diff options
Diffstat (limited to 'drivers/regulator/arizona-ldo1.c')
| -rw-r--r-- | drivers/regulator/arizona-ldo1.c | 420 |
1 files changed, 420 insertions, 0 deletions
diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c new file mode 100644 index 000000000..b465c0010 --- /dev/null +++ b/drivers/regulator/arizona-ldo1.c @@ -0,0 +1,420 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// arizona-ldo1.c -- LDO1 supply for Arizona devices +// +// Copyright 2012 Wolfson Microelectronics PLC. +// +// Author: Mark Brown <broonie@opensource.wolfsonmicro.com> + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/bitops.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/gpio/consumer.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/of_regulator.h> +#include <linux/slab.h> + +#include <linux/regulator/arizona-ldo1.h> + +#include <linux/mfd/arizona/core.h> +#include <linux/mfd/arizona/pdata.h> +#include <linux/mfd/arizona/registers.h> + +#include <linux/mfd/madera/core.h> +#include <linux/mfd/madera/pdata.h> +#include <linux/mfd/madera/registers.h> + +struct arizona_ldo1 { + struct regulator_dev *regulator; + struct regmap *regmap; + + struct regulator_consumer_supply supply; + struct regulator_init_data init_data; + + struct gpio_desc *ena_gpiod; +}; + +static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev, + unsigned sel) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int val; + int ret; + + if (sel == rdev->desc->n_voltages - 1) + val = ARIZONA_LDO1_HI_PWR; + else + val = 0; + + ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2, + ARIZONA_LDO1_HI_PWR, val); + if (ret != 0) + return ret; + + if (val) + return 0; + + return regulator_set_voltage_sel_regmap(rdev, sel); +} + +static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev) +{ + struct regmap *regmap = rdev_get_regmap(rdev); + unsigned int val; + int ret; + + ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val); + if (ret != 0) + return ret; + + if (val & ARIZONA_LDO1_HI_PWR) + return rdev->desc->n_voltages - 1; + + return regulator_get_voltage_sel_regmap(rdev); +} + +static const struct regulator_ops arizona_ldo1_hc_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .get_voltage_sel = arizona_ldo1_hc_get_voltage_sel, + .set_voltage_sel = arizona_ldo1_hc_set_voltage_sel, + .get_bypass = regulator_get_bypass_regmap, + .set_bypass = regulator_set_bypass_regmap, +}; + +static const struct linear_range arizona_ldo1_hc_ranges[] = { + REGULATOR_LINEAR_RANGE(900000, 0, 0x6, 50000), + REGULATOR_LINEAR_RANGE(1800000, 0x7, 0x7, 0), +}; + +static const struct regulator_desc arizona_ldo1_hc = { + .name = "LDO1", + .supply_name = "LDOVDD", + .type = REGULATOR_VOLTAGE, + .ops = &arizona_ldo1_hc_ops, + + .vsel_reg = ARIZONA_LDO1_CONTROL_1, + .vsel_mask = ARIZONA_LDO1_VSEL_MASK, + .bypass_reg = ARIZONA_LDO1_CONTROL_1, + .bypass_mask = ARIZONA_LDO1_BYPASS, + .linear_ranges = arizona_ldo1_hc_ranges, + .n_linear_ranges = ARRAY_SIZE(arizona_ldo1_hc_ranges), + .n_voltages = 8, + .enable_time = 1500, + .ramp_delay = 24000, + + .owner = THIS_MODULE, +}; + +static const struct regulator_ops arizona_ldo1_ops = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, +}; + +static const struct regulator_desc arizona_ldo1 = { + .name = "LDO1", + .supply_name = "LDOVDD", + .type = REGULATOR_VOLTAGE, + .ops = &arizona_ldo1_ops, + + .vsel_reg = ARIZONA_LDO1_CONTROL_1, + .vsel_mask = ARIZONA_LDO1_VSEL_MASK, + .min_uV = 