Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 538 insertions, 0 deletions

diff --git a/drivers/regulator/max77686-regulator.c b/drivers/regulator/max77686-regulator.c
new file mode 100644
index 0000000000..c7b270fd9e
--- /dev/null
+++ b/drivers/regulator/max77686-regulator.c
@@ -0,0 +1,538 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// max77686.c - Regulator driver for the Maxim 77686
+//
+// Copyright (C) 2012 Samsung Electronics
+// Chiwoong Byun <woong.byun@samsung.com>
+// Jonghwa Lee <jonghwa3.lee@samsung.com>
+//
+// This driver is based on max8997.c
+
+#include <linux/kernel.h>
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/mfd/max77686.h>
+#include <linux/mfd/max77686-private.h>
+
+#define MAX77686_LDO_MINUV	800000
+#define MAX77686_LDO_UVSTEP	50000
+#define MAX77686_LDO_LOW_MINUV	800000
+#define MAX77686_LDO_LOW_UVSTEP	25000
+#define MAX77686_BUCK_MINUV	750000
+#define MAX77686_BUCK_UVSTEP	50000
+#define MAX77686_BUCK_ENABLE_TIME	40		/* us */
+#define MAX77686_DVS_ENABLE_TIME	22		/* us */
+#define MAX77686_RAMP_DELAY	100000			/* uV/us */
+#define MAX77686_DVS_RAMP_DELAY	27500			/* uV/us */
+#define MAX77686_DVS_MINUV	600000
+#define MAX77686_DVS_UVSTEP	12500
+
+/*
+ * Value for configuring buck[89] and LDO{20,21,22} as GPIO control.
+ * It is the same as 'off' for other regulators.
+ */
+#define MAX77686_GPIO_CONTROL		0x0
+/*
+ * Values used for configuring LDOs and bucks.
+ * Forcing low power mode: LDO1, 3-5, 9, 13, 17-26
+ */
+#define MAX77686_LDO_LOWPOWER		0x1
+/*
+ * On/off controlled by PWRREQ:
+ *  - LDO2, 6-8, 10-12, 14-16
+ *  - buck[1234]
+ */
+#define MAX77686_OFF_PWRREQ		0x1
+/* Low power mode controlled by PWRREQ: All LDOs */
+#define MAX77686_LDO_LOWPOWER_PWRREQ	0x2
+/* Forcing low power mode: buck[234] */
+#define MAX77686_BUCK_LOWPOWER		0x2
+#define MAX77686_NORMAL			0x3
+
+#define MAX77686_OPMODE_SHIFT	6
+#define MAX77686_OPMODE_BUCK234_SHIFT	4
+#define MAX77686_OPMODE_MASK	0x3
+
+#define MAX77686_VSEL_MASK	0x3F
+#define MAX77686_DVS_VSEL_MASK	0xFF
+
+#define MAX77686_RAMP_RATE_MASK	0xC0
+
+#define MAX77686_REGULATORS	MAX77686_REG_MAX
+#define MAX77686_LDOS		26
+
+struct max77686_data {
+	struct device *dev;
+	DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
+
+	/* Array indexed by regulator id */
+	unsigned int opmode[MAX77686_REGULATORS];
+};
+
+static unsigned int max77686_get_opmode_shift(int id)
+{
+	switch (id) {
+	case MAX77686_BUCK1:
+	case MAX77686_BUCK5 ... MAX77686_BUCK9:
+		return 0;
+	case MAX77686_BUCK2 ... MAX77686_BUCK4:
+		return MAX77686_OPMODE_BUCK234_SHIFT;
+	default:
+		/* all LDOs */
+		return MAX77686_OPMODE_SHIFT;
+	}
+}
+
+/*
+ * When regulator is configured for GPIO control then it
+ * replaces "normal" mode. Any change from low power mode to normal
+ * should actually change to GPIO control.
+ * Map normal mode to proper value for such regulators.
