[PATCH v9 6/8] power: regulator: tps80031: add regulator support

[Svyatoslav Ryhel <clamor95@gmail.com>]

The driver provides regulator set/get voltage enable/disable
functions for TI TPS80031/TPS80032 PMICs.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
 drivers/power/regulator/Kconfig              |   8 +
 drivers/power/regulator/Makefile             |   1 +
 drivers/power/regulator/tps80031_regulator.c | 347 +++++++++++++++++++
 3 files changed, 356 insertions(+)
 create mode 100644 drivers/power/regulator/tps80031_regulator.c

diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 581816294c..6454c54855 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -356,6 +356,14 @@ config DM_REGULATOR_TPS62360
 	implements the get/set api for value only, as the power line is
 	always on.
 
+config DM_REGULATOR_TPS80031
+	bool "Enable driver for TPS80031/TPS80032 PMIC regulators"
+	depends on DM_PMIC_TPS80031
+	---help---
+	This enables implementation of driver-model regulator uclass
+	features for TPS80031/TPS80032 PMICs. The driver implements
+	get/set api for: value and enable.
+
 config DM_REGULATOR_STPMIC1
 	bool "Enable driver for STPMIC1 regulators"
 	depends on DM_REGULATOR && PMIC_STPMIC1
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index 8d73169b50..3ef55dc534 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -33,6 +33,7 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR_LP87565) += lp87565_regulator.o
 obj-$(CONFIG_$(SPL_)DM_REGULATOR_STM32_VREFBUF) += stm32-vrefbuf.o
 obj-$(CONFIG_DM_REGULATOR_TPS65910) += tps65910_regulator.o
 obj-$(CONFIG_DM_REGULATOR_TPS62360) += tps62360_regulator.o
+obj-$(CONFIG_$(SPL_)DM_REGULATOR_TPS80031) += tps80031_regulator.o
 obj-$(CONFIG_$(SPL_)DM_REGULATOR_STPMIC1) += stpmic1.o
 obj-$(CONFIG_DM_REGULATOR_TPS65941) += tps65941_regulator.o
 obj-$(CONFIG_DM_REGULATOR_SCMI) += scmi_regulator.o
diff --git a/drivers/power/regulator/tps80031_regulator.c b/drivers/power/regulator/tps80031_regulator.c
new file mode 100644
index 0000000000..87696662e1
--- /dev/null
+++ b/drivers/power/regulator/tps80031_regulator.c
@@ -0,0 +1,347 @@
+// 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/tps80031.h>
+
+static const char tps80031_smps_reg[][TPS80031_SMPS_NUM] = {
+	{   0x54,   0x5a,   0x66,   0x42,   0x48 },
+	{   0x56,   0x5c,   0x68,   0x44,   0x4a },
+	{ BIT(3), BIT(4), BIT(6), BIT(0), BIT(1) },
+};
+
+static const char tps80031_ldo_reg[][TPS80031_LDO_NUM] = {
+	{ 0x9e, 0x86, 0x8e, 0x8a, 0x9a, 0x92, 0xa6, 0x96, 0xa2 },
+	{ 0x9f, 0x87, 0x8f, 0x8b, 0x9b, 0x93, 0xa7, 0x97, 0xa3 },
+};
+
+static int tps80031_regulator_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 & REGULATOR_MODE_ON)
+			*enable = true;
+		else
+			*enable = false;
+
+		return 0;
+	} else if (op == PMIC_OP_SET) {
+		val &= ~REGULATOR_STATUS_MASK;
+
+		if (*enable)
+			val |= REGULATOR_MODE_ON;
+
+		ret = pmic_reg_write(dev->parent, adr, val);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int tps80031_get_enable(struct udevice *dev)
+{
+	bool enable = false;
+	int ret;
+
+	ret = tps80031_regulator_enable(dev, PMIC_OP_GET, &enable);
