| Message ID | 1421989367-32721-6-git-send-email-jaewon02.kim@samsung.com (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
2015-01-23 6:02 GMT+01:00 Jaewon Kim <jaewon02.kim@samsung.com>: > This patch adds new regulator driver to support max77843 > MFD(Multi Function Device) chip`s regulators. > The Max77843 has two voltage regulators for USB safeout. > > Cc: Mark Brown <broonie@kernel.org> > Signed-off-by: Beomho Seo <beomho.seo@samsung.com> > Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com> > --- > drivers/regulator/Kconfig | 8 ++ > drivers/regulator/Makefile | 1 + > drivers/regulator/max77843.c | 259 ++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 268 insertions(+) > create mode 100644 drivers/regulator/max77843.c > > diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig > index c3a60b5..c1f9c33 100644 > --- a/drivers/regulator/Kconfig > +++ b/drivers/regulator/Kconfig > @@ -414,6 +414,14 @@ config REGULATOR_MAX77802 > Exynos5420/Exynos5800 SoCs to control various voltages. > It includes support for control of voltage and ramp speed. > > +config REGULATOR_MAX77843 > + tristate "Maxim 77843 regulator" > + depends on MFD_MAX77843 > + help > + This driver controls a Maxim 77843 regulator. > + The regulator include two 'SAFEOUT' for USB(Universal Serial Bus) > + This is suitable for Exynos5433 SoC chips. > + > config REGULATOR_MC13XXX_CORE > tristate > > diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile > index 1f28ebf..12408d6 100644 > --- a/drivers/regulator/Makefile > +++ b/drivers/regulator/Makefile > @@ -55,6 +55,7 @@ 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-$(CONFIG_REGULATOR_MAX77843) += max77843.o > obj-$(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/max77843.c b/drivers/regulator/max77843.c > new file mode 100644 > index 0000000..86afc7a > --- /dev/null > +++ b/drivers/regulator/max77843.c > @@ -0,0 +1,259 @@ > +/* > + * max77843.c - Regulator driver for the Maxim MAX77843 > + * > + * Copyright (C) 2014 Samsung Electrnoics > + * Author: Jaewon Kim <jaewon02.kim@samsung.com> > + * > + * 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. > + */ > + > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/regulator/driver.h> > +#include <linux/regulator/machine.h> > +#include <linux/mfd/max77843-private.h> > +#include <linux/regulator/of_regulator.h> > + > +#define MAX77843_SUPPORTED_VOLTAGE_NUM 4 > + > +enum max77843_regulator_type { > + MAX77843_SAFEOUT1 = 0, > + MAX77843_SAFEOUT2, > + MAX77843_CHARGER, > + > + MAX77843_NUM, > +}; > + > +static const unsigned int max77843_regulator_table[] = { > + 4850000, > + 4900000, > + 4950000, > + 3300000, > +}; > + > +static int max77843_reg_is_enabled(struct regulator_dev *rdev) > +{ > + struct regmap *regmap = rdev->regmap; > + int ret; > + unsigned int reg; > + > + ret = regmap_read(regmap, rdev->desc->enable_reg, ®); > + if (ret) { > + dev_err(&rdev->dev, "Fialed to read charger register\n"); > + return ret; > + } > + > + return (reg & rdev->desc->enable_mask) == rdev->desc->enable_mask; > +} > + > +static int max77843_reg_get_current_limit(struct regulator_dev *rdev) > +{ > + struct regmap *regmap = rdev->regmap; > + unsigned int chg_min_uA = rdev->constraints->min_uA; > + unsigned int chg_max_uA = rdev->constraints->max_uA; > + unsigned int val; > + int ret; > + unsigned int reg, sel; > + > + ret = regmap_read(regmap, MAX77843_CHG_REG_CHG_CNFG_02, ®); > + if (ret) { > + dev_err(&rdev->dev, "Failed to read charger register\n"); > + return ret; > + } > + > + sel = reg & MAX77843_CHG_FAST_CHG_CURRENT_MASK; > + > + if (sel < 0x03) > + sel = 0; > + else > + sel -= 2; > + > + val = chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel; > + if (val > chg_max_uA) > + return -EINVAL; > + > + return val; > +} > + > +static int max77843_reg_set_current_limit(struct regulator_dev *rdev, > + int