OF_MATCH(hi6421v530_ldo11, LDO11), + HI6421V530_REGULATOR_OF_MATCH(hi6421v530_ldo15, LDO15), + HI6421V530_REGULATOR_OF_MATCH(hi6421v530_ldo16, LDO16), +}; + +static const unsigned int ldo_3_voltages[] = { + 1800000, 1825000, 1850000, 1875000, + 1900000, 1925000, 1950000, 1975000, + 2000000, 2025000, 2050000, 2075000, + 2100000, 2125000, 2150000, 2200000, +}; + +static const unsigned int ldo_9_11_voltages[] = { + 1750000, 1800000, 1825000, 2800000, + 2850000, 2950000, 3000000, 3300000, +}; + +static const unsigned int ldo_15_16_voltages[] = { + 1750000, 1800000, 2400000, 2600000, + 2700000, 2850000, 2950000, 3000000, +}; + +static const struct regulator_ops hi6421v530_ldo_ops; + +#define HI6421V530_LDO_ENABLE_TIME (350) + +/* + * _id - LDO id name string + * v_table - voltage table + * vreg - voltage select register + * vmask - voltage select mask + * ereg - enable register + * emask - enable mask + * odelay - off/on delay time in uS + * ecomask - eco mode mask + * ecoamp - eco mode load uppler limit in uA + */ +#define HI6421V530_LDO(_id, v_table, vreg, vmask, ereg, emask, \ + odelay, ecomask, ecoamp) \ + [HI6421V530_##_id] = { \ + .desc = { \ + .name = #_id, \ + .ops = &hi6421v530_ldo_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = HI6421V530_##_id, \ + .owner = THIS_MODULE, \ + .n_voltages = ARRAY_SIZE(v_table), \ + .volt_table = v_table, \ + .vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \ + .vsel_mask = vmask, \ + .enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \ + .enable_mask = emask, \ + .enable_time = HI6421V530_LDO_ENABLE_TIME, \ + .off_on_delay = odelay, \ + }, \ + .mode_mask = ecomask, \ + .eco_microamp = ecoamp, \ + } + +/* HI6421V530 regulator information */ + +static struct hi6421v530_regulator_info + hi6421v530_regulator_info[HI6421V530_NUM_REGULATORS] = { + HI6421V530_LDO(LDO3, ldo_3_voltages, 0x061, 0xf, 0x060, 0x2, + 20000, 0x6, 8000), + HI6421V530_LDO(LDO9, ldo_9_11_voltages, 0x06b, 0x7, 0x06a, 0x2, + 40000, 0x6, 8000), + HI6421V530_LDO(LDO11, ldo_9_11_voltages, 0x06f, 0x7, 0x06e, 0x2, + 40000, 0x6, 8000), + HI6421V530_LDO(LDO15, ldo_15_16_voltages, 0x077, 0x7, 0x076, 0x2, + 40000, 0x6, 8000), + HI6421V530_LDO(LDO16, ldo_15_16_voltages, 0x079, 0x7, 0x078, 0x2, + 40000, 0x6, 8000), +}; + +static int hi6421v530_regulator_enable(struct regulator_dev *rdev) +{ + struct hi6421v530_regulator_pdata *pdata; + int ret = 0; + + pdata = dev_get_drvdata(rdev->dev.parent); + mutex_lock(&pdata->lock); + + ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, + 1 << (ffs(rdev->desc->enable_mask) - 1)); + + mutex_unlock(&pdata->lock); + return ret; +} + +static int hi6421v530_regulator_disable(struct regulator_dev *rdev) +{ + struct hi6421v530_regulator_pdata *pdata; + int ret = 0; + + pdata = dev_get_drvdata(rdev->dev.parent); + mutex_lock(&pdata->lock); + + ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, 0); + + mutex_unlock(&pdata->lock); + return ret; +} + +static int hi6421v530_regulator_is_enabled(struct regulator_dev *rdev) +{ + unsigned int reg_val = 0; + int ret = 0; + + regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val); + + ret = (reg_val & (rdev->desc->enable_mask)) ? 1 : 0; + return ret; +} + +static int hi6421v530_regulator_set_voltage(struct regulator_dev *rdev, + unsigned int sel) +{ + struct hi6421v530_regulator_pdata *pdata; + int ret = 0; + + pdata = dev_get_drvdata(rdev->dev.parent); + mutex_lock(&pdata->lock); + + ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg, + rdev->desc->vsel_mask, + sel << (ffs(rdev->desc->vsel_mask) - 1)); + + mutex_unlock(&pdata->lock); + return ret; +} + +static int hi6421v530_regulator_get_voltage(struct regulator_dev *rdev) +{ + unsigned int reg_val = 0; + int voltage; + + regmap_read(rdev->regmap, rdev->desc->vsel_reg, ®_val); + + voltage = reg_val >> (ffs(rdev->desc->vsel_mask) - 