1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/media/usb/dvb-usb/dvb-usb-i2c.c b/drivers/media/usb/dvb-usb/dvb-usb-i2c.c
new file mode 100644
index 0000000000..bc4b2abdde
--- /dev/null
+++ b/drivers/media/usb/dvb-usb/dvb-usb-i2c.c
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0
+/* dvb-usb-i2c.c is part of the DVB USB library.
+ *
+ * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.de)
+ * see dvb-usb-init.c for copyright information.
+ *
+ * This file contains functions for (de-)initializing an I2C adapter.
+ */
+#include "dvb-usb-common.h"
+
+int dvb_usb_i2c_init(struct dvb_usb_device *d)
+{
+	int ret = 0;
+
+	if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER))
+		return 0;
+
+	if (d->props.i2c_algo == NULL) {
+		err("no i2c algorithm specified");
+		ret = -EINVAL;
+		goto err;
+	}
+
+	strscpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));
+	d->i2c_adap.algo      = d->props.i2c_algo;
+	d->i2c_adap.algo_data = NULL;
+	d->i2c_adap.dev.parent = &d->udev->dev;
+
+	i2c_set_adapdata(&d->i2c_adap, d);
+
+	ret = i2c_add_adapter(&d->i2c_adap);
+	if (ret < 0) {
+		err("could not add i2c adapter");
+		goto err;
+	}
+
+	d->state |= DVB_USB_STATE_I2C;
+
+err:
+	return ret;
+}
+
+int dvb_usb_i2c_exit(struct dvb_usb_device *d)
+{
+	if (d->state & DVB_USB_STATE_I2C)
+		i2c_del_adapter(&d->i2c_adap);
+	d->state &= ~DVB_USB_STATE_I2C;
+	return 0;
+}