+	if (ret)
+		return ret;
+
+	return enable;
+}
+
+static int tps80031_set_enable(struct udevice *dev, bool enable)
+{
+	return tps80031_regulator_enable(dev, PMIC_OP_SET, &enable);
+}
+
+/**
+ * tps80031_ldo_volt2hex() - convert voltage in uV into
+ *			     applicable to register hex value
+ *
+ * @uV:		voltage in uV
+ *
+ * Return: voltage in hex on success, -ve on failure
+ */
+static int tps80031_ldo_volt2hex(int uV)
+{
+	if (uV > LDO_VOLT_MAX)
+		return -EINVAL;
+
+	if (uV < LDO_VOLT_MIN)
+		uV = LDO_VOLT_MIN;
+
+	return DIV_ROUND_UP(uV - LDO_VOLT_BASE, 102000);
+}
+
+/**
+ * tps80031_ldo_hex2volt() - convert register hex value into
+ *			     actual voltage in uV
+ *
+ * @hex:	hex value of register
+ *
+ * Return: voltage in uV on success, -ve on failure
+ */
+static int tps80031_ldo_hex2volt(int hex)
+{
+	if (hex > LDO_VOLT_MAX_HEX)
+		return -EINVAL;
+
+	if (hex < LDO_VOLT_MIN_HEX)
+		hex = LDO_VOLT_MIN_HEX;
+
+	return LDO_VOLT_BASE + hex * 102000;
+}
+
+static int tps80031_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->volt_reg;
+	int val, hex, ret;
+
+	val = pmic_reg_read(dev->parent, adr);
+	if (val < 0)
+		return val;
+
+	if (op == PMIC_OP_GET) {
+		*uV = 0;
+
+		ret = tps80031_ldo_hex2volt(val & LDO_VOLT_MASK);
+		if (ret < 0)
+			return ret;
+
+		*uV = ret;
+		return 0;
+	}
+
+	hex = tps80031_ldo_volt2hex(*uV);
+	if (hex < 0)
+		return hex;
+
+	val &= ~LDO_VOLT_MASK;
+
+	return pmic_reg_write(dev->parent, adr, val | hex);
+}
+
+static int tps80031_ldo_probe(struct udevice *dev)
+{
+	struct dm_regulator_uclass_plat *uc_pdata =
+					dev_get_uclass_plat(dev);
+
+	uc_pdata->type = REGULATOR_TYPE_LDO;
+
+	/* check for ldoln and ldousb cases */
+	if (!strcmp("ldoln", dev->name)) {
+		uc_pdata->ctrl_reg = tps80031_ldo_reg[CTRL][7];
+		uc_pdata->volt_reg = tps80031_ldo_reg[VOLT][7];
+		return 0;
+	}
+
+	if (!strcmp("ldousb", dev->name)) {
+		uc_pdata->ctrl_reg = tps80031_ldo_reg[CTRL][8];
+		uc_pdata->volt_reg = tps80031_ldo_reg[VOLT][8];
+		return 0;
+	}
+
+	if (dev->driver_data > 0) {
+		u8 idx = dev->driver_data - 1;
+
+		uc_pdata->ctrl_reg = tps80031_ldo_reg[CTRL][idx];
+		uc_pdata->volt_reg = tps80031_ldo_reg[VOLT][idx];
+	}
+
+	return 0;
+}
+
+static int ldo_get_value(struct udevice *dev)
+{
+	int uV;
+	int ret;
+
+	ret = tps80031_ldo_val(dev, PMIC_OP_GET, &uV);
+	if (ret)
+		return ret;
+
+	return uV;
+}
+
+static int ldo_set_value(struct udevice *dev, int uV)
+{
+	return tps80031_ldo_val(dev, PMIC_OP_SET, &uV);
+}
+
+static const struct dm_regulator_ops tps80031_ldo_ops = {
+	.get_value  = ldo_get_value,
+	.set_value  = ldo_set_value,
+	.get_enable = tps80031_get_enable,
+	.set_enable = tps80031_set_enable,
+};
+
+U_BOOT_DRIVER(tps80031_ldo) = {
+	.name = TPS80031_LDO_DRIVER,
+	.id = UCLASS_REGULATOR,
+	.ops = &tps80031_ldo_ops,
+	.probe = tps80031_ldo_probe,
+};
+
+struct tps80031_smps_priv {
+	int flags;
+};
+
+/* DCDC voltages for the selector of 0x39 to 0x3F */
+static int tps80031_dcdc_voltages[5] = {
+	1350000, 1500000, 1800000, 1900000, 2100000
+};
+
+/**
+ * tps80031_smps_volt2hex() - convert voltage in uV into
+ *			      applicable to register hex value
