Adding upstream version 6.6.15.upstream/6.6.15

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

1 files changed, 286 insertions, 0 deletions

diff --git a/drivers/regulator/lochnagar-regulator.c b/drivers/regulator/lochnagar-regulator.c
new file mode 100644
index 0000000000..11b358efbc
--- /dev/null
+++ b/drivers/regulator/lochnagar-regulator.c
@@ -0,0 +1,286 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Lochnagar regulator driver
+//
+// Copyright (c) 2017-2018 Cirrus Logic, Inc. and
+//                         Cirrus Logic International Semiconductor Ltd.
+//
+// Author: Charles Keepax <ckeepax@opensource.cirrus.com>
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+
+#include <linux/mfd/lochnagar.h>
+#include <linux/mfd/lochnagar1_regs.h>
+#include <linux/mfd/lochnagar2_regs.h>
+
+static const struct regulator_ops lochnagar_micvdd_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+
+	.list_voltage = regulator_list_voltage_linear_range,
+	.map_voltage = regulator_map_voltage_linear_range,
+
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+};
+
+static const struct linear_range lochnagar_micvdd_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1000000, 0,    0xC, 50000),
+	REGULATOR_LINEAR_RANGE(1700000, 0xD, 0x1F, 100000),
+};
+
+static int lochnagar_micbias_enable(struct regulator_dev *rdev)
+{
+	struct lochnagar *lochnagar = rdev_get_drvdata(rdev);
+	int ret;
+
+	mutex_lock(&lochnagar->analogue_config_lock);
+
+	ret = regulator_enable_regmap(rdev);
+	if (ret < 0)
+		goto err;
+
+	ret = lochnagar_update_config(lochnagar);
+
+err:
+	mutex_unlock(&lochnagar->analogue_config_lock);
+
+	return ret;
+}
+
+static int lochnagar_micbias_disable(struct regulator_dev *rdev)
+{
+	struct lochnagar *lochnagar = rdev_get_drvdata(rdev);
+	int ret;
+
+	mutex_lock(&lochnagar->analogue_config_lock);
+
+	ret = regulator_disable_regmap(rdev);
+	if (ret < 0)
+		goto err;
+
+	ret = lochnagar_update_config(lochnagar);
+
+err:
+	mutex_unlock(&lochnagar->analogue_config_lock);
+
+	return ret;
+}
+
+static const struct regulator_ops lochnagar_micbias_ops = {
+	.enable = lochnagar_micbias_enable,
+	.disable = lochnagar_micbias_disable,
+	.is_enabled = regulator_is_enabled_regmap,
+};
+
+static const struct regulator_ops lochnagar_vddcore_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+
+	.list_voltage = regulator_list_voltage_linear_range,
+	.map_voltage = regulator_map_voltage_linear_range,
+
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+};
+
+static const struct linear_range lochnagar_vddcore_ranges[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0,    0x7, 0),
+	REGULATOR_LINEAR_RANGE(600000, 0x8, 0x41, 12500),
+};
+
+enum lochnagar_regulators {
+	LOCHNAGAR_MICVDD,
+	LOCHNAGAR_MIC1VDD,
+	LOCHNAGAR_MIC2VDD,
+	LOCHNAGAR_VDDCORE,
+};
+
+static int lochnagar_micbias_of_parse(struct device_node *np,
+				      const struct regulator_desc *desc,
+				      struct regulator_config *config)
+{
+	struct lochnagar *lochnagar = config->driver_data;
+	int shift = (desc->id - LOCHNAGAR_MIC1VDD) *
+		    LOCHNAGAR2_P2_MICBIAS_SRC_SHIFT;
+	int mask = LOCHNAGAR2_P1_MICBIAS_SRC_MASK << shift;
+	unsigned int val;
+	int ret;
+
+	ret = of_property_read_u32(np, "cirrus,micbias-input", &val);
+	if (ret >= 0) {
+		mutex_lock(&lochnagar->analogue_config_lock);
+		ret = regmap_update_bits(lochnagar->regmap,
+					 LOCHNAGAR2_ANALOGUE_PATH_CTRL2,
+					 mask, val << shift);
+		mutex_unlock(&lochnagar->analogue_config_lock);
+		if (ret < 0) {
+			dev_err(lochnagar->dev,
+				"Failed to update micbias source: %d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static const struct regulator_desc lochnagar_regulators[] = {
+	[LOCHNAGAR_MICVDD] = {
+		.name = "MICVDD",
+		.supply_name = "SYSVDD",
