power: regulator: max77663: add regulator support

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>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>

diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index eb5aa38c1cce1b543eafde4681fd62dfd95cf1b3..581816294c7cbfd979ce3b7f3c3e1744c83c97c9 100644 (file)
--- 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 d9e0cd5949ce13dd0649cf7916d1803f5c416499..8d73169b5010343c9f87e334ac7051c1d1300ee4 100644 (file)
--- 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 (file)
index 0000000..ea4b7c6
--- /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,
+};