From e6f2f805d722bf94efe89755372bcc6ff60d8d90 Mon Sep 17 00:00:00 2001 From: Javier Martinez Canillas Date: Mon, 18 Aug 2014 10:32:41 +0200 Subject: regulator: Add driver for max77802 PMIC PMIC regulators The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout (LDO) regulators. This patch adds support for all these regulators found on the MAX77802 PMIC and is based on a driver added by Simon Glass to the Chrome OS kernel 3.8 tree. Signed-off-by: Javier Martinez Canillas Tested-by: Naveen Krishna Chatradhi Signed-off-by: Mark Brown diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 2dc8289..8134a99 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -387,6 +387,15 @@ config REGULATOR_MAX77693 and one current regulator 'CHARGER'. This is suitable for Exynos-4x12 chips. +config REGULATOR_MAX77802 + tristate "Maxim 77802 regulator" + depends on MFD_MAX77686 + help + This driver controls a Maxim 77802 regulator + via I2C bus. The provided regulator is suitable for + Exynos5420/Exynos5800 SoCs to control various voltages. + It includes support for control of voltage and ramp speed. + config REGULATOR_MC13XXX_CORE tristate diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index aa4a6aa..b4ec6c8 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -52,6 +52,7 @@ obj-$(CONFIG_REGULATOR_MAX8997) += max8997.o obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o obj-$(CONFIG_REGULATOR_MAX77686) += max77686.o obj-$(CONFIG_REGULATOR_MAX77693) += max77693.o +obj-$(CONFIG_REGULATOR_MAX77802) += max77802.o obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o diff --git a/drivers/regulator/max77802.c b/drivers/regulator/max77802.c new file mode 100644 index 0000000..5f022f8 --- /dev/null +++ b/drivers/regulator/max77802.c @@ -0,0 +1,578 @@ +/* + * max77802.c - Regulator driver for the Maxim 77802 + * + * Copyright (C) 2013-2014 Google, Inc + * Simon Glass + * + * Copyright (C) 2012 Samsung Electronics + * Chiwoong Byun + * Jonghwa Lee + * + * 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. + * + * This driver is based on max8997.c + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Default ramp delay in case it is not manually set */ +#define MAX77802_RAMP_DELAY 100000 /* uV/us */ + +#define MAX77802_OPMODE_SHIFT_LDO 6 +#define MAX77802_OPMODE_BUCK234_SHIFT 4 +#define MAX77802_OPMODE_MASK 0x3 + +#define MAX77802_VSEL_MASK 0x3F +#define MAX77802_DVS_VSEL_MASK 0xFF + +#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0 +#define MAX77802_RAMP_RATE_SHIFT_2BIT 6 +#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0 +#define MAX77802_RAMP_RATE_SHIFT_4BIT 4 + +/* MAX77802 has two register formats: 2-bit and 4-bit */ +static const unsigned int ramp_table_77802_2bit[] = { + 12500, + 25000, + 50000, + 100000, +}; + +static unsigned int ramp_table_77802_4bit[] = { + 1000, 2000, 3030, 4000, + 5000, 5880, 7140, 8330, + 9090, 10000, 11110, 12500, + 16670, 25000, 50000, 100000, +}; + +struct max77802_regulator_prv { + int num_regulators; + struct regulator_dev *rdev[MAX77802_REG_MAX]; + unsigned int opmode[MAX77802_REG_MAX]; +}; + +static int max77802_get_opmode_shift(int id) +{ + if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 && + id <= MAX77802_BUCK10)) + return 0; + + if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4) + return MAX77802_OPMODE_BUCK234_SHIFT; + + if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35) + return MAX77802_OPMODE_SHIFT_LDO; + + return -EINVAL; +} + +/* + * Some BUCKS supports Normal[ON/OFF] mode during suspend + * + * BUCK 1, 6, 2-4, 5, 7-10 (all) + * + * The other mode (0x02) will make