regulator: add driver for the TPS65219 BUCK & LDO regulators
The TPS65219 I2S PMIC features 3 Buck converters and 4 linear regulators,
2 GPOs, 1 GPIO, and 3 multi-function-pin.
This adds the driver for the Buck converters & linear regulators.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/drivers/power/regulator/tps65219_regulator.c b/drivers/power/regulator/tps65219_regulator.c
new file mode 100644
index 0000000..023cf21
--- /dev/null
+++ b/drivers/power/regulator/tps65219_regulator.c
@@ -0,0 +1,380 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2022 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ *
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <errno.h>
+#include <dm.h>
+#include <i2c.h>
+#include <log.h>
+#include <linux/delay.h>
+#include <power/pmic.h>
+#include <power/regulator.h>
+#include <power/tps65219.h>
+
+static const unsigned int tps65219_buck_vout[TPS65219_BUCK_NUM] = {
+ [0] = TPS65219_BUCK1_VOUT_REG,
+ [1] = TPS65219_BUCK2_VOUT_REG,
+ [2] = TPS65219_BUCK3_VOUT_REG
+};
+
+static const unsigned int tps65219_ldo_vout[TPS65219_LDO_NUM] = {
+ [0] = TPS65219_LDO1_VOUT_REG,
+ [1] = TPS65219_LDO2_VOUT_REG,
+ [2] = TPS65219_LDO3_VOUT_REG,
+ [3] = TPS65219_LDO4_VOUT_REG,
+};
+
+static int tps65219_reg_enable(struct udevice *dev, unsigned int adr, int idx,
+ int op, bool *enable)
+{
+ int ret;
+
+ ret = pmic_reg_read(dev->parent, adr);
+ if (ret < 0)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ if (ret & BIT(idx))
+ *enable = true;
+ else
+ *enable = false;
+
+ return 0;
+ } else if (op == PMIC_OP_SET) {
+ if (*enable)
+ ret |= BIT(idx);
+ else
+ ret &= ~BIT(idx);
+
+ ret = pmic_reg_write(dev->parent, adr, ret);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int tps65219_buck_enable(struct udevice *dev, int op, bool *enable)
+{
+ unsigned int adr;
+ struct dm_regulator_uclass_plat *uc_pdata;
+ int idx;
+
+ idx = dev->driver_data - 1;
+ uc_pdata = dev_get_uclass_plat(dev);
+ adr = uc_pdata->ctrl_reg;
+
+ return tps65219_reg_enable(dev, adr, idx, op, enable);
+}
+
+static int tps65219_buck_volt2val(int uV)
+{
+ if (uV > TPS65219_BUCK_VOLT_MAX)
+ return -EINVAL;
+ else if (uV >= 1400000)
+ return (uV - 1400000) / 100000 + 0x20;
+ else if (uV >= 600000)
+ return (uV - 600000) / 25000 + 0x00;
+ else
+ return -EINVAL;
+}
+
+static int tps65219_buck_val2volt(int val)
+{
+ if (val > TPS65219_VOLT_MASK)
+ return -EINVAL;
+ else if (val > 0x34)
+ return TPS65219_BUCK_VOLT_MAX;
+ else if (val > 0x20)
+ return 1400000 + (val - 0x20) * 100000;
+ else if (val >= 0)
+ return 600000 + val * 25000;
+ else
+ return -EINVAL;
+}
+
+static int tps65219_buck_val(struct udevice *dev, int op, int *uV)
+{
+ unsigned int adr;
+ int ret, val;
+ struct dm_regulator_uclass_plat *uc_pdata;
+
