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Message-ID: <20230502-tps6287x-driver-v3-2-e25140a023f5@axis.com>
Date: Mon, 8 May 2023 15:14:08 +0200
From: Mårten Lindahl <marten.lindahl@...s.com>
To: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
"Rob Herring" <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
<kernel@...s.com>,
Mårten Lindahl <marten.lindahl@...s.com>
Subject: [PATCH v3 2/2] regulator: Add support for TI TPS6287x regulators
Add support for Texas Instruments TPS6287x, single-channel
synchronous step-down converters with four output voltage ranges.
Signed-off-by: Mårten Lindahl <marten.lindahl@...s.com>
---
drivers/regulator/Kconfig | 11 ++
drivers/regulator/Makefile | 1 +
drivers/regulator/tps6287x-regulator.c | 188 +++++++++++++++++++++++++++++++++
3 files changed, 200 insertions(+)
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index aae28d0a489c..d7923ac53f53 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -1374,6 +1374,17 @@ config REGULATOR_TPS6286X
high-frequency synchronous step-down converters with an I2C
interface.
+config REGULATOR_TPS6287X
+ tristate "TI TPS6287x Power Regulator"
+ depends on I2C && OF
+ select REGMAP_I2C
+ help
+ This driver supports TPS6287x voltage regulator chips. These are
+ pin-to-pin high-frequency synchronous step-down dc-dc converters
+ with an I2C interface.
+
+ If built as a module it will be called tps6287x-regulator.
+
config REGULATOR_TPS65023
tristate "TI TPS65023 Power regulators"
depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index ee383d8fc835..857995db3fa4 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -161,6 +161,7 @@ obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o
obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
obj-$(CONFIG_REGULATOR_TPS6286X) += tps6286x-regulator.o
+obj-$(CONFIG_REGULATOR_TPS6287X) += tps6287x-regulator.o
obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
obj-$(CONFIG_REGULATOR_TPS65086) += tps65086-regulator.o
diff --git a/drivers/regulator/tps6287x-regulator.c b/drivers/regulator/tps6287x-regulator.c
new file mode 100644
index 000000000000..d7fc82175493
--- /dev/null
+++ b/drivers/regulator/tps6287x-regulator.c
@@ -0,0 +1,188 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2023 Axis Communications AB
+ *
+ * Driver for Texas Instruments TPS6287x PMIC.
+ * Datasheet: https://www.ti.com/lit/ds/symlink/tps62873.pdf
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/driver.h>
+#include <linux/bitfield.h>
+#include <linux/linear_range.h>
+
+#define TPS6287X_VSET 0x00
+#define TPS6287X_CTRL1 0x01
+#define TPS6287X_CTRL1_VRAMP GENMASK(1, 0)
+#define TPS6287X_CTRL1_FPWMEN BIT(4)
+#define TPS6287X_CTRL1_SWEN BIT(5)
+#define TPS6287X_CTRL2 0x02
+#define TPS6287X_CTRL2_VRANGE GENMASK(3, 2)
+#define TPS6287X_CTRL3 0x03
+#define TPS6287X_STATUS 0x04
+
+static const struct regmap_config tps6287x_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = TPS6287X_STATUS,
+};
+
+static const struct linear_range tps6287x_voltage_ranges[] = {
+ LINEAR_RANGE(400000, 0, 0xFF, 1250),
+ LINEAR_RANGE(400000, 0, 0xFF, 2500),
+ LINEAR_RANGE(400000, 0, 0xFF, 5000),
+ LINEAR_RANGE(800000, 0, 0xFF, 10000),
+};
+
+static const unsigned int tps6287x_voltage_range_sel[] = {
+ 0x0, 0x4, 0x8, 0xC
+};
+
+static const unsigned int tps6287x_ramp_table[] = {
+ 10000, 5000, 1250, 500
+};
+
+static int tps6287x_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+ unsigned int val;
+
+ switch (mode) {