PWRREQ switch between normal + * and low power. + */ +static int max77802_buck_set_suspend_disable(struct regulator_dev *rdev) +{ + unsigned int val = MAX77802_OPMODE_STANDBY; + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + int shift = max77802_get_opmode_shift(id); + + max77802->opmode[id] = val; + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, val << shift); +} + +/* + * Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state + * (Enable Control Logic1 by PWRREQ) + * + * LDOs 2, 4-19, 22-35. + * + */ +static int max77802_ldo_set_suspend_mode_logic1(struct regulator_dev *rdev, + unsigned int mode) +{ + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + unsigned int val; + int shift = max77802_get_opmode_shift(id); + + switch (mode) { + case REGULATOR_MODE_IDLE: /* ON in LP Mode */ + val = MAX77802_OPMODE_LP; + break; + case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ + val = MAX77802_OPMODE_NORMAL; + break; + case REGULATOR_MODE_STANDBY: /* ON/OFF by PWRREQ */ + val = MAX77802_OPMODE_STANDBY; + break; + default: + dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", + rdev->desc->name, mode); + return -EINVAL; + } + + max77802->opmode[rdev_get_id(rdev)] = val; + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, val << shift); +} + +/* + * Mode 1 (Output[ON/OFF] by PWRREQ) is not supported on some LDOs + * (Enable Control Logic2 by PWRREQ) + * + * LDOs 1, 20, 21, and 3, + * + */ +static int max77802_ldo_set_suspend_mode_logic2(struct regulator_dev *rdev, + unsigned int mode) +{ + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + unsigned int val; + int shift = max77802_get_opmode_shift(id); + + switch (mode) { + case REGULATOR_MODE_IDLE: /* ON in LP Mode */ + val = MAX77802_OPMODE_LP; + break; + case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ + val = MAX77802_OPMODE_NORMAL; + break; + default: + dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", + rdev->desc->name, mode); + return -EINVAL; + } + + max77802->opmode[rdev_get_id(rdev)] = val; + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, val << shift); +} + +static int max77802_enable(struct regulator_dev *rdev) +{ + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + int shift = max77802_get_opmode_shift(id); + + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, + max77802->opmode[id] << shift); +} + +static int max77802_find_ramp_value(struct regulator_dev *rdev, + const unsigned int limits[], int size, + unsigned int ramp_delay) +{ + int i; + + for (i = 0; i < size; i++) { + if (ramp_delay <= limits[i]) + return i; + } + + /* Use maximum value for no ramp control */ + dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n", + rdev->desc->name, ramp_delay); + return size - 1; +} + +/* Used for BUCKs 2-4 */ +static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev, + int ramp_delay) +{ + int id = rdev_get_id(rdev); + unsigned int ramp_value; + + if (id > MAX77802_BUCK4) { + dev_warn(&rdev->dev, + "%s: regulator: ramp delay not supported\n", + rdev->desc->name); + return -EINVAL; + } + ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit, + ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay); + + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + MAX77802_RAMP_RATE_MASK_2BIT, + ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT); +} + +/* For BUCK1, 6 */ +static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev, + int ramp_delay) +{ + unsigned int ramp_value; + + ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit, + ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay); + + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + