Merge branch 'for-mfd-next' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git

3 files changed, 206 insertions, 0 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index d333be2bea3b..17982e1cbf4d 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -1027,6 +1027,13 @@ config REGULATOR_PWM
 	  This driver supports PWM controlled voltage regulators. PWM
 	  duty cycle can increase or decrease the voltage.
 
+config REGULATOR_QCOM_PM8008
+	tristate "Qualcomm PM8008 PMIC regulators"
+	depends on MFD_QCOM_PM8008
+	help
+	  Select this option to enable support for the voltage regulators in
+	  Qualcomm PM8008 PMICs.
+
 config REGULATOR_QCOM_REFGEN
 	tristate "Qualcomm REFGEN regulator driver"
 	depends on ARCH_QCOM || COMPILE_TEST
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index ba15fa5f30ad..ca4d09c60867 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -112,6 +112,7 @@ obj-$(CONFIG_REGULATOR_MT6380)	+= mt6380-regulator.o
 obj-$(CONFIG_REGULATOR_MT6397)	+= mt6397-regulator.o
 obj-$(CONFIG_REGULATOR_MTK_DVFSRC) += mtk-dvfsrc-regulator.o
 obj-$(CONFIG_REGULATOR_QCOM_LABIBB) += qcom-labibb-regulator.o
+obj-$(CONFIG_REGULATOR_QCOM_PM8008) += qcom-pm8008-regulator.o
 obj-$(CONFIG_REGULATOR_QCOM_REFGEN) += qcom-refgen-regulator.o
 obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o
 obj-$(CONFIG_REGULATOR_QCOM_RPMH) += qcom-rpmh-regulator.o
diff --git a/drivers/regulator/qcom-pm8008-regulator.c b/drivers/regulator/qcom-pm8008-regulator.c
new file mode 100644
index 000000000000..da017c1969d0
--- /dev/null
+++ b/drivers/regulator/qcom-pm8008-regulator.c
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2019-2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2024 Linaro Limited
+ */
+
+#include <linux/array_size.h>
+#include <linux/bits.h>
+#include <linux/device.h>
+#include <linux/math.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+
+#include <asm/byteorder.h>
+
+#define DEFAULT_VOLTAGE_STEPPER_RATE	38400
+
+#define LDO_STEPPER_CTL_REG		0x3b
+#define STEP_RATE_MASK			GENMASK(1, 0)
+
+#define LDO_VSET_LB_REG			0x40
+
+#define LDO_ENABLE_REG			0x46
+#define ENABLE_BIT			BIT(7)
+
+struct pm8008_regulator {
+	struct regmap		*regmap;
+	struct regulator_desc	desc;
+	unsigned int		base;
+};
+
+struct pm8008_regulator_data {
+	const char			*name;
+	const char			*supply_name;
+	unsigned int			base;
+	int				min_dropout_uV;
+	const struct linear_range	*voltage_range;
+};
+
+static const struct linear_range nldo_ranges[] = {
+	REGULATOR_LINEAR_RANGE(528000, 0, 122, 8000),
+};
+
+static const struct linear_range pldo_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1504000, 0, 237, 8000),
+};
+
+static const struct pm8008_regulator_data pm8008_reg_data[] = {
+	{ "ldo1", "vdd-l1-l2", 0x4000, 225000, nldo_ranges, },
+	{ "ldo2", "vdd-l1-l2", 0x4100, 225000, nldo_ranges, },
+	{ "ldo3", "vdd-l3-l4", 0x4200, 300000, pldo_ranges, },
+	{ "ldo4", "vdd-l3-l4", 0x4300, 300000, pldo_ranges, },
+	{ "ldo5", "vdd-l5",    0x4400, 200000, pldo_ranges, },
+	{ "ldo6", "vdd-l6",    0x4500, 200000, pldo_ranges, },
+	{ "ldo7", "vdd-l7",    0x4600, 200000, pldo_ranges, },
+};
+
+static int pm8008_regulator_set_voltage_sel(struct regulator_dev *rdev, unsigned int sel)
+{
+	struct pm8008_regulator *preg = rdev_get_drvdata(rdev);
+	unsigned int mV;
+	__le16 val;
+	int ret;
+
+	ret = regulator_list_voltage_linear_range(rdev, sel);
+	if (ret < 0)
