Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 118aee4d authored by Magnus Damm's avatar Magnus Damm Committed by Simon Horman
Browse files

clocksource: sh_cmt: Add CMT register layout comment 



Add a comment about different register layouts
supported by the CMT driver.

Signed-off-by: default avatarMagnus Damm <damm@opensource.se>
Acked-by: default avatarJohn Stultz <john.stultz@linaro.org>
Tested-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent cccd7045

drivers/clocksource/sh_cmt.c

+15 −0
Original line number Diff line number Diff line
@@ -66,6 +66,21 @@ struct sh_cmt_priv { 
			    unsigned long value);

};



/* Examples of supported CMT timer register layouts and I/O access widths:

 *

 * "16-bit counter and 16-bit control" as found on sh7263:

 * CMSTR 0xfffec000 16-bit

 * CMCSR 0xfffec002 16-bit

 * CMCNT 0xfffec004 16-bit

 * CMCOR 0xfffec006 16-bit

 *

 * "32-bit counter and 16-bit control" as found on sh7372, sh73a0, r8a7740:

 * CMSTR 0xffca0000 16-bit

 * CMCSR 0xffca0060 16-bit

 * CMCNT 0xffca0064 32-bit

 * CMCOR 0xffca0068 32-bit

 */



static unsigned long sh_cmt_read16(void __iomem *base, unsigned long offs)

{

	return ioread16(base + (offs << 1));