min_uA, int max_uA) > +{ > + struct regmap *regmap = rdev->regmap; > + unsigned int chg_min_uA = rdev->constraints->min_uA; > + int sel = 0; > + > + while (chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel < min_uA) > + sel++; > + > + if (chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel > max_uA) > + return -EINVAL; > + > + sel += 2; > + > + return regmap_write(regmap, MAX77843_CHG_REG_CHG_CNFG_02, sel); > +} > + > +static struct regulator_ops max77843_charger_ops = { > + .is_enabled = max77843_reg_is_enabled, > + .enable = regulator_enable_regmap, > + .disable = regulator_disable_regmap, > + .get_current_limit = max77843_reg_get_current_limit, > + .set_current_limit = max77843_reg_set_current_limit, > +}; > + > +static struct regulator_ops max77843_regulator_ops = { > + .is_enabled = regulator_is_enabled_regmap, > + .enable = regulator_enable_regmap, > + .disable = regulator_disable_regmap, > + .list_voltage = regulator_list_voltage_table, > + .get_voltage_sel = regulator_get_voltage_sel_regmap, > + .set_voltage_sel = regulator_set_voltage_sel_regmap, > +}; > + > +static const struct regulator_desc max77843_supported_regulators[] = { > + [MAX77843_SAFEOUT1] = { > + .name = "SAFEOUT1", > + .id = MAX77843_SAFEOUT1, > + .ops = &max77843_regulator_ops, > + .type = REGULATOR_VOLTAGE, > + .owner = THIS_MODULE, > + .n_voltages = MAX77843_SUPPORTED_VOLTAGE_NUM, > + .volt_table = max77843_regulator_table, > + .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, > + .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT1, > + .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, > + .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT1_MASK, > + }, > + [MAX77843_SAFEOUT2] = { > + .name = "SAFEOUT2", > + .id = MAX77843_SAFEOUT2, > + .ops = &max77843_regulator_ops, > + .type = REGULATOR_VOLTAGE, > + .owner = THIS_MODULE, > + .n_voltages = MAX77843_SUPPORTED_VOLTAGE_NUM, > + .volt_table = max77843_regulator_table, > + .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, > + .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT2, > + .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, > + .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT2_MASK, > + }, > + [MAX77843_CHARGER] = { > + .name = "CHARGER", > + .id = MAX77843_CHARGER, > + .ops = &max77843_charger_ops, > + .type = REGULATOR_CURRENT, > + .owner = THIS_MODULE, > + .enable_reg = MAX77843_CHG_REG_CHG_CNFG_00, > + .enable_mask = MAX77843_CHG_MASK, > + }, > +}; > + > +static struct of_regulator_match max77843_regulator_matches[] = { > + { .name = "SAFEOUT1", }, > + { .name = "SAFEOUT2", }, > + { .name = "CHARGER", }, > +}; > + > +static struct regmap *max77843_get_regmap(struct max77843 *max77843, int reg_id) > +{ > + switch (reg_id) { > + case MAX77843_SAFEOUT1: > + case MAX77843_SAFEOUT2: > + return max77843->regmap; > + case MAX77843_CHARGER: > + return max77843->regmap_chg; > + default: > + return max77843->regmap; > + } > +} > + > +static int max77843_regulator_dt_parse(struct platform_device *pdev) > +{ > + struct device_node *np; > + int ret; > + > + np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); > + if (!np) { > + dev_err(&pdev->dev, > + "Cannot get child OF node for regulators\n"); > + return -EINVAL; > + } > + > + ret = of_regulator_match(&pdev->dev, np, max77843_regulator_matches, > + ARRAY_SIZE(max77843_regulator_matches)); > + if (ret < 0) { > + dev_err(&pdev->dev, "Cannot parsing regulator init data\n"); > + return ret; > + } > + > + of_node_put(np); > + > + return 0; Use simplified DT parsing method (of_match and regulators_node from regulators_desc). This function could be removed then. Best regards, Krzysztof -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Krzysztof, 2015? 01? 23? 16:18? Krzysztof Koz?owski ?