diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2016-06-03 12:00:07 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-25 09:07:51 -0700 |
| commit | 4780c09f7a0926674c96c0a40dfeb7469f759c8e (patch) | |
| tree | ec66c0c378cfcd6bcc23b22a8396988a70b1331b /drivers/tty/serial/sh-sci.h | |
| parent | ef5e90e8ccb7b715c0a1509339f730b2bf9698a2 (diff) | |
serial: sh-sci: Add more Serial Port Control/Data Register documentation
Improve documentation for the SCIFA/SCIFB Serial Port Control and Data
Registers:
- State clearly that the RTS and CTS lines are active-low,
- Document the bits related to the serial port's SCK, RXD, and TXD
pins.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/sh-sci.h')
| -rw-r--r-- | drivers/tty/serial/sh-sci.h | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/tty/serial/sh-sci.h b/drivers/tty/serial/sh-sci.h index 85a2b81ba0a8..e7d2bc692a58 100644 --- a/drivers/tty/serial/sh-sci.h +++ b/drivers/tty/serial/sh-sci.h @@ -121,12 +121,18 @@ enum { #define HSCIF_SRE BIT(15) /* Sampling Rate Register Enable */ /* SCPCR (Serial Port Control Register), SCIFA/SCIFB only */ -#define SCPCR_RTSC BIT(4) /* Serial Port RTS Pin / Output Pin */ -#define SCPCR_CTSC BIT(3) /* Serial Port CTS Pin / Input Pin */ +#define SCPCR_RTSC BIT(4) /* Serial Port RTS# Pin / Output Pin */ +#define SCPCR_CTSC BIT(3) /* Serial Port CTS# Pin / Input Pin */ +#define SCPCR_SCKC BIT(2) /* Serial Port SCK Pin / Output Pin */ +#define SCPCR_RXDC BIT(1) /* Serial Port RXD Pin / Input Pin */ +#define SCPCR_TXDC BIT(0) /* Serial Port TXD Pin / Output Pin */ /* SCPDR (Serial Port Data Register), SCIFA/SCIFB only */ -#define SCPDR_RTSD BIT(4) /* Serial Port RTS Output Pin Data */ -#define SCPDR_CTSD BIT(3) /* Serial Port CTS Input Pin Data */ +#define SCPDR_RTSD BIT(4) /* Serial Port RTS# Output Pin Data */ +#define SCPDR_CTSD BIT(3) /* Serial Port CTS# Input Pin Data */ +#define SCPDR_SCKD BIT(2) /* Serial Port SCK Output Pin Data */ +#define SCPDR_RXDD BIT(1) /* Serial Port RXD Input Pin Data */ +#define SCPDR_TXDD BIT(0) /* Serial Port TXD Output Pin Data */ /* * BRG Clock Select Register (Some SCIF and HSCIF) |