+ case REGULATOR_MODE_NORMAL:
+ val = 0;
+ break;
+ case REGULATOR_MODE_FAST:
+ val = TPS6287X_CTRL1_FPWMEN;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return regmap_update_bits(rdev->regmap, TPS6287X_CTRL1,
+ TPS6287X_CTRL1_FPWMEN, val);
+}
+
+static unsigned int tps6287x_get_mode(struct regulator_dev *rdev)
+{
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(rdev->regmap, TPS6287X_CTRL1, &val);
+ if (ret < 0)
+ return 0;
+
+ return (val & TPS6287X_CTRL1_FPWMEN) ? REGULATOR_MODE_FAST :
+ REGULATOR_MODE_NORMAL;
+}
+
+static unsigned int tps6287x_of_map_mode(unsigned int mode)
+{
+ switch (mode) {
+ case REGULATOR_MODE_NORMAL:
+ case REGULATOR_MODE_FAST:
+ return mode;
+ default:
+ return REGULATOR_MODE_INVALID;
+ }
+}
+
+static const struct regulator_ops tps6287x_regulator_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .set_mode = tps6287x_set_mode,
+ .get_mode = tps6287x_get_mode,
+ .is_enabled = regulator_is_enabled_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_pickable_regmap,
+ .list_voltage = regulator_list_voltage_pickable_linear_range,
+ .set_ramp_delay = regulator_set_ramp_delay_regmap,
+};
+
+static struct regulator_desc tps6287x_reg = {
+ .name = "tps6287x",
+ .owner = THIS_MODULE,
+ .ops = &tps6287x_regulator_ops,
+ .of_map_mode = tps6287x_of_map_mode,
+ .type = REGULATOR_VOLTAGE,
+ .enable_reg = TPS6287X_CTRL1,
+ .enable_mask = TPS6287X_CTRL1_SWEN,
+ .vsel_reg = TPS6287X_VSET,
+ .vsel_mask = 0xFF,
+ .vsel_range_reg = TPS6287X_CTRL2,
+ .vsel_range_mask = TPS6287X_CTRL2_VRANGE,
+ .ramp_reg = TPS6287X_CTRL1,
+ .ramp_mask = TPS6287X_CTRL1_VRAMP,
+ .ramp_delay_table = tps6287x_ramp_table,
+ .n_ramp_values = ARRAY_SIZE(tps6287x_ramp_table),
+ .linear_ranges = tps6287x_voltage_ranges,
+ .n_linear_ranges = ARRAY_SIZE(tps6287x_voltage_ranges),
+ .linear_range_selectors = tps6287x_voltage_range_sel,
+};
+
+static int tps6287x_i2c_probe(struct i2c_client *i2c)
+{
+ struct device *dev = &i2c->dev;
+ struct regulator_config config = {};
+ struct regulator_dev *rdev;
+
+ config.regmap = devm_regmap_init_i2c(i2c, &tps6287x_regmap_config);
+ if (IS_ERR(config.regmap)) {
+ dev_err(dev, "Failed to init i2c\n");
+ return PTR_ERR(config.regmap);
+ }
+
+ config.dev = dev;
+ config.of_node = dev->of_node;
+ config.init_data = of_get_regulator_init_data(dev, dev->of_node,
+ &tps6287x_reg);
+
+ rdev = devm_regulator_register(dev, &tps6287x_reg, &config);
+ if (IS_ERR(rdev)) {
+ dev_err(dev, "Failed to register regulator\n");
+ return PTR_ERR(rdev);
+ }
+
+ dev_dbg(dev, "Probed regulator\n");
+
+ return 0;
+}
+
+static const struct of_device_id tps6287x_dt_ids[] = {
+ { .compatible = "ti,tps62870", },
+ { .compatible = "ti,tps62871", },
+ { .compatible = "ti,tps62872", },
+ { .compatible = "ti,tps62873", },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, tps6287x_dt_ids);
+
+static const struct i2c_device_id tps6287x_i2c_id[] = {
+ { "tps62870", 0 },
+ { "tps62871", 0 },
+ { "tps62872", 0 },
+ { "tps62873", 0 },
+ {},
+};
+
+MODULE_DEVICE_TABLE(i2c, tps6287x_i2c_id);
+
+static struct i2c_driver tps6287x_regulator_driver = {
+ .driver = {
+ .name = "tps6287x",
+ .of_match_table = tps6287x_dt_ids,
+ },
+ .probe_new = tps6287x_i2c_probe,
+ .id_table = tps6287x_i2c_id,
+};
+
+module_i2c_driver(tps6287x_regulator_driver);
+
+MODULE_AUTHOR("Mårten Lindahl <marten.lindahl@...s.com>");
+MODULE_DESCRIPTION("Regulator driver for TI TPS6287X PMIC");
+MODULE_LICENSE("GPL");
--
2.30.2
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