* [PATCH v4 1/2] regulator: max77503: Add ADI MAX77503 support
2023-10-22 18:52 [PATCH v4 0/2] Add ADI MAX77503 regulator driver and bindings Gokhan Celik
@ 2023-10-22 18:52 ` Gokhan Celik
2023-10-22 18:52 ` [PATCH v4 2/2] regulator: dt-bindings: " Gokhan Celik
2023-10-23 17:00 ` [PATCH v4 0/2] Add ADI MAX77503 regulator driver and bindings Mark Brown
2 siblings, 0 replies; 4+ messages in thread
From: Gokhan Celik @ 2023-10-22 18:52 UTC (permalink / raw)
To: outreachy
Cc: Liam Girdwood, Mark Brown, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Gokhan Celik, linux-kernel, devicetree,
Gokhan Celik
Add ADI MAX77503 buck converter driver support.
Signed-off-by: Gokhan Celik <gokhan.celik@analog.com>
---
Changelog:
V3 -> V4: The kernel is updated
drivers/regulator/Kconfig | 10 ++
drivers/regulator/Makefile | 1 +
drivers/regulator/max77503-regulator.c | 137 +++++++++++++++++++++++++
3 files changed, 148 insertions(+)
create mode 100644 drivers/regulator/max77503-regulator.c
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 965d4f0c18a6..f3ec24691378 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -564,6 +564,16 @@ config REGULATOR_MAX5970
The MAX5970/5978 is a smart switch with no output regulation, but
fault protection and voltage and current monitoring capabilities.
+config REGULATOR_MAX77503
+ tristate "Analog Devices MAX77503 Regulator"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ This driver controls a Analog Devices MAX77503 14V input, 1.5A
+ high-efficiency buck converter via I2C bus.
+ Say M here if you want to include support for the regulator as a
+ module.
+
config REGULATOR_MAX77541
tristate "Analog Devices MAX77541/77540 Regulator"
depends on MFD_MAX77541
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 23074714a81a..b2b059b5ee56 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -69,6 +69,7 @@ obj-$(CONFIG_REGULATOR_LTC3676) += ltc3676.o
obj-$(CONFIG_REGULATOR_MAX14577) += max14577-regulator.o
obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
obj-$(CONFIG_REGULATOR_MAX5970) += max5970-regulator.o
+obj-$(CONFIG_REGULATOR_MAX77503) += max77503-regulator.o
obj-$(CONFIG_REGULATOR_MAX77541) += max77541-regulator.o
obj-$(CONFIG_REGULATOR_MAX77620) += max77620-regulator.o
obj-$(CONFIG_REGULATOR_MAX77650) += max77650-regulator.o
diff --git a/drivers/regulator/max77503-regulator.c b/drivers/regulator/max77503-regulator.c
new file mode 100644
index 000000000000..4a6ba4dd2acd
--- /dev/null
+++ b/drivers/regulator/max77503-regulator.c
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2023 Analog Devices, Inc.
+ * ADI regulator driver for MAX77503.
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/util_macros.h>
+
+#define MAX77503_REG_CFG 0x00
+#define MAX77503_REG_VOUT 0x01
+
+#define MAX77503_BIT_EN BIT(0)
+#define MAX77503_BIT_CURR_LIM BIT(3)
+#define MAX77503_BIT_ADEN BIT(6)
+
+#define MAX77503_BITS_SOFT_START GENMASK(5, 4)
+#define MAX77503_BITS_MX_VOUT GENMASK(7, 0)
+
+#define MAX77503_AD_ENABLED 0x1
+#define MAX77503_AD_DISABLED 0x0
+
+struct max77503_dev {
+ struct device *dev;
+ struct device_node *of_node;
+ struct regulator_desc desc;
+ struct regulator_dev *rdev;
+ struct regmap *regmap;
+};
+
+static const struct regmap_config max77503_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = 0x2,
+};
+
+static const struct regulator_ops max77503_buck_ops = {
+ .list_voltage = regulator_list_voltage_linear_range,
+ .map_voltage = regulator_map_voltage_ascend,
+ .is_enabled = regulator_is_enabled_regmap,
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_current_limit = regulator_get_current_limit_regmap,
+ .set_current_limit = regulator_set_current_limit_regmap,
+ .set_active_discharge = regulator_set_active_discharge_regmap,
+ .set_soft_start = regulator_set_soft_start_regmap,
+};
+
+static const struct linear_range max77503_buck_ranges[] = {
+ REGULATOR_LINEAR_RANGE(800000, 0x00, 0x54, 50000)
+};
+
+static const unsigned int max77503_current_limit_table[] = {
+ 500000, 2000000
+};
+
+static const struct regulator_desc max77503_regulators_desc = {
+ .name = "max77503",
+ .enable_reg = MAX77503_REG_CFG,
+ .enable_mask = MAX77503_BIT_EN,
+ .ops = &max77503_buck_ops,
+ .type = REGULATOR_VOLTAGE,
+ .linear_ranges = max77503_buck_ranges,