MAX77802_RAMP_RATE_MASK_4BIT, + ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT); +} + +/* + * LDOs 2, 4-19, 22-35 + */ +static struct regulator_ops max77802_ldo_ops_logic1 = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = max77802_enable, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_suspend_mode = max77802_ldo_set_suspend_mode_logic1, +}; + +/* + * LDOs 1, 20, 21, 3 + */ +static struct regulator_ops max77802_ldo_ops_logic2 = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = max77802_enable, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_suspend_mode = max77802_ldo_set_suspend_mode_logic2, +}; + +/* BUCKS 1, 6 */ +static struct regulator_ops max77802_buck_16_dvs_ops = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = max77802_enable, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_ramp_delay = max77802_set_ramp_delay_4bit, + .set_suspend_disable = max77802_buck_set_suspend_disable, +}; + +/* BUCKs 2-4, 5, 7-10 */ +static struct regulator_ops max77802_buck_dvs_ops = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = max77802_enable, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_ramp_delay = max77802_set_ramp_delay_2bit, + .set_suspend_disable = max77802_buck_set_suspend_disable, +}; + +/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */ +#define regulator_77802_desc_p_ldo(num, supply, log) { \ + .name = "LDO"#num, \ + .id = MAX77802_LDO##num, \ + .supply_name = "inl"#supply, \ + .ops = &max77802_ldo_ops_logic##log, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 800000, \ + .uV_step = 50000, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 1 << 6, \ + .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ + .vsel_mask = MAX77802_VSEL_MASK, \ + .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ + .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ +} + +/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */ +#define regulator_77802_desc_n_ldo(num, supply, log) { \ + .name = "LDO"#num, \ + .id = MAX77802_LDO##num, \ + .supply_name = "inl"#supply, \ + .ops = &max77802_ldo_ops_logic##log, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 800000, \ + .uV_step = 25000, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 1 << 6, \ + .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ + .vsel_mask = MAX77802_VSEL_MASK, \ + .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ + .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ +} + +/* BUCKs 1, 6 */ +#define regulator_77802_desc_16_buck(num) { \ + .name = "BUCK"#num, \ + .id = MAX77802_BUCK##num, \ + .supply_name = "inb"#num, \ + .ops = &max77802_buck_16_dvs_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 612500, \ + .uV_step = 6250, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 1 << 8, \ + .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ + .vsel_mask = MAX77802_DVS_VSEL_MASK, \ + .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \ + .enable_mask = MAX77802_OPMODE_MASK, \ +} + +/* BUCKS 2-4 */ +#define regulator_77802_desc_234_buck(num) { \ + .name = "BUCK"#num, \ + .id = MAX77802_BUCK##num, \ + .supply_name = "inb"#num, \ + .ops = &max77802_buck_dvs_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 600000, \ + .uV_step = 6250, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 0x91, \ + .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ + .vsel_mask = MAX77802_DVS_VSEL_MASK, \ + .