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418 lines
9.9 KiB
418 lines
9.9 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// arizona-ldo1.c -- LDO1 supply for Arizona devices |
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// |
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// Copyright 2012 Wolfson Microelectronics PLC. |
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// |
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// Author: Mark Brown <[email protected]> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/init.h> |
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#include <linux/bitops.h> |
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#include <linux/err.h> |
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#include <linux/of.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/platform_device.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/machine.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/slab.h> |
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#include <linux/regulator/arizona-ldo1.h> |
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#include <linux/mfd/arizona/core.h> |
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#include <linux/mfd/arizona/pdata.h> |
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#include <linux/mfd/arizona/registers.h> |
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#include <linux/mfd/madera/core.h> |
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#include <linux/mfd/madera/pdata.h> |
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#include <linux/mfd/madera/registers.h> |
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struct arizona_ldo1 { |
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struct regulator_dev *regulator; |
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struct regmap *regmap; |
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struct regulator_consumer_supply supply; |
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struct regulator_init_data init_data; |
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struct gpio_desc *ena_gpiod; |
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}; |
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static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev, |
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unsigned sel) |
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{ |
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struct regmap *regmap = rdev_get_regmap(rdev); |
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unsigned int val; |
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int ret; |
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if (sel == rdev->desc->n_voltages - 1) |
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val = ARIZONA_LDO1_HI_PWR; |
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else |
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val = 0; |
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ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2, |
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ARIZONA_LDO1_HI_PWR, val); |
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if (ret != 0) |
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return ret; |
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if (val) |
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return 0; |
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return regulator_set_voltage_sel_regmap(rdev, sel); |
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} |
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static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev) |
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{ |
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struct regmap *regmap = rdev_get_regmap(rdev); |
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unsigned int val; |
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int ret; |
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ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val); |
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if (ret != 0) |
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return ret; |
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if (val & ARIZONA_LDO1_HI_PWR) |
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return rdev->desc->n_voltages - 1; |
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return regulator_get_voltage_sel_regmap(rdev); |
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} |
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static const struct regulator_ops arizona_ldo1_hc_ops = { |
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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_voltage_sel = arizona_ldo1_hc_get_voltage_sel, |
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.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel, |
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.get_bypass = regulator_get_bypass_regmap, |
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.set_bypass = regulator_set_bypass_regmap, |
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}; |
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static const struct linear_range arizona_ldo1_hc_ranges[] = { |
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REGULATOR_LINEAR_RANGE(900000, 0, 0x6, 50000), |
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REGULATOR_LINEAR_RANGE(1800000, 0x7, 0x7, 0), |
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}; |
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static const struct regulator_desc arizona_ldo1_hc = { |
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.name = "LDO1", |
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.supply_name = "LDOVDD", |
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.type = REGULATOR_VOLTAGE, |
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.ops = &arizona_ldo1_hc_ops, |
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.vsel_reg = ARIZONA_LDO1_CONTROL_1, |
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.vsel_mask = ARIZONA_LDO1_VSEL_MASK, |
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.bypass_reg = ARIZONA_LDO1_CONTROL_1, |
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.bypass_mask = ARIZONA_LDO1_BYPASS, |
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.linear_ranges = arizona_ldo1_hc_ranges, |
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.n_linear_ranges = ARRAY_SIZE(arizona_ldo1_hc_ranges), |
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.n_voltages = 8, |
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.enable_time = 1500, |
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.ramp_delay = 24000, |
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.owner = THIS_MODULE, |
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}; |
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static const struct regulator_ops arizona_ldo1_ops = { |
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.list_voltage = regulator_list_voltage_linear, |
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.map_voltage = regulator_map_voltage_linear, |
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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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}; |
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static const struct regulator_desc arizona_ldo1 = { |
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.name = "LDO1", |
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.supply_name = "LDOVDD", |
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.type = REGULATOR_VOLTAGE, |
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.ops = &arizona_ldo1_ops, |
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.vsel_reg = ARIZONA_LDO1_CONTROL_1, |
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.vsel_mask = ARIZONA_LDO1_VSEL_MASK, |
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.min_uV = 900000, |
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.uV_step = 25000, |
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.n_voltages = 13, |
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.enable_time = 500, |
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.ramp_delay = 24000, |
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.owner = THIS_MODULE, |
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}; |
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static const struct regulator_init_data arizona_ldo1_dvfs = { |
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.constraints = { |
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.min_uV = 1200000, |
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.max_uV = 1800000, |
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.valid_ops_mask = REGULATOR_CHANGE_STATUS | |
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REGULATOR_CHANGE_VOLTAGE, |
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}, |