+ */
+static unsigned int max77686_map_normal_mode(struct max77686_data *max77686,
+					     int id)
+{
+	switch (id) {
+	case MAX77686_BUCK8:
+	case MAX77686_BUCK9:
+	case MAX77686_LDO20 ... MAX77686_LDO22:
+		if (test_bit(id, max77686->gpio_enabled))
+			return MAX77686_GPIO_CONTROL;
+	}
+
+	return MAX77686_NORMAL;
+}
+
+/* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
+static int max77686_set_suspend_disable(struct regulator_dev *rdev)
+{
+	unsigned int val, shift;
+	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
+	int ret, id = rdev_get_id(rdev);
+
+	shift = max77686_get_opmode_shift(id);
+	val = MAX77686_OFF_PWRREQ;
+
+	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+				 rdev->desc->enable_mask, val << shift);
+	if (ret)
+		return ret;
+
+	max77686->opmode[id] = val;
+	return 0;
+}
+
+/* Some LDOs supports [LPM/Normal]ON mode during suspend state */
+static int max77686_set_suspend_mode(struct regulator_dev *rdev,
+				     unsigned int mode)
+{
+	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
+	unsigned int val;
+	int ret, id = rdev_get_id(rdev);
+
+	/* BUCK[5-9] doesn't support this feature */
+	if (id >= MAX77686_BUCK5)
+		return 0;
+
+	switch (mode) {
+	case REGULATOR_MODE_IDLE:			/* ON in LP Mode */
+		val = MAX77686_LDO_LOWPOWER_PWRREQ;
+		break;
+	case REGULATOR_MODE_NORMAL:			/* ON in Normal Mode */
+		val = max77686_map_normal_mode(max77686, id);
+		break;
+	default:
+		pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
+			rdev->desc->name, mode);
+		return -EINVAL;
+	}
+
+	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+				  rdev->desc->enable_mask,
+				  val << MAX77686_OPMODE_SHIFT);
+	if (ret)
+		return ret;
+
+	max77686->opmode[id] = val;
+	return 0;
+}
+
+/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
+static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
+				     unsigned int mode)
+{
+	unsigned int val;
+	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
+	int ret, id = rdev_get_id(rdev);
+
+	switch (mode) {
+	case REGULATOR_MODE_STANDBY:			/* switch off */
+		val = MAX77686_OFF_PWRREQ;
+		break;
+	case REGULATOR_MODE_IDLE:			/* ON in LP Mode */
+		val = MAX77686_LDO_LOWPOWER_PWRREQ;
+		break;
+	case REGULATOR_MODE_NORMAL:			/* ON in Normal Mode */
+		val = max77686_map_normal_mode(max77686, id);
+		break;
+	default:
+		pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n",
+			rdev->desc->name, mode);
+		return -EINVAL;
+	}
+
+	ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+				 rdev->desc->enable_mask,
+				 val << MAX77686_OPMODE_SHIFT);
+	if (ret)
+		return ret;
+
+	max77686->opmode[id] = val;
+	return 0;
+}
+
+static int max77686_enable(struct regulator_dev *rdev)
+{
+	struct max77686_data *max77686 = rdev_get_drvdata(rdev);
+	unsigned int shift;
+	int id = rdev_get_id(rdev);
+
+	shift = max77686_get_opmode_shift(id);
+
+	if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
+		max77686->opmode[id] = max77686_map_normal_mode(max77686, id);
+
+	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+				  rdev->desc->enable_mask,
+				  max77686->opmode[id] << shift);
+}
+
+static int max77686_of_parse_cb(struct device_node *np,
+		const struct regulator_desc *desc,
+		struct regulator_config *config)
+{
+	struct max77686_data *max77686 = config->driver_data;
+	int ret;
+
+	switch (desc->id) {
+	case MAX77686_BUCK8:
+	case MAX77686_BUCK9:
+	case MAX77686_LDO20 ... MAX77686_LDO22:
