linux-kernel - Re: [PATCH] ARM: fix regression in IXP4xx clocksource

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Date:	Tue, 12 Jul 2011 10:05:13 +0200
From:	Richard Cochran <richardcochran@...il.com>
To:	Krzysztof Halasa <khc@...waw.pl>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ARM: fix regression in IXP4xx clocksource

On Wed, Jul 06, 2011 at 11:02:17PM +0200, Krzysztof Halasa wrote:
> From: Richard Cochran <richardcochran@...il.com>
> 
> Commit 234b6ceddb4fc2a4bc5b9a7670f070f6e69e0868
> 
>    clocksource: convert ARM 32-bit up counting clocksources
> 
> broke the build for ixp4xx and made big endian operation impossible.
> This commit restores the original behaviour.

I know I nag, but can we *please* have this patch in 3.0?
Big endian IXP really, really does not work without it.

Thanks,

Richard

> 
> Signed-off-by: Richard Cochran <richard.cochran@...cron.at>
> Signed-off-by: Krzysztof Hałasa <khc@...waw.pl>
> 
> diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
> index 74ed81a..0777257 100644
> --- a/arch/arm/mach-ixp4xx/common.c
> +++ b/arch/arm/mach-ixp4xx/common.c
> @@ -419,14 +419,20 @@ static void notrace ixp4xx_update_sched_clock(void)
>  /*
>   * clocksource
>   */
> +
> +static cycle_t ixp4xx_clocksource_read(struct clocksource *c)
> +{
> +	return *IXP4XX_OSTS;
> +}
> +
>  unsigned long ixp4xx_timer_freq = IXP4XX_TIMER_FREQ;
>  EXPORT_SYMBOL(ixp4xx_timer_freq);
>  static void __init ixp4xx_clocksource_init(void)
>  {
>  	init_sched_clock(&cd, ixp4xx_update_sched_clock, 32, ixp4xx_timer_freq);
>  
> -	clocksource_mmio_init(&IXP4XX_OSTS, "OSTS", ixp4xx_timer_freq, 200, 32,
> -			clocksource_mmio_readl_up);
> +	clocksource_mmio_init(NULL, "OSTS", ixp4xx_timer_freq, 200, 32,
> +			ixp4xx_clocksource_read);
>  }
>  
>  /*
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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