(?) ? ?: > 2015-01-23 6:02 GMT+01:00 Jaewon Kim <jaewon02.kim@samsung.com>: >> This patch adds new regulator driver to support max77843 >> MFD(Multi Function Device) chip`s regulators. >> The Max77843 has two voltage regulators for USB safeout. >> >> Cc: Mark Brown <broonie@kernel.org> >> Signed-off-by: Beomho Seo <beomho.seo@samsung.com> >> Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com> >> --- >> drivers/regulator/Kconfig | 8 ++ >> drivers/regulator/Makefile | 1 + >> drivers/regulator/max77843.c | 259 ++++++++++++++++++++++++++++++++++++++++++ >> 3 files changed, 268 insertions(+) >> create mode 100644 drivers/regulator/max77843.c >> >> diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig >> index c3a60b5..c1f9c33 100644 >> --- a/drivers/regulator/Kconfig >> +++ b/drivers/regulator/Kconfig >> @@ -414,6 +414,14 @@ config REGULATOR_MAX77802 >> Exynos5420/Exynos5800 SoCs to control various voltages. >> It includes support for control of voltage and ramp speed. >> >> +config REGULATOR_MAX77843 >> + tristate "Maxim 77843 regulator" >> + depends on MFD_MAX77843 >> + help >> + This driver controls a Maxim 77843 regulator. >> + The regulator include two 'SAFEOUT' for USB(Universal Serial Bus) >> + This is suitable for Exynos5433 SoC chips. >> + >> config REGULATOR_MC13XXX_CORE >> tristate >> >> diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile >> index 1f28ebf..12408d6 100644 >> --- a/drivers/regulator/Makefile >> +++ b/drivers/regulator/Makefile >> @@ -55,6 +55,7 @@ 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-$(CONFIG_REGULATOR_MAX77843) += max77843.o >> obj-$(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/max77843.c b/drivers/regulator/max77843.c >> new file mode 100644 >> index 0000000..86afc7a >> --- /dev/null >> +++ b/drivers/regulator/max77843.c >> @@ -0,0 +1,259 @@ >> +/* >> + * max77843.c - Regulator driver for the Maxim MAX77843 >> + * >> + * Copyright (C) 2014 Samsung Electrnoics >> + * Author: Jaewon Kim <jaewon02.kim@samsung.com> >> + * >> + * 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. >> + */ >> + >> +#include <linux/module.h> >> +#include <linux/platform_device.h> >> +#include <linux/regulator/driver.h> >> +#include <linux/regulator/machine.h> >> +#include <linux/mfd/max77843-private.h> >> +#include <linux/regulator/of_regulator.h> >> + >> +#define MAX77843_SUPPORTED_VOLTAGE_NUM 4 >> + >> +enum max77843_regulator_type { >> + MAX77843_SAFEOUT1 = 0, >> + MAX77843_SAFEOUT2, >> + MAX77843_CHARGER, >> + >> + MAX77843_NUM, >> +}; >> + >> +static const unsigned int max77843_regulator_table[] = { >> + 4850000, >> + 4900000, >> + 4950000, >> + 3300000, >> +}; >> + >> +static int max77843_reg_is_enabled(struct regulator_dev *rdev) >> +{ >> + struct regmap *regmap = rdev->regmap; >> + int ret; >> + unsigned int reg; >> + >> + ret = regmap_read(regmap, rdev->desc->enable_reg, ®); >> + if (ret) { >> + dev_err(&rdev->dev, "Fialed to read charger register\n"); >> + return ret; >> + } >> + >> + return (reg & rdev->desc->enable_mask) == rdev->desc->enable_mask; >> +} >> + >> +static int max77843_reg_get_current_limit(struct regulator_dev *rdev) >> +{ >> + struct regmap *regmap = rdev->regmap; >> + unsigned int chg_min_uA = rdev->constraints->min_uA; >> + unsigned int chg_max_uA = rdev->constraints->max_uA; >> + unsigned int val; >> + int ret; >> + unsigned int reg, sel; >> + >> + ret = regmap_read(regmap, MAX77843_CHG_REG_CHG_CNFG_02, ®); >> + if (ret) { >> + dev_err(&rdev->dev, "Failed to read charger register\n"); >> + return ret; >> + } >> + >> + sel = reg & MAX77843_CHG_FAST_CHG_CURRENT_MASK; >> + >> + if (sel < 0x03) >> + sel = 0; >> + else >> + sel -= 2; >> + >> + val = chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel; >> + if (val > chg_max_uA) >> + return -EINVAL; >> + >> + return val; >> +} >> + >> +static int max77843_reg_set_current_limit(struct regulator_dev *rdev, >> + int min_uA, int max_uA) >> +{ >> + struct