Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 459 insertions, 0 deletions

diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
new file mode 100644
index 000000000..23fa429eb
--- /dev/null
+++ b/drivers/regulator/da9052-regulator.c
@@ -0,0 +1,459 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// da9052-regulator.c: Regulator driver for DA9052
+//
+// Copyright(c) 2011 Dialog Semiconductor Ltd.
+//
+// Author: David Dajun Chen <dchen@diasemi.com>
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/of.h>
+#include <linux/regulator/of_regulator.h>
+
+#include <linux/mfd/da9052/da9052.h>
+#include <linux/mfd/da9052/reg.h>
+#include <linux/mfd/da9052/pdata.h>
+
+/* Buck step size */
+#define DA9052_BUCK_PERI_3uV_STEP		100000
+#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV	24
+#define DA9052_CONST_3uV			3000000
+
+#define DA9052_MIN_UA		0
+#define DA9052_MAX_UA		3
+#define DA9052_CURRENT_RANGE	4
+
+/* Bit masks */
+#define DA9052_BUCK_ILIM_MASK_EVEN	0x0c
+#define DA9052_BUCK_ILIM_MASK_ODD	0xc0
+
+/* DA9052 REGULATOR IDs */
+#define DA9052_ID_BUCK1		0
+#define DA9052_ID_BUCK2		1
+#define DA9052_ID_BUCK3		2
+#define DA9052_ID_BUCK4		3
+#define DA9052_ID_LDO1		4
+#define DA9052_ID_LDO2		5
+#define DA9052_ID_LDO3		6
+#define DA9052_ID_LDO4		7
+#define DA9052_ID_LDO5		8
+#define DA9052_ID_LDO6		9
+#define DA9052_ID_LDO7		10
+#define DA9052_ID_LDO8		11
+#define DA9052_ID_LDO9		12
+#define DA9052_ID_LDO10		13
+
+static const u32 da9052_current_limits[3][4] = {
+	{700000, 800000, 1000000, 1200000},	/* DA9052-BC BUCKs */
+	{1600000, 2000000, 2400000, 3000000},	/* DA9053-AA/Bx BUCK-CORE */
+	{800000, 1000000, 1200000, 1500000},	/* DA9053-AA/Bx BUCK-PRO,
+						 * BUCK-MEM and BUCK-PERI
+						*/
+};
+
+struct da9052_regulator_info {
+	struct regulator_desc reg_desc;
+	int step_uV;
+	int min_uV;
+	int max_uV;
+	unsigned char activate_bit;
+};
+
+struct da9052_regulator {
+	struct da9052 *da9052;
+	struct da9052_regulator_info *info;
+	struct regulator_dev *rdev;
+};
+
+static int verify_range(struct da9052_regulator_info *info,
+			 int min_uV, int max_uV)
+{
+	if (min_uV > info->max_uV || max_uV < info->min_uV)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
+{
+	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+	int offset = rdev_get_id(rdev);
+	int ret, row = 2;
+
+	ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
+	if (ret < 0)
+		return ret;
+
+	/* Determine the even or odd position of the buck current limit
+	 * register field
+	*/
+	if (offset % 2 == 0)
+		ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
+	else
+		ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;
+
+	/* Select the appropriate current limit range */
+	if (regulator->da9052->chip_id == DA9052)
+		row = 0;
+	else if (offset == 0)
+		row = 1;
+
+	return da9052_current_limits[row][ret];
+}
+
+static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
+					  int max_uA)
+{
+	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+	int offset = rdev_get_id(rdev);
+	int reg_val = 0;
+	int i, row = 2;
+
+	/* Select the appropriate current limit range */
+	if (regulator->da9052->chip_id == DA9052)
+		row = 0;
+	else if (offset == 0)
+		row = 1;
+
+	for (i = DA9052_CURRENT_RANGE - 1; i >= 0; i--) {
