diff mbox series

[RFC,v2,3/6] regulator: add regulators driver for Marvell 88PM886 PMIC

Message ID 20240211094609.2223-4-karelb@gimli.ms.mff.cuni.cz (mailing list archive)
State New
Headers show
Series support for Marvell 88PM886 PMIC | expand

Commit Message

Karel Balej Feb. 11, 2024, 9:35 a.m. UTC 
From: Karel Balej <balejk@matfyz.cz>

Support the LDO and buck regulators of the Marvell 88PM886 PMIC.

88PM886 LDOs match those of 88PM880 which also has several more of them.
88PM880 buck regulators descriptions do not match and they sit on a
different register page and thus need a separate I2C client and regmap.

Signed-off-by: Karel Balej <balejk@matfyz.cz>
---

Notes:
    RFC v2:
    - Drop of_compatible and related code.
    - Drop unused include.
    - Remove some abstraction: use only one regmap for all regulators and
      only mention 88PM886 in Kconfig description.
    - Reword commit message.

 drivers/regulator/88pm88x-regulator.c | 206 ++++++++++++++++++++++++++
 drivers/regulator/Kconfig             |   6 +
 drivers/regulator/Makefile            |   1 +
 3 files changed, 213 insertions(+)
 create mode 100644 drivers/regulator/88pm88x-regulator.c
diff mbox series

