[PATCH] power: regulator: tps6287x: Add driver for TPS6287x step down convertors
Keerthy
j-keerthy at ti.com
Fri May 31 07:50:41 CEST 2024
Add driver for TPS6287x step down convertors
Data sheet: https://www.ti.com/lit/ds/slvsgc5a/slvsgc5a.pdf
Signed-off-by: Keerthy <j-keerthy at ti.com>
---
drivers/power/regulator/Kconfig | 18 ++
drivers/power/regulator/Makefile | 1 +
drivers/power/regulator/tps6287x_regulator.c | 172 +++++++++++++++++++
3 files changed, 191 insertions(+)
create mode 100644 drivers/power/regulator/tps6287x_regulator.c
diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index 102ec7bc5f..db4b40c35e 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -375,6 +375,15 @@ config DM_REGULATOR_TPS80031
features for TPS80031/TPS80032 PMICs. The driver implements
get/set api for: value and enable.
+config DM_REGULATOR_TPS6287X
+ bool "Enable driver for TPS6287x Power Regulator"
+ depends on DM_REGULATOR
+ help
+ The TPS6287X is a step down converter with a fast transient
+ response. This driver supports all four variants of the chip
+ (TPS62870, TPS62871, TPS62872, TPS62873). It implements the
+ get/set api for value only, as the power line is always on.
+
config DM_REGULATOR_STPMIC1
bool "Enable driver for STPMIC1 regulators"
depends on DM_REGULATOR && PMIC_STPMIC1
@@ -394,6 +403,15 @@ config DM_REGULATOR_ANATOP
regulators. It is recommended that this option be enabled on
i.MX6 platform.
+config SPL_DM_REGULATOR_TPS6287X
+ bool "Enable driver for TPS6287x Power Regulator"
+ depends on SPL_DM_REGULATOR
+ help
+ The TPS6287X is a step down converter with a fast transient
+ response. This driver supports all four variants of the chip
+ (TPS62870, TPS62871, TPS62872, TPS62873). It implements the
+ get/set api for value only, as the power line is always on.
+
config SPL_DM_REGULATOR_STPMIC1
bool "Enable driver for STPMIC1 regulators in SPL"
depends on SPL_DM_REGULATOR && PMIC_STPMIC1
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index f79932d833..6335e5566d 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -34,6 +34,7 @@ obj-$(CONFIG_$(SPL_)DM_REGULATOR_STM32_VREFBUF) += stm32-vrefbuf.o
obj-$(CONFIG_DM_REGULATOR_TPS65910) += tps65910_regulator.o
obj-$(CONFIG_$(SPL_)DM_REGULATOR_TPS65911) += tps65911_regulator.o
obj-$(CONFIG_DM_REGULATOR_TPS62360) += tps62360_regulator.o
+obj-$(CONFIG_$(SPL_)DM_REGULATOR_TPS6287X) += tps6287x_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
diff --git a/drivers/power/regulator/tps6287x_regulator.c b/drivers/power/regulator/tps6287x_regulator.c
new file mode 100644
index 0000000000..6d18571919
--- /dev/null
+++ b/drivers/power/regulator/tps6287x_regulator.c
@@ -0,0 +1,172 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2024 Texas Instruments Incorporated - http://www.ti.com/
+ * Keerthy <j-keerthy at ti.com>
+ */
+
+#include <dm.h>
+#include <i2c.h>
+#include <dm/device_compat.h>
+#include <power/regulator.h>
+
+#define TPS6287X_REG_VSET 0x0
+#define TPS6287X_REG_CONTROL1 0x1
+#define TPS6287X_REG_CONTROL2 0x2
+#define TPS6287X_REG_CONTROL3 0x3
+#define TPS6287X_REG_STATUS 0x4
+#define TPS6287X_REG_VSET_VSET_MASK 0xff
+#define TPS6287X_REG_CONTROL2_VRANGE_MASK 0xc
+
+struct tps6287x_regulator_config {
+ u32 vmin;
+ u32 vmax;
+};
+
+struct tps6287x_regulator_pdata {
+ u8 vsel_offset;
+ struct udevice *i2c;
+ struct tps6287x_regulator_config *config;
+};
+
+static struct tps6287x_regulator_config tps6287x_data = {
+ .vmin = 400000,
+ .vmax = 3350000,
+};
+
+static int tps6287x_regulator_set_value(struct udevice *dev, int uV)
+{
+ struct tps6287x_regulator_pdata *pdata = dev_get_plat(dev);
+ u8 regval, vset;
+ int ret;
+
+ if (uV < pdata->config->vmin || uV > pdata->config->vmax)
+ return -EINVAL;
+ /*
+ * Based on the value of VRANGE bit field of CONTROL2 reg the range
+ * varies.
