246 lines
7 KiB
C
246 lines
7 KiB
C
/*
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* Regulators driver for allwinnertech AXPDUMMY
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*
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* Copyright (C) 2014 allwinnertech Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/regmap.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/module.h>
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#include <linux/power/axp_depend.h>
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#include "../axp-core.h"
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#include "../axp-regulator.h"
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#include "axpdummy-regu.h"
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/* Reverse engineered partly from Platformx drivers */
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enum axp_regls {
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VCC_LDO1,
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VCC_LDO2,
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VCC_LDO3,
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VCC_LDO4,
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VCC_LDO5,
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VCC_LDO6,
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VCC_LDO7,
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VCC_LDO8,
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VCC_LDO9,
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VCC_LDO10,
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VCC_LDO11,
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VCC_LDO12,
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VCC_LDO13,
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VCC_LDO14,
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VCC_LDO15,
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VCC_LDO16,
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VCC_LDO17,
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VCC_LDO18,
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VCC_LDO19,
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VCC_LDO20,
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VCC_DUMMY_MAX,
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};
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struct axpdummy_regulators {
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struct regulator_dev *regulators[VCC_DUMMY_MAX];
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struct axp_dev *chip;
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};
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static struct axp_regulator_info axpdummy_regulator_info[] = {
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AXPDUMMY_REGU_INFO("axpdummy_ldo1", VCC_LDO1),
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AXPDUMMY_REGU_INFO("axpdummy_ldo2", VCC_LDO2),
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AXPDUMMY_REGU_INFO("axpdummy_ldo3", VCC_LDO3),
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AXPDUMMY_REGU_INFO("axpdummy_ldo4", VCC_LDO4),
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AXPDUMMY_REGU_INFO("axpdummy_ldo5", VCC_LDO5),
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AXPDUMMY_REGU_INFO("axpdummy_ldo6", VCC_LDO6),
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AXPDUMMY_REGU_INFO("axpdummy_ldo7", VCC_LDO7),
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AXPDUMMY_REGU_INFO("axpdummy_ldo8", VCC_LDO8),
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AXPDUMMY_REGU_INFO("axpdummy_ldo9", VCC_LDO9),
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AXPDUMMY_REGU_INFO("axpdummy_ldo10", VCC_LDO10),
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AXPDUMMY_REGU_INFO("axpdummy_ldo11", VCC_LDO11),
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AXPDUMMY_REGU_INFO("axpdummy_ldo12", VCC_LDO12),
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AXPDUMMY_REGU_INFO("axpdummy_ldo13", VCC_LDO13),
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AXPDUMMY_REGU_INFO("axpdummy_ldo14", VCC_LDO14),
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AXPDUMMY_REGU_INFO("axpdummy_ldo15", VCC_LDO15),
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AXPDUMMY_REGU_INFO("axpdummy_ldo16", VCC_LDO16),
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AXPDUMMY_REGU_INFO("axpdummy_ldo17", VCC_LDO17),
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AXPDUMMY_REGU_INFO("axpdummy_ldo18", VCC_LDO18),
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AXPDUMMY_REGU_INFO("axpdummy_ldo19", VCC_LDO19),
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AXPDUMMY_REGU_INFO("axpdummy_ldo20", VCC_LDO20),
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};
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static struct regulator_init_data axp_regl_init_data[] = {
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REGU_INIT_DATA("axpdummy_ldo1"),
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REGU_INIT_DATA("axpdummy_ldo2"),
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REGU_INIT_DATA("axpdummy_ldo3"),
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REGU_INIT_DATA("axpdummy_ldo4"),
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REGU_INIT_DATA("axpdummy_ldo5"),
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REGU_INIT_DATA("axpdummy_ldo6"),
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REGU_INIT_DATA("axpdummy_ldo7"),
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REGU_INIT_DATA("axpdummy_ldo8"),
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REGU_INIT_DATA("axpdummy_ldo9"),
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REGU_INIT_DATA("axpdummy_ldo10"),
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REGU_INIT_DATA("axpdummy_ldo11"),
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REGU_INIT_DATA("axpdummy_ldo12"),
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REGU_INIT_DATA("axpdummy_ldo13"),
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REGU_INIT_DATA("axpdummy_ldo14"),
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REGU_INIT_DATA("axpdummy_ldo15"),
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REGU_INIT_DATA("axpdummy_ldo16"),
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REGU_INIT_DATA("axpdummy_ldo17"),
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REGU_INIT_DATA("axpdummy_ldo18"),
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REGU_INIT_DATA("axpdummy_ldo19"),
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REGU_INIT_DATA("axpdummy_ldo20"),
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};
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int axpdummy_ldo_count;
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static s32 axpdummy_regu_dependence(const char *ldo_name)
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{
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s32 axpdummy_dependence = 0;
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if (strcmp("axpdummy_ldo1", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO1;
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else if (strcmp("axpdummy_ldo2", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO2;
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else if (strcmp("axpdummy_ldo3", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO3;
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else if (strcmp("axpdummy_ldo4", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO4;
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else if (strcmp("axpdummy_ldo5", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO5;
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else if (strcmp("axpdummy_ldo6", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO6;
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else if (strcmp("axpdummy_ldo7", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO7;
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else if (strcmp("axpdummy_ldo8", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO8;
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else if (strcmp("axpdummy_ldo9", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO9;
