This patch adds new regulator driver to support ACT8945A MFD chip's regulators. The ACT8945A has three step-down DC/DC converters and four low-dropout regulators. Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx> --- drivers/regulator/Kconfig | 7 + drivers/regulator/Makefile | 1 + drivers/regulator/act8945a-regulator.c | 299 ++++++++++++++++++++++++++++++++ 3 files changed, 307 insertions(+) create mode 100644 drivers/regulator/act8945a-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 3904dc0..9a5c950 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -78,6 +78,13 @@ config REGULATOR_ACT8865 This driver controls a active-semi act8865 voltage output regulator via I2C bus. +config REGULATOR_ACT8945A + tristate "Active-semi ACT8945A voltage regulator" + depends on MFD_ACT8945A + help + This driver controls a active-semi ACT8945A voltage regulator + via I2C bus. + config REGULATOR_AD5398 tristate "Analog Devices AD5398/AD5821 regulators" depends on I2C diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 980b194..348cfd7 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o obj-$(CONFIG_REGULATOR_AB3100) += ab3100.o obj-$(CONFIG_REGULATOR_AB8500) += ab8500-ext.o ab8500.o obj-$(CONFIG_REGULATOR_ACT8865) += act8865-regulator.o +obj-$(CONFIG_REGULATOR_ACT8945A) += act8945a-regulator.o obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o arizona-ldo1.o diff --git a/drivers/regulator/act8945a-regulator.c b/drivers/regulator/act8945a-regulator.c new file mode 100644 index 0000000..3912ea3 --- /dev/null +++ b/drivers/regulator/act8945a-regulator.c @@ -0,0 +1,299 @@ +/* + * Voltage regulation driver for active-semi ACT8945A PMICs + * + * Copyright (C) 2015 Atmel Corporation + * Wenyou Yang <wenyou.yang@xxxxxxxxx> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/mfd/act8945a.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/of_regulator.h> + +/** + * ACT8945A Global Register Map. + */ +#define ACT8945A_SYS_MODE 0x00 +#define ACT8945A_SYS_CTRL 0x01 +#define ACT8945A_DCDC1_VSET1 0x20 +#define ACT8945A_DCDC1_VSET2 0x21 +#define ACT8945A_DCDC1_CTRL 0x22 +#define ACT8945A_DCDC2_VSET1 0x30 +#define ACT8945A_DCDC2_VSET2 0x31 +#define ACT8945A_DCDC2_CTRL 0x32 +#define ACT8945A_DCDC3_VSET1 0x40 +#define ACT8945A_DCDC3_VSET2 0x41 +#define ACT8945A_DCDC3_CTRL 0x42 +#define ACT8945A_LDO1_VSET 0x50 +#define ACT8945A_LDO1_CTRL 0x51 +#define ACT8945A_LDO2_VSET 0x54 +#define ACT8945A_LDO2_CTRL 0x55 +#define ACT8945A_LDO3_VSET 0x60 +#define ACT8945A_LDO3_CTRL 0x61 +#define ACT8945A_LDO4_VSET 0x64 +#define ACT8945A_LDO4_CTRL 0x65 + +/** + * Field Definitions. + */ +#define ACT8945A_ENA 0x80 /* ON - [7] */ +#define ACT8945A_VSEL_MASK 0x3F /* VSET - [5:0] */ + +/** + * ACT8945A voltage number + */ +#define ACT8945A_VOLTAGE_NUM 64 + +enum { + ACT8945A_ID_DCDC1, + ACT8945A_ID_DCDC2, + ACT8945A_ID_DCDC3, + ACT8945A_ID_LDO1, + ACT8945A_ID_LDO2, + ACT8945A_ID_LDO3, + ACT8945A_ID_LDO4, + ACT8945A_REG_NUM, +}; + +struct act8945a_regulator_init_data { + int id; + const char *name; + struct regulator_init_data *init_data; +}; + +struct act8945a_pmic_data { + int num_regulators; + struct act8945a_regulator_init_data *regulators; +}; + +struct act8945a_pmic { + struct act8945a_dev *mfd; +}; + +static const struct regulator_linear_range act8945a_voltage_ranges[] = { + REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000), + REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000), + REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), +}; + +static struct regulator_ops act8945a_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, +}; + +#define ACT89xx_REG(_name, _family, _id, _vsel_reg, _supply) \ + [_family##_ID_##_id] = { \ + .name = _name, \ + .supply_name = _supply, \ + .id = _family##_ID_##_id, \ + .type = REGULATOR_VOLTAGE, \ + .ops = &act8945a_ops, \ + .n_voltages = ACT8945A_VOLTAGE_NUM, \ + .linear_ranges = act8945a_voltage_ranges, \ + .n_linear_ranges = ARRAY_SIZE(act8945a_voltage_ranges), \ + .vsel_reg = _family##_##_id##_##_vsel_reg, \ + .vsel_mask = ACT8945A_VSEL_MASK, \ + .enable_reg = _family##_##_id##_CTRL, \ + .enable_mask = ACT8945A_ENA, \ + .owner = THIS_MODULE, \ + } + +static const struct regulator_desc act8945a_regulators[] = { + ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET1, "vp1"), + ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET1, "vp2"), + ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET1, "vp3"), + ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"), + ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"), + ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"), + ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"), +}; + +static const struct regulator_desc act8945a_alt_regulators[] = { + ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET2, "vp1"), + ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET2, "vp2"), + ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET2, "vp3"), + ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"), + ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"), + ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"), + ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"), +}; + +static struct of_regulator_match act8945a_matches[] = { + [ACT8945A_ID_DCDC1] = { .name = "DCDC_REG1"}, + [ACT8945A_ID_DCDC2] = { .name = "DCDC_REG2"}, + [ACT8945A_ID_DCDC3] = { .name = "DCDC_REG3"}, + [ACT8945A_ID_LDO1] = { .name = "LDO_REG1"}, + [ACT8945A_ID_LDO2] = { .name = "LDO_REG2"}, + [ACT8945A_ID_LDO3] = { .name = "LDO_REG3"}, + [ACT8945A_ID_LDO4] = { .name = "LDO_REG4"}, +}; + +static int act8945a_parse_dt_reg_data(struct platform_device *pdev, + struct act8945a_pmic_data *pdata, + struct of_regulator_match **act8945a_reg_matches) +{ + struct device_node *np; + struct of_regulator_match *matches; + struct act8945a_regulator_init_data *regulator; + unsigned int i, num_matches; + int ret; + + np = of_get_child_by_name(pdev->dev.of_node, "regulators"); + if (!np) { + dev_err(&pdev->dev, "regulator node not found\n"); + return -EINVAL; + } + + matches = act8945a_matches; + num_matches = ARRAY_SIZE(act8945a_matches); + + ret = of_regulator_match(&pdev->dev, np, matches, num_matches); + of_node_put(np); + if (ret < 0) { + dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", + ret); + return -EINVAL; + } + + *act8945a_reg_matches = matches; + + pdata->regulators = devm_kzalloc(&pdev->dev, + sizeof(struct act8945a_regulator_init_data) * num_matches, + GFP_KERNEL); + if (!pdata->regulators) + return -ENOMEM; + + pdata->num_regulators = num_matches; + regulator = pdata->regulators; + + for (i = 0; i < num_matches; i++) { + regulator->id = i; + regulator->name = matches[i].name; + regulator->init_data = matches[i].init_data; + regulator++; + } + + return 0; +} + +static struct regulator_init_data *act8945a_get_init_data(int id, + struct act8945a_pmic_data *pdata) +{ + int i; + + if (!pdata) + return NULL; + + for (i = 0; i < pdata->num_regulators; i++) { + if (pdata->regulators[i].id == id) + return pdata->regulators[i].init_data; + } + + return NULL; +} + +static int act8945a_pmic_probe(struct platform_device *pdev) +{ + struct act8945a_dev *act8945a_dev = dev_get_drvdata(pdev->dev.parent); + struct act8945a_pmic *act8945a_pmic; + struct of_regulator_match *act8945a_reg_matches = NULL; + struct regulator_config config = { }; + const struct regulator_desc *regulators, *desc; + struct regulator_dev *rdev; + struct act8945a_pmic_data pmic_data, *pdata; + int i, num_regulators; + int voltage_select = 0; + int ret; + + act8945a_pmic = devm_kzalloc(&pdev->dev, + sizeof(*act8945a_pmic), GFP_KERNEL); + if (!act8945a_pmic) + return -ENOMEM; + + act8945a_pmic->mfd = act8945a_dev; + + ret = act8945a_parse_dt_reg_data(pdev, &pmic_data, + &act8945a_reg_matches); + if (ret < 0) + return ret; + + pdata = &pmic_data; + + voltage_select = !!of_get_property(pdev->dev.of_node, + "active-semi,vsel-high", NULL); + + if (voltage_select) { + regulators = act8945a_alt_regulators; + num_regulators = ARRAY_SIZE(act8945a_alt_regulators); + } else { + regulators = act8945a_regulators; + num_regulators = ARRAY_SIZE(act8945a_regulators); + } + + for (i = 0; i < num_regulators; i++) { + desc = ®ulators[i]; + + config.dev = act8945a_dev->dev; + config.init_data = act8945a_get_init_data(desc->id, pdata); + config.driver_data = act8945a_pmic; + config.regmap = act8945a_dev->regmap; + if (act8945a_reg_matches) + config.of_node = act8945a_reg_matches[i].of_node; + + rdev = devm_regulator_register(&pdev->dev, desc, &config); + if (IS_ERR(rdev)) { + dev_err(act8945a_dev->dev, + "failed to register %s regulator\n", + desc->name); + return PTR_ERR(rdev); + } + + dev_info(act8945a_dev->dev, "%s regulator registered\n", + desc->name); + } + + platform_set_drvdata(pdev, act8945a_dev); + + return 0; +} + +static struct platform_driver act8945a_pmic_driver = { + .driver = { + .name = "act8945a-pmic", + }, + .probe = act8945a_pmic_probe, +}; + +static int __init act8945a_pmic_init(void) +{ + return platform_driver_register(&act8945a_pmic_driver); +} +subsys_initcall(act8945a_pmic_init); + +static void __exit act8945a_pmic_cleanup(void) +{ + platform_driver_unregister(&act8945a_pmic_driver); +} +module_exit(act8945a_pmic_cleanup); + +MODULE_DESCRIPTION("Active-semi ACT8945A voltage regulator driver"); +MODULE_AUTHOR("Wenyou Yang <wenyou.yang@xxxxxxxxx>"); +MODULE_LICENSE("GPL v2"); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html