The driver provides regulator set/get voltage
enable/disable functions for MAXIM MAX77663 PMICs.
Signed-off-by: Svyatoslav Ryhel <clamo...@gmail.com>
Reviewed-by: Simon Glass <s...@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 <clamo...@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,
+};
--
2.39.2
