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- // SPDX-License-Identifier: GPL-2.0
- /*
- * AS3711 PMIC regulator driver, using DCDC Step Down and LDO supplies
- *
- * Copyright (C) 2012 Renesas Electronics Corporation
- * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
- */
- #include <linux/err.h>
- #include <linux/init.h>
- #include <linux/mfd/as3711.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/regulator/of_regulator.h>
- #include <linux/slab.h>
- /*
- * The regulator API supports 4 modes of operataion: FAST, NORMAL, IDLE and
- * STANDBY. We map them in the following way to AS3711 SD1-4 DCDC modes:
- * FAST: sdX_fast=1
- * NORMAL: low_noise=1
- * IDLE: low_noise=0
- */
- static int as3711_set_mode_sd(struct regulator_dev *rdev, unsigned int mode)
- {
- unsigned int fast_bit = rdev->desc->enable_mask,
- low_noise_bit = fast_bit << 4;
- u8 val;
- switch (mode) {
- case REGULATOR_MODE_FAST:
- val = fast_bit | low_noise_bit;
- break;
- case REGULATOR_MODE_NORMAL:
- val = low_noise_bit;
- break;
- case REGULATOR_MODE_IDLE:
- val = 0;
- break;
- default:
- return -EINVAL;
- }
- return regmap_update_bits(rdev->regmap, AS3711_SD_CONTROL_1,
- low_noise_bit | fast_bit, val);
- }
- static unsigned int as3711_get_mode_sd(struct regulator_dev *rdev)
- {
- unsigned int fast_bit = rdev->desc->enable_mask,
- low_noise_bit = fast_bit << 4, mask = fast_bit | low_noise_bit;
- unsigned int val;
- int ret = regmap_read(rdev->regmap, AS3711_SD_CONTROL_1, &val);
- if (ret < 0)
- return ret;
- if ((val & mask) == mask)
- return REGULATOR_MODE_FAST;
- if ((val & mask) == low_noise_bit)
- return REGULATOR_MODE_NORMAL;
- if (!(val & mask))
- return REGULATOR_MODE_IDLE;
- return -EINVAL;
- }
- static const struct regulator_ops as3711_sd_ops = {
- .is_enabled = regulator_is_enabled_regmap,
- .enable = regulator_enable_regmap,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .list_voltage = regulator_list_voltage_linear_range,
- .map_voltage = regulator_map_voltage_linear_range,
- .get_mode = as3711_get_mode_sd,
- .set_mode = as3711_set_mode_sd,
- };
- static const struct regulator_ops as3711_aldo_ops = {
- .is_enabled = regulator_is_enabled_regmap,
- .enable = regulator_enable_regmap,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .list_voltage = regulator_list_voltage_linear_range,
- .map_voltage = regulator_map_voltage_linear_range,
- };
- static const struct regulator_ops as3711_dldo_ops = {
- .is_enabled = regulator_is_enabled_regmap,
- .enable = regulator_enable_regmap,
- .disable = regulator_disable_regmap,
- .get_voltage_sel = regulator_get_voltage_sel_regmap,
- .set_voltage_sel = regulator_set_voltage_sel_regmap,
- .list_voltage = regulator_list_voltage_linear_range,
- .map_voltage = regulator_map_voltage_linear_range,
- };
- static const struct regulator_linear_range as3711_sd_ranges[] = {
- REGULATOR_LINEAR_RANGE(612500, 0x1, 0x40, 12500),
- REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000),
- REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7f, 50000),
- };
- static const struct regulator_linear_range as3711_aldo_ranges[] = {
- REGULATOR_LINEAR_RANGE(1200000, 0, 0xf, 50000),
- REGULATOR_LINEAR_RANGE(1800000, 0x10, 0x1f, 100000),
- };
- static const struct regulator_linear_range as3711_dldo_ranges[] = {
- REGULATOR_LINEAR_RANGE(900000, 0, 0x10, 50000),
- REGULATOR_LINEAR_RANGE(1750000, 0x20, 0x3f, 50000),
- };
- #define AS3711_REG(_id, _en_reg, _en_bit, _vmask, _sfx) \
- [AS3711_REGULATOR_ ## _id] = { \
- .name = "as3711-regulator-" # _id, \
- .id = AS3711_REGULATOR_ ## _id, \
- .n_voltages = (_vmask + 1), \
- .ops = &as3711_ ## _sfx ## _ops, \
- .type = REGULATOR_VOLTAGE, \
- .owner = THIS_MODULE, \
- .vsel_reg = AS3711_ ## _id ## _VOLTAGE, \
- .vsel_mask = _vmask, \
- .enable_reg = AS3711_ ## _en_reg, \
- .enable_mask = BIT(_en_bit), \
- .linear_ranges = as3711_ ## _sfx ## _ranges, \
- .n_linear_ranges = ARRAY_SIZE(as3711_ ## _sfx ## _ranges), \
- }