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ + .enable_mask = MAX77802_OPMODE_MASK << \ + MAX77802_OPMODE_BUCK234_SHIFT, \ +} + +/* BUCK 5 */ +#define regulator_77802_desc_buck5(num) { \ + .name = "BUCK"#num, \ + .id = MAX77802_BUCK##num, \ + .supply_name = "inb"#num, \ + .ops = &max77802_buck_dvs_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 750000, \ + .uV_step = 50000, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 1 << 6, \ + .vsel_reg = MAX77802_REG_BUCK5OUT, \ + .vsel_mask = MAX77802_VSEL_MASK, \ + .enable_reg = MAX77802_REG_BUCK5CTRL, \ + .enable_mask = MAX77802_OPMODE_MASK, \ +} + +/* BUCKs 7-10 */ +#define regulator_77802_desc_buck7_10(num) { \ + .name = "BUCK"#num, \ + .id = MAX77802_BUCK##num, \ + .supply_name = "inb"#num, \ + .ops = &max77802_buck_dvs_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 750000, \ + .uV_step = 50000, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 1 << 6, \ + .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \ + .vsel_mask = MAX77802_VSEL_MASK, \ + .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \ + .enable_mask = MAX77802_OPMODE_MASK, \ +} + +static struct regulator_desc regulators[] = { + regulator_77802_desc_16_buck(1), + regulator_77802_desc_234_buck(2), + regulator_77802_desc_234_buck(3), + regulator_77802_desc_234_buck(4), + regulator_77802_desc_buck5(5), + regulator_77802_desc_16_buck(6), + regulator_77802_desc_buck7_10(7), + regulator_77802_desc_buck7_10(8), + regulator_77802_desc_buck7_10(9), + regulator_77802_desc_buck7_10(10), + regulator_77802_desc_n_ldo(1, 10, 2), + regulator_77802_desc_n_ldo(2, 10, 1), + regulator_77802_desc_p_ldo(3, 3, 2), + regulator_77802_desc_p_ldo(4, 6, 1), + regulator_77802_desc_p_ldo(5, 3, 1), + regulator_77802_desc_p_ldo(6, 3, 1), + regulator_77802_desc_p_ldo(7, 3, 1), + regulator_77802_desc_n_ldo(8, 1, 1), + regulator_77802_desc_p_ldo(9, 5, 1), + regulator_77802_desc_p_ldo(10, 4, 1), + regulator_77802_desc_p_ldo(11, 4, 1), + regulator_77802_desc_p_ldo(12, 9, 1), + regulator_77802_desc_p_ldo(13, 4, 1), + regulator_77802_desc_p_ldo(14, 4, 1), + regulator_77802_desc_n_ldo(15, 1, 1), + regulator_77802_desc_n_ldo(17, 2, 1), + regulator_77802_desc_p_ldo(18, 7, 1), + regulator_77802_desc_p_ldo(19, 5, 1), + regulator_77802_desc_p_ldo(20, 7, 2), + regulator_77802_desc_p_ldo(21, 6, 2), + regulator_77802_desc_p_ldo(23, 9, 1), + regulator_77802_desc_p_ldo(24, 6, 1), + regulator_77802_desc_p_ldo(25, 9, 1), + regulator_77802_desc_p_ldo(26, 9, 1), + regulator_77802_desc_n_ldo(27, 2, 1), + regulator_77802_desc_p_ldo(28, 7, 1), + regulator_77802_desc_p_ldo(29, 7, 1), + regulator_77802_desc_n_ldo(30, 2, 1), + regulator_77802_desc_p_ldo(32, 9, 1), + regulator_77802_desc_p_ldo(33, 6, 1), + regulator_77802_desc_p_ldo(34, 9, 1), + regulator_77802_desc_n_ldo(35, 2, 1), +}; + +#ifdef CONFIG_OF +static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, + struct max77686_platform_data *pdata) +{ + struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); + struct device_node *pmic_np, *regulators_np; + struct max77686_regulator_data *rdata; + struct of_regulator_match rmatch; + unsigned int i; + + pmic_np = iodev->dev->of_node; + regulators_np = of_get_child_by_name(pmic_np, "regulators"); + if (!regulators_np) { + dev_err(&pdev->dev, "could not find regulators sub-node\n"); + return -EINVAL; + } + + pdata->num_regulators = ARRAY_SIZE(regulators); + rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) * + pdata->num_regulators, GFP_KERNEL); + if (!rdata) { + of_node_put(regulators_np); + return -ENOMEM; + } + + for (i = 0; i < pdata->num_regulators; i++) { + rmatch.name = regulators[i].name; + rmatch.init_data = NULL; + rmatch.of_node = NULL; + if (of_regulator_match(&pdev->dev, regulators_np, &rmatch, + 