v4.19.13 snapshot.
diff --git a/include/linux/rtc/ds1307.h b/include/linux/rtc/ds1307.h
new file mode 100644
index 0000000..291b1c4
--- /dev/null
+++ b/include/linux/rtc/ds1307.h
@@ -0,0 +1,22 @@
+/*
+ * ds1307.h - platform_data for the ds1307 (and variants) rtc driver
+ * (C) Copyright 2012 by Wolfram Sang, Pengutronix e.K.
+ * same license as the driver
+ */
+
+#ifndef _LINUX_DS1307_H
+#define _LINUX_DS1307_H
+
+#include <linux/types.h>
+
+#define DS1307_TRICKLE_CHARGER_250_OHM 0x01
+#define DS1307_TRICKLE_CHARGER_2K_OHM 0x02
+#define DS1307_TRICKLE_CHARGER_4K_OHM 0x03
+#define DS1307_TRICKLE_CHARGER_NO_DIODE 0x04
+#define DS1307_TRICKLE_CHARGER_DIODE 0x08
+
+struct ds1307_platform_data {
+ u8 trickle_charger_setup;
+};
+
+#endif /* _LINUX_DS1307_H */