+		if ((min_uA <= da9052_current_limits[row][i]) &&
+		    (da9052_current_limits[row][i] <= max_uA)) {
+			reg_val = i;
+			break;
+		}
+	}
+
+	if (i < 0)
+		return -EINVAL;
+
+	/* Determine the even or odd position of the buck current limit
+	 * register field
+	*/
+	if (offset % 2 == 0)
+		return da9052_reg_update(regulator->da9052,
+					 DA9052_BUCKA_REG + offset/2,
+					 DA9052_BUCK_ILIM_MASK_EVEN,
+					 reg_val << 2);
+	else
+		return da9052_reg_update(regulator->da9052,
+					 DA9052_BUCKA_REG + offset/2,
+					 DA9052_BUCK_ILIM_MASK_ODD,
+					 reg_val << 6);
+}
+
+static int da9052_list_voltage(struct regulator_dev *rdev,
+				unsigned int selector)
+{
+	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9052_regulator_info *info = regulator->info;
+	int id = rdev_get_id(rdev);
+	int volt_uV;
+
+	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
+		&& (selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
+		volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
+			  + info->min_uV);
+		volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
+				    * (DA9052_BUCK_PERI_3uV_STEP);
+	} else {
+		volt_uV = (selector * info->step_uV) + info->min_uV;
+	}
+
+	if (volt_uV > info->max_uV)
+		return -EINVAL;
+
+	return volt_uV;
+}
+
+static int da9052_map_voltage(struct regulator_dev *rdev,
+			      int min_uV, int max_uV)
+{
+	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9052_regulator_info *info = regulator->info;
+	int id = rdev_get_id(rdev);
+	int ret, sel;
+
+	ret = verify_range(info, min_uV, max_uV);
+	if (ret < 0)
+		return ret;
+
+	if (min_uV < info->min_uV)
+		min_uV = info->min_uV;
+
+	if ((id == DA9052_ID_BUCK4) && (regulator->da9052->chip_id == DA9052)
+		&& (min_uV >= DA9052_CONST_3uV)) {
+			sel = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
+			      DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
+					   DA9052_BUCK_PERI_3uV_STEP);
+	} else {
+		sel = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
+	}
+
+	ret = da9052_list_voltage(rdev, sel);
+	if (ret < 0)
+		return ret;
+
+	return sel;
+}
+
+static int da9052_regulator_set_voltage_sel(struct regulator_dev *rdev,
+					    unsigned int selector)
+{
+	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9052_regulator_info *info = regulator->info;
+	int id = rdev_get_id(rdev);
+	int ret;
+
+	ret = da9052_reg_update(regulator->da9052, rdev->desc->vsel_reg,
+				rdev->desc->vsel_mask, selector);
+	if (ret < 0)
+		return ret;
+
+	/* Some LDOs and DCDCs are DVC controlled which requires enabling of
+	 * the activate bit to implment the changes on the output.
+	 */
+	switch (id) {
+	case DA9052_ID_BUCK1:
+	case DA9052_ID_BUCK2:
+	case DA9052_ID_BUCK3:
+	case DA9052_ID_LDO2:
+	case DA9052_ID_LDO3:
+		ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
+					info->activate_bit, info->activate_bit);
+		break;
+	}
+
+	return ret;
+}
+
+static int da9052_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
+						 unsigned int old_sel,
+						 unsigned int new_sel)
+{
+	struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+	struct da9052_regulator_info *info = regulator->info;
+	int id = rdev_get_id(rdev);
+	int ret = 0;
+
+	/* The DVC controlled LDOs and DCDCs ramp with 6.25mV/µs after enabling
+	 * the activate bit.