+ .n_linear_ranges = ARRAY_SIZE(max77503_buck_ranges),
+ .vsel_reg = MAX77503_REG_VOUT,
+ .vsel_mask = MAX77503_BITS_MX_VOUT,
+ .soft_start_reg = MAX77503_REG_CFG,
+ .soft_start_mask = MAX77503_BITS_SOFT_START,
+ .active_discharge_reg = MAX77503_REG_CFG,
+ .active_discharge_mask = MAX77503_BIT_ADEN,
+ .active_discharge_off = MAX77503_AD_DISABLED,
+ .active_discharge_on = MAX77503_AD_ENABLED,
+ .csel_reg = MAX77503_REG_CFG,
+ .csel_mask = MAX77503_BIT_CURR_LIM,
+ .curr_table = max77503_current_limit_table,
+ .n_current_limits = ARRAY_SIZE(max77503_current_limit_table),
+ .owner = THIS_MODULE,
+};
+
+static int max77503_regulator_probe(struct i2c_client *client)
+{
+ struct device *dev = &client->dev;
+ struct regulator_config config = {};
+ struct regulator_dev *rdev;
+
+ config.dev = dev;
+ config.of_node = dev->of_node;
+ config.regmap = devm_regmap_init_i2c(client, &max77503_regmap_config);
+ if (IS_ERR(config.regmap)) {
+ dev_err(dev, "Failed to init regmap");
+ return PTR_ERR(config.regmap);
+ }
+
+ rdev = devm_regulator_register(dev, &max77503_regulators_desc, &config);
+ if (IS_ERR(rdev)) {
+ dev_err(dev, "Failed to register regulator MAX77503");
+ return PTR_ERR(rdev);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id of_max77503_match_tbl[] = {
+ { .compatible = "adi,max77503", },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, of_max77503_match_tbl);
+
+static const struct i2c_device_id max77503_regulator_id[] = {
+ {"max77503"},
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, max77503_regulator_id);
+
+static struct i2c_driver max77503_regulator_driver = {
+ .driver = {
+ .name = "max77503",
+ .of_match_table = of_max77503_match_tbl
+ },
+ .probe = max77503_regulator_probe,
+ .id_table = max77503_regulator_id,
+};
+
+module_i2c_driver(max77503_regulator_driver);
+
+MODULE_AUTHOR("Gokhan Celik <Gokhan.Celik@analog.com>");
+MODULE_DESCRIPTION("MAX77503 regulator driver");
+MODULE_LICENSE("GPL");
--
2.34.1
^ permalink raw reply related [flat|nested] 4+ messages in thread* [PATCH v4 2/2] regulator: dt-bindings: Add ADI MAX77503 support
2023-10-22 18:52 [PATCH v4 0/2] Add ADI MAX77503 regulator driver and bindings Gokhan Celik
2023-10-22 18:52 ` [PATCH v4 1/2] regulator: max77503: Add ADI MAX77503 support Gokhan Celik
@ 2023-10-22 18:52 ` Gokhan Celik
2023-10-23 17:00 ` [PATCH v4 0/2] Add ADI MAX77503 regulator driver and bindings Mark Brown
2 siblings, 0 replies; 4+ messages in thread
From: Gokhan Celik @ 2023-10-22 18:52 UTC (permalink / raw)
To: outreachy
Cc: Liam Girdwood, Mark Brown, Rob Herring, Krzysztof Kozlowski,
Conor Dooley, Gokhan Celik, linux-kernel, devicetree,
Gokhan Celik, Conor Dooley
Add ADI MAX77503 buck converter devicetree document.
Signed-off-by: Gokhan Celik <gokhan.celik@analog.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
---
Changelog:
V2 -> V3: Addressed the review comments
.../regulator/adi,max77503-regulator.yaml | 50 +++++++++++++++++++
1 file changed, 50 insertions(+)
create mode 100644 Documentation/devicetree/bindings/regulator/adi,max77503-regulator.yaml
diff --git a/Documentation/devicetree/bindings/regulator/adi,max77503-regulator.yaml b/Documentation/devicetree/bindings/regulator/adi,max77503-regulator.yaml
new file mode 100644
index 000000000000..aa581e550be2
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/adi,max77503-regulator.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright (c) 2023 Analog Devices, Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/adi,max77503-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices MAX77503 Buck Converter
+
+maintainers:
+ - Gokhan Celik <Gokhan.Celik@analog.com>
+
+description: |
+ The Analog Devices MAX77503 is a single channel 14V input, 1.5A
+ high-efficiency buck converter. This converter has 94% efficiency
+ for 2-Cell/3-Cell battery applications.
+
+allOf:
+ - $ref: regulator.yaml#
+
+properties:
+ compatible:
+ enum:
+ - adi,max77503
+
+ reg:
+ description: I2C address of the device
+ items:
+ - enum: [0x1e, 0x24, 0x37]
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ regulator@1e {
+ compatible = "adi,max77503";
+ reg = <0x1e>;
+
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <5000000>;
+ };
+ };
--
2.34.1
^ permalink raw reply related [flat|nested] 4+ messages in thread