1) != 1) { + dev_warn(&pdev->dev, "No matching regulator for '%s'\n", + rmatch.name); + continue; + } + rdata[i].initdata = rmatch.init_data; + rdata[i].of_node = rmatch.of_node; + rdata[i].id = regulators[i].id; + } + + pdata->regulators = rdata; + of_node_put(regulators_np); + + return 0; +} +#else +static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, + struct max77686_platform_data *pdata) +{ + return 0; +} +#endif /* CONFIG_OF */ + +static int max77802_pmic_probe(struct platform_device *pdev) +{ + struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); + struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev); + struct max77802_regulator_prv *max77802; + int i, ret = 0, val; + struct regulator_config config = { }; + + /* This is allocated by the MFD driver */ + if (!pdata) { + dev_err(&pdev->dev, "no platform data found for regulator\n"); + return -ENODEV; + } + + max77802 = devm_kzalloc(&pdev->dev, + sizeof(struct max77802_regulator_prv), + GFP_KERNEL); + if (!max77802) + return -ENOMEM; + + if (iodev->dev->of_node) { + ret = max77802_pmic_dt_parse_pdata(pdev, pdata); + if (ret) + return ret; + } + + config.dev = iodev->dev; + config.regmap = iodev->regmap; + config.driver_data = max77802; + platform_set_drvdata(pdev, max77802); + + for (i = 0; i < MAX77802_REG_MAX; i++) { + struct regulator_dev *rdev; + int id = pdata->regulators[i].id; + int shift = max77802_get_opmode_shift(id); + + config.init_data = pdata->regulators[i].initdata; + config.of_node = pdata->regulators[i].of_node; + + ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); + max77802->opmode[id] = val >> shift & MAX77802_OPMODE_MASK; + + rdev = devm_regulator_register(&pdev->dev, + ®ulators[i], &config); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, + "regulator init failed for %d\n", i); + return PTR_ERR(rdev); + } + } + + return 0; +} + +static const struct platform_device_id max77802_pmic_id[] = { + {"max77802-pmic", 0}, + { }, +}; +MODULE_DEVICE_TABLE(platform, max77802_pmic_id); + +static struct platform_driver max77802_pmic_driver = { + .driver = { + .name = "max77802-pmic", + .owner = THIS_MODULE, + }, + .probe = max77802_pmic_probe, + .id_table = max77802_pmic_id, +}; + +module_platform_driver(max77802_pmic_driver); + +MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver"); +MODULE_AUTHOR("Simon Glass "); +MODULE_LICENSE("GPL"); -- cgit v0.10.2 From 4ece7045eb7cceaff9667b4ee2eec78915d3ee3b Mon Sep 17 00:00:00 2001 From: Javier Martinez Canillas Date: Mon, 18 Aug 2014 10:32:42 +0200 Subject: regulator: Add DT bindings for max77802 PMIC regulators Add Device Tree binding documentation for the regulators present in the Maxim 77802 Power Management IC. Signed-off-by: Javier Martinez Canillas Signed-off-by: Mark Brown diff --git a/Documentation/devicetree/bindings/regulator/max77802.txt b/Documentation/devicetree/bindings/regulator/max77802.txt new file mode 100644 index 0000000..5aeaffc --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/max77802.txt @@ -0,0 +1,53 @@ +Binding for Maxim MAX77802 regulators + +This is a part of device tree bindings of MAX77802 multi-function device. +More information can be found in bindings/mfd/max77802.txt file. + +The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout (LDO) +regulators that can be controlled over I2C. + +Following properties should be present in main device node of the MFD chip. + +Optional node: +- regulators : The regulators of max77802 have to be instantiated + under subnode named "regulators" using the following format. + + regulator-name { + standard regulator