[PATCH v2 2/8] regulator: max77658: Add ADI MAX77643/54/58/59 Regulator Support

From: Zeynep Arslanbenzer
Date: Wed Mar 22 2023 - 01:58:04 EST

Regulator driver for ADI MAX77643/MAX77654/MAX77658/MAX77659.

MAX77643/MAX77659 has 1 LDO regulator.
MAX77654/MAX77658 has two LDO regulators.

Signed-off-by: Nurettin Bolucu <Nurettin.Bolucu@xxxxxxxxxx>
Signed-off-by: Zeynep Arslanbenzer <Zeynep.Arslanbenzer@xxxxxxxxxx>
---
drivers/regulator/Kconfig | 8 ++
drivers/regulator/Makefile | 1 +
drivers/regulator/max77658-regulator.c | 171 +++++++++++++++++++++++++
3 files changed, 180 insertions(+)
create mode 100644 drivers/regulator/max77658-regulator.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 820c9a0788e5..98591d637d0c 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -573,6 +573,14 @@ config REGULATOR_MAX77650
Semiconductor. This device has a SIMO with three independent
power rails and an LDO.

+config REGULATOR_MAX77658
+ tristate "Analog Devices MAX77643/MAX77654/MAX77658/MAX77659 Regulator"
+ depends on MFD_MAX77658
+ help
+ Regulator driver for MAX77643/MAX77654/MAX77658/MAX77659
+ PMIC from Analog Devices. This driver supports LDO regulators.
+ Say Y here to enable the regulator driver.
+
config REGULATOR_MAX8649
tristate "Maxim 8649 voltage regulator"
depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index b9f5eb35bf5f..14b5f9fd75bf 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
obj-$(CONFIG_REGULATOR_MAX597X) += max597x-regulator.o
obj-$(CONFIG_REGULATOR_MAX77620) += max77620-regulator.o
obj-$(CONFIG_REGULATOR_MAX77650) += max77650-regulator.o
+obj-$(CONFIG_REGULATOR_MAX77658) += max77658-regulator.o
obj-$(CONFIG_REGULATOR_MAX8649) += max8649.o
obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o
obj-$(CONFIG_REGULATOR_MAX8893) += max8893.o
diff --git a/drivers/regulator/max77658-regulator.c b/drivers/regulator/max77658-regulator.c
new file mode 100644
index 000000000000..09ef72b979e4
--- /dev/null
+++ b/drivers/regulator/max77658-regulator.c
@@ -0,0 +1,171 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2023 Analog Devices, Inc.
+ * ADI regulator driver for the MAX77643/MAX77654/MAX77658/MAX77659
+ */
+
+#include <linux/mfd/max77658.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+
+#define MAX77658_LDO_VOLT_REG_MAX 0x7F
+#define MAX77658_LDO_VOLT_N_RANGE 0x80
+#define MAX77658_LDO_VOLT_STEP 25000
+#define MAX77658_LDO_VOLT_BASE 500000
+#define MAX77654_LDO_VOLT_BASE 800000
+
+#define MAX77658_REG_CNFG_LDO0_A 0x48
+#define MAX77658_REG_CNFG_LDO0_B 0x49
+
+#define MAX77654_REG_CNFG_LDO0_A 0x38
+#define MAX77654_REG_CNFG_LDO0_B 0x39
+
+#define MAX77658_REG_CNFG_LDO1_A 0x4A
+#define MAX77658_REG_CNFG_LDO1_B 0x4B
+
+#define MAX77654_REG_CNFG_LDO1_A 0x3A
+#define MAX77654_REG_CNFG_LDO1_B 0x3B
+
+#define MAX77658_BITS_CONFIG_LDOX_A_TV_LDO GENMASK(6, 0)
+#define MAX77658_BITS_CONFIG_LDOX_B_EN_LDO GENMASK(2, 0)
+
+#define MAX77658_REG_MAX 2
+
+/*
+ * 0.500 to 3.675V (25mV step)
+ */
+static const struct linear_range MAX77658_LDO_volts[] = {
+ REGULATOR_LINEAR_RANGE(MAX77658_LDO_VOLT_BASE, 0x00,
+ MAX77658_LDO_VOLT_REG_MAX,
+ MAX77658_LDO_VOLT_STEP),
+};
+
+static const struct linear_range MAX77654_LDO_volts[] = {
+ REGULATOR_LINEAR_RANGE(MAX77654_LDO_VOLT_BASE, 0x00,
+ MAX77658_LDO_VOLT_REG_MAX,
+ MAX77658_LDO_VOLT_STEP),
+};
+