+	 */
+	switch (id) {
+	case DA9052_ID_BUCK1:
+	case DA9052_ID_BUCK2:
+	case DA9052_ID_BUCK3:
+	case DA9052_ID_LDO2:
+	case DA9052_ID_LDO3:
+		ret = DIV_ROUND_UP(abs(new_sel - old_sel) * info->step_uV,
+				   6250);
+		break;
+	}
+
+	return ret;
+}
+
+static const struct regulator_ops da9052_dcdc_ops = {
+	.get_current_limit = da9052_dcdc_get_current_limit,
+	.set_current_limit = da9052_dcdc_set_current_limit,
+
+	.list_voltage = da9052_list_voltage,
+	.map_voltage = da9052_map_voltage,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = da9052_regulator_set_voltage_sel,
+	.set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+};
+
+static const struct regulator_ops da9052_ldo_ops = {
+	.list_voltage = da9052_list_voltage,
+	.map_voltage = da9052_map_voltage,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = da9052_regulator_set_voltage_sel,
+	.set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+};
+
+#define DA9052_LDO(_id, _name, step, min, max, sbits, ebits, abits) \
+{\
+	.reg_desc = {\
+		.name = #_name,\
+		.of_match = of_match_ptr(#_name),\
+		.regulators_node = of_match_ptr("regulators"),\
+		.ops = &da9052_ldo_ops,\
+		.type = REGULATOR_VOLTAGE,\
+		.id = DA9052_ID_##_id,\
+		.n_voltages = (max - min) / step + 1, \
+		.owner = THIS_MODULE,\
+		.vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
+		.vsel_mask = (1 << (sbits)) - 1,\
+		.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
+		.enable_mask = 1 << (ebits),\
+	},\
+	.min_uV = (min) * 1000,\
+	.max_uV = (max) * 1000,\
+	.step_uV = (step) * 1000,\
+	.activate_bit = (abits),\
+}
+
+#define DA9052_DCDC(_id, _name, step, min, max, sbits, ebits, abits) \
+{\
+	.reg_desc = {\
+		.name = #_name,\
+		.of_match = of_match_ptr(#_name),\
+		.regulators_node = of_match_ptr("regulators"),\
+		.ops = &da9052_dcdc_ops,\
+		.type = REGULATOR_VOLTAGE,\
+		.id = DA9052_ID_##_id,\
+		.n_voltages = (max - min) / step + 1, \
+		.owner = THIS_MODULE,\
+		.vsel_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
+		.vsel_mask = (1 << (sbits)) - 1,\
+		.enable_reg = DA9052_BUCKCORE_REG + DA9052_ID_##_id, \
+		.enable_mask = 1 << (ebits),\
+	},\
+	.min_uV = (min) * 1000,\
+	.max_uV = (max) * 1000,\
+	.step_uV = (step) * 1000,\
+	.activate_bit = (abits),\
+}
+
+static struct da9052_regulator_info da9052_regulator_info[] = {
+	DA9052_DCDC(BUCK1, buck1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
+	DA9052_DCDC(BUCK2, buck2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
+	DA9052_DCDC(BUCK3, buck3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO),
+	DA9052_DCDC(BUCK4, buck4, 50, 1800, 3600, 5, 6, 0),
+	DA9052_LDO(LDO1, ldo1, 50, 600, 1800, 5, 6, 0),
+	DA9052_LDO(LDO2, ldo2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
+	DA9052_LDO(LDO3, ldo3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
+	DA9052_LDO(LDO4, ldo4, 25, 1725, 3300, 6, 6, 0),
+	DA9052_LDO(LDO5, ldo5, 50, 1200, 3600, 6, 6, 0),
+	DA9052_LDO(LDO6, ldo6, 50, 1200, 3600, 6, 6, 0),
+	DA9052_LDO(LDO7, ldo7, 50, 1200, 3600, 6, 6, 0),
+	DA9052_LDO(LDO8, ldo8, 50, 1200, 3600, 6, 6, 0),
+	DA9052_LDO(LDO9, ldo9, 50, 1250, 3650, 6, 6, 0),
+	DA9052_LDO(LDO10, ldo10, 50, 1200, 3600, 6, 6, 0),
+};
+
