diff options
Diffstat (limited to 'drivers/regulator/hi6421v530-regulator.c')
| -rw-r--r-- | drivers/regulator/hi6421v530-regulator.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/drivers/regulator/hi6421v530-regulator.c b/drivers/regulator/hi6421v530-regulator.c new file mode 100644 index 000000000000..c09bc71538a5 --- /dev/null +++ b/drivers/regulator/hi6421v530-regulator.c @@ -0,0 +1,214 @@ +/* + * 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@hisilicon.com> + * Guodong Xu <guodong.xu@linaro.org> + * + * 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/mfd/hi6421-pmic.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/regulator/driver.h> + +/* + * 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 rdesc; + u8 mode_mask; + u32 eco_microamp; +}; + +/* HI6421v530 regulators */ +enum hi6421v530_regulator_id { + HI6421V530_LDO3, + HI6421V530_LDO9, + HI6421V530_LDO11, + HI6421V530_LDO15, + HI6421V530_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) { \ + .rdesc = { \ + .name = #_ID, \ + .of_match = of_match_ptr(#_ID), \ + .regulators_node = of_match_ptr("regulators"), \ + .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_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 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; + unsigned int new_mode; + + info = rdev_get_drvdata(rdev); + switch (mode) { + case REGULATOR_MODE_NORMAL: + new_mode = 0; + break; + case REGULATOR_MODE_IDLE: + new_mode = info->mode_mask; + break; + default: + return -EINVAL; + } + + regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + info->mode_mask, new_mode); + + return 0; +} + + +static const struct regulator_ops hi6421v530_ldo_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .list_voltage = regulator_list_voltage_table, + .map_voltage = regulator_map_voltage_ascend, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .get_mode = hi6421v530_regulator_ldo_get_mode, + .set_mode = hi6421v530_regulator_ldo_set_mode, +}; + +static int hi6421v530_regulator_probe(struct platform_device *pdev) +{ + struct hi6421_pmic *pmic; + struct regulator_dev *rdev; + struct regulator_config config = { }; + unsigned int i; + + pmic = dev_get_drvdata(pdev->dev.parent); + if (!pmic) { + dev_err(&pdev->dev, "no pmic in the regulator parent node\n"); + return -ENODEV; + } + + for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_info); i++) { + config.dev = pdev->dev.parent; + config.regmap = pmic->regmap; + config.driver_data = &hi6421v530_regulator_info[i]; + + rdev = devm_regulator_register(&pdev->dev, + &hi6421v530_regulator_info[i].rdesc, + &config); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, "failed to register regulator %s\n", + hi6421v530_regulator_info[i].rdesc.name); + return PTR_ERR(rdev); + } + } + return 0; +} + +static const struct platform_device_id hi6421v530_regulator_table[] = { + { .name = "hi6421v530-regulator" }, + {}, +}; +MODULE_DEVICE_TABLE(platform, hi6421v530_regulator_table); + +static struct platform_driver hi6421v530_regulator_driver = { + .id_table = hi6421v530_regulator_table, + .driver = { + .name = "hi6421v530-regulator", + }, + .probe = hi6421v530_regulator_probe, +}; +module_platform_driver(hi6421v530_regulator_driver); + +MODULE_AUTHOR("Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>"); +MODULE_DESCRIPTION("Hi6421v530 regulator driver"); +MODULE_LICENSE("GPL v2"); |