The driver provides regulator set/get voltage enable/disable functions for MAXIM MAX77663 PMICs.
Signed-off-by: Svyatoslav Ryhel clamor95@gmail.com Reviewed-by: Simon Glass sjg@chromium.org --- drivers/power/regulator/Kconfig | 9 + drivers/power/regulator/Makefile | 1 + drivers/power/regulator/max77663_regulator.c | 375 +++++++++++++++++++ 3 files changed, 385 insertions(+) create mode 100644 drivers/power/regulator/max77663_regulator.c
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig index eb5aa38c1c..581816294c 100644 --- a/drivers/power/regulator/Kconfig +++ b/drivers/power/regulator/Kconfig @@ -141,6 +141,15 @@ config SPL_REGULATOR_PWM This config enables implementation of driver-model regulator uclass features for PWM regulators in SPL.
+config DM_REGULATOR_MAX77663 + bool "Enable Driver Model for REGULATOR MAX77663" + depends on DM_REGULATOR && DM_PMIC_MAX77663 + ---help--- + This config enables implementation of driver-model regulator uclass + features for REGULATOR MAX77663. The driver supports both DC-to-DC + Step-Down (SD) Regulators and Low-Dropout Linear (LDO) Regulators + found in MAX77663 PMIC and implements get/set api for value and enable. + config DM_REGULATOR_MAX77686 bool "Enable Driver Model for REGULATOR MAX77686" depends on DM_REGULATOR && DM_PMIC_MAX77686 diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile index d9e0cd5949..8d73169b50 100644 --- a/drivers/power/regulator/Makefile +++ b/drivers/power/regulator/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_REGULATOR_AS3722) += as3722_regulator.o obj-$(CONFIG_$(SPL_)REGULATOR_AXP) += axp_regulator.o obj-$(CONFIG_$(SPL_)REGULATOR_AXP_USB_POWER) += axp_usb_power.o obj-$(CONFIG_$(SPL_)DM_REGULATOR_DA9063) += da9063.o +obj-$(CONFIG_$(SPL_)DM_REGULATOR_MAX77663) += max77663_regulator.o obj-$(CONFIG_DM_REGULATOR_MAX77686) += max77686.o obj-$(CONFIG_DM_REGULATOR_NPCM8XX) += npcm8xx_regulator.o obj-$(CONFIG_$(SPL_)DM_PMIC_PFUZE100) += pfuze100.o diff --git a/drivers/power/regulator/max77663_regulator.c b/drivers/power/regulator/max77663_regulator.c new file mode 100644 index 0000000000..ea4b7c63e5 --- /dev/null +++ b/drivers/power/regulator/max77663_regulator.c @@ -0,0 +1,375 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright(C) 2023 Svyatoslav Ryhel clamor95@gmail.com + */ + +#include <dm.h> +#include <power/pmic.h> +#include <power/regulator.h> +#include <power/max77663.h> + +/* fist row is control registers, second is voltage registers */ +static const char max77663_sd_reg[][MAX77663_SD_NUM] = { + { 0x1d, 0x1e, 0x1f, 0x20, 0x21 }, + { 0x16, 0x17, 0x18, 0x19, 0x2a }, +}; + +static const char max77663_ldo_reg[MAX77663_LDO_NUM] = { + 0x23, 0x25, 0x27, 0x29, 0x2b, 0x2d, 0x2f, 0x31, 0x33 +}; + +static int max77663_sd_enable(struct udevice *dev, int op, bool *enable) +{ + struct dm_regulator_uclass_plat *uc_pdata = + dev_get_uclass_plat(dev); + u32 adr = uc_pdata->ctrl_reg; + int val, ret; + + val = pmic_reg_read(dev->parent, adr); + if (val < 0) + return val; + + if (op == PMIC_OP_GET) { + if (val & SD_STATUS_MASK) + *enable = true; + else + *enable = false; + + return 0; + } else if (op == PMIC_OP_SET) { + val &= ~SD_STATUS_MASK; + + if (*enable) + val |= SD_STATUS_MASK; + + ret = pmic_reg_write(dev->parent, adr, val); + if (ret) + return ret; + } + + return 0; +} + +/** + * max77663_*_volt2hex() - convert voltage in uV into + * applicable to register hex value + * + * @idx: regulator index + * @uV: voltage in uV + * + * Return: voltage in hex on success, -ve on failure + */ +static int max77663_sd_volt2hex(int idx, int uV) +{ + switch (idx) { + case 0: + /* SD0 has max voltage 1.4V */ + if (uV > SD0_VOLT_MAX) + return -EINVAL; + break; + case 1: + /* SD1 has max voltage 1.55V */ + if (uV > SD1_VOLT_MAX) + return -EINVAL; + break; + default: + /* SD2 and SD3 have max voltage 3.79V */ + if (uV > SD_VOLT_MAX) + return -EINVAL; + break; + }; + + if (uV < SD_VOLT_MIN) + uV = SD_VOLT_MIN; + + return (uV - SD_VOLT_BASE) / 12500; +} + +/** + * max77663_*_hex2volt() - convert register hex value into + * actual voltage in uV + * + * @idx: regulator index + * @hex: hex value of register + * + * Return: voltage in uV on success, -ve on failure + */ +static int max77663_sd_hex2volt(int idx, int hex) +{ + switch (idx) { + case 0: + /* SD0 has max voltage 1.4V */ + if (hex > SD0_VOLT_MAX_HEX) + return -EINVAL; + break; + case 1: + /* SD1 has max voltage 1.55V */ + if (hex > SD1_VOLT_MAX_HEX) + return -EINVAL; + break; + default: + /* SD2 and SD3 have max voltage 3.79V */ + if (hex > SD_VOLT_MAX_HEX) + return -EINVAL; + break; + }; + + if (hex < SD_VOLT_MIN_HEX) + hex = SD_VOLT_MIN_HEX; + + return SD_VOLT_BASE + hex * 12500; +} + +static int max77663_sd_val(struct udevice *dev, int op, int *uV) +{ + struct dm_regulator_uclass_plat *uc_pdata = + dev_get_uclass_plat(dev); + u32 adr = uc_pdata->volt_reg; + int idx = dev->driver_data; + int hex, ret; + + if (op == PMIC_OP_GET) { + hex = pmic_reg_read(dev->parent, adr); + if (hex < 0) + return hex; + + *uV = 0; + + ret = max77663_sd_hex2volt(idx, hex); + if (ret < 0) + return ret; + *uV = ret; + + return 0; + } + + /* SD regulators use entire register for voltage */ + hex = max77663_sd_volt2hex(idx, *uV); + if (hex < 0) + return hex; + + return pmic_reg_write(dev->parent, adr, hex); +} + +static int max77663_sd_probe(struct udevice *dev) +{ + struct dm_regulator_uclass_plat *uc_pdata = + dev_get_uclass_plat(dev); + int idx = dev->driver_data; + + uc_pdata->type = REGULATOR_TYPE_BUCK; + uc_pdata->ctrl_reg = max77663_sd_reg[0][idx]; + uc_pdata->volt_reg = max77663_sd_reg[1][idx]; + + return 0; +} + +static int sd_get_value(struct udevice *dev) +{ + int uV; + int ret; + + ret = max77663_sd_val(dev, PMIC_OP_GET, &uV); + if (ret) + return ret; + + return uV; +} + +static int sd_set_value(struct udevice *dev, int uV) +{ + return max77663_sd_val(dev, PMIC_OP_SET, &uV); +} + +static int sd_get_enable(struct udevice *dev) +{ + bool enable = false; + int ret; + + ret = max77663_sd_enable(dev, PMIC_OP_GET, &enable); + if (ret) + return ret; + + return enable; +} + +static int sd_set_enable(struct udevice *dev, bool enable) +{ + return max77663_sd_enable(dev, PMIC_OP_SET, &enable); +} + +static const struct dm_regulator_ops max77663_sd_ops = { + .get_value = sd_get_value, + .set_value = sd_set_value, + .get_enable = sd_get_enable, + .set_enable = sd_set_enable, +}; + +U_BOOT_DRIVER(max77663_sd) = { + .name = MAX77663_SD_DRIVER, + .id = UCLASS_REGULATOR, + .ops = &max77663_sd_ops, + .probe = max77663_sd_probe, +}; + +static int max77663_ldo_enable(struct udevice *dev, int op, bool *enable) +{ + struct dm_regulator_uclass_plat *uc_pdata = + dev_get_uclass_plat(dev); + u32 adr = uc_pdata->ctrl_reg; + int val, ret; + + val = pmic_reg_read(dev->parent, adr); + if (val < 0) + return val; + + if (op == PMIC_OP_GET) { + if (val & LDO_STATUS_MASK) + *enable = true; + else + *enable = false; + + return 0; + } else if (op == PMIC_OP_SET) { + val &= ~LDO_STATUS_MASK; + + if (*enable) + val |= LDO_STATUS_MASK; + + ret = pmic_reg_write(dev->parent, adr, val); + if (ret) + return ret; + } + + return 0; +} + +static int max77663_ldo_volt2hex(int idx, int uV) +{ + switch (idx) { + case 0: + case 1: + if (uV > LDO01_VOLT_MAX) + return -EINVAL; + + return (uV - LDO_VOLT_BASE) / 25000; + case 4: + if (uV > LDO4_VOLT_MAX) + return -EINVAL; + + return (uV - LDO_VOLT_BASE) / 12500; + default: + if (uV > LDO_VOLT_MAX) + return -EINVAL; + + return (uV - LDO_VOLT_BASE) / 50000; + }; +} + +static int max77663_ldo_hex2volt(int idx, int hex) +{ + if (hex > LDO_VOLT_MAX_HEX) + return -EINVAL; + + switch (idx) { + case 0: + case 1: + return (hex * 25000) + LDO_VOLT_BASE; + case 4: + return (hex * 12500) + LDO_VOLT_BASE; + default: + return (hex * 50000) + LDO_VOLT_BASE; + }; +} + +static int max77663_ldo_val(struct udevice *dev, int op, int *uV) +{ + struct dm_regulator_uclass_plat *uc_pdata = + dev_get_uclass_plat(dev); + u32 adr = uc_pdata->ctrl_reg; + int idx = dev->driver_data; + int hex, val, ret; + + val = pmic_reg_read(dev->parent, adr); + if (val < 0) + return val; + + if (op == PMIC_OP_GET) { + *uV = 0; + + ret = max77663_ldo_hex2volt(idx, val & LDO_VOLT_MASK); + if (ret < 0) + return ret; + + *uV = ret; + return 0; + } + + hex = max77663_ldo_volt2hex(idx, *uV); + if (hex < 0) + return hex; + + val &= ~LDO_VOLT_MASK; + + return pmic_reg_write(dev->parent, adr, val | hex); +} + +static int max77663_ldo_probe(struct udevice *dev) +{ + struct dm_regulator_uclass_plat *uc_pdata = + dev_get_uclass_plat(dev); + int idx = dev->driver_data; + + uc_pdata->type = REGULATOR_TYPE_LDO; + uc_pdata->ctrl_reg = max77663_ldo_reg[idx]; + + return 0; +} + +static int ldo_get_value(struct udevice *dev) +{ + int uV; + int ret; + + ret = max77663_ldo_val(dev, PMIC_OP_GET, &uV); + if (ret) + return ret; + + return uV; +} + +static int ldo_set_value(struct udevice *dev, int uV) +{ + return max77663_ldo_val(dev, PMIC_OP_SET, &uV); +} + +static int ldo_get_enable(struct udevice *dev) +{ + bool enable = false; + int ret; + + ret = max77663_ldo_enable(dev, PMIC_OP_GET, &enable); + if (ret) + return ret; + + return enable; +} + +static int ldo_set_enable(struct udevice *dev, bool enable) +{ + return max77663_ldo_enable(dev, PMIC_OP_SET, &enable); +} + +static const struct dm_regulator_ops max77663_ldo_ops = { + .get_value = ldo_get_value, + .set_value = ldo_set_value, + .get_enable = ldo_get_enable, + .set_enable = ldo_set_enable, +}; + +U_BOOT_DRIVER(max77663_ldo) = { + .name = MAX77663_LDO_DRIVER, + .id = UCLASS_REGULATOR, + .ops = &max77663_ldo_ops, + .probe = max77663_ldo_probe, +};