+ *
+ * @base:	base voltage in uV
+ * @uV:		voltage in uV
+ *
+ * Return: voltage in hex on success, -ve on failure
+ */
+static int tps80031_smps_volt2hex(u32 base, int uV)
+{
+	int i;
+
+	if (uV < base)
+		return 1;
+
+	if (uV > SMPS_VOLT_LINEAR) {
+		for (i = 0; i < ARRAY_SIZE(tps80031_dcdc_voltages); i++)
+			if (uV <= tps80031_dcdc_voltages[i])
+				break;
+
+		return SMPS_VOLT_NLINEAR_HEX + i;
+	}
+
+	return DIV_ROUND_UP(uV - base, 12500);
+}
+
+/**
+ * tps80031_smps_hex2volt() - convert register hex value into
+ *			      actual voltage in uV
+ *
+ * @base:	base voltage in uV
+ * @hex:	hex value of register
+ *
+ * Return: voltage in uV on success, -ve on failure
+ */
+static int tps80031_smps_hex2volt(u32 base, int hex)
+{
+	if (!hex)
+		return 0;
+
+	/* if reg value exceeds linear scale use table */
+	if (hex > SMPS_VOLT_LINEAR_HEX)
+		return tps80031_dcdc_voltages[hex - SMPS_VOLT_LINEAR_HEX];
+	else
+		return base + hex * 12500;
+}
+
+static int tps80031_smps_val(struct udevice *dev, int op, int *uV)
+{
+	struct dm_regulator_uclass_plat *uc_pdata =
+					dev_get_uclass_plat(dev);
+	struct tps80031_smps_priv *priv = dev_get_priv(dev);
+	u32 adr = uc_pdata->volt_reg;
+	int base, val, hex, ret;
+
+	/* If offset flag was set then base voltage is higher */
+	if (priv->flags & TPS80031_OFFSET_FLAG)
+		base = SMPS_VOLT_BASE_OFFSET;
+	else
+		base = SMPS_VOLT_BASE;
+
+	val = pmic_reg_read(dev->parent, adr);
+	if (val < 0)
+		return val;
+
+	if (op == PMIC_OP_GET) {
+		*uV = 0;
+
+		ret = tps80031_smps_hex2volt(base, val & SMPS_VOLT_MASK);
+		if (ret < 0)
+			return ret;
+
+		*uV = ret;
+		return 0;
+	}
+
+	hex = tps80031_smps_volt2hex(base, *uV);
+	if (hex < 0)
+		return hex;
+
+	val &= ~SMPS_VOLT_MASK;
+
+	return pmic_reg_write(dev->parent, adr, val | hex);
+}
+
+static int tps80031_smps_probe(struct udevice *dev)
+{
+	struct dm_regulator_uclass_plat *uc_pdata =
+					dev_get_uclass_plat(dev);
+	struct tps80031_smps_priv *priv = dev_get_priv(dev);
+	int idx = dev->driver_data - 1;
+	int val;
+
+	uc_pdata->type = REGULATOR_TYPE_BUCK;
+
+	uc_pdata->ctrl_reg = tps80031_smps_reg[CTRL][idx];
+	uc_pdata->volt_reg = tps80031_smps_reg[VOLT][idx];
+
+	/* Determine if smps regulator uses higher voltage */
+	val = pmic_reg_read(dev->parent, TPS80031_SMPS_OFFSET);
+	if (val & tps80031_smps_reg[OFFSET][idx])
+		priv->flags |= TPS80031_OFFSET_FLAG;
+
+	return 0;
+}
+
+static int smps_get_value(struct udevice *dev)
+{
+	int uV;
+	int ret;
+
+	ret = tps80031_smps_val(dev, PMIC_OP_GET, &uV);
+	if (ret)
+		return ret;
+
+	return uV;
+}
+
+static int smps_set_value(struct udevice *dev, int uV)
+{
+	return tps80031_smps_val(dev, PMIC_OP_SET, &uV);
+}
+
+static const struct dm_regulator_ops tps80031_smps_ops = {
+	.get_value  = smps_get_value,
+	.set_value  = smps_set_value,
+	.get_enable = tps80031_get_enable,
+	.set_enable = tps80031_set_enable,
+};
+
+U_BOOT_DRIVER(tps80031_smps) = {
+	.name = TPS80031_SMPS_DRIVER,
+	.id = UCLASS_REGULATOR,
+	.ops = &tps80031_smps_ops,
+	.probe = tps80031_smps_probe,
+	.priv_auto = sizeof(struct tps80031_smps_priv),
+};
-- 
2.39.2