constraints.... + }; + refer Documentation/devicetree/bindings/regulator/regulator.txt + +The regulator node name should be initialized with a string to get matched +with their hardware counterparts as follow. The valid names are: + + -LDOn : for LDOs, where n can lie in ranges 1-15, 17-21, 23-30 + and 32-35. + example: LDO1, LDO2, LDO35. + -BUCKn : for BUCKs, where n can lie in range 1 to 10. + example: BUCK1, BUCK5, BUCK10. +Example: + + max77802@09 { + compatible = "maxim,max77802"; + interrupt-parent = <&wakeup_eint>; + interrupts = <26 0>; + reg = <0x09>; + #address-cells = <1>; + #size-cells = <0>; + + regulators { + ldo11_reg: LDO11 { + regulator-name = "vdd_ldo11"; + regulator-min-microvolt = <1900000>; + regulator-max-microvolt = <1900000>; + regulator-always-on; + }; + + buck1_reg: BUCK1 { + regulator-name = "vdd_mif"; + regulator-min-microvolt = <950000>; + regulator-max-microvolt = <1300000>; + regulator-always-on; + regulator-boot-on; + }; + }; -- cgit v0.10.2 From 29b9c318025bece77d019eada2dee856e3ca50b2 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Wed, 20 Aug 2014 10:04:17 +0800 Subject: regulator: max77802: Remove unused fields from struct max77802_regulator_prv Both num_regulators and *rdev[MAX77802_REG_MAX] are not used, remove them. Signed-off-by: Axel Lin Signed-off-by: Mark Brown diff --git a/drivers/regulator/max77802.c b/drivers/regulator/max77802.c index 5f022f8..ad1caa9 100644 --- a/drivers/regulator/max77802.c +++ b/drivers/regulator/max77802.c @@ -65,8 +65,6 @@ static unsigned int ramp_table_77802_4bit[] = { }; struct max77802_regulator_prv { - int num_regulators; - struct regulator_dev *rdev[MAX77802_REG_MAX]; unsigned int opmode[MAX77802_REG_MAX]; }; -- cgit v0.10.2 From aea8dfb9f32bf90dd6fd00758978b50efdc08df5 Mon Sep 17 00:00:00 2001 From: Javier Martinez Canillas Date: Tue, 26 Aug 2014 13:37:41 +0200 Subject: regulator: max77802: set opmode to normal if off is read from hw The max77802 driver reads the default operating mode (opmode) set for regulators when enabled from the hardware registers. But if a regulator is disabled and the system warm restarted, the hardware reports OFF as the opmode so the regulator is not enabled. Default to operating mode NORMAL if OFF is read from the hardware register. Reported-by: Yuvaraj Cd Signed-off-by: Javier Martinez Canillas Reviewed-by: Doug Anderson Tested-by: Yuvaraj Kumar CD Signed-off-by: Mark Brown diff --git a/drivers/regulator/max77802.c b/drivers/regulator/max77802.c index ad1caa9..967e109 100644 --- a/drivers/regulator/max77802.c +++ b/drivers/regulator/max77802.c @@ -540,7 +540,17 @@ static int max77802_pmic_probe(struct platform_device *pdev) config.of_node = pdata->regulators[i].of_node; ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); - max77802->opmode[id] = val >> shift & MAX77802_OPMODE_MASK; + val = val >> shift & MAX77802_OPMODE_MASK; + + /* + * If the regulator is disabled and the system warm rebooted, + * the hardware reports OFF as the regulator operating mode. + * Default to operating mode NORMAL in that case. + */ + if (val == MAX77802_OPMODE_OFF) + max77802->opmode[id] = MAX77802_OPMODE_NORMAL; + else + max77802->opmode[id] = val; rdev = devm_regulator_register(&pdev->dev, ®ulators[i], &config); -- cgit v0.10.2 From 4e00517945bed110f1b8de580cce97626e9ef0b5 Mon Sep 17 00:00:00 2001 From: Robert Jarzmik Date: Sun, 31 Aug 2014 21:10:51 +0200 Subject: regulator: max1586: add device-tree support Add device-tree support to max1586. The driver can still be used with the legacy platform data, or the new device-tree way. This work is heavily