+ uc_pdata = dev_get_uclass_plat(dev);
+ adr = uc_pdata->volt_reg;
+
+ ret = pmic_reg_read(dev->parent, adr);
+ if (ret < 0)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ *uV = 0;
+
+ ret &= TPS65219_VOLT_MASK;
+ ret = tps65219_buck_val2volt(ret);
+ if (ret < 0)
+ return ret;
+
+ *uV = ret;
+ return 0;
+ }
+
+ val = tps65219_buck_volt2val(*uV);
+ if (val < 0)
+ return val;
+
+ ret &= ~TPS65219_VOLT_MASK;
+ ret |= val;
+
+ ret = pmic_reg_write(dev->parent, adr, ret);
+
+ udelay(100);
+
+ return ret;
+}
+
+static int tps65219_ldo_enable(struct udevice *dev, int op, bool *enable)
+{
+ unsigned int adr;
+ struct dm_regulator_uclass_plat *uc_pdata;
+ int idx;
+
+ idx = TPS65219_BUCK_NUM + (dev->driver_data - 1);
+ uc_pdata = dev_get_uclass_plat(dev);
+ adr = uc_pdata->ctrl_reg;
+
+ return tps65219_reg_enable(dev, adr, idx, op, enable);
+}
+
+static int tps65219_ldo_volt2val(int idx, int uV)
+{
+ int base = TPS65219_LDO12_VOLT_MIN;
+ int max = TPS65219_LDO12_VOLT_MAX;
+
+ if (idx > 1) {
+ base = TPS65219_LDO34_VOLT_MIN;
+ max = TPS65219_LDO34_VOLT_MAX;
+ }
+
+ if (uV > max)
+ return -EINVAL;
+ else if (uV >= base)
+ return (uV - TPS65219_LDO12_VOLT_MIN) / 50000;
+ else
+ return -EINVAL;
+}
+
+static int tps65219_ldo_val2volt(int idx, int val)
+{
+ int reg_base = TPS65219_LDO12_VOLT_REG_MIN;
+ int reg_max = TPS65219_LDO12_VOLT_REG_MAX;
+ int base = TPS65219_LDO12_VOLT_MIN;
+ int max = TPS65219_LDO12_VOLT_MAX;
+
+ if (idx > 1) {
+ base = TPS65219_LDO34_VOLT_MIN;
+ max = TPS65219_LDO34_VOLT_MAX;
+ reg_base = TPS65219_LDO34_VOLT_REG_MIN;
+ reg_max = TPS65219_LDO34_VOLT_REG_MAX;
+ }
+
+ if (val > TPS65219_VOLT_MASK || val < 0)
+ return -EINVAL;
+ else if (val >= reg_max)
+ return max;
+ else if (val <= reg_base)
+ return base;
+ else if (val >= 0)
+ return TPS65219_LDO12_VOLT_MIN + (50000 * val);
+ else
+ return -EINVAL;
+}
+
+static int tps65219_ldo_val(struct udevice *dev, int op, int *uV)
+{
+ unsigned int adr;
+ int ret, val;
+ struct dm_regulator_uclass_plat *uc_pdata;
+ int idx;
+
+ idx = dev->driver_data - 1;
+ uc_pdata = dev_get_uclass_plat(dev);
+ adr = uc_pdata->volt_reg;
+
+ ret = pmic_reg_read(dev->parent, adr);
+ if (ret < 0)
+ return ret;
+
+ if (op == PMIC_OP_GET) {
+ *uV = 0;
+
+ ret &= TPS65219_VOLT_MASK;
+ ret = tps65219_ldo_val2volt(idx, ret);
+ if (ret < 0)
+ return ret;
+
+ *uV = ret;
+ return 0;
+ }
+
+ /* LDO1 & LDO2 in BYPASS mode only supports 1.5V max */
+ if (idx < 2 &&
+ (ret & BIT(TPS65219_LDO12_BYP_CONFIG)) &&
+ *uV < TPS65219_LDO12_VOLT_BYP_MIN)
+ return -EINVAL;
+
+ val = tps65219_ldo_volt2val(idx, *uV);
+ if (val < 0)
+ return val;
+
+ ret &= ~TPS65219_VOLT_MASK;
+ ret |= val;
+
+ ret = pmic_reg_write(dev->parent, adr, ret);
+
+ udelay(100);
+
+ return ret;
+}
+