+		config->ena_gpiod = fwnode_gpiod_get_index(
+				of_fwnode_handle(np),
+				"maxim,ena",
+				0,
+				GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
+				"max77686-regulator");
+		if (IS_ERR(config->ena_gpiod))
+			config->ena_gpiod = NULL;
+		break;
+	default:
+		return 0;
+	}
+
+	if (config->ena_gpiod) {
+		set_bit(desc->id, max77686->gpio_enabled);
+
+		ret = regmap_update_bits(config->regmap, desc->enable_reg,
+					 desc->enable_mask,
+					 MAX77686_GPIO_CONTROL);
+		if (ret) {
+			gpiod_put(config->ena_gpiod);
+			config->ena_gpiod = NULL;
+		}
+	}
+
+	return 0;
+}
+
+static const unsigned int max77686_buck_dvs_ramp_table[] = {
+	13750, 27500, 55000, 100000
+};
+
+static const struct regulator_ops max77686_ops = {
+	.list_voltage		= regulator_list_voltage_linear,
+	.map_voltage		= regulator_map_voltage_linear,
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= max77686_enable,
+	.disable		= regulator_disable_regmap,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
+	.set_suspend_mode	= max77686_set_suspend_mode,
+};
+
+static const struct regulator_ops max77686_ldo_ops = {
+	.list_voltage		= regulator_list_voltage_linear,
+	.map_voltage		= regulator_map_voltage_linear,
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= max77686_enable,
+	.disable		= regulator_disable_regmap,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
+	.set_suspend_mode	= max77686_ldo_set_suspend_mode,
+	.set_suspend_disable	= max77686_set_suspend_disable,
+};
+
+static const struct regulator_ops max77686_buck1_ops = {
+	.list_voltage		= regulator_list_voltage_linear,
+	.map_voltage		= regulator_map_voltage_linear,
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= max77686_enable,
+	.disable		= regulator_disable_regmap,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
+	.set_suspend_disable	= max77686_set_suspend_disable,
+};
+
+static const struct regulator_ops max77686_buck_dvs_ops = {
+	.list_voltage		= regulator_list_voltage_linear,
+	.map_voltage		= regulator_map_voltage_linear,
+	.is_enabled		= regulator_is_enabled_regmap,
+	.enable			= max77686_enable,
+	.disable		= regulator_disable_regmap,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
+	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
+	.set_ramp_delay		= regulator_set_ramp_delay_regmap,
+	.set_suspend_disable	= max77686_set_suspend_disable,
+};
+
+#define regulator_desc_ldo(num)		{				\
+	.name		= "LDO"#num,					\
+	.of_match	= of_match_ptr("LDO"#num),			\
+	.regulators_node	= of_match_ptr("voltage-regulators"),	\
+	.of_parse_cb	= max77686_of_parse_cb,				\
+	.id		= MAX77686_LDO##num,				\
+	.ops		= &max77686_ops,				\
+	.type		= REGULATOR_VOLTAGE,				\
+	.owner		= THIS_MODULE,					\
+	.min_uV		= MAX77686_LDO_MINUV,				\
+	.uV_step	= MAX77686_LDO_UVSTEP,				\
+	.ramp_delay	= MAX77686_RAMP_DELAY,				\
+	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
+	.vsel_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
+	.vsel_mask	= MAX77686_VSEL_MASK,				\
+	.enable_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
+	.enable_mask	= MAX77686_OPMODE_MASK				\
+			<< MAX77686_OPMODE_SHIFT,			\
+}
+#define regulator_desc_lpm_ldo(num)	{				\
+	.name		= "LDO"#num,					\
+	.of_match	= of_match_ptr("LDO"#num),			\
+	.regulators_node	= of_match_ptr("voltage-regulators"),	\
+	.id		= MAX77686_LDO##num,				\
+	.ops		= &max77686_ldo_ops,				\
+	.type		= REGULATOR_VOLTAGE,				\
+	.owner		= THIS_MODULE,					\