inspired by the device-tree support of its cousin max8660 driver. Signed-off-by: Robert Jarzmik Signed-off-by: Mark Brown diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c index d23d057..5c04a71 100644 --- a/drivers/regulator/max1586.c +++ b/drivers/regulator/max1586.c @@ -24,6 +24,8 @@ #include #include #include +#include +#include #define MAX1586_V3_MAX_VSEL 31 #define MAX1586_V6_MAX_VSEL 3 @@ -157,13 +159,87 @@ static struct regulator_desc max1586_reg[] = { }, }; +int of_get_max1586_platform_data(struct device *dev, + struct max1586_platform_data *pdata) +{ + struct max1586_subdev_data *sub; + struct of_regulator_match rmatch[ARRAY_SIZE(max1586_reg)]; + struct device_node *np = dev->of_node; + int i, matched; + + if (of_property_read_u32(np, "v3-gain", + &pdata->v3_gain) < 0) { + dev_err(dev, "%s has no 'v3-gain' property\n", np->full_name); + return -EINVAL; + } + + np = of_get_child_by_name(np, "regulators"); + if (!np) { + dev_err(dev, "missing 'regulators' subnode in DT\n"); + return -EINVAL; + } + + for (i = 0; i < ARRAY_SIZE(rmatch); i++) + rmatch[i].name = max1586_reg[i].name; + + matched = of_regulator_match(dev, np, rmatch, ARRAY_SIZE(rmatch)); + of_node_put(np); + /* + * If matched is 0, ie. neither Output_V3 nor Output_V6 have been found, + * return 0, which signals the normal situation where no subregulator is + * available. This is normal because the max1586 doesn't provide any + * readback support, so the subregulators can't report any status + * anyway. If matched < 0, return the error. + */ + if (matched <= 0) + return matched; + + pdata->subdevs = devm_kzalloc(dev, sizeof(struct max1586_subdev_data) * + matched, GFP_KERNEL); + if (!pdata->subdevs) + return -ENOMEM; + + pdata->num_subdevs = matched; + sub = pdata->subdevs; + + for (i = 0; i < matched; i++) { + sub->id = i; + sub->name = rmatch[i].of_node->name; + sub->platform_data = rmatch[i].init_data; + sub++; + } + + return 0; +} + +static const struct of_device_id max1586_of_match[] = { + { .compatible = "maxim,max1586", }, + {}, +}; +MODULE_DEVICE_TABLE(of, max1586_of_match); + static int max1586_pmic_probe(struct i2c_client *client, const struct i2c_device_id *i2c_id) { - struct max1586_platform_data *pdata = dev_get_platdata(&client->dev); + struct max1586_platform_data *pdata, pdata_of; struct regulator_config config = { }; struct max1586_data *max1586; - int i, id; + int i, id, ret; + const struct of_device_id *match; + + pdata = dev_get_platdata(&client->dev); + if (client->dev.of_node && !pdata) { + match = of_match_device(of_match_ptr(max1586_of_match), + &client->dev); + if (!match) { + dev_err(&client->dev, "Error: No device match found\n"); + return -ENODEV; + } + ret = of_get_max1586_platform_data(&client->dev, &pdata_of); + if (ret < 0) + return ret; + pdata = &pdata_of; + } max1586 = devm_kzalloc(&client->dev, sizeof(struct max1586_data), GFP_KERNEL); @@ -229,6 +305,7 @@ static struct i2c_driver max1586_pmic_driver = { .driver = { .name = "max1586", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(max1586_of_match), }, .id_table = max1586_id, }; diff --git a/include/linux/regulator/max1586.h b/include/linux/regulator/max1586.h index de9a7fa..cedd0fe 100644 --- a/include/linux/regulator/max1586.h +++ b/include/linux/regulator/max1586.h @@ -40,7 +40,7 @@ */ struct max1586_subdev_data { int id; - char *name; + const char *name; struct regulator_init_data *platform_data; }; -- cgit v0.10.2 From 4eea4b8e4491d3b2a96ec4b9b0f3a188da018cd1 Mon Sep 17 00:00:00 2001 From: Robert Jarzmik Date: Sun, 31 Aug 2014 21:10:52 +0200 Subject: regulator: max1586: add