ASoC: cs35l45: Add driver for Cirrus Logic CS35L45 Smart Amp

The CS35L45 is a 15 V Boosted Mono Class D Amplifier with DSP
Speaker Protection and Adaptive Battery Management.

This initial driver provides standard non-boosted audio operation
without the DSP.

Signed-off-by: James Schulman <james.schulman@cirrus.com>
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20220405135419.1230088-6-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 72 insertions, 0 deletions

diff --git a/sound/soc/codecs/cs35l45-i2c.c b/sound/soc/codecs/cs35l45-i2c.c
new file mode 100644
index 000000000000..18ebf1e14b91
--- /dev/null
+++ b/sound/soc/codecs/cs35l45-i2c.c
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+//
+// cs35l45-i2c.c -- CS35L45 I2C driver
+//
+// Copyright 2019-2022 Cirrus Logic, Inc.
+//
+// Author: James Schulman <james.schulman@cirrus.com>
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+
+#include "cs35l45.h"
+
+static int cs35l45_i2c_probe(struct i2c_client *client)
+{
+	struct cs35l45_private *cs35l45;
+	struct device *dev = &client->dev;
+	int ret;
+
+	cs35l45 = devm_kzalloc(dev, sizeof(struct cs35l45_private), GFP_KERNEL);
+	if (!cs35l45)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, cs35l45);
+	cs35l45->regmap = devm_regmap_init_i2c(client, &cs35l45_i2c_regmap);
+	if (IS_ERR(cs35l45->regmap)) {
+		ret = PTR_ERR(cs35l45->regmap);
+		dev_err(dev, "Failed to allocate register map: %d\n", ret);
+		return ret;
+	}
+
+	cs35l45->dev = dev;
+
+	return cs35l45_probe(cs35l45);
+}
+
+static int cs35l45_i2c_remove(struct i2c_client *client)
+{
+	struct cs35l45_private *cs35l45 = i2c_get_clientdata(client);
+
+	return cs35l45_remove(cs35l45);
+}
+
+static const struct of_device_id cs35l45_of_match[] = {
+	{ .compatible = "cirrus,cs35l45" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, cs35l45_of_match);
+
+static const struct i2c_device_id cs35l45_id_i2c[] = {
+	{ "cs35l45", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, cs35l45_id_i2c);
+
+static struct i2c_driver cs35l45_i2c_driver = {
+	.driver = {
+		.name		= "cs35l45",
+		.of_match_table = cs35l45_of_match,
+		.pm		= &cs35l45_pm_ops,
+	},
+	.id_table	= cs35l45_id_i2c,
+	.probe_new	= cs35l45_i2c_probe,
+	.remove		= cs35l45_i2c_remove,
+};
+module_i2c_driver(cs35l45_i2c_driver);
+
+MODULE_DESCRIPTION("I2C CS35L45 driver");
+MODULE_AUTHOR("James Schulman, Cirrus Logic Inc, <james.schulman@cirrus.com>");
+MODULE_LICENSE("Dual BSD/GPL");