+		return ret;
+
+	mV = DIV_ROUND_UP(ret, 1000);
+
+	val = cpu_to_le16(mV);
+
+	ret = regmap_bulk_write(preg->regmap, preg->base + LDO_VSET_LB_REG,
+			&val, sizeof(val));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int pm8008_regulator_get_voltage_sel(struct regulator_dev *rdev)
+{
+	struct pm8008_regulator *preg = rdev_get_drvdata(rdev);
+	unsigned int uV;
+	__le16 val;
+	int ret;
+
+	ret = regmap_bulk_read(preg->regmap, preg->base + LDO_VSET_LB_REG,
+			&val, sizeof(val));
+	if (ret < 0)
+		return ret;
+
+	uV = le16_to_cpu(val) * 1000;
+
+	return (uV - preg->desc.min_uV) / preg->desc.uV_step;
+}
+
+static const struct regulator_ops pm8008_regulator_ops = {
+	.list_voltage		= regulator_list_voltage_linear,
+	.set_voltage_sel	= pm8008_regulator_set_voltage_sel,
+	.get_voltage_sel	= pm8008_regulator_get_voltage_sel,
+	.enable			= regulator_enable_regmap,
+	.disable		= regulator_disable_regmap,
+	.is_enabled		= regulator_is_enabled_regmap,
+};
+
+static int pm8008_regulator_probe(struct platform_device *pdev)
+{
+	const struct pm8008_regulator_data *data;
+	struct regulator_config config = {};
+	struct device *dev = &pdev->dev;
+	struct pm8008_regulator *preg;
+	struct regulator_desc *desc;
+	struct regulator_dev *rdev;
+	struct regmap *regmap;
+	unsigned int val;
+	int ret, i;
+
+	regmap = dev_get_regmap(dev->parent, "secondary");
+	if (!regmap)
+		return -EINVAL;
+
+	for (i = 0; i < ARRAY_SIZE(pm8008_reg_data); i++) {
+		data = &pm8008_reg_data[i];
+
+		preg = devm_kzalloc(dev, sizeof(*preg), GFP_KERNEL);
+		if (!preg)
+			return -ENOMEM;
+
+		preg->regmap = regmap;
+		preg->base = data->base;
+
+		desc = &preg->desc;
+
+		desc->name = data->name;
+		desc->supply_name = data->supply_name;
+		desc->of_match = data->name;
+		desc->regulators_node = of_match_ptr("regulators");
+		desc->ops = &pm8008_regulator_ops;
+		desc->type = REGULATOR_VOLTAGE;
+		desc->owner = THIS_MODULE;
+
+		desc->linear_ranges = data->voltage_range;
+		desc->n_linear_ranges = 1;
+		desc->uV_step = desc->linear_ranges[0].step;
+		desc->min_uV = desc->linear_ranges[0].min;
+		desc->n_voltages = linear_range_values_in_range(&desc->linear_ranges[0]);
+
+		ret = regmap_read(regmap, preg->base + LDO_STEPPER_CTL_REG, &val);
+		if (ret < 0) {
+			dev_err(dev, "failed to read step rate: %d\n", ret);
+			return ret;
+		}
+		val &= STEP_RATE_MASK;
+		desc->ramp_delay = DEFAULT_VOLTAGE_STEPPER_RATE >> val;
+
+		desc->min_dropout_uV = data->min_dropout_uV;
+
+		desc->enable_reg = preg->base + LDO_ENABLE_REG;
+		desc->enable_mask = ENABLE_BIT;
+
+		config.dev = dev->parent;
+		config.driver_data = preg;
+		config.regmap = regmap;
+
+		rdev = devm_regulator_register(dev, desc, &config);
+		if (IS_ERR(rdev)) {
+			ret = PTR_ERR(rdev);
+			dev_err(dev, "failed to register regulator %s: %d\n",
+					desc->name, ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static const struct platform_device_id pm8008_regulator_id_table[] = {
+	{ "pm8008-regulator" },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, pm8008_regulator_id_table);
+
+static struct platform_driver pm8008_regulator_driver = {
+	.driver	= {
+		.name = "qcom-pm8008-regulator",
+	},
+	.probe = pm8008_regulator_probe,
+	.id_table = pm8008_regulator_id_table,
+};
+module_platform_driver(pm8008_regulator_driver);
+
+MODULE_DESCRIPTION("Qualcomm PM8008 PMIC regulator driver");
+MODULE_LICENSE("GPL");