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 32,
+		.ops = &lochnagar_micvdd_ops,
+
+		.id = LOCHNAGAR_MICVDD,
+		.of_match = of_match_ptr("MICVDD"),
+
+		.enable_reg = LOCHNAGAR2_MICVDD_CTRL1,
+		.enable_mask = LOCHNAGAR2_MICVDD_REG_ENA_MASK,
+		.vsel_reg = LOCHNAGAR2_MICVDD_CTRL2,
+		.vsel_mask = LOCHNAGAR2_MICVDD_VSEL_MASK,
+
+		.linear_ranges = lochnagar_micvdd_ranges,
+		.n_linear_ranges = ARRAY_SIZE(lochnagar_micvdd_ranges),
+
+		.enable_time = 3000,
+		.ramp_delay = 1000,
+
+		.owner = THIS_MODULE,
+	},
+	[LOCHNAGAR_MIC1VDD] = {
+		.name = "MIC1VDD",
+		.supply_name = "MICBIAS1",
+		.type = REGULATOR_VOLTAGE,
+		.ops = &lochnagar_micbias_ops,
+
+		.id = LOCHNAGAR_MIC1VDD,
+		.of_match = of_match_ptr("MIC1VDD"),
+		.of_parse_cb = lochnagar_micbias_of_parse,
+
+		.enable_reg = LOCHNAGAR2_ANALOGUE_PATH_CTRL2,
+		.enable_mask = LOCHNAGAR2_P1_INPUT_BIAS_ENA_MASK,
+
+		.owner = THIS_MODULE,
+	},
+	[LOCHNAGAR_MIC2VDD] = {
+		.name = "MIC2VDD",
+		.supply_name = "MICBIAS2",
+		.type = REGULATOR_VOLTAGE,
+		.ops = &lochnagar_micbias_ops,
+
+		.id = LOCHNAGAR_MIC2VDD,
+		.of_match = of_match_ptr("MIC2VDD"),
+		.of_parse_cb = lochnagar_micbias_of_parse,
+
+		.enable_reg = LOCHNAGAR2_ANALOGUE_PATH_CTRL2,
+		.enable_mask = LOCHNAGAR2_P2_INPUT_BIAS_ENA_MASK,
+
+		.owner = THIS_MODULE,
+	},
+	[LOCHNAGAR_VDDCORE] = {
+		.name = "VDDCORE",
+		.supply_name = "SYSVDD",
+		.type = REGULATOR_VOLTAGE,
+		.n_voltages = 66,
+		.ops = &lochnagar_vddcore_ops,
+
+		.id = LOCHNAGAR_VDDCORE,
+		.of_match = of_match_ptr("VDDCORE"),
+
+		.enable_reg = LOCHNAGAR2_VDDCORE_CDC_CTRL1,
+		.enable_mask = LOCHNAGAR2_VDDCORE_CDC_REG_ENA_MASK,
+		.vsel_reg = LOCHNAGAR2_VDDCORE_CDC_CTRL2,
+		.vsel_mask = LOCHNAGAR2_VDDCORE_CDC_VSEL_MASK,
+
+		.linear_ranges = lochnagar_vddcore_ranges,
+		.n_linear_ranges = ARRAY_SIZE(lochnagar_vddcore_ranges),
+
+		.enable_time = 3000,
+		.ramp_delay = 1000,
+		.off_on_delay = 15000,
+
+		.owner = THIS_MODULE,
+	},
+};
+
+static const struct of_device_id lochnagar_of_match[] = {
+	{
+		.compatible = "cirrus,lochnagar2-micvdd",
+		.data = &lochnagar_regulators[LOCHNAGAR_MICVDD],
+	},
+	{
+		.compatible = "cirrus,lochnagar2-mic1vdd",
+		.data = &lochnagar_regulators[LOCHNAGAR_MIC1VDD],
+	},
+	{
+		.compatible = "cirrus,lochnagar2-mic2vdd",
+		.data = &lochnagar_regulators[LOCHNAGAR_MIC2VDD],
+	},
+	{
+		.compatible = "cirrus,lochnagar2-vddcore",
+		.data = &lochnagar_regulators[LOCHNAGAR_VDDCORE],
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, lochnagar_of_match);
+
+static int lochnagar_regulator_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct lochnagar *lochnagar = dev_get_drvdata(dev->parent);
+	struct regulator_config config = { };
+	const struct of_device_id *of_id;
+	const struct regulator_desc *desc;
+	struct regulator_dev *rdev;
+	int ret;
+
+	config.dev = dev;
+	config.regmap = lochnagar->regmap;
+	config.driver_data = lochnagar;
+
+	of_id = of_match_device(lochnagar_of_match, dev);
+	if (!of_id)
+		return -EINVAL;
+
+	desc = of_id->data;
+
+	rdev = devm_regulator_register(dev, desc, &config);
+	if (IS_ERR(rdev)) {
+		ret = PTR_ERR(rdev);
+		dev_err(dev, "Failed to register %s regulator: %d\n",
+			desc->name, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static struct platform_driver lochnagar_regulator_driver = {
+	.driver = {
+		.name = "lochnagar-regulator",
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+		.of_match_table = of_match_ptr(lochnagar_of_match),
+	},
+
+	.probe = lochnagar_regulator_probe,
+};
+module_platform_driver(lochnagar_regulator_driver);
+
+MODULE_AUTHOR("Charles Keepax <ckeepax@opensource.cirrus.com>");
+MODULE_DESCRIPTION("Regulator driver for Cirrus Logic Lochnagar Board");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:lochnagar-regulator");