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265 lines
7.9 KiB
265 lines
7.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* AS3711 PMIC regulator driver, using DCDC Step Down and LDO supplies |
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* |
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* Copyright (C) 2012 Renesas Electronics Corporation |
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* Author: Guennadi Liakhovetski, <[email protected]> |
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*/ |
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#include <linux/err.h> |
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#include <linux/init.h> |
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#include <linux/mfd/as3711.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/regulator/of_regulator.h> |
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#include <linux/slab.h> |
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/* |
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* The regulator API supports 4 modes of operataion: FAST, NORMAL, IDLE and |
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* STANDBY. We map them in the following way to AS3711 SD1-4 DCDC modes: |
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* FAST: sdX_fast=1 |
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* NORMAL: low_noise=1 |
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* IDLE: low_noise=0 |
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*/ |
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static int as3711_set_mode_sd(struct regulator_dev *rdev, unsigned int mode) |
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{ |
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unsigned int fast_bit = rdev->desc->enable_mask, |
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low_noise_bit = fast_bit << 4; |
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u8 val; |
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switch (mode) { |
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case REGULATOR_MODE_FAST: |
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val = fast_bit | low_noise_bit; |
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break; |
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case REGULATOR_MODE_NORMAL: |
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val = low_noise_bit; |
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break; |
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case REGULATOR_MODE_IDLE: |
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val = 0; |
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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, AS3711_SD_CONTROL_1, |
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low_noise_bit | fast_bit, val); |
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} |
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static unsigned int as3711_get_mode_sd(struct regulator_dev *rdev) |
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{ |
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unsigned int fast_bit = rdev->desc->enable_mask, |
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low_noise_bit = fast_bit << 4, mask = fast_bit | low_noise_bit; |
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unsigned int val; |
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int ret = regmap_read(rdev->regmap, AS3711_SD_CONTROL_1, &val); |
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if (ret < 0) |
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return ret; |
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if ((val & mask) == mask) |
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return REGULATOR_MODE_FAST; |
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if ((val & mask) == low_noise_bit) |
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return REGULATOR_MODE_NORMAL; |
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if (!(val & mask)) |
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return REGULATOR_MODE_IDLE; |
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return -EINVAL; |
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} |
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static const struct regulator_ops as3711_sd_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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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.list_voltage = regulator_list_voltage_linear_range, |
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.map_voltage = regulator_map_voltage_linear_range, |
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.get_mode = as3711_get_mode_sd, |
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.set_mode = as3711_set_mode_sd, |
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}; |
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static const struct regulator_ops as3711_aldo_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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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.list_voltage = regulator_list_voltage_linear_range, |
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.map_voltage = regulator_map_voltage_linear_range, |
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}; |
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static const struct regulator_ops as3711_dldo_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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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.list_voltage = regulator_list_voltage_linear_range, |
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.map_voltage = regulator_map_voltage_linear_range, |
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}; |
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static const struct linear_range as3711_sd_ranges[] = { |
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REGULATOR_LINEAR_RANGE(612500, 0x1, 0x40, 12500), |
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REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000), |
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REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7f, 50000), |
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}; |
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static const struct linear_range as3711_aldo_ranges[] = { |
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REGULATOR_LINEAR_RANGE(1200000, 0, 0xf, 50000), |
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REGULATOR_LINEAR_RANGE(1800000, 0x10, 0x1f, 100000), |
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}; |
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static const struct linear_range as3711_dldo_ranges[] = { |
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REGULATOR_LINEAR_RANGE(900000, 0, 0x10, 50000), |
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REGULATOR_LINEAR_RANGE(1750000, 0x20, 0x3f, 50000), |
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}; |
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#define AS3711_REG(_id, _en_reg, _en_bit, _vmask, _sfx) \ |
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[AS3711_REGULATOR_ ## _id] = { \ |
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.name = "as3711-regulator-" # _id, \ |
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.id = AS3711_REGULATOR_ ## _id, \ |
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.n_voltages = (_vmask + 1), \ |
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.ops = &as3711_ ## _sfx ## _ops, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.owner = THIS_MODULE, \ |
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.vsel_reg = AS3711_ ## _id ## _VOLTAGE, \ |
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.vsel_mask = _vmask, \ |
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.enable_reg = AS3711_ ## _en_reg, \ |
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.enable_mask = BIT(_en_bit), \ |
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.linear_ranges = as3711_ ## _sfx ## _ranges, \ |
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.n_linear_ranges = ARRAY_SIZE(as3711_ ## _sfx ## _ranges), \ |
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} |
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static const struct regulator_desc as3711_reg_desc[] = { |
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AS3711_REG(SD_1, SD_CONTROL, 0, 0x7f, sd), |
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AS3711_REG(SD_2, SD_CONTROL, 1, 0x7f, sd), |
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AS3711_REG(SD_3, SD_CONTROL, 2, 0x7f, sd), |
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AS3711_REG(SD_4, SD_CONTROL, 3, 0x7f, sd), |