+static struct da9052_regulator_info da9053_regulator_info[] = {
+	DA9052_DCDC(BUCK1, buck1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
+	DA9052_DCDC(BUCK2, buck2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
+	DA9052_DCDC(BUCK3, buck3, 25, 950, 2525, 6, 6, DA9052_SUPPLY_VBMEMGO),
+	DA9052_DCDC(BUCK4, buck4, 25, 950, 2525, 6, 6, 0),
+	DA9052_LDO(LDO1, ldo1, 50, 600, 1800, 5, 6, 0),
+	DA9052_LDO(LDO2, ldo2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
+	DA9052_LDO(LDO3, ldo3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
+	DA9052_LDO(LDO4, ldo4, 25, 1725, 3300, 6, 6, 0),
+	DA9052_LDO(LDO5, ldo5, 50, 1200, 3600, 6, 6, 0),
+	DA9052_LDO(LDO6, ldo6, 50, 1200, 3600, 6, 6, 0),
+	DA9052_LDO(LDO7, ldo7, 50, 1200, 3600, 6, 6, 0),
+	DA9052_LDO(LDO8, ldo8, 50, 1200, 3600, 6, 6, 0),
+	DA9052_LDO(LDO9, ldo9, 50, 1250, 3650, 6, 6, 0),
+	DA9052_LDO(LDO10, ldo10, 50, 1200, 3600, 6, 6, 0),
+};
+
+static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
+								 int id)
+{
+	struct da9052_regulator_info *info;
+	int i;
+
+	switch (chip_id) {
+	case DA9052:
+		for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
+			info = &da9052_regulator_info[i];
+			if (info->reg_desc.id == id)
+				return info;
+		}
+		break;
+	case DA9053_AA:
+	case DA9053_BA:
+	case DA9053_BB:
+	case DA9053_BC:
+		for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
+			info = &da9053_regulator_info[i];
+			if (info->reg_desc.id == id)
+				return info;
+		}
+		break;
+	}
+
+	return NULL;
+}
+
+static int da9052_regulator_probe(struct platform_device *pdev)
+{
+	const struct mfd_cell *cell = mfd_get_cell(pdev);
+	struct regulator_config config = { };
+	struct da9052_regulator *regulator;
+	struct da9052 *da9052;
+	struct da9052_pdata *pdata;
+
+	regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
+				 GFP_KERNEL);
+	if (!regulator)
+		return -ENOMEM;
+
+	da9052 = dev_get_drvdata(pdev->dev.parent);
+	pdata = dev_get_platdata(da9052->dev);
+	regulator->da9052 = da9052;
+
+	regulator->info = find_regulator_info(regulator->da9052->chip_id,
+					      cell->id);
+	if (regulator->info == NULL) {
+		dev_err(&pdev->dev, "invalid regulator ID specified\n");
+		return -EINVAL;
+	}
+
+	config.dev = da9052->dev;
+	config.driver_data = regulator;
+	config.regmap = da9052->regmap;
+	if (pdata)
+		config.init_data = pdata->regulators[cell->id];
+
+	regulator->rdev = devm_regulator_register(&pdev->dev,
+						  &regulator->info->reg_desc,
+						  &config);
+	if (IS_ERR(regulator->rdev)) {
+		dev_err(&pdev->dev, "failed to register regulator %s\n",
+			regulator->info->reg_desc.name);
+		return PTR_ERR(regulator->rdev);
+	}
+
+	platform_set_drvdata(pdev, regulator);
+
+	return 0;
+}
+
+static struct platform_driver da9052_regulator_driver = {
+	.probe = da9052_regulator_probe,
+	.driver = {
+		.name = "da9052-regulator",
+	},
+};
+
+static int __init da9052_regulator_init(void)
+{
+	return platform_driver_register(&da9052_regulator_driver);
+}
+subsys_initcall(da9052_regulator_init);
+
+static void __exit da9052_regulator_exit(void)
+{
+	platform_driver_unregister(&da9052_regulator_driver);
+}
+module_exit(da9052_regulator_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:da9052-regulator");