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.num_consumer_supplies = 1, |
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}; |
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static const struct regulator_init_data arizona_ldo1_default = { |
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.constraints = { |
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.valid_ops_mask = REGULATOR_CHANGE_STATUS, |
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}, |
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.num_consumer_supplies = 1, |
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}; |
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static const struct regulator_init_data arizona_ldo1_wm5110 = { |
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.constraints = { |
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.min_uV = 1175000, |
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.max_uV = 1200000, |
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.valid_ops_mask = REGULATOR_CHANGE_STATUS | |
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REGULATOR_CHANGE_VOLTAGE, |
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}, |
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.num_consumer_supplies = 1, |
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}; |
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static const struct regulator_desc madera_ldo1 = { |
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.name = "LDO1", |
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.supply_name = "LDOVDD", |
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.type = REGULATOR_VOLTAGE, |
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.ops = &arizona_ldo1_ops, |
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.vsel_reg = MADERA_LDO1_CONTROL_1, |
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.vsel_mask = MADERA_LDO1_VSEL_MASK, |
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.min_uV = 900000, |
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.uV_step = 25000, |
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.n_voltages = 13, |
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.enable_time = 3000, |
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.owner = THIS_MODULE, |
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}; |
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static const struct regulator_init_data madera_ldo1_default = { |
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.constraints = { |
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.min_uV = 1200000, |
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.max_uV = 1200000, |
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.valid_ops_mask = REGULATOR_CHANGE_STATUS, |
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}, |
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.num_consumer_supplies = 1, |
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}; |
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static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata, |
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struct regulator_config *config, |
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const struct regulator_desc *desc, |
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bool *external_dcvdd) |
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{ |
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struct arizona_ldo1 *ldo1 = config->driver_data; |
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struct device_node *np = config->dev->of_node; |
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struct device_node *init_node, *dcvdd_node; |
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struct regulator_init_data *init_data; |
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init_node = of_get_child_by_name(np, "ldo1"); |
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dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0); |
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if (init_node) { |
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config->of_node = init_node; |
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init_data = of_get_regulator_init_data(config->dev, init_node, |
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desc); |
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if (init_data) { |
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init_data->consumer_supplies = &ldo1->supply; |
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init_data->num_consumer_supplies = 1; |
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if (dcvdd_node && dcvdd_node != init_node) |
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*external_dcvdd = true; |
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pdata->init_data = init_data; |
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} |
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} else if (dcvdd_node) { |
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*external_dcvdd = true; |
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} |
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of_node_put(dcvdd_node); |
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return 0; |
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} |
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static int arizona_ldo1_common_init(struct platform_device *pdev, |
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struct arizona_ldo1 *ldo1, |
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const struct regulator_desc *desc, |
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struct arizona_ldo1_pdata *pdata, |
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bool *external_dcvdd) |
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{ |
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struct device *parent_dev = pdev->dev.parent; |
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struct regulator_config config = { }; |
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int ret; |
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*external_dcvdd = false; |
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ldo1->supply.supply = "DCVDD"; |
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ldo1->init_data.consumer_supplies = &ldo1->supply; |
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ldo1->supply.dev_name = dev_name(parent_dev); |
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config.dev = parent_dev; |
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config.driver_data = ldo1; |
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config.regmap = ldo1->regmap; |
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if (IS_ENABLED(CONFIG_OF)) { |
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if (!dev_get_platdata(parent_dev)) { |
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ret = arizona_ldo1_of_get_pdata(pdata, |
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&config, desc, |
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external_dcvdd); |
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if (ret < 0) |
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return ret; |
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} |
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} |
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/* We assume that high output = regulator off |
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* Don't use devm, since we need to get against the parent device |
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* so clean up would happen at the wrong time |
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*/ |
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config.ena_gpiod = gpiod_get_optional(parent_dev, "wlf,ldoena", |
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GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE); |
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if (IS_ERR(config.ena_gpiod)) |
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return PTR_ERR(config.ena_gpiod); |
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ldo1->ena_gpiod = config.ena_gpiod; |
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if (pdata->init_data) |
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config.init_data = pdata->init_data; |
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else |
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config.init_data = &ldo1->init_data; |
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/* |
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* LDO1 can only be used to supply DCVDD so if it has no |
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* consumers then DCVDD is supplied externally. |
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*/ |
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if (config.init_data->num_consumer_supplies == 0) |
