linux-kernel - Re: [PATCH] ARM: fix wrong address when loading PRM_FRAC_INCREMENTOR_DENUMERATOR

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Message-Id: <4F20F648-FED2-4877-8896-EF6F12295615@gmail.com>
Date:	Wed, 7 Aug 2013 21:35:43 +0800
From:	Chen Baozi <baozich@...il.com>
To:	Tony Lindgren