| // SPDX-License-Identifier: GPL-2.0 |
| // |
| // Device driver for regulators in Hisi IC |
| // |
| // Copyright (c) 2013 Linaro Ltd. |
| // Copyright (c) 2011 HiSilicon Ltd. |
| // Copyright (c) 2020-2021 Huawei Technologies Co., Ltd. |
| // |
| // Guodong Xu <guodong.xu@linaro.org> |
| |
| #include <linux/delay.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/platform_device.h> |
| #include <linux/regmap.h> |
| #include <linux/regulator/driver.h> |
| #include <linux/spmi.h> |
| |
| struct hi6421_spmi_reg_priv { |
| /* Serialize regulator enable logic */ |
| struct mutex enable_mutex; |
| }; |
| |
| struct hi6421_spmi_reg_info { |
| struct regulator_desc desc; |
| u8 eco_mode_mask; |
| u32 eco_uA; |
| }; |
| |
| static const unsigned int range_1v5_to_2v0[] = { |
| 1500000, 1550000, 1600000, 1650000, |
| 1700000, 1725000, 1750000, 1775000, |
| 1800000, 1825000, 1850000, 1875000, |
| 1900000, 1925000, 1950000, 2000000 |
| }; |
| |
| static const unsigned int range_1v725_to_1v9[] = { |
| 1725000, 1750000, 1775000, 1800000, |
| 1825000, 1850000, 1875000, 1900000 |
| }; |
| |
| static const unsigned int range_1v75_to_3v3[] = { |
| 1750000, 1800000, 1825000, 2800000, |
| 2850000, 2950000, 3000000, 3300000 |
| }; |
| |
| static const unsigned int range_1v8_to_3v0[] = { |
| 1800000, 1850000, 2400000, 2600000, |
| 2700000, 2850000, 2950000, 3000000 |
| }; |
| |
| static const unsigned int range_2v5_to_3v3[] = { |
| 2500000, 2600000, 2700000, 2800000, |
| 3000000, 3100000, 3200000, 3300000 |
| }; |
| |
| static const unsigned int range_2v6_to_3v3[] = { |
| 2600000, 2700000, 2800000, 2900000, |
| 3000000, 3100000, 3200000, 3300000 |
| }; |
| |
| /** |
| * HI6421V600_LDO() - specify a LDO power line |
| * @_id: LDO id name string |
| * @vtable: voltage table |
| * @ereg: enable register |
| * @emask: enable mask |
| * @vreg: voltage select register |
| * @odelay: off/on delay time in uS |
| * @etime: enable time in uS |
| * @ecomask: eco mode mask |
| * @ecoamp: eco mode load uppler limit in uA |
| */ |
| #define HI6421V600_LDO(_id, vtable, ereg, emask, vreg, \ |
| odelay, etime, ecomask, ecoamp) \ |
| [hi6421v600_##_id] = { \ |
| .desc = { \ |
| .name = #_id, \ |
| .of_match = of_match_ptr(#_id), \ |
| .regulators_node = of_match_ptr("regulators"), \ |
| .ops = &hi6421_spmi_ldo_rops, \ |
| .type = REGULATOR_VOLTAGE, \ |
| .id = hi6421v600_##_id, \ |
| .owner = THIS_MODULE, \ |
| .volt_table = vtable, \ |
| .n_voltages = ARRAY_SIZE(vtable), \ |
| .vsel_mask = ARRAY_SIZE(vtable) - 1, \ |
| .vsel_reg = vreg, \ |
| .enable_reg = ereg, \ |
| .enable_mask = emask, \ |
| .enable_time = etime, \ |
| .ramp_delay = etime, \ |
| .off_on_delay = odelay, \ |
| }, \ |
| .eco_mode_mask = ecomask, \ |
| .eco_uA = ecoamp, \ |
| } |
| |
| static int hi6421_spmi_regulator_enable(struct regulator_dev *rdev) |
| { |
| struct hi6421_spmi_reg_priv *priv = rdev_get_drvdata(rdev); |
| int ret; |
| |
| /* cannot enable more than one regulator at one time */ |
| mutex_lock(&priv->enable_mutex); |
| |
| ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
| rdev->desc->enable_mask, |
| rdev->desc->enable_mask); |
| |
| /* Avoid powering up multiple devices at the same time */ |
| usleep_range(rdev->desc->off_on_delay, rdev->desc->off_on_delay + 60); |
| |
| mutex_unlock(&priv->enable_mutex); |
| |
| return ret; |
| } |
| |
| static unsigned int hi6421_spmi_regulator_get_mode(struct regulator_dev *rdev) |
| { |
| const struct hi6421_spmi_reg_info *sreg; |
| unsigned int reg_val; |
| |
| sreg = container_of(rdev->desc, struct hi6421_spmi_reg_info, desc); |
| regmap_read(rdev->regmap, rdev->desc->enable_reg, ®_val); |
| |
| if (reg_val & sreg->eco_mode_mask) |
| return REGULATOR_MODE_IDLE; |
| |
| return REGULATOR_MODE_NORMAL; |
| } |
| |
| static int hi6421_spmi_regulator_set_mode(struct regulator_dev *rdev, |
| unsigned int mode) |
| { |
| const struct hi6421_spmi_reg_info *sreg; |
| unsigned int val; |
| |
| sreg = container_of(rdev->desc, struct hi6421_spmi_reg_info, desc); |