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*external_dcvdd = true; |
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ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config); |
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of_node_put(config.of_node); |
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if (IS_ERR(ldo1->regulator)) { |
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ret = PTR_ERR(ldo1->regulator); |
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dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n", |
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ret); |
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return ret; |
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} |
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platform_set_drvdata(pdev, ldo1); |
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return 0; |
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} |
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static int arizona_ldo1_probe(struct platform_device *pdev) |
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{ |
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struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); |
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struct arizona_ldo1 *ldo1; |
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const struct regulator_desc *desc; |
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bool external_dcvdd; |
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int ret; |
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ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); |
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if (!ldo1) |
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return -ENOMEM; |
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ldo1->regmap = arizona->regmap; |
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/* |
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* Since the chip usually supplies itself we provide some |
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* default init_data for it. This will be overridden with |
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* platform data if provided. |
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*/ |
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switch (arizona->type) { |
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case WM5102: |
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case WM8997: |
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case WM8998: |
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case WM1814: |
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desc = &arizona_ldo1_hc; |
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ldo1->init_data = arizona_ldo1_dvfs; |
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break; |
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case WM5110: |
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case WM8280: |
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desc = &arizona_ldo1; |
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ldo1->init_data = arizona_ldo1_wm5110; |
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break; |
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default: |
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desc = &arizona_ldo1; |
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ldo1->init_data = arizona_ldo1_default; |
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break; |
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} |
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ret = arizona_ldo1_common_init(pdev, ldo1, desc, |
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&arizona->pdata.ldo1, |
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&external_dcvdd); |
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if (ret == 0) |
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arizona->external_dcvdd = external_dcvdd; |
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return ret; |
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} |
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static int arizona_ldo1_remove(struct platform_device *pdev) |
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{ |
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struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev); |
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if (ldo1->ena_gpiod) |
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gpiod_put(ldo1->ena_gpiod); |
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return 0; |
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} |
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static int madera_ldo1_probe(struct platform_device *pdev) |
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{ |
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struct madera *madera = dev_get_drvdata(pdev->dev.parent); |
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struct arizona_ldo1 *ldo1; |
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bool external_dcvdd; |
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int ret; |
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ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); |
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if (!ldo1) |
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return -ENOMEM; |
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ldo1->regmap = madera->regmap; |
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ldo1->init_data = madera_ldo1_default; |
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ret = arizona_ldo1_common_init(pdev, ldo1, &madera_ldo1, |
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&madera->pdata.ldo1, |
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&external_dcvdd); |
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if (ret) |
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return ret; |
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madera->internal_dcvdd = !external_dcvdd; |
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return 0; |
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} |
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static struct platform_driver arizona_ldo1_driver = { |
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.probe = arizona_ldo1_probe, |
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.remove = arizona_ldo1_remove, |
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.driver = { |
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.name = "arizona-ldo1", |
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}, |
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}; |
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static struct platform_driver madera_ldo1_driver = { |
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.probe = madera_ldo1_probe, |
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.remove = arizona_ldo1_remove, |
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.driver = { |
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.name = "madera-ldo1", |
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}, |
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}; |
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static struct platform_driver * const madera_ldo1_drivers[] = { |
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&arizona_ldo1_driver, |
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&madera_ldo1_driver, |
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}; |
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static int __init arizona_ldo1_init(void) |
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{ |
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return platform_register_drivers(madera_ldo1_drivers, |
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ARRAY_SIZE(madera_ldo1_drivers)); |
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} |
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module_init(arizona_ldo1_init); |
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static void __exit madera_ldo1_exit(void) |
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{ |
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platform_unregister_drivers(madera_ldo1_drivers, |
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ARRAY_SIZE(madera_ldo1_drivers)); |
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} |
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module_exit(madera_ldo1_exit); |
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/* Module information */ |
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MODULE_AUTHOR("Mark Brown <[email protected]>"); |
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MODULE_DESCRIPTION("Arizona LDO1 driver"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:arizona-ldo1"); |
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MODULE_ALIAS("platform:madera-ldo1");
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