+ */
+ ret = dm_i2c_read(pdata->i2c, TPS6287X_REG_CONTROL2, ®val, 1);
+ if (ret) {
+ dev_err(dev, "CTRL2 reg read failed: %d\n", ret);
+ return ret;
+ }
+
+ regval &= TPS6287X_REG_CONTROL2_VRANGE_MASK;
+ regval >>= ffs(TPS6287X_REG_CONTROL2_VRANGE_MASK) - 1;
+
+ /*
+ * VRANGE = 0. Increment step 1250 uV starting with 0 --> 400000 uV
+ * VRANGE = 1. Increment step 2500 uV starting with 0 --> 400000 uV
+ * VRANGE = 2. Increment step 5000 uV starting with 0 --> 400000 uV
+ * VRANGE = 3. Increment step 10000 uV starting with 0 --> 800000 uV
+ */
+ switch (regval) {
+ case 0:
+ vset = (uV - 400000) / 1250;
+ break;
+ case 1:
+ vset = (uV - 400000) / 2500;
+ break;
+ case 2:
+ vset = (uV - 400000) / 5000;
+ break;
+ case 3:
+ vset = (uV - 800000) / 10000;
+ break;
+ default:
+ pr_err("%s: invalid regval %d\n", dev->name, regval);
+ return -EINVAL;
+ }
+
+ return dm_i2c_write(pdata->i2c, TPS6287X_REG_VSET, &vset, 1);
+}
+
+static int tps6287x_regulator_get_value(struct udevice *dev)
+{
+ u8 regval, vset;
+ int uV;
+ int ret;
+ struct tps6287x_regulator_pdata *pdata = dev_get_plat(dev);
+
+ /*
+ * Based on the value of VRANGE bit field of CONTROL2 reg the range
+ * varies.
+ */
+ ret = dm_i2c_read(pdata->i2c, TPS6287X_REG_CONTROL2, ®val, 1);
+ if (ret) {
+ dev_err(dev, "i2c read failed: %d\n", ret);
+ return ret;
+ }
+
+ regval &= TPS6287X_REG_CONTROL2_VRANGE_MASK;
+ regval >>= ffs(TPS6287X_REG_CONTROL2_VRANGE_MASK) - 1;
+
+ ret = dm_i2c_read(pdata->i2c, TPS6287X_REG_VSET, &vset, 1);
+ if (ret) {
+ dev_err(dev, "i2c VSET read failed: %d\n", ret);
+ return ret;
+ }
+
+ /*
+ * VRANGE = 0. Increment step 1250 uV starting with 0 --> 400000 uV
+ * VRANGE = 1. Increment step 2500 uV starting with 0 --> 400000 uV
+ * VRANGE = 2. Increment step 5000 uV starting with 0 --> 400000 uV
+ * VRANGE = 3. Increment step 10000 uV starting with 0 --> 800000 uV
+ */
+ switch (regval) {
+ case 0:
+ uV = 400000 + vset * 1250;
+ break;
+ case 1:
+ uV = 400000 + vset * 2500;
+ break;
+ case 2:
+ uV = 400000 + vset * 5000;
+ break;
+ case 3:
+ uV = 800000 + vset * 10000;
+ break;
+ default:
+ pr_err("%s: invalid regval %d\n", dev->name, regval);
+ return -EINVAL;
+ }
+
+ return uV;
+}
+
+static int tps6287x_regulator_probe(struct udevice *dev)
+{
+ struct tps6287x_regulator_pdata *pdata = dev_get_plat(dev);
+ int ret, slave_id;
+
+ pdata->config = (void *)dev_get_driver_data(dev);
+
+ slave_id = devfdt_get_addr_index(dev, 0);
+
+ ret = i2c_get_chip(dev->parent, slave_id, 1, &pdata->i2c);
+ if (ret) {
+ dev_err(dev, "i2c dev get failed.\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct dm_regulator_ops tps6287x_regulator_ops = {
+ .get_value = tps6287x_regulator_get_value,
+ .set_value = tps6287x_regulator_set_value,
+};
+
+static const struct udevice_id tps6287x_regulator_ids[] = {
+ { .compatible = "ti,tps62873", .data = (ulong)&tps6287x_data },
+ { },
+};
+
+U_BOOT_DRIVER(tps6287x_regulator) = {
+ .name = "tps6287x_regulator",
+ .id = UCLASS_REGULATOR,
+ .ops = &tps6287x_regulator_ops,
+ .of_match = tps6287x_regulator_ids,
+ .plat_auto = sizeof(struct tps6287x_regulator_pdata),
+ .probe = tps6287x_regulator_probe,
+};
--
2.17.1
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