regmap *regmap = rdev->regmap; >> + unsigned int chg_min_uA = rdev->constraints->min_uA; >> + int sel = 0; >> + >> + while (chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel < min_uA) >> + sel++; >> + >> + if (chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel > max_uA) >> + return -EINVAL; >> + >> + sel += 2; >> + >> + return regmap_write(regmap, MAX77843_CHG_REG_CHG_CNFG_02, sel); >> +} >> + >> +static struct regulator_ops max77843_charger_ops = { >> + .is_enabled = max77843_reg_is_enabled, >> + .enable = regulator_enable_regmap, >> + .disable = regulator_disable_regmap, >> + .get_current_limit = max77843_reg_get_current_limit, >> + .set_current_limit = max77843_reg_set_current_limit, >> +}; >> + >> +static struct regulator_ops max77843_regulator_ops = { >> + .is_enabled = regulator_is_enabled_regmap, >> + .enable = regulator_enable_regmap, >> + .disable = regulator_disable_regmap, >> + .list_voltage = regulator_list_voltage_table, >> + .get_voltage_sel = regulator_get_voltage_sel_regmap, >> + .set_voltage_sel = regulator_set_voltage_sel_regmap, >> +}; >> + >> +static const struct regulator_desc max77843_supported_regulators[] = { >> + [MAX77843_SAFEOUT1] = { >> + .name = "SAFEOUT1", >> + .id = MAX77843_SAFEOUT1, >> + .ops = &max77843_regulator_ops, >> + .type = REGULATOR_VOLTAGE, >> + .owner = THIS_MODULE, >> + .n_voltages = MAX77843_SUPPORTED_VOLTAGE_NUM, >> + .volt_table = max77843_regulator_table, >> + .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, >> + .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT1, >> + .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, >> + .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT1_MASK, >> + }, >> + [MAX77843_SAFEOUT2] = { >> + .name = "SAFEOUT2", >> + .id = MAX77843_SAFEOUT2, >> + .ops = &max77843_regulator_ops, >> + .type = REGULATOR_VOLTAGE, >> + .owner = THIS_MODULE, >> + .n_voltages = MAX77843_SUPPORTED_VOLTAGE_NUM, >> + .volt_table = max77843_regulator_table, >> + .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, >> + .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT2, >> + .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, >> + .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT2_MASK, >> + }, >> + [MAX77843_CHARGER] = { >> + .name = "CHARGER", >> + .id = MAX77843_CHARGER, >> + .ops = &max77843_charger_ops, >> + .type = REGULATOR_CURRENT, >> + .owner = THIS_MODULE, >> + .enable_reg = MAX77843_CHG_REG_CHG_CNFG_00, >> + .enable_mask = MAX77843_CHG_MASK, >> + }, >> +}; >> + >> +static struct of_regulator_match max77843_regulator_matches[] = { >> + { .name = "SAFEOUT1", }, >> + { .name = "SAFEOUT2", }, >> + { .name = "CHARGER", }, >> +}; >> + >> +static struct regmap *max77843_get_regmap(struct max77843 *max77843, int reg_id) >> +{ >> + switch (reg_id) { >> + case MAX77843_SAFEOUT1: >> + case MAX77843_SAFEOUT2: >> + return max77843->regmap; >> + case MAX77843_CHARGER: >> + return max77843->regmap_chg; >> + default: >> + return max77843->regmap; >> + } >> +} >> + >> +static int max77843_regulator_dt_parse(struct platform_device *pdev) >> +{ >> + struct device_node *np; >> + int ret; >> + >> + np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); >> + if (!np) { >> + dev_err(&pdev->dev, >> + "Cannot get child OF node for regulators\n"); >> + return -EINVAL; >> + } >> + >> + ret = of_regulator_match(&pdev->dev, np, max77843_regulator_matches, >> + ARRAY_SIZE(max77843_regulator_matches)); >> + if (ret < 0) { >> + dev_err(&pdev->dev, "Cannot parsing regulator init data\n"); >> + return ret; >> + } >> + >> + of_node_put(np); >> + >> + return 0; > Use simplified DT parsing method (of_match and regulators_node from > regulators_desc). This function could be removed then. Thanks to advice. I will use more simplified method in next version. > > Best regards, > Krzysztof > -- > To unsubscribe from this