+	.min_uV		= MAX77686_LDO_MINUV,				\
+	.uV_step	= MAX77686_LDO_UVSTEP,				\
+	.ramp_delay	= MAX77686_RAMP_DELAY,				\
+	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
+	.vsel_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
+	.vsel_mask	= MAX77686_VSEL_MASK,				\
+	.enable_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
+	.enable_mask	= MAX77686_OPMODE_MASK				\
+			<< MAX77686_OPMODE_SHIFT,			\
+}
+#define regulator_desc_ldo_low(num)		{			\
+	.name		= "LDO"#num,					\
+	.of_match	= of_match_ptr("LDO"#num),			\
+	.regulators_node	= of_match_ptr("voltage-regulators"),	\
+	.id		= MAX77686_LDO##num,				\
+	.ops		= &max77686_ldo_ops,				\
+	.type		= REGULATOR_VOLTAGE,				\
+	.owner		= THIS_MODULE,					\
+	.min_uV		= MAX77686_LDO_LOW_MINUV,			\
+	.uV_step	= MAX77686_LDO_LOW_UVSTEP,			\
+	.ramp_delay	= MAX77686_RAMP_DELAY,				\
+	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
+	.vsel_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
+	.vsel_mask	= MAX77686_VSEL_MASK,				\
+	.enable_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
+	.enable_mask	= MAX77686_OPMODE_MASK				\
+			<< MAX77686_OPMODE_SHIFT,			\
+}
+#define regulator_desc_ldo1_low(num)		{			\
+	.name		= "LDO"#num,					\
+	.of_match	= of_match_ptr("LDO"#num),			\
+	.regulators_node	= of_match_ptr("voltage-regulators"),	\
+	.id		= MAX77686_LDO##num,				\
+	.ops		= &max77686_ops,				\
+	.type		= REGULATOR_VOLTAGE,				\
+	.owner		= THIS_MODULE,					\
+	.min_uV		= MAX77686_LDO_LOW_MINUV,			\
+	.uV_step	= MAX77686_LDO_LOW_UVSTEP,			\
+	.ramp_delay	= MAX77686_RAMP_DELAY,				\
+	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
+	.vsel_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
+	.vsel_mask	= MAX77686_VSEL_MASK,				\
+	.enable_reg	= MAX77686_REG_LDO1CTRL1 + num - 1,		\
+	.enable_mask	= MAX77686_OPMODE_MASK				\
+			<< MAX77686_OPMODE_SHIFT,			\
+}
+#define regulator_desc_buck(num)		{			\
+	.name		= "BUCK"#num,					\
+	.of_match	= of_match_ptr("BUCK"#num),			\
+	.regulators_node	= of_match_ptr("voltage-regulators"),	\
+	.of_parse_cb	= max77686_of_parse_cb,				\
+	.id		= MAX77686_BUCK##num,				\
+	.ops		= &max77686_ops,				\
+	.type		= REGULATOR_VOLTAGE,				\
+	.owner		= THIS_MODULE,					\
+	.min_uV		= MAX77686_BUCK_MINUV,				\
+	.uV_step	= MAX77686_BUCK_UVSTEP,				\
+	.ramp_delay	= MAX77686_RAMP_DELAY,				\
+	.enable_time	= MAX77686_BUCK_ENABLE_TIME,			\
+	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
+	.vsel_reg	= MAX77686_REG_BUCK5OUT + (num - 5) * 2,	\
+	.vsel_mask	= MAX77686_VSEL_MASK,				\
+	.enable_reg	= MAX77686_REG_BUCK5CTRL + (num - 5) * 2,	\
+	.enable_mask	= MAX77686_OPMODE_MASK,				\
+}
+#define regulator_desc_buck1(num)		{			\
+	.name		= "BUCK"#num,					\
+	.of_match	= of_match_ptr("BUCK"#num),			\
+	.regulators_node	= of_match_ptr("voltage-regulators"),	\
+	.id		= MAX77686_BUCK##num,				\
+	.ops		= &max77686_buck1_ops,				\
+	.type		= REGULATOR_VOLTAGE,				\
+	.owner		= THIS_MODULE,					\
+	.min_uV		= MAX77686_BUCK_MINUV,				\
+	.uV_step	= MAX77686_BUCK_UVSTEP,				\
+	.ramp_delay	= MAX77686_RAMP_DELAY,				\
+	.enable_time	= MAX77686_BUCK_ENABLE_TIME,			\
+	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
+	.vsel_reg	= MAX77686_REG_BUCK1OUT,			\
+	.vsel_mask	= MAX77686_VSEL_MASK,				\
+	.enable_reg	= MAX77686_REG_BUCK1CTRL,			\
+	.enable_mask	= MAX77686_OPMODE_MASK,				\
+}
+#define regulator_desc_buck_dvs(num)		{			\
+	.name		= "BUCK"#num,					\
+	.of_match	= of_match_ptr("BUCK"#num),			\
