serial: sh-sci: Add more Serial Mode Register documentation
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h
index fb17602..7a4fa18 100644
--- a/drivers/tty/serial/sh-sci.h
+++ b/drivers/tty/serial/sh-sci.h
@@ -35,12 +35,27 @@
/* SCSMR (Serial Mode Register) */
+#define SCSMR_C_A BIT(7) /* Communication Mode */
+#define SCSMR_CSYNC BIT(7) /* - Clocked synchronous mode */
+#define SCSMR_ASYNC 0 /* - Asynchronous mode */
#define SCSMR_CHR BIT(6) /* 7-bit Character Length */
#define SCSMR_PE BIT(5) /* Parity Enable */
#define SCSMR_ODD BIT(4) /* Odd Parity */
#define SCSMR_STOP BIT(3) /* Stop Bit Length */
#define SCSMR_CKS 0x0003 /* Clock Select */
+/* Serial Mode Register, SCIFA/SCIFB only bits */
+#define SCSMR_CKEDG BIT(12) /* Transmit/Receive Clock Edge Select */
+#define SCSMR_SRC_MASK 0x0700 /* Sampling Control */
+#define SCSMR_SRC_16 0x0000 /* Sampling rate 1/16 */
+#define SCSMR_SRC_5 0x0100 /* Sampling rate 1/5 */
+#define SCSMR_SRC_7 0x0200 /* Sampling rate 1/7 */
+#define SCSMR_SRC_11 0x0300 /* Sampling rate 1/11 */
+#define SCSMR_SRC_13 0x0400 /* Sampling rate 1/13 */
+#define SCSMR_SRC_17 0x0500 /* Sampling rate 1/17 */
+#define SCSMR_SRC_19 0x0600 /* Sampling rate 1/19 */
+#define SCSMR_SRC_27 0x0700 /* Sampling rate 1/27 */
+
/* Serial Control Register, SCIFA/SCIFB only bits */
#define SCSCR_TDRQE BIT(15) /* Tx Data Transfer Request Enable */
#define SCSCR_RDRQE BIT(14) /* Rx Data Transfer Request Enable */