list: send the line "unsubscribe linux-pm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Thanks, Jaewon Kim -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index c3a60b5..c1f9c33 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -414,6 +414,14 @@ config REGULATOR_MAX77802 Exynos5420/Exynos5800 SoCs to control various voltages. It includes support for control of voltage and ramp speed. +config REGULATOR_MAX77843 + tristate "Maxim 77843 regulator" + depends on MFD_MAX77843 + help + This driver controls a Maxim 77843 regulator. + The regulator include two 'SAFEOUT' for USB(Universal Serial Bus) + This is suitable for Exynos5433 SoC chips. + config REGULATOR_MC13XXX_CORE tristate diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 1f28ebf..12408d6 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -55,6 +55,7 @@ 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-$(CONFIG_REGULATOR_MAX77843) += max77843.o obj-$(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/max77843.c b/drivers/regulator/max77843.c new file mode 100644 index 0000000..86afc7a --- /dev/null +++ b/drivers/regulator/max77843.c @@ -0,0 +1,259 @@ +/* + * max77843.c - Regulator driver for the Maxim MAX77843 + * + * Copyright (C) 2014 Samsung Electrnoics + * Author: Jaewon Kim <jaewon02.kim@samsung.com> + * + * 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. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/mfd/max77843-private.h> +#include <linux/regulator/of_regulator.h> + +#define MAX77843_SUPPORTED_VOLTAGE_NUM 4 + +enum max77843_regulator_type { + MAX77843_SAFEOUT1 = 0, + MAX77843_SAFEOUT2, + MAX77843_CHARGER, + + MAX77843_NUM, +}; + +static const unsigned int max77843_regulator_table[] = { + 4850000, + 4900000, + 4950000, + 3300000, +}; + +static int max77843_reg_is_enabled(struct regulator_dev *rdev) +{ + struct regmap *regmap = rdev->regmap; + int ret; + unsigned int reg; + + ret = regmap_read(regmap, rdev->desc->enable_reg, ®); + if (ret) { + dev_err(&rdev->dev, "Fialed to read charger register\n"); + return ret; + } + + return (reg & rdev->desc->enable_mask) == rdev->desc->enable_mask; +} + +static int max77843_reg_get_current_limit(struct regulator_dev *rdev) +{ + struct regmap *regmap = rdev->regmap; + unsigned int chg_min_uA = rdev->constraints->min_uA; + unsigned int chg_max_uA = rdev->constraints->max_uA; + unsigned int val; + int ret; + unsigned int reg, sel; + + ret = regmap_read(regmap, MAX77843_CHG_REG_CHG_CNFG_02, ®); + if (ret) { + dev_err(&rdev->dev, "Failed to read charger register\n"); + return ret; + } + + sel = reg & MAX77843_CHG_FAST_CHG_CURRENT_MASK; + + if (sel < 0x03) + sel = 0; + else + sel -= 2; + + val = chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel; + if (val > chg_max_uA) + return -EINVAL; + + return val; +} + +static int max77843_reg_set_current_limit(struct regulator_dev *rdev, + int min_uA, int max_uA) +{ + struct regmap *regmap = rdev->regmap; + unsigned int chg_min_uA = rdev->constraints->min_uA; + int sel = 0; + + while (chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel < min_uA) + sel++; + + if (chg_min_uA + MAX77843_CHG_FAST_CHG_CURRENT_STEP * sel > max_uA) + return -EINVAL; + + sel += 2; + + return regmap_write(regmap, MAX77843_CHG_REG_CHG_CNFG_02, sel); +} + +static struct regulator_ops max77843_charger_ops = { + .is_enabled = max77843_reg_is_enabled, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .get_current_limit = max77843_reg_get_current_limit, + .set_current_limit = max77843_reg_set_current_limit, +}; + +static struct regulator_ops max77843_regulator_ops = { + .is_enabled = regulator_is_enabled_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .list_voltage = regulator_list_voltage_table, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, +}; + +static const struct regulator_desc max77843_supported_regulators[] = { + [MAX77843_SAFEOUT1] = { + .name = "SAFEOUT1", + .id = MAX77843_SAFEOUT1, + .ops = &max77843_regulator_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .n_voltages = MAX77843_SUPPORTED_VOLTAGE_NUM, + .volt_table = max77843_regulator_table, + .