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210 lines
5.7 KiB
210 lines
5.7 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// Device driver for regulators in Hi6421V530 IC |
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// |
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// Copyright (c) <2017> HiSilicon Technologies Co., Ltd. |
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// http://www.hisilicon.com |
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// Copyright (c) <2017> Linaro Ltd. |
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// https://www.linaro.org |
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// |
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// Author: Wang Xiaoyin <[email protected]> |
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// Guodong Xu <[email protected]> |
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#include <linux/mfd/hi6421-pmic.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/driver.h> |
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/* |
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* struct hi6421v530_regulator_info - hi6421v530 regulator information |
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* @desc: regulator description |
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* @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep |
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* @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only |
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*/ |
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struct hi6421v530_regulator_info { |
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struct regulator_desc rdesc; |
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u8 mode_mask; |
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u32 eco_microamp; |
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}; |
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/* HI6421v530 regulators */ |
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enum hi6421v530_regulator_id { |
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HI6421V530_LDO3, |
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HI6421V530_LDO9, |
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HI6421V530_LDO11, |
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HI6421V530_LDO15, |
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HI6421V530_LDO16, |
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}; |
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static const unsigned int ldo_3_voltages[] = { |
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1800000, 1825000, 1850000, 1875000, |
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1900000, 1925000, 1950000, 1975000, |
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2000000, 2025000, 2050000, 2075000, |
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2100000, 2125000, 2150000, 2200000, |
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}; |
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static const unsigned int ldo_9_11_voltages[] = { |
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1750000, 1800000, 1825000, 2800000, |
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2850000, 2950000, 3000000, 3300000, |
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}; |
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static const unsigned int ldo_15_16_voltages[] = { |
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1750000, 1800000, 2400000, 2600000, |
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2700000, 2850000, 2950000, 3000000, |
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}; |
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static const struct regulator_ops hi6421v530_ldo_ops; |
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#define HI6421V530_LDO_ENABLE_TIME (350) |
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/* |
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* _id - LDO id name string |
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* v_table - voltage table |
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* vreg - voltage select register |
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* vmask - voltage select mask |
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* ereg - enable register |
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* emask - enable mask |
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* odelay - off/on delay time in uS |
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* ecomask - eco mode mask |
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* ecoamp - eco mode load uppler limit in uA |
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*/ |
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#define HI6421V530_LDO(_ID, v_table, vreg, vmask, ereg, emask, \ |
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odelay, ecomask, ecoamp) { \ |
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.rdesc = { \ |
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.name = #_ID, \ |
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.of_match = of_match_ptr(#_ID), \ |
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.regulators_node = of_match_ptr("regulators"), \ |
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.ops = &hi6421v530_ldo_ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.id = HI6421V530_##_ID, \ |
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.owner = THIS_MODULE, \ |
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.n_voltages = ARRAY_SIZE(v_table), \ |
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.volt_table = v_table, \ |
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.vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \ |
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.vsel_mask = vmask, \ |
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.enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \ |
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.enable_mask = emask, \ |
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.enable_time = HI6421V530_LDO_ENABLE_TIME, \ |
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.off_on_delay = odelay, \ |
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}, \ |
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.mode_mask = ecomask, \ |
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.eco_microamp = ecoamp, \ |
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} |
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/* HI6421V530 regulator information */ |
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static struct hi6421v530_regulator_info hi6421v530_regulator_info[] = { |
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HI6421V530_LDO(LDO3, ldo_3_voltages, 0x061, 0xf, 0x060, 0x2, |
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20000, 0x6, 8000), |
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HI6421V530_LDO(LDO9, ldo_9_11_voltages, 0x06b, 0x7, 0x06a, 0x2, |
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40000, 0x6, 8000), |
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HI6421V530_LDO(LDO11, ldo_9_11_voltages, 0x06f, 0x7, 0x06e, 0x2, |
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40000, 0x6, 8000), |
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HI6421V530_LDO(LDO15, ldo_15_16_voltages, 0x077, 0x7, 0x076, 0x2, |
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40000, 0x6, 8000), |
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HI6421V530_LDO(LDO16, ldo_15_16_voltages, 0x079, 0x7, 0x078, 0x2, |
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40000, 0x6, 8000), |
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}; |
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static unsigned int hi6421v530_regulator_ldo_get_mode( |
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struct regulator_dev *rdev) |
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{ |
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struct hi6421v530_regulator_info *info; |
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unsigned int reg_val; |
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info = rdev_get_drvdata(rdev); |
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regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val); |
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if (reg_val & (info->mode_mask)) |
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return REGULATOR_MODE_IDLE; |
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return REGULATOR_MODE_NORMAL; |
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} |
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static int hi6421v530_regulator_ldo_set_mode(struct regulator_dev *rdev, |
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unsigned int mode) |
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{ |
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struct hi6421v530_regulator_info *info; |
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unsigned int new_mode; |
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info = rdev_get_drvdata(rdev); |
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switch (mode) { |
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case REGULATOR_MODE_NORMAL: |
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new_mode = 0; |
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break; |
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case REGULATOR_MODE_IDLE: |
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new_mode = info->mode_mask; |
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break; |
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default: |
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return -EINVAL; |
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} |
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regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
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info->mode_mask, new_mode); |
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return 0; |
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} |
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static const struct regulator_ops hi6421v530_ldo_ops = { |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.list_voltage = regulator_list_voltage_table, |
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.map_voltage = regulator_map_voltage_ascend, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.get_mode = hi6421v530_regulator_ldo_get_mode, |
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.set_mode = hi6421v530_regulator_ldo_set_mode, |
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}; |
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static int hi6421v530_regulator_probe(struct platform_device *pdev) |
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{ |
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struct hi6421_pmic *pmic; |
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struct regulator_dev *rdev; |
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struct regulator_config config = { }; |
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unsigned int i; |
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pmic = dev_get_drvdata(pdev->dev.parent); |
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if (!pmic) { |
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dev_err(&pdev->dev, "no pmic in the regulator parent node\n"); |
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return -ENODEV; |
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} |
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for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_info); i++) { |
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config.dev = pdev->dev.parent; |
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config.regmap = pmic->regmap; |
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config.driver_data = &hi6421v530_regulator_info[i]; |
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rdev = devm_regulator_register(&pdev->dev, |
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&hi6421v530_regulator_info[i].rdesc, |
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&config); |
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if (IS_ERR(rdev)) { |
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dev_err(&pdev->dev, "failed to register regulator %s\n", |
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hi6421v530_regulator_info[i].rdesc.name); |
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return PTR_ERR(rdev); |
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} |
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} |
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return 0; |
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} |
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static const struct platform_device_id hi6421v530_regulator_table[] = { |
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{ .name = "hi6421v530-regulator" }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(platform, hi6421v530_regulator_table); |
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static struct platform_driver hi6421v530_regulator_driver = { |
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.id_table = hi6421v530_regulator_table, |
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.driver = { |
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.name = "hi6421v530-regulator", |
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}, |
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.probe = hi6421v530_regulator_probe, |
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}; |
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module_platform_driver(hi6421v530_regulator_driver); |
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MODULE_AUTHOR("Wang Xiaoyin <[email protected]>"); |
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MODULE_DESCRIPTION("Hi6421v530 regulator driver"); |
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MODULE_LICENSE("GPL v2");
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