device-tree binding Add max1586 regulator device-tree bindings documentation. Signed-off-by: Robert Jarzmik Signed-off-by: Mark Brown diff --git a/Documentation/devicetree/bindings/regulator/max1586-regulator.txt b/Documentation/devicetree/bindings/regulator/max1586-regulator.txt new file mode 100644 index 0000000..c050c17 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/max1586-regulator.txt @@ -0,0 +1,28 @@ +Maxim MAX1586 voltage regulator + +Required properties: +- compatible: must be "maxim,max1586" +- reg: I2C slave address, usually 0x14 +- v3-gain: integer specifying the V3 gain as per datasheet + (1 + R24/R25 + R24/185.5kOhm) +- any required generic properties defined in regulator.txt + +Example: + + i2c_master { + max1586@14 { + compatible = "maxim,max1586"; + reg = <0x14>; + v3-gain = <1000000>; + + regulators { + vcc_core: v3 { + regulator-name = "vcc_core"; + regulator-compatible = "Output_V3"; + regulator-min-microvolt = <1000000>; + regulator-max-microvolt = <1705000>; + regulator-always-on; + }; + }; + }; + }; -- cgit v0.10.2 From 5ccedf03427ec71ab29a8bd77110242a605085a5 Mon Sep 17 00:00:00 2001 From: Fengguang Wu Date: Mon, 1 Sep 2014 12:55:58 +0100 Subject: regulator: max1586: of_get_max1586_platform_data() can be static Signed-off-by: Fengguang Wu Signed-off-by: Mark Brown diff --git a/drivers/regulator/max1586.c b/drivers/regulator/max1586.c index 5c04a71..86db310 100644 --- a/drivers/regulator/max1586.c +++ b/drivers/regulator/max1586.c @@ -159,7 +159,7 @@ static struct regulator_desc max1586_reg[] = { }, }; -int of_get_max1586_platform_data(struct device *dev, +static int of_get_max1586_platform_data(struct device *dev, struct max1586_platform_data *pdata) { struct max1586_subdev_data *sub; -- cgit v0.10.2 From da0bb557ba0b5985631a98b7450d256251e7fb5d Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 5 Sep 2014 09:17:41 +0800 Subject: regulator: max77802: Remove duplicate rdev_get_id() call Signed-off-by: Axel Lin Signed-off-by: Mark Brown diff --git a/drivers/regulator/max77802.c b/drivers/regulator/max77802.c index 967e109..d89792b 100644 --- a/drivers/regulator/max77802.c +++ b/drivers/regulator/max77802.c @@ -134,7 +134,7 @@ static int max77802_ldo_set_suspend_mode_logic1(struct regulator_dev *rdev, return -EINVAL; } - max77802->opmode[rdev_get_id(rdev)] = val; + max77802->opmode[id] = val; return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, rdev->desc->enable_mask, val << shift); } @@ -167,7 +167,7 @@ static int max77802_ldo_set_suspend_mode_logic2(struct regulator_dev *rdev, return -EINVAL; } - max77802->opmode[rdev_get_id(rdev)] = val; + max77802->opmode[id] = val; return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, rdev->desc->enable_mask, val << shift); } -- cgit v0.10.2 From ef126a4a8112998a9d4dcea166781331f1020f76 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Wed, 10 Sep 2014 15:17:01 +0100 Subject: regulator: of: Add stub OF match function for !OF case Signed-off-by: Mark Brown diff --git a/drivers/regulator/internal.h b/drivers/regulator/internal.h index a6043ad..80ba2a3 100644 --- a/drivers/regulator/internal.h +++ b/drivers/regulator/internal.h @@ -35,8 +35,18 @@ struct regulator { struct dentry *debugfs; }; +#ifdef CONFIG_OF struct regulator_init_data *regulator_of_get_init_data(struct device *dev, const struct regulator_desc *desc, struct device_node **node); +#else +static inline struct regulator_init_data * +regulator_of_get_init_data(struct device *dev, + const struct regulator_desc *desc, + struct device_node **node) +{ + return NULL; +} +#endif #endif -- cgit v0.10.2