power: regulator: tps6287x: Add driver for TPS6287x step down convertors

Add driver for TPS6287x step down convertors

Data sheet: https://www.ti.com/lit/ds/slvsgc5a/slvsgc5a.pdf

Signed-off-by: Keerthy <j-keerthy@ti.com>

diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index bc061c20d75eb9996c6e93fa3dcf4c04340ef909..958f337c7e738aa3e05d53038fddabc3673e3f5c 100644 (file)
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -383,6 +383,15 @@ 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
@@ -402,6 +411,15 @@ 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 56a527612b7486534719b37616dbb19bc2681ae7..54db0885657edcf21f4a429a1bdbcee1fc154b37 100644 (file)
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -35,6 +35,7 @@ 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 (file)
index 0000000..6d18571
--- /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@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, &regval, 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, &regval, 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,
+};