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else if (strcmp("axpdummy_ldo10", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO10;
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else if (strcmp("axpdummy_ldo11", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO11;
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else if (strcmp("axpdummy_ldo12", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO12;
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else if (strcmp("axpdummy_ldo13", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO13;
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else if (strcmp("axpdummy_ldo14", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO14;
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else if (strcmp("axpdummy_ldo15", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO15;
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else if (strcmp("axpdummy_ldo16", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO16;
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else if (strcmp("axpdummy_ldo17", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO17;
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else if (strcmp("axpdummy_ldo18", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO18;
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else if (strcmp("axpdummy_ldo19", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO19;
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else if (strcmp("axpdummy_ldo20", ldo_name) == 0)
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axpdummy_dependence |= AXPDUMMY_LDO20;
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else
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return -1;
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return axpdummy_dependence;
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}
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static int axpdummy_regulator_probe(struct platform_device *pdev)
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{
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s32 i, ret = 0;
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struct axp_regulator_info *info;
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struct axpdummy_regulators *regu_data;
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struct axp_dev *axp_dev = dev_get_drvdata(pdev->dev.parent);
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if (pdev->dev.of_node) {
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ret = axp_regulator_dt_parse(pdev->dev.of_node,
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axp_regl_init_data,
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axpdummy_regu_dependence);
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if (ret) {
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pr_err("%s parse device tree err\n", __func__);
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return -EINVAL;
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}
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} else {
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pr_err("axpdummy regulator device tree err!\n");
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return -EBUSY;
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}
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if (axp_get_ldo_count(pdev->dev.of_node, &axpdummy_ldo_count))
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return -EINVAL;
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regu_data = devm_kzalloc(&pdev->dev, sizeof(*regu_data),
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GFP_KERNEL);
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if (!regu_data)
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return -ENOMEM;
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regu_data->chip = axp_dev;
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platform_set_drvdata(pdev, regu_data);
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for (i = 0; i < axpdummy_ldo_count; i++) {
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info = &axpdummy_regulator_info[i];
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regu_data->regulators[i] = axp_regulator_register(
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&pdev->dev, axp_dev->regmap,
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&axp_regl_init_data[i], info);
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if (IS_ERR(regu_data->regulators[i])) {
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dev_err(&pdev->dev,
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"failed to register regulator %d\n", i);
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while (--i >= 0)
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axp_regulator_unregister(
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regu_data->regulators[i]);
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return -1;
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}
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}
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return 0;
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}
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static int axpdummy_regulator_remove(struct platform_device *pdev)
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{
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struct axpdummy_regulators *regu_data = platform_get_drvdata(pdev);
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int i;
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for (i = 0; i < axpdummy_ldo_count; i++)
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regulator_unregister(regu_data->regulators[i]);
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return 0;
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}
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static const struct of_device_id axpdummy_regu_dt_ids[] = {
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{ .compatible = "axpdummy-regulator", },
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{},
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};
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MODULE_DEVICE_TABLE(of, axpdummy_regu_dt_ids);
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static struct platform_driver axpdummy_regulator_driver = {
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.driver = {
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.name = "axpdummy-regulator",
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.of_match_table = axpdummy_regu_dt_ids,
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},
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.probe = axpdummy_regulator_probe,
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.remove = axpdummy_regulator_remove,
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};
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static int __init axpdummy_regulator_initcall(void)
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{
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int ret;
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ret = platform_driver_register(&axpdummy_regulator_driver);
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if (IS_ERR_VALUE(ret)) {
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pr_err("%s: failed, errno %d\n", __func__, ret);
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return -EINVAL;
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}
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return 0;
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}
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subsys_initcall(axpdummy_regulator_initcall);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("<pannan@allwinnertech.com>");
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MODULE_DESCRIPTION("Regulator Driver for axpdummy PMIC");
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MODULE_ALIAS("platform:axpdummy-regulator");
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