Patch

diff --git a/drivers/regulator/88pm88x-regulator.c b/drivers/regulator/88pm88x-regulator.c
new file mode 100644
index 000000000000..fd84b9604ac6
--- /dev/null
+++ b/drivers/regulator/88pm88x-regulator.c
@@ -0,0 +1,206 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/kernel.h>
+#include <linux/linear_range.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+#include <linux/mfd/88pm88x.h>
+
+#define PM88X_REG_LDO_EN1		0x09
+#define PM88X_REG_LDO_EN2		0x0a
+
+#define PM88X_REG_BUCK_EN		0x08
+
+#define PM88X_REG_LDO1_VOUT		0x20
+#define PM88X_REG_LDO2_VOUT		0x26
+#define PM88X_REG_LDO3_VOUT		0x2c
+#define PM88X_REG_LDO4_VOUT		0x32
+#define PM88X_REG_LDO5_VOUT		0x38
+#define PM88X_REG_LDO6_VOUT		0x3e
+#define PM88X_REG_LDO7_VOUT		0x44
+#define PM88X_REG_LDO8_VOUT		0x4a
+#define PM88X_REG_LDO9_VOUT		0x50
+#define PM88X_REG_LDO10_VOUT		0x56
+#define PM88X_REG_LDO11_VOUT		0x5c
+#define PM88X_REG_LDO12_VOUT		0x62
+#define PM88X_REG_LDO13_VOUT		0x68
+#define PM88X_REG_LDO14_VOUT		0x6e
+#define PM88X_REG_LDO15_VOUT		0x74
+#define PM88X_REG_LDO16_VOUT		0x7a
+
+#define PM886_REG_BUCK1_VOUT		0xa5
+#define PM886_REG_BUCK2_VOUT		0xb3
+#define PM886_REG_BUCK3_VOUT		0xc1
+#define PM886_REG_BUCK4_VOUT		0xcf
+#define PM886_REG_BUCK5_VOUT		0xdd
+
+#define PM88X_LDO_VSEL_MASK		0x0f
+#define PM88X_BUCK_VSEL_MASK		0x7f
+
+struct pm88x_regulator {
+	struct regulator_desc desc;
+	int max_uA;
+};
+
+static int pm88x_regulator_get_ilim(struct regulator_dev *rdev)
+{
+	struct pm88x_regulator *data = rdev_get_drvdata(rdev);
+
+	if (!data) {
+		dev_err(&rdev->dev, "Failed to get regulator data\n");
+		return -EINVAL;
+	}
+	return data->max_uA;
+}
+
+static const struct regulator_ops pm88x_ldo_ops = {
+	.list_voltage = regulator_list_voltage_table,
+	.map_voltage = regulator_map_voltage_iterate,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.get_current_limit = pm88x_regulator_get_ilim,
+};
+
+static const struct regulator_ops pm88x_buck_ops = {
+	.list_voltage = regulator_list_voltage_linear_range,
+	.map_voltage = regulator_map_voltage_linear_range,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.get_current_limit = pm88x_regulator_get_ilim,
+};
+
+static const unsigned int pm88x_ldo_volt_table1[] = {
+	1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
+};
+
+static const unsigned int pm88x_ldo_volt_table2[] = {
+	1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
+	2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
+};
+
+static const unsigned int pm88x_ldo_volt_table3[] = {
+	1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
+};
+
+static const struct linear_range pm88x_buck_volt_ranges1[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0, 79, 12500),
+	REGULATOR_LINEAR_RANGE(1600000, 80, 84, 50000),
+};
+
+static const struct linear_range pm88x_buck_volt_ranges2[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0, 79, 12500),
+	REGULATOR_LINEAR_RANGE(1600000, 80, 114, 50000),
+};
+
+static struct pm88x_regulator pm88x_ldo2 = {
+	.desc = {
+		.name = "LDO2",
+		.id = PM88X_REGULATOR_ID_LDO2,
+		.regulators_node = "regulators",
+		.of_match = "ldo2",
+		.ops = &pm88x_ldo_ops,
+		.type = REGULATOR_VOLTAGE,
+		.enable_reg = PM88X_REG_LDO_EN1,
+		.enable_mask = BIT(1),
+		.volt_table = pm88x_ldo_volt_table1,
+		.n_voltages = ARRAY_SIZE(pm88x_ldo_volt_table1),
+		.vsel_reg = PM88X_REG_LDO2_VOUT,
+		.vsel_mask = PM88X_LDO_VSEL_MASK,
+	},
+	.max_uA = 100000,
+};
+
+static struct pm88x_regulator pm88x_ldo15 = {
+	.desc = {
+		.name = "LDO15",
+		.id = PM88X_REGULATOR_ID_LDO15,
+		.regulators_node = "regulators",
+		.of_match = "ldo15",
+		.ops = &pm88x_ldo_ops,
+		.type = REGULATOR_VOLTAGE,
+		.enable_reg = PM88X_REG_LDO_EN2,
+		.enable_mask = BIT(6),
+		.volt_table = pm88x_ldo_volt_table2,
+		.n_voltages = ARRAY_SIZE(pm88x_ldo_volt_table2),
+		.vsel_reg = PM88X_REG_LDO15_VOUT,
+		.vsel_mask = PM88X_LDO_VSEL_MASK,
+	},
+	.max_uA = 200000,
+};
+
+static struct pm88x_regulator pm886_buck2 = {
+	.desc = {
+		.name = "buck2",
+		.id = PM886_REGULATOR_ID_BUCK2,
+		.regulators_node = "regulators",
+		.of_match = "buck2",
+		.ops = &pm88x_buck_ops,
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 115,
+		.linear_ranges = pm88x_buck_volt_ranges2,
+		.n_linear_ranges = ARRAY_SIZE(pm88x_buck_volt_ranges2),
+		.vsel_reg = PM886_REG_BUCK2_VOUT,
+		.vsel_mask = PM88X_BUCK_VSEL_MASK,
+		.enable_reg = PM88X_REG_BUCK_EN,
+		.enable_mask = BIT(1),
+	},
+	.max_uA = 1200000,
+};
+
+static struct pm88x_regulator *pm88x_regulators[] = {
+	[PM88X_REGULATOR_ID_LDO2] = &pm88x_ldo2,
+	[PM88X_REGULATOR_ID_LDO15] = &pm88x_ldo15,
+	[PM886_REGULATOR_ID_BUCK2] = &pm886_buck2,
+};
+
+static int pm88x_regulator_probe(struct platform_device *pdev)
+{
+	struct pm88x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+	struct regulator_config rcfg = { };
+	struct pm88x_regulator *regulator;
+	struct regulator_desc *rdesc;
+	struct regulator_dev *rdev;
+	int ret;
+
+	if (pdev->id < 0 || pdev->id >= PM88X_REGULATOR_ID_SENTINEL) {
+		dev_err(&pdev->dev, "Invalid regulator ID: %d\n", pdev->id);
+		return -EINVAL;
+	}
+
+	rcfg.dev = pdev->dev.parent;
+	regulator = pm88x_regulators[pdev->id];
+	rdesc = &regulator->desc;
+	rcfg.driver_data = regulator;
+	/* For 88PM886, regmap is the same for LDOs and bucks. */
+	rcfg.regmap = chip->regmaps[PM88X_REGMAP_LDO];
+	rdev = devm_regulator_register(&pdev->dev, rdesc, &rcfg);
+	if (IS_ERR(rdev)) {
+		ret = PTR_ERR(rdev);
+		dev_err(&pdev->dev, "Failed to register %s: %d",
+				rdesc->name, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct platform_driver pm88x_regulator_driver = {
+	.driver = {
+		.name = "88pm88x-regulator",
+	},
+	.probe = pm88x_regulator_probe,
+};
+module_platform_driver(pm88x_regulator_driver);
+
+MODULE_DESCRIPTION("Marvell 88PM88X PMIC regulator driver");
+MODULE_AUTHOR("Karel Balej <balejk@matfyz.cz>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 550145f82726..8872d0434412 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -91,6 +91,12 @@  config REGULATOR_88PM8607
 	help
 	  This driver supports 88PM8607 voltage regulator chips.
 
+config REGULATOR_88PM88X
+	tristate "Marvell 88PM886 voltage regulators"
+	depends on MFD_88PM88X_PMIC
+	help
+	  This driver implements support for Marvell 88PM886 voltage regulators.
+
 config REGULATOR_ACT8865
 	tristate "Active-semi act8865 voltage regulator"
 	depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 46fb569e6be8..6cfe9bb7ba2e 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -14,6 +14,7 @@  obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o
 obj-$(CONFIG_REGULATOR_88PG86X) += 88pg86x.o
 obj-$(CONFIG_REGULATOR_88PM800) += 88pm800-regulator.o
 obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
+obj-$(CONFIG_REGULATOR_88PM88X) += 88pm88x-regulator.o
 obj-$(CONFIG_REGULATOR_CROS_EC) += cros-ec-regulator.o
 obj-$(CONFIG_REGULATOR_CPCAP) += cpcap-regulator.o
 obj-$(CONFIG_REGULATOR_AAT2870) += aat2870-regulator.o