1 files changed, 124 insertions, 0 deletions
diff --git a/drivers/iio/gyro/mpu3050-i2c.c b/drivers/iio/gyro/mpu3050-i2c.c
new file mode 100644
index 000000000..12e3afa9d
--- /dev/null
+++ b/drivers/iio/gyro/mpu3050-i2c.c
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/i2c-mux.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/pm_runtime.h>
+
+#include "mpu3050.h"
+
+static const struct regmap_config mpu3050_i2c_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int mpu3050_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id)
+{
+	struct mpu3050 *mpu3050 = i2c_mux_priv(mux);
+
+	/* Just power up the device, that is all that is needed */
+	pm_runtime_get_sync(mpu3050->dev);
+	return 0;
+}
+
+static int mpu3050_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id)
+{
+	struct mpu3050 *mpu3050 = i2c_mux_priv(mux);
+
+	pm_runtime_mark_last_busy(mpu3050->dev);
+	pm_runtime_put_autosuspend(mpu3050->dev);
+	return 0;
+}
+
+static int mpu3050_i2c_probe(struct i2c_client *client,
+			     const struct i2c_device_id *id)
+{
+	struct regmap *regmap;
+	const char *name;
+	struct mpu3050 *mpu3050;
+	int ret;
+
+	if (!i2c_check_functionality(client->adapter,
+				     I2C_FUNC_SMBUS_I2C_BLOCK))
+		return -EOPNOTSUPP;
+
+	if (id)
+		name = id->name;
+	else
+		return -ENODEV;
+
+	regmap = devm_regmap_init_i2c(client, &mpu3050_i2c_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "Failed to register i2c regmap: %pe\n",
+			regmap);
+		return PTR_ERR(regmap);
+	}
+
+	ret = mpu3050_common_probe(&client->dev, regmap, client->irq, name);
+	if (ret)
+		return ret;
+
+	/* The main driver is up, now register the I2C mux */
+	mpu3050 = iio_priv(dev_get_drvdata(&client->dev));
+	mpu3050->i2cmux = i2c_mux_alloc(client->adapter, &client->dev,
+					1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE,
+					mpu3050_i2c_bypass_select,
+					mpu3050_i2c_bypass_deselect);
+	/* Just fail the mux, there is no point in killing the driver */
+	if (!mpu3050->i2cmux)
+		dev_err(&client->dev, "failed to allocate I2C mux\n");
+	else {
+		mpu3050->i2cmux->priv = mpu3050;
+		/* Ignore failure, not critical */
+		i2c_mux_add_adapter(mpu3050->i2cmux, 0, 0, 0);
+	}
+
+	return 0;
+}
+
+static void mpu3050_i2c_remove(struct i2c_client *client)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(&client->dev);
+	struct mpu3050 *mpu3050 = iio_priv(indio_dev);
+
+	if (mpu3050->i2cmux)
+		i2c_mux_del_adapters(mpu3050->i2cmux);
+
+	mpu3050_common_remove(&client->dev);
+}
+
+/*
+ * device id table is used to identify what device can be
+ * supported by this driver
+ */
+static const struct i2c_device_id mpu3050_i2c_id[] = {
+	{ "mpu3050" },
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, mpu3050_i2c_id);
+
+static const struct of_device_id mpu3050_i2c_of_match[] = {
+	{ .compatible = "invensense,mpu3050", .data = "mpu3050" },
+	/* Deprecated vendor ID from the Input driver */
+	{ .compatible = "invn,mpu3050", .data = "mpu3050" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, mpu3050_i2c_of_match);
+
+static struct i2c_driver mpu3050_i2c_driver = {
+	.probe = mpu3050_i2c_probe,
+	.remove = mpu3050_i2c_remove,
+	.id_table = mpu3050_i2c_id,
+	.driver = {
+		.of_match_table = mpu3050_i2c_of_match,
+		.name = "mpu3050-i2c",
+		.pm = pm_ptr(&mpu3050_dev_pm_ops),
+	},
+};
+module_i2c_driver(mpu3050_i2c_driver);
+
+MODULE_AUTHOR("Linus Walleij");
+MODULE_DESCRIPTION("Invensense MPU3050 gyroscope driver");
+MODULE_LICENSE("GPL");