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AS3711_REG(LDO_1, LDO_1_VOLTAGE, 7, 0x1f, aldo), |
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AS3711_REG(LDO_2, LDO_2_VOLTAGE, 7, 0x1f, aldo), |
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AS3711_REG(LDO_3, LDO_3_VOLTAGE, 7, 0x3f, dldo), |
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AS3711_REG(LDO_4, LDO_4_VOLTAGE, 7, 0x3f, dldo), |
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AS3711_REG(LDO_5, LDO_5_VOLTAGE, 7, 0x3f, dldo), |
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AS3711_REG(LDO_6, LDO_6_VOLTAGE, 7, 0x3f, dldo), |
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AS3711_REG(LDO_7, LDO_7_VOLTAGE, 7, 0x3f, dldo), |
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AS3711_REG(LDO_8, LDO_8_VOLTAGE, 7, 0x3f, dldo), |
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/* StepUp output voltage depends on supplying regulator */ |
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}; |
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#define AS3711_REGULATOR_NUM ARRAY_SIZE(as3711_reg_desc) |
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static struct of_regulator_match |
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as3711_regulator_matches[AS3711_REGULATOR_NUM] = { |
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[AS3711_REGULATOR_SD_1] = { .name = "sd1" }, |
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[AS3711_REGULATOR_SD_2] = { .name = "sd2" }, |
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[AS3711_REGULATOR_SD_3] = { .name = "sd3" }, |
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[AS3711_REGULATOR_SD_4] = { .name = "sd4" }, |
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[AS3711_REGULATOR_LDO_1] = { .name = "ldo1" }, |
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[AS3711_REGULATOR_LDO_2] = { .name = "ldo2" }, |
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[AS3711_REGULATOR_LDO_3] = { .name = "ldo3" }, |
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[AS3711_REGULATOR_LDO_4] = { .name = "ldo4" }, |
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[AS3711_REGULATOR_LDO_5] = { .name = "ldo5" }, |
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[AS3711_REGULATOR_LDO_6] = { .name = "ldo6" }, |
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[AS3711_REGULATOR_LDO_7] = { .name = "ldo7" }, |
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[AS3711_REGULATOR_LDO_8] = { .name = "ldo8" }, |
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}; |
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static int as3711_regulator_parse_dt(struct device *dev, |
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struct device_node **of_node, const int count) |
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{ |
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struct as3711_regulator_pdata *pdata = dev_get_platdata(dev); |
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struct device_node *regulators = |
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of_get_child_by_name(dev->parent->of_node, "regulators"); |
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struct of_regulator_match *match; |
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int ret, i; |
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if (!regulators) { |
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dev_err(dev, "regulator node not found\n"); |
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return -ENODEV; |
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} |
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ret = of_regulator_match(dev->parent, regulators, |
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as3711_regulator_matches, count); |
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of_node_put(regulators); |
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if (ret < 0) { |
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dev_err(dev, "Error parsing regulator init data: %d\n", ret); |
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return ret; |
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} |
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for (i = 0, match = as3711_regulator_matches; i < count; i++, match++) |
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if (match->of_node) { |
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pdata->init_data[i] = match->init_data; |
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of_node[i] = match->of_node; |
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} |
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return 0; |
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} |
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static int as3711_regulator_probe(struct platform_device *pdev) |
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{ |
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struct as3711_regulator_pdata *pdata = dev_get_platdata(&pdev->dev); |
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struct as3711 *as3711 = dev_get_drvdata(pdev->dev.parent); |
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struct regulator_config config = {.dev = &pdev->dev,}; |
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struct device_node *of_node[AS3711_REGULATOR_NUM] = {}; |
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struct regulator_dev *rdev; |
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int ret; |
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int id; |
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if (!pdata) { |
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dev_err(&pdev->dev, "No platform data...\n"); |
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return -ENODEV; |
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} |
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if (pdev->dev.parent->of_node) { |
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ret = as3711_regulator_parse_dt(&pdev->dev, of_node, AS3711_REGULATOR_NUM); |
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if (ret < 0) { |
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dev_err(&pdev->dev, "DT parsing failed: %d\n", ret); |
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return ret; |
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} |
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} |
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for (id = 0; id < AS3711_REGULATOR_NUM; id++) { |
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config.init_data = pdata->init_data[id]; |
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config.regmap = as3711->regmap; |
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config.of_node = of_node[id]; |
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rdev = devm_regulator_register(&pdev->dev, &as3711_reg_desc[id], |
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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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as3711_reg_desc[id].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 struct platform_driver as3711_regulator_driver = { |
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.driver = { |
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.name = "as3711-regulator", |
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}, |
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.probe = as3711_regulator_probe, |
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}; |
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static int __init as3711_regulator_init(void) |
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{ |
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return platform_driver_register(&as3711_regulator_driver); |
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} |
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subsys_initcall(as3711_regulator_init); |
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static void __exit as3711_regulator_exit(void) |
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{ |
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platform_driver_unregister(&as3711_regulator_driver); |
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} |
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module_exit(as3711_regulator_exit); |
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MODULE_AUTHOR("Guennadi Liakhovetski <[email protected]>"); |
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MODULE_DESCRIPTION("AS3711 regulator driver"); |
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MODULE_ALIAS("platform:as3711-regulator"); |
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MODULE_LICENSE("GPL v2");
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