ASoC: cs35l41: CS35L41 Boosted Smart Amplifier

SoC Audio driver for the Cirrus Logic CS35L41 amplifier

Signed-off-by: David Rhodes <drhodes@opensource.cirrus.com>
Tested-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210907225719.2018115-2-drhodes@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 114 insertions, 0 deletions

diff --git a/sound/soc/codecs/cs35l41-i2c.c b/sound/soc/codecs/cs35l41-i2c.c
new file mode 100644
index 000000000000..dc9da78df412
--- /dev/null
+++ b/sound/soc/codecs/cs35l41-i2c.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// cs35l41-i2c.c -- CS35l41 I2C driver
+//
+// Copyright 2017-2021 Cirrus Logic, Inc.
+//
+// Author: David Rhodes <david.rhodes@cirrus.com>
+
+#include <linux/acpi.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <sound/cs35l41.h>
+#include "cs35l41.h"
+
+static struct regmap_config cs35l41_regmap_i2c = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = CS35L41_REGSTRIDE,
+	.reg_format_endian = REGMAP_ENDIAN_BIG,
+	.val_format_endian = REGMAP_ENDIAN_BIG,
+	.max_register = CS35L41_LASTREG,
+	.reg_defaults = cs35l41_reg,
+	.num_reg_defaults = ARRAY_SIZE(cs35l41_reg),
+	.volatile_reg = cs35l41_volatile_reg,
+	.readable_reg = cs35l41_readable_reg,
+	.precious_reg = cs35l41_precious_reg,
+	.cache_type = REGCACHE_RBTREE,
+};
+
+static const struct i2c_device_id cs35l41_id_i2c[] = {
+	{ "cs35l40", 0 },
+	{ "cs35l41", 0 },
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c);
+
+static int cs35l41_i2c_probe(struct i2c_client *client,
+				const struct i2c_device_id *id)
+{
+	struct cs35l41_private *cs35l41;
+	struct device *dev = &client->dev;
+	struct cs35l41_platform_data *pdata = dev_get_platdata(dev);
+	const struct regmap_config *regmap_config = &cs35l41_regmap_i2c;
+	int ret;
+
+	cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL);
+
+	if (!cs35l41)
+		return -ENOMEM;
+
+	cs35l41->dev = dev;
+	cs35l41->irq = client->irq;
+
+	i2c_set_clientdata(client, cs35l41);
+	cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config);
+	if (IS_ERR(cs35l41->regmap)) {
+		ret = PTR_ERR(cs35l41->regmap);
+		dev_err(cs35l41->dev, "Failed to allocate register map: %d\n",
+			ret);
+		return ret;
+	}
+
+	return cs35l41_probe(cs35l41, pdata);
+}
+
+static int cs35l41_i2c_remove(struct i2c_client *client)
+{
+	struct cs35l41_private *cs35l41 = i2c_get_clientdata(client);
+
+	return cs35l41_remove(cs35l41);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id cs35l41_of_match[] = {
+	{ .compatible = "cirrus,cs35l40" },
+	{ .compatible = "cirrus,cs35l41" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, cs35l41_of_match);
+#endif
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id cs35l41_acpi_match[] = {
+	{ "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
+	{},
+};
+MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
+#endif
+
+static struct i2c_driver cs35l41_i2c_driver = {
+	.driver = {
+		.name		= "cs35l41",
+		.of_match_table = of_match_ptr(cs35l41_of_match),
+		.acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
+	},
+	.id_table	= cs35l41_id_i2c,
+	.probe		= cs35l41_i2c_probe,
+	.remove		= cs35l41_i2c_remove,
+};
+
+module_i2c_driver(cs35l41_i2c_driver);
+
+MODULE_DESCRIPTION("I2C CS35L41 driver");
+MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
+MODULE_LICENSE("GPL");