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, + .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT1, + .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, + .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT1_MASK, + }, + [MAX77843_SAFEOUT2] = { + .name = "SAFEOUT2", + .id = MAX77843_SAFEOUT2, + .ops = &max77843_regulator_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, + .n_voltages = MAX77843_SUPPORTED_VOLTAGE_NUM, + .volt_table = max77843_regulator_table, + .enable_reg = MAX77843_SYS_REG_SAFEOUTCTRL, + .enable_mask = MAX77843_REG_SAFEOUTCTRL_ENSAFEOUT2, + .vsel_reg = MAX77843_SYS_REG_SAFEOUTCTRL, + .vsel_mask = MAX77843_REG_SAFEOUTCTRL_SAFEOUT2_MASK, + }, + [MAX77843_CHARGER] = { + .name = "CHARGER", + .id = MAX77843_CHARGER, + .ops = &max77843_charger_ops, + .type = REGULATOR_CURRENT, + .owner = THIS_MODULE, + .enable_reg = MAX77843_CHG_REG_CHG_CNFG_00, + .enable_mask = MAX77843_CHG_MASK, + }, +}; + +static struct of_regulator_match max77843_regulator_matches[] = { + { .name = "SAFEOUT1", }, + { .name = "SAFEOUT2", }, + { .name = "CHARGER", }, +}; + +static struct regmap *max77843_get_regmap(struct max77843 *max77843, int reg_id) +{ + switch (reg_id) { + case MAX77843_SAFEOUT1: + case MAX77843_SAFEOUT2: + return max77843->regmap; + case MAX77843_CHARGER: + return max77843->regmap_chg; + default: + return max77843->regmap; + } +} + +static int max77843_regulator_dt_parse(struct platform_device *pdev) +{ + struct device_node *np; + int ret; + + np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); + if (!np) { + dev_err(&pdev->dev, + "Cannot get child OF node for regulators\n"); + return -EINVAL; + } + + ret = of_regulator_match(&pdev->dev, np, max77843_regulator_matches, + ARRAY_SIZE(max77843_regulator_matches)); + if (ret < 0) { + dev_err(&pdev->dev, "Cannot parsing regulator init data\n"); + return ret; + } + + of_node_put(np); + + return 0; +} + +static int max77843_regulator_probe(struct platform_device *pdev) +{ + struct max77843 *max77843 = dev_get_drvdata(pdev->dev.parent); + struct regulator_config config = {}; + int i, ret; + + ret = max77843_regulator_dt_parse(pdev); + if (ret) { + dev_err(&pdev->dev, "Failed to parse device tree\n"); + return ret; + } + + config.dev = &pdev->dev; + config.driver_data = max77843; + + for (i = 0; i < ARRAY_SIZE(max77843_supported_regulators); i++) { + struct regulator_dev *regulator; + + config.init_data = max77843_regulator_matches[i].init_data; + config.of_node = max77843_regulator_matches[i].of_node; + config.regmap = max77843_get_regmap(max77843, + max77843_supported_regulators[i].id); + + regulator = devm_regulator_register(&pdev->dev, + &max77843_supported_regulators[i], &config); + if (IS_ERR(regulator)) { + dev_err(&pdev->dev, + "Failed to regiser regulator-%d\n", i); + return PTR_ERR(regulator); + } + } + + return 0; +} + +static const struct platform_device_id max77843_regulator_id[] = { + { "max77843-regulator", }, + { /* sentinel */ }, +}; + +static struct platform_driver max77843_regulator_driver = { + .driver = { + .name = "max77843-regulator", + }, + .probe = max77843_regulator_probe, + .id_table = max77843_regulator_id, +}; + +static int __init max77843_regulator_init(void) +{ + return platform_driver_register(&max77843_regulator_driver); +} +subsys_initcall(max77843_regulator_init); + +static void __exit max77843_regulator_exit(void) +{ + platform_driver_unregister(&max77843_regulator_driver); +} +module_exit(max77843_regulator_exit); + +MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); +MODULE_DESCRIPTION("Maxim MAX77843 regulator driver"); +MODULE_LICENSE("GPL");