+static const struct regulator_ops max77658_LDO_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,
+};
+
+#define REGULATOR_DESC_LDO(num, volts, vsel_r, vsel_m, enable_r, enable_m) { \
+ .name = "LDO"#num, \
+ .id = num, \
+ .of_match = of_match_ptr("LDO"#num), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .ops = &max77658_LDO_ops, \
+ .type = REGULATOR_VOLTAGE, \
+ .owner = THIS_MODULE, \
+ .linear_ranges = volts, \
+ .n_linear_ranges = MAX77658_LDO_VOLT_N_RANGE, \
+ .vsel_reg = vsel_r, \
+ .vsel_mask = vsel_m, \
+ .enable_reg = enable_r, \
+ .enable_mask = enable_m, \
+ .enable_val = 0x06, \
+ .disable_val = 0x04, \
+}
+
+static const struct regulator_desc max77643_ldo_desc[] = {
+ REGULATOR_DESC_LDO(0, MAX77658_LDO_volts, MAX77654_REG_CNFG_LDO0_A,
+ MAX77658_BITS_CONFIG_LDOX_A_TV_LDO,
+ MAX77654_REG_CNFG_LDO0_B,
+ MAX77658_BITS_CONFIG_LDOX_B_EN_LDO),
+};
+
+static const struct regulator_desc max77654_ldo_desc[] = {
+ REGULATOR_DESC_LDO(0, MAX77654_LDO_volts, MAX77654_REG_CNFG_LDO0_A,
+ MAX77658_BITS_CONFIG_LDOX_A_TV_LDO,
+ MAX77654_REG_CNFG_LDO0_B,
+ MAX77658_BITS_CONFIG_LDOX_B_EN_LDO),
+ REGULATOR_DESC_LDO(1, MAX77654_LDO_volts, MAX77654_REG_CNFG_LDO1_A,
+ MAX77658_BITS_CONFIG_LDOX_A_TV_LDO,
+ MAX77654_REG_CNFG_LDO1_B,
+ MAX77658_BITS_CONFIG_LDOX_B_EN_LDO),
+};
+
+static const struct regulator_desc max77658_ldo_desc[] = {
+ REGULATOR_DESC_LDO(0, MAX77658_LDO_volts, MAX77658_REG_CNFG_LDO0_A,
+ MAX77658_BITS_CONFIG_LDOX_A_TV_LDO,
+ MAX77658_REG_CNFG_LDO0_B,
+ MAX77658_BITS_CONFIG_LDOX_B_EN_LDO),
+ REGULATOR_DESC_LDO(1, MAX77658_LDO_volts, MAX77658_REG_CNFG_LDO1_A,
+ MAX77658_BITS_CONFIG_LDOX_A_TV_LDO,
+ MAX77658_REG_CNFG_LDO1_B,
+ MAX77658_BITS_CONFIG_LDOX_B_EN_LDO),
+};
+
+static int max77658_regulator_probe(struct platform_device *pdev)
+{
+ struct max77658_dev *max77658 = dev_get_drvdata(pdev->dev.parent);
+ const struct regulator_desc *regulators;
+ struct regulator_config config = {};
+ struct regulator_dev *rdev;
+ int n_regulators = 0;
+ int i;
+
+ switch (max77658->chip->id) {
+ case ID_MAX77643:
+ case ID_MAX77659:
+ regulators = max77643_ldo_desc;
+ n_regulators = ARRAY_SIZE(max77643_ldo_desc);
+ break;
+ case ID_MAX77654:
+ regulators = max77654_ldo_desc;
+ n_regulators = ARRAY_SIZE(max77654_ldo_desc);
+ break;
+ case ID_MAX77658:
+ regulators = max77658_ldo_desc;
+ n_regulators = ARRAY_SIZE(max77658_ldo_desc);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ config.dev = pdev->dev.parent;
+
+ for (i = 0; i < n_regulators; i++) {
+ rdev = devm_regulator_register(&pdev->dev, &regulators[i],
+ &config);
+ if (IS_ERR(rdev)) {
+ dev_err(&pdev->dev, "Failed to register %s regulator\n",
+ regulators[i].name);
+ return PTR_ERR(rdev);
+ }
+ }
+
+ return 0;
+}
+
+static const struct platform_device_id max77658_regulator_id[] = {
+ { "max77643-regulator" },
+ { "max77654-regulator" },
+ { "max77658-regulator" },
+ { "max77659-regulator" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, max77658_regulator_id);
+
+static struct platform_driver max77658_regulator_driver = {
+ .driver = {
+ .name = "max77658-regulator",
+ },
+ .probe = max77658_regulator_probe,
+ .id_table = max77658_regulator_id,
+};
+
+module_platform_driver(max77658_regulator_driver);
+
+MODULE_DESCRIPTION("MAX77658 Regulator Driver");
+MODULE_AUTHOR("Nurettin.Bolucu@xxxxxxxxxx, Zeynep.Arslanbenzer@xxxxxxxxxx");
+MODULE_LICENSE("GPL");
--
2.25.1