diff --git a/src/kernel/linux/v4.19/lib/bcd.c b/src/kernel/linux/v4.19/lib/bcd.c
new file mode 100644
index 0000000..7e4750b
--- /dev/null
+++ b/src/kernel/linux/v4.19/lib/bcd.c
@@ -0,0 +1,15 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/bcd.h>
+#include <linux/export.h>
+
+unsigned _bcd2bin(unsigned char val)
+{
+	return (val & 0x0f) + (val >> 4) * 10;
+}
+EXPORT_SYMBOL(_bcd2bin);
+
+unsigned char _bin2bcd(unsigned val)
+{
+	return ((val / 10) << 4) + val % 10;
+}
+EXPORT_SYMBOL(_bin2bcd);