900000, + .uV_step = 25000, + .n_voltages = 13, + .enable_time = 500, + .ramp_delay = 24000, + + .owner = THIS_MODULE, +}; + +static const struct regulator_init_data arizona_ldo1_dvfs = { + .constraints = { + .min_uV = 1200000, + .max_uV = 1800000, + .valid_ops_mask = REGULATOR_CHANGE_STATUS | + REGULATOR_CHANGE_VOLTAGE, + }, + .num_consumer_supplies = 1, +}; + +static const struct regulator_init_data arizona_ldo1_default = { + .constraints = { + .valid_ops_mask = REGULATOR_CHANGE_STATUS, + }, + .num_consumer_supplies = 1, +}; + +static const struct regulator_init_data arizona_ldo1_wm5110 = { + .constraints = { + .min_uV = 1175000, + .max_uV = 1200000, + .valid_ops_mask = REGULATOR_CHANGE_STATUS | + REGULATOR_CHANGE_VOLTAGE, + }, + .num_consumer_supplies = 1, +}; + +static const struct regulator_desc madera_ldo1 = { + .name = "LDO1", + .supply_name = "LDOVDD", + .type = REGULATOR_VOLTAGE, + .ops = &arizona_ldo1_ops, + + .vsel_reg = MADERA_LDO1_CONTROL_1, + .vsel_mask = MADERA_LDO1_VSEL_MASK, + .min_uV = 900000, + .uV_step = 25000, + .n_voltages = 13, + .enable_time = 3000, + + .owner = THIS_MODULE, +}; + +static const struct regulator_init_data madera_ldo1_default = { + .constraints = { + .min_uV = 1200000, + .max_uV = 1200000, + .valid_ops_mask = REGULATOR_CHANGE_STATUS, + }, + .num_consumer_supplies = 1, +}; + +static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata, + struct regulator_config *config, + const struct regulator_desc *desc, + bool *external_dcvdd) +{ + struct arizona_ldo1 *ldo1 = config->driver_data; + struct device_node *np = config->dev->of_node; + struct device_node *init_node, *dcvdd_node; + struct regulator_init_data *init_data; + + init_node = of_get_child_by_name(np, "ldo1"); + dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0); + + if (init_node) { + config->of_node = init_node; + + init_data = of_get_regulator_init_data(config->dev, init_node, + desc); + if (init_data) { + init_data->consumer_supplies = &ldo1->supply; + init_data->num_consumer_supplies = 1; + + if (dcvdd_node && dcvdd_node != init_node) + *external_dcvdd = true; + + pdata->init_data = init_data; + } + } else if (dcvdd_node) { + *external_dcvdd = true; + } + + of_node_put(dcvdd_node); + + return 0; +} + +static int arizona_ldo1_common_init(struct platform_device *pdev, + struct arizona_ldo1 *ldo1, + const struct regulator_desc *desc, + struct arizona_ldo1_pdata *pdata, + bool *external_dcvdd) +{ + struct device *parent_dev = pdev->dev.parent; + struct regulator_config config = { }; + int ret; + + *external_dcvdd = false; + + ldo1->supply.supply = "DCVDD"; + ldo1->init_data.consumer_supplies = &ldo1->supply; + ldo1->supply.dev_name = dev_name(parent_dev); + + config.dev = parent_dev; + config.driver_data = ldo1; + config.regmap = ldo1->regmap; + + if (IS_ENABLED(CONFIG_OF)) { + if (!dev_get_platdata(parent_dev)) { + ret = arizona_ldo1_of_get_pdata(pdata, + &config, desc, + external_dcvdd); + if (ret < 0) + return ret; + } + } + + /* We assume that high output = regulator off + * Don't use devm, since we need to get against the parent device + * so clean up would happen at the wrong time + */ + config.ena_gpiod = gpiod_get_optional(parent_dev, "wlf,ldoena", + GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE); + if (IS_ERR(config.ena_gpiod)) + return PTR_ERR(config.ena_gpiod); + + ldo1->ena_gpiod = config.ena_gpiod; + + if (pdata->init_data) + config.init_data = pdata->init_data; + else + config.init_data = &ldo1->init_data; + + /* + * LDO1 can only be used to supply DCVDD so if it has no + * consumers then DCVDD is supplied externally. + */ + if (config.init_data->num_consumer_supplies == 0) + *external_dcvdd = true; + + ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config); + + of_node_put(config.of_node); + + if (IS_ERR(ldo1->regulator)) { + ret = PTR_ERR(ldo1->regulator); + dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n", + ret); + return ret; + } + + platform_set_drvdata(pdev, ldo1); + + return 0; +} + +static int arizona_ldo1_probe(struct platform_device *pdev) +{ + struct arizona *arizona = dev_get_drvdata(pdev->dev.parent); + struct arizona_ldo1 *ldo1; + const struct regulator_desc *desc; + bool external_dcvdd; + int ret; + + ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); + if (!ldo1) + return -ENOMEM; + + ldo1->regmap = arizona->regmap; + + /* + * Since the chip usually supplies itself we provide some + * default init_data for it. This will be overridden with + * platform data if provided. + */ + switch (arizona->type) { + case WM5102: + case WM8997: + case WM8998: + case WM1814: + desc = &arizona_ldo1_hc; + ldo1->init_data = arizona_ldo1_dvfs; + break; + case WM5110: + case WM8280: + desc = &arizona_ldo1; + ldo1->init_data = arizona_ldo1_wm5110; + break; + default: + desc = &arizona_ldo1; + ldo1->init_data = arizona_ldo1_default; + break; + } + + ret = arizona_ldo1_common_init(pdev, ldo1, desc, + &arizona->pdata.ldo1, + &external_dcvdd); + if (ret == 0) + arizona->external_dcvdd = external_dcvdd; + + return ret; +} + +static int arizona_ldo1_remove(struct platform_device *pdev) +{ + struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev); + + if (ldo1->ena_gpiod) + gpiod_put(ldo1->ena_gpiod); + + return 0; +} + +static int madera_ldo1_probe(struct platform_device *pdev) +{ + struct madera *madera = dev_get_drvdata(pdev->dev.parent); + struct arizona_ldo1 *ldo1; + bool external_dcvdd; + int ret; + + ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL); + if (!ldo1) + return -ENOMEM; + + ldo1->regmap = madera->regmap; + + ldo1->init_data = madera_ldo1_default; + + ret = arizona_ldo1_common_init(pdev, ldo1, &madera_ldo1, + &madera->pdata.ldo1, + &external_dcvdd); + if (ret) + return ret; + + madera->internal_dcvdd = !external_dcvdd; + + return 0; +} + +static struct platform_driver arizona_ldo1_driver = { + .probe = arizona_ldo1_probe, + .remove = arizona_ldo1_remove, + .driver = { + .name = "arizona-ldo1", + .probe_type = PROBE_FORCE_SYNCHRONOUS, + }, +}; + +static struct platform_driver madera_ldo1_driver = { + .probe = madera_ldo1_probe, + .remove = arizona_ldo1_remove, + .driver = { + .name = "madera-ldo1", + .probe_type = PROBE_FORCE_SYNCHRONOUS, + }, +}; + +static struct platform_driver * const madera_ldo1_drivers[] = { + &arizona_ldo1_driver, + &madera_ldo1_driver, +}; + +static int __init arizona_ldo1_init(void) +{ + return platform_register_drivers(madera_ldo1_drivers, + ARRAY_SIZE(madera_ldo1_drivers)); +} +module_init(arizona_ldo1_init); + +static void __exit madera_ldo1_exit(void) +{ + platform_unregister_drivers(madera_ldo1_drivers, + ARRAY_SIZE(madera_ldo1_drivers)); +} +module_exit(madera_ldo1_exit); + +/* Module information */ +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_DESCRIPTION("Arizona LDO1 driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:arizona-ldo1"); +MODULE_ALIAS("platform:madera-ldo1"); |