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