- static const struct regulator_desc as3711_reg_desc[] = {
- AS3711_REG(SD_1, SD_CONTROL, 0, 0x7f, sd),
- AS3711_REG(SD_2, SD_CONTROL, 1, 0x7f, sd),
- AS3711_REG(SD_3, SD_CONTROL, 2, 0x7f, sd),
- AS3711_REG(SD_4, SD_CONTROL, 3, 0x7f, sd),
- AS3711_REG(LDO_1, LDO_1_VOLTAGE, 7, 0x1f, aldo),
- AS3711_REG(LDO_2, LDO_2_VOLTAGE, 7, 0x1f, aldo),
- AS3711_REG(LDO_3, LDO_3_VOLTAGE, 7, 0x3f, dldo),
- AS3711_REG(LDO_4, LDO_4_VOLTAGE, 7, 0x3f, dldo),
- AS3711_REG(LDO_5, LDO_5_VOLTAGE, 7, 0x3f, dldo),
- AS3711_REG(LDO_6, LDO_6_VOLTAGE, 7, 0x3f, dldo),
- AS3711_REG(LDO_7, LDO_7_VOLTAGE, 7, 0x3f, dldo),
- AS3711_REG(LDO_8, LDO_8_VOLTAGE, 7, 0x3f, dldo),
- /* StepUp output voltage depends on supplying regulator */
- };
- #define AS3711_REGULATOR_NUM ARRAY_SIZE(as3711_reg_desc)
- static struct of_regulator_match
- as3711_regulator_matches[AS3711_REGULATOR_NUM] = {
- [AS3711_REGULATOR_SD_1] = { .name = "sd1" },
- [AS3711_REGULATOR_SD_2] = { .name = "sd2" },
- [AS3711_REGULATOR_SD_3] = { .name = "sd3" },
- [AS3711_REGULATOR_SD_4] = { .name = "sd4" },
- [AS3711_REGULATOR_LDO_1] = { .name = "ldo1" },
- [AS3711_REGULATOR_LDO_2] = { .name = "ldo2" },
- [AS3711_REGULATOR_LDO_3] = { .name = "ldo3" },
- [AS3711_REGULATOR_LDO_4] = { .name = "ldo4" },
- [AS3711_REGULATOR_LDO_5] = { .name = "ldo5" },
- [AS3711_REGULATOR_LDO_6] = { .name = "ldo6" },
- [AS3711_REGULATOR_LDO_7] = { .name = "ldo7" },
- [AS3711_REGULATOR_LDO_8] = { .name = "ldo8" },
- };
- static int as3711_regulator_parse_dt(struct device *dev,
- struct device_node **of_node, const int count)
- {
- struct as3711_regulator_pdata *pdata = dev_get_platdata(dev);
- struct device_node *regulators =
- of_get_child_by_name(dev->parent->of_node, "regulators");
- struct of_regulator_match *match;
- int ret, i;
- if (!regulators) {
- dev_err(dev, "regulator node not found\n");
- return -ENODEV;
- }
- ret = of_regulator_match(dev->parent, regulators,
- as3711_regulator_matches, count);
- of_node_put(regulators);
- if (ret < 0) {
- dev_err(dev, "Error parsing regulator init data: %d\n", ret);
- return ret;
- }
- for (i = 0, match = as3711_regulator_matches; i < count; i++, match++)
- if (match->of_node) {
- pdata->init_data[i] = match->init_data;
- of_node[i] = match->of_node;
- }
- return 0;
- }
- static int as3711_regulator_probe(struct platform_device *pdev)
- {
- struct as3711_regulator_pdata *pdata = dev_get_platdata(&pdev->dev);
- struct as3711 *as3711 = dev_get_drvdata(pdev->dev.parent);
- struct regulator_config config = {.dev = &pdev->dev,};
- struct device_node *of_node[AS3711_REGULATOR_NUM] = {};
- struct regulator_dev *rdev;
- int ret;
- int id;
- if (!pdata) {
- dev_err(&pdev->dev, "No platform data...\n");
- return -ENODEV;
- }
- if (pdev->dev.parent->of_node) {
- ret = as3711_regulator_parse_dt(&pdev->dev, of_node, AS3711_REGULATOR_NUM);
- if (ret < 0) {
- dev_err(&pdev->dev, "DT parsing failed: %d\n", ret);
- return ret;
- }
- }
- for (id = 0; id < AS3711_REGULATOR_NUM; id++) {
- config.init_data = pdata->init_data[id];
- config.regmap = as3711->regmap;
- config.of_node = of_node[id];
- rdev = devm_regulator_register(&pdev->dev, &as3711_reg_desc[id],
- &config);
- if (IS_ERR(rdev)) {
- dev_err(&pdev->dev, "Failed to register regulator %s\n",
- as3711_reg_desc[id].name);
- return PTR_ERR(rdev);
- }
- }
- return 0;
- }
- static struct platform_driver as3711_regulator_driver = {
- .driver = {
- .name = "as3711-regulator",
- },
- .probe = as3711_regulator_probe,
- };
- static int __init as3711_regulator_init(void)
- {
- return platform_driver_register(&as3711_regulator_driver);
- }
- subsys_initcall(as3711_regulator_init);
- static void __exit as3711_regulator_exit(void)
- {
- platform_driver_unregister(&as3711_regulator_driver);
- }
- module_exit(as3711_regulator_exit);
- MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
- MODULE_DESCRIPTION("AS3711 regulator driver");
- MODULE_ALIAS("platform:as3711-regulator");
- MODULE_LICENSE("GPL v2");
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