| switch (mode) { |
| case REGULATOR_MODE_NORMAL: |
| val = 0; |
| break; |
| case REGULATOR_MODE_IDLE: |
| if (!sreg->eco_mode_mask) |
| return -EINVAL; |
| |
| val = sreg->eco_mode_mask; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, |
| sreg->eco_mode_mask, val); |
| } |
| |
| static unsigned int |
| hi6421_spmi_regulator_get_optimum_mode(struct regulator_dev *rdev, |
| int input_uV, int output_uV, |
| int load_uA) |
| { |
| const struct hi6421_spmi_reg_info *sreg; |
| |
| sreg = container_of(rdev->desc, struct hi6421_spmi_reg_info, desc); |
| |
| if (!sreg->eco_uA || ((unsigned int)load_uA > sreg->eco_uA)) |
| return REGULATOR_MODE_NORMAL; |
| |
| return REGULATOR_MODE_IDLE; |
| } |
| |
| static const struct regulator_ops hi6421_spmi_ldo_rops = { |
| .is_enabled = regulator_is_enabled_regmap, |
| .enable = hi6421_spmi_regulator_enable, |
| .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 = hi6421_spmi_regulator_get_mode, |
| .set_mode = hi6421_spmi_regulator_set_mode, |
| .get_optimum_mode = hi6421_spmi_regulator_get_optimum_mode, |
| }; |
| |
| /* HI6421v600 regulators with known registers */ |
| enum hi6421_spmi_regulator_id { |
| hi6421v600_ldo3, |
| hi6421v600_ldo4, |
| hi6421v600_ldo9, |
| hi6421v600_ldo15, |
| hi6421v600_ldo16, |
| hi6421v600_ldo17, |
| hi6421v600_ldo33, |
| hi6421v600_ldo34, |
| }; |
| |
| static const struct hi6421_spmi_reg_info regulator_info[] = { |
| HI6421V600_LDO(ldo3, range_1v5_to_2v0, |
| 0x16, 0x01, 0x51, |
| 20000, 120, |
| 0, 0), |
| HI6421V600_LDO(ldo4, range_1v725_to_1v9, |
| 0x17, 0x01, 0x52, |
| 20000, 120, |
| 0x10, 10000), |
| HI6421V600_LDO(ldo9, range_1v75_to_3v3, |
| 0x1c, 0x01, 0x57, |
| 20000, 360, |
| 0x10, 10000), |
| HI6421V600_LDO(ldo15, range_1v8_to_3v0, |
| 0x21, 0x01, 0x5c, |
| 20000, 360, |
| 0x10, 10000), |
| HI6421V600_LDO(ldo16, range_1v8_to_3v0, |
| 0x22, 0x01, 0x5d, |
| 20000, 360, |
| 0x10, 10000), |
| HI6421V600_LDO(ldo17, range_2v5_to_3v3, |
| 0x23, 0x01, 0x5e, |
| 20000, 120, |
| 0x10, 10000), |
| HI6421V600_LDO(ldo33, range_2v5_to_3v3, |
| 0x32, 0x01, 0x6d, |
| 20000, 120, |
| 0, 0), |
| HI6421V600_LDO(ldo34, range_2v6_to_3v3, |
| 0x33, 0x01, 0x6e, |
| 20000, 120, |
| 0, 0), |
| }; |
| |
| static int hi6421_spmi_regulator_probe(struct platform_device *pdev) |
| { |
| struct device *pmic_dev = pdev->dev.parent; |
| struct regulator_config config = { }; |
| struct hi6421_spmi_reg_priv *priv; |
| const struct hi6421_spmi_reg_info *info; |
| struct device *dev = &pdev->dev; |
| struct regmap *regmap; |
| struct regulator_dev *rdev; |
| int i; |
| |
| /* |
| * This driver is meant to be called by hi6421-spmi-core, |
| * which should first set drvdata. If this doesn't happen, hit |
| * a warn on and return. |
| */ |
| regmap = dev_get_drvdata(pmic_dev); |
| if (WARN_ON(!regmap)) |
| return -ENODEV; |
| |
| priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
| if (!priv) |
| return -ENOMEM; |
| |
| mutex_init(&priv->enable_mutex); |
| |
| for (i = 0; i < ARRAY_SIZE(regulator_info); i++) { |
| info = ®ulator_info[i]; |
| |
| config.dev = pdev->dev.parent; |
| config.driver_data = priv; |
| config.regmap = regmap; |
| |
| rdev = devm_regulator_register(dev, &info->desc, &config); |
| if (IS_ERR(rdev)) { |
| dev_err(dev, "failed to register %s\n", |
| info->desc.name); |
| return PTR_ERR(rdev); |
| } |
| } |
| |
| return 0; |
| } |
| |
| static const struct platform_device_id hi6421_spmi_regulator_table[] = { |
| { .name = "hi6421v600-regulator" }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(platform, hi6421_spmi_regulator_table); |
| |
| static struct platform_driver hi6421_spmi_regulator_driver = { |
| .id_table = hi6421_spmi_regulator_table, |
| .driver = { |
| .name = "hi6421v600-regulator", |
| .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
| }, |
| .probe = hi6421_spmi_regulator_probe, |
| }; |
| module_platform_driver(hi6421_spmi_regulator_driver); |
| |
| MODULE_DESCRIPTION("Hi6421v600 SPMI regulator driver"); |
| MODULE_LICENSE("GPL v2"); |
| |