+	.regulators_node	= of_match_ptr("voltage-regulators"),	\
+	.id		= MAX77686_BUCK##num,				\
+	.ops		= &max77686_buck_dvs_ops,			\
+	.type		= REGULATOR_VOLTAGE,				\
+	.owner		= THIS_MODULE,					\
+	.min_uV		= MAX77686_DVS_MINUV,				\
+	.uV_step	= MAX77686_DVS_UVSTEP,				\
+	.ramp_delay	= MAX77686_DVS_RAMP_DELAY,			\
+	.enable_time	= MAX77686_DVS_ENABLE_TIME,			\
+	.n_voltages	= MAX77686_DVS_VSEL_MASK + 1,			\
+	.vsel_reg	= MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,	\
+	.vsel_mask	= MAX77686_DVS_VSEL_MASK,			\
+	.enable_reg	= MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,	\
+	.enable_mask	= MAX77686_OPMODE_MASK				\
+			<< MAX77686_OPMODE_BUCK234_SHIFT,		\
+	.ramp_reg	= MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10,	\
+	.ramp_mask	= MAX77686_RAMP_RATE_MASK,			\
+	.ramp_delay_table = max77686_buck_dvs_ramp_table,		\
+	.n_ramp_values	= ARRAY_SIZE(max77686_buck_dvs_ramp_table),	\
+}
+
+static const struct regulator_desc regulators[] = {
+	regulator_desc_ldo1_low(1),
+	regulator_desc_ldo_low(2),
+	regulator_desc_ldo(3),
+	regulator_desc_ldo(4),
+	regulator_desc_ldo(5),
+	regulator_desc_ldo_low(6),
+	regulator_desc_ldo_low(7),
+	regulator_desc_ldo_low(8),
+	regulator_desc_ldo(9),
+	regulator_desc_lpm_ldo(10),
+	regulator_desc_lpm_ldo(11),
+	regulator_desc_lpm_ldo(12),
+	regulator_desc_ldo(13),
+	regulator_desc_lpm_ldo(14),
+	regulator_desc_ldo_low(15),
+	regulator_desc_lpm_ldo(16),
+	regulator_desc_ldo(17),
+	regulator_desc_ldo(18),
+	regulator_desc_ldo(19),
+	regulator_desc_ldo(20),
+	regulator_desc_ldo(21),
+	regulator_desc_ldo(22),
+	regulator_desc_ldo(23),
+	regulator_desc_ldo(24),
+	regulator_desc_ldo(25),
+	regulator_desc_ldo(26),
+	regulator_desc_buck1(1),
+	regulator_desc_buck_dvs(2),
+	regulator_desc_buck_dvs(3),
+	regulator_desc_buck_dvs(4),
+	regulator_desc_buck(5),
+	regulator_desc_buck(6),
+	regulator_desc_buck(7),
+	regulator_desc_buck(8),
+	regulator_desc_buck(9),
+};
+
+static int max77686_pmic_probe(struct platform_device *pdev)
+{
+	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
+	struct max77686_data *max77686;
+	int i;
+	struct regulator_config config = { };
+
+	dev_dbg(&pdev->dev, "%s\n", __func__);
+
+	max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
+				GFP_KERNEL);
+	if (!max77686)
+		return -ENOMEM;
+
+	max77686->dev = &pdev->dev;
+	config.dev = iodev->dev;
+	config.regmap = iodev->regmap;
+	config.driver_data = max77686;
+	platform_set_drvdata(pdev, max77686);
+
+	for (i = 0; i < MAX77686_REGULATORS; i++) {
+		struct regulator_dev *rdev;
+		int id = regulators[i].id;
+
+		max77686->opmode[id] = MAX77686_NORMAL;
+		rdev = devm_regulator_register(&pdev->dev,
+						&regulators[i], &config);
+		if (IS_ERR(rdev)) {
+			int ret = PTR_ERR(rdev);
+			dev_err(&pdev->dev,
+				"regulator init failed for %d: %d\n", i, ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static const struct platform_device_id max77686_pmic_id[] = {
+	{"max77686-pmic", 0},
+	{ },
+};
+MODULE_DEVICE_TABLE(platform, max77686_pmic_id);
+
+static struct platform_driver max77686_pmic_driver = {
+	.driver = {
+		.name = "max77686-pmic",
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+	},
+	.probe = max77686_pmic_probe,
+	.id_table = max77686_pmic_id,
+};
+
+module_platform_driver(max77686_pmic_driver);
+
+MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
+MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
+MODULE_LICENSE("GPL");