1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/si21xx.h b/drivers/media/dvb-frontends/si21xx.h
new file mode 100644
index 000000000..12fa1d579
--- /dev/null
+++ b/drivers/media/dvb-frontends/si21xx.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef SI21XX_H
+#define SI21XX_H
+
+#include <linux/dvb/frontend.h>
+#include <media/dvb_frontend.h>
+
+struct si21xx_config {
+	/* the demodulator's i2c address */
+	u8 demod_address;
+
+	/* minimum delay before retuning */
+	int min_delay_ms;
+};
+
+#if IS_REACHABLE(CONFIG_DVB_SI21XX)
+extern struct dvb_frontend *si21xx_attach(const struct si21xx_config *config,
+						struct i2c_adapter *i2c);
+#else
+static inline struct dvb_frontend *si21xx_attach(
+		const struct si21xx_config *config, struct i2c_adapter *i2c)
+{
+	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
+	return NULL;
+}
+#endif
+
+static inline int si21xx_writeregister(struct dvb_frontend *fe, u8 reg, u8 val)
+{
+	int r = 0;
+	u8 buf[] = {reg, val};
+	if (fe->ops.write)
+		r = fe->ops.write(fe, buf, 2);
+	return r;
+}
+
+#endif