diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index b77ac36af2..ee09218558 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -239,6 +239,12 @@ static int ti_sci_do_xfer(struct ti_sci_info *info,
 	struct ti_sci_secure_msg_hdr *secure_hdr = (struct ti_sci_secure_msg_hdr *)secure_buf;
 	int ret;
 
+	/*
+	 * The reason why we need the is_secure code is because of boot R5.
+	 * boot R5 starts off in "secure mode" when it hands off from Boot
+	 * ROM over to the Secondary bootloader. The initial set of calls
+	 * we have to make need to be on a secure pipe.
+	 */
 	if (info->is_secure) {
 		/* ToDo: get checksum of the entire message */
 		secure_hdr->checksum = 0;