+static int tps65219_ldo_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_plat *uc_pdata;
+ int idx;
+
+ uc_pdata = dev_get_uclass_plat(dev);
+ uc_pdata->type = REGULATOR_TYPE_LDO;
+
+ /* idx must be in 1..TPS65219_LDO_NUM */
+ idx = dev->driver_data;
+ if (idx < 1 || idx > TPS65219_LDO_NUM) {
+ printf("Wrong ID for regulator\n");
+ return -EINVAL;
+ }
+
+ uc_pdata->ctrl_reg = TPS65219_ENABLE_CTRL_REG;
+ uc_pdata->volt_reg = tps65219_ldo_vout[idx - 1];
+
+ return 0;
+}
+
+static int tps65219_buck_probe(struct udevice *dev)
+{
+ struct dm_regulator_uclass_plat *uc_pdata;
+ int idx;
+
+ uc_pdata = dev_get_uclass_plat(dev);
+ uc_pdata->type = REGULATOR_TYPE_BUCK;
+
+ /* idx must be in 1..TPS65219_BUCK_NUM */
+ idx = dev->driver_data;
+ if (idx < 1 || idx > TPS65219_BUCK_NUM) {
+ printf("Wrong ID for regulator\n");
+ return -EINVAL;
+ }
+
+ uc_pdata->ctrl_reg = TPS65219_ENABLE_CTRL_REG;
+ uc_pdata->volt_reg = tps65219_buck_vout[idx - 1];
+
+ return 0;
+}
+
+static int ldo_get_value(struct udevice *dev)
+{
+ int uV;
+ int ret;
+
+ ret = tps65219_ldo_val(dev, PMIC_OP_GET, &uV);
+ if (ret)
+ return ret;
+
+ return uV;
+}
+
+static int ldo_set_value(struct udevice *dev, int uV)
+{
+ return tps65219_ldo_val(dev, PMIC_OP_SET, &uV);
+}
+
+static int ldo_get_enable(struct udevice *dev)
+{
+ bool enable = false;
+ int ret;
+
+ ret = tps65219_ldo_enable(dev, PMIC_OP_GET, &enable);
+ if (ret)
+ return ret;
+
+ return enable;
+}
+
+static int ldo_set_enable(struct udevice *dev, bool enable)
+{
+ return tps65219_ldo_enable(dev, PMIC_OP_SET, &enable);
+}
+
+static int buck_get_value(struct udevice *dev)
+{
+ int uV;
+ int ret;
+
+ ret = tps65219_buck_val(dev, PMIC_OP_GET, &uV);
+ if (ret)
+ return ret;
+
+ return uV;
+}
+
+static int buck_set_value(struct udevice *dev, int uV)
+{
+ return tps65219_buck_val(dev, PMIC_OP_SET, &uV);
+}
+
+static int buck_get_enable(struct udevice *dev)
+{
+ bool enable = false;
+ int ret;
+
+ ret = tps65219_buck_enable(dev, PMIC_OP_GET, &enable);
+ if (ret)
+ return ret;
+
+ return enable;
+}
+
+static int buck_set_enable(struct udevice *dev, bool enable)
+{
+ return tps65219_buck_enable(dev, PMIC_OP_SET, &enable);
+}
+
+static const struct dm_regulator_ops tps65219_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(tps65219_ldo) = {
+ .name = TPS65219_LDO_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &tps65219_ldo_ops,
+ .probe = tps65219_ldo_probe,
+};
+
+static const struct dm_regulator_ops tps65219_buck_ops = {
+ .get_value = buck_get_value,
+ .set_value = buck_set_value,
+ .get_enable = buck_get_enable,
+ .set_enable = buck_set_enable,
+};
+
+U_BOOT_DRIVER(tps65219_buck) = {
+ .name = TPS65219_BUCK_DRIVER,
+ .id = UCLASS_REGULATOR,
+ .ops = &tps65219_buck_ops,
+ .probe = tps65219_buck_probe,
+};