1); + return voltage; +} + +static unsigned int hi6421v530_regulator_ldo_get_mode( + struct regulator_dev *rdev) +{ + struct hi6421v530_regulator_info *info; + unsigned int reg_val; + + info = rdev_get_drvdata(rdev); + regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val); + + if (reg_val & (info->mode_mask)) + return REGULATOR_MODE_IDLE; + + return REGULATOR_MODE_NORMAL; +} + +static int hi6421v530_regulator_ldo_set_mode(struct regulator_dev *rdev, + unsigned int mode) +{ + struct hi6421v530_regulator_info *info; + struct hi6421v530_regulator_pdata *pdata; + unsigned int new_mode; + + info = rdev_get_drvdata(rdev); + pdata = dev_get_drvdata(rdev->dev.parent); + switch (mode) { + case REGULATOR_MODE_NORMAL: + new_mode = 0; + break; + case REGULATOR_MODE_IDLE: + new_mode = info->mode_mask; + break; + default: + return -EINVAL; + } + + mutex_lock(&pdata->lock); + regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + info->mode_mask, new_mode); + mutex_unlock(&pdata->lock); + + return 0; +} + + +static const struct regulator_ops hi6421v530_ldo_ops = { + .is_enabled = hi6421v530_regulator_is_enabled, + .enable = hi6421v530_regulator_enable, + .disable = hi6421v530_regulator_disable, + .list_voltage = regulator_list_voltage_table, + .map_voltage = regulator_map_voltage_ascend, + .get_voltage_sel = hi6421v530_regulator_get_voltage, + .set_voltage_sel = hi6421v530_regulator_set_voltage, + .get_mode = hi6421v530_regulator_ldo_get_mode, + .set_mode = hi6421v530_regulator_ldo_set_mode, +}; + +static int hi6421v530_regulator_register(struct platform_device *pdev, + struct regmap *rmap, + struct regulator_init_data *init_data, + int id, struct device_node *np) +{ + struct hi6421v530_regulator_info *info = NULL; + struct regulator_config config = { }; + struct regulator_dev *rdev; + + /* assign per-regulator data */ + info = &hi6421v530_regulator_info[id]; + + config.dev = &pdev->dev; + config.init_data = init_data; + config.driver_data = info; + config.regmap = rmap; + config.of_node = np; + + /* register regulator with framework */ + rdev = devm_regulator_register(&pdev->dev, &info->desc, &config); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, "failed to register regulator %s\n", + info->desc.name); + return PTR_ERR(rdev); + } + + rdev->constraints->valid_modes_mask = info->mode_mask; + rdev->constraints->valid_ops_mask |= + REGULATOR_CHANGE_VOLTAGE | REGULATOR_CHANGE_MODE; + + return 0; +} + +static int hi6421v530_regulator_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct device_node *np; + struct hi6421_pmic *pmic; + struct hi6421v530_regulator_pdata *pdata; + int i, ret = 0; + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return -ENOMEM; + mutex_init(&pdata->lock); + + platform_set_drvdata(pdev, pdata); + + np = of_get_child_by_name(dev->parent->of_node, "regulators"); + if (!np) + return -ENODEV; + + ret = of_regulator_match(dev, np, + hi6421v530_regulator_match, + ARRAY_SIZE(hi6421v530_regulator_match)); + of_node_put(np); + if (ret < 0) { + dev_err(dev, "Error parsing regulator init data: %d\n", ret); + return ret; + } + + pmic = dev_get_drvdata(dev->parent); + + for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_match); i++) { + ret = hi6421v530_regulator_register(pdev, pmic->regmap, + hi6421v530_regulator_match[i].init_data, i, + hi6421v530_regulator_match[i].of_node); + + if (ret) + return ret; + } + + return 0; +} + +static struct platform_driver hi6421v530_regulator_driver = { + .driver = { + .name = "hi6421v530-regulator", + }, + .probe = hi6421v530_regulator_probe, +}; +module_platform_driver(hi6421v530_regulator_driver); + +MODULE_AUTHOR("Wang Xiaoyin <hw.wangxiaoyin@xxxxxxxxxxxxx>"); +MODULE_DESCRIPTION("Hi6421v530 regulator driver"); +MODULE_LICENSE("GPL v2"); -- 2.10.2 -- 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
