Improve documentation for the (H)SCIF Serial Port Register:
- Make it clear the RTS and CTS lines are active-low,
- Document the bits related to the serial port's clock pin.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
v2:
- New.
---
drivers/tty/serial/sh-sci.h | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h
index 7a4fa185b93ef307..85a2b81ba0a845e5 100644
--- a/drivers/tty/serial/sh-sci.h
+++ b/drivers/tty/serial/sh-sci.h
@@ -108,10 +108,12 @@ enum {
#define SCLSR_ORER BIT(0) /* Overrun Error */
/* SCSPTR (Serial Port Register), optional */
-#define SCSPTR_RTSIO BIT(7) /* Serial Port RTS Pin Input/Output */
-#define SCSPTR_RTSDT BIT(6) /* Serial Port RTS Pin Data */
-#define SCSPTR_CTSIO BIT(5) /* Serial Port CTS Pin Input/Output */
-#define SCSPTR_CTSDT BIT(4) /* Serial Port CTS Pin Data */
+#define SCSPTR_RTSIO BIT(7) /* Serial Port RTS# Pin Input/Output */
+#define SCSPTR_RTSDT BIT(6) /* Serial Port RTS# Pin Data */
+#define SCSPTR_CTSIO BIT(5) /* Serial Port CTS# Pin Input/Output */
+#define SCSPTR_CTSDT BIT(4) /* Serial Port CTS# Pin Data */
+#define SCSPTR_SCKIO BIT(3) /* Serial Port Clock Pin Input/Output */
+#define SCSPTR_SCKDT BIT(2) /* Serial Port Clock Pin Data */
#define SCSPTR_SPB2IO BIT(1) /* Serial Port Break Input/Output */
#define SCSPTR_SPB2DT BIT(0) /* Serial Port Break Data */
--
1.9.1
