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Commit ef5e90e8 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Greg Kroah-Hartman
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serial: sh-sci: Add more Serial Port Register documentation 



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: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent abbf121f

drivers/tty/serial/sh-sci.h

+6 −4
Original line number Diff line number Diff line
@@ -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 */