ASoC: cs42l42: Split I2C identity into separate module

Split the I2C bus driver definition and probe()/remove() into a
separate module so that a SoundWire build of CS42L42 support does
not have a spurious dependency on I2C.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20220915094444.11434-8-povik+lin@cutebit.org
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 107 insertions, 0 deletions

diff --git a/sound/soc/codecs/cs42l42-i2c.c b/sound/soc/codecs/cs42l42-i2c.c
new file mode 100644
index 000000000000..5f01b6adc17e
--- /dev/null
+++ b/sound/soc/codecs/cs42l42-i2c.c
@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * cs42l42-i2c.c -- CS42L42 ALSA SoC audio driver for I2C
+ *
+ * Copyright 2016, 2022 Cirrus Logic, Inc.
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include "cs42l42.h"
+
+static int cs42l42_i2c_probe(struct i2c_client *i2c_client)
+{
+	struct device *dev = &i2c_client->dev;
+	struct cs42l42_private *cs42l42;
+	struct regmap *regmap;
+	int ret;
+
+	cs42l42 = devm_kzalloc(dev, sizeof(*cs42l42), GFP_KERNEL);
+	if (!cs42l42)
+		return -ENOMEM;
+
+	regmap = devm_regmap_init_i2c(i2c_client, &cs42l42_regmap);
+	if (IS_ERR(regmap)) {
+		ret = PTR_ERR(regmap);
+		dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
+		return ret;
+	}
+
+	cs42l42->dev = dev;
+	cs42l42->regmap = regmap;
+	cs42l42->irq = i2c_client->irq;
+
+	ret = cs42l42_common_probe(cs42l42, &cs42l42_soc_component, &cs42l42_dai);
+	if (ret)
+		return ret;
+
+	return cs42l42_init(cs42l42);
+}
+
+static int cs42l42_i2c_remove(struct i2c_client *i2c_client)
+{
+	struct cs42l42_private *cs42l42 = dev_get_drvdata(&i2c_client->dev);
+
+	cs42l42_common_remove(cs42l42);
+
+	return 0;
+}
+
+static int __maybe_unused cs42l42_i2c_resume(struct device *dev)
+{
+	int ret;
+
+	ret = cs42l42_resume(dev);
+	if (ret)
+		return ret;
+
+	cs42l42_resume_restore(dev);
+
+	return 0;
+}
+
+static const struct dev_pm_ops cs42l42_i2c_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(cs42l42_suspend, cs42l42_i2c_resume)
+};
+
+static const struct of_device_id __maybe_unused cs42l42_of_match[] = {
+	{ .compatible = "cirrus,cs42l42", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, cs42l42_of_match);
+
+static const struct acpi_device_id __maybe_unused cs42l42_acpi_match[] = {
+	{"10134242", 0,},
+	{}
+};
+MODULE_DEVICE_TABLE(acpi, cs42l42_acpi_match);
+
+static const struct i2c_device_id cs42l42_id[] = {
+	{"cs42l42", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(i2c, cs42l42_id);
+
+static struct i2c_driver cs42l42_i2c_driver = {
+	.driver = {
+		.name = "cs42l42",
+		.pm = &cs42l42_i2c_pm_ops,
+		.of_match_table = of_match_ptr(cs42l42_of_match),
+		.acpi_match_table = ACPI_PTR(cs42l42_acpi_match),
+		},
+	.id_table = cs42l42_id,
+	.probe_new = cs42l42_i2c_probe,
+	.remove = cs42l42_i2c_remove,
+};
+
+module_i2c_driver(cs42l42_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC CS42L42 I2C driver");
+MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(SND_SOC_CS42L42_CORE);