tree c7e606155b97f5a7e0a8808b1e2cbf37ea0162ac parent d10689b68aff7b48e3de1a3f7fcd6567bd2905af author Deepak Saxena <[EMAIL PROTECTED]> Wed, 24 Aug 2005 03:30:29 -0700 committer Linus Torvalds <[EMAIL PROTECTED]> Wed, 24 Aug 2005 10:06:33 -0700
[PATCH] Fix IXP4xx CLOCK_TICK_RATE As pointed out in the following thread, the CLOCK_TICK_RATE setting for IXP4xx is incorrect b/c the HW ignores the lowest 2 bits of the LATCH value. http://lists.arm.linux.org.uk/pipermail/linux-arm-kernel/2005-August/030950.html Tnx to George Anziger and Egil Hjelmeland for finding the issue. Signed-off-by: Deepak Saxena <[EMAIL PROTECTED]> Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]> include/asm-arm/arch-ixp4xx/timex.h | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-) diff --git a/include/asm-arm/arch-ixp4xx/timex.h b/include/asm-arm/arch-ixp4xx/timex.h --- a/include/asm-arm/arch-ixp4xx/timex.h +++ b/include/asm-arm/arch-ixp4xx/timex.h @@ -7,7 +7,9 @@ /* * We use IXP425 General purpose timer for our timer needs, it runs at - * 66.66... MHz + * 66.66... MHz. We do a convulted calculation of CLOCK_TICK_RATE b/c the + * timer register ignores the bottom 2 bits of the LATCH value. */ -#define CLOCK_TICK_RATE (66666666) +#define FREQ 66666666 +#define CLOCK_TICK_RATE (((FREQ / HZ & ~IXP4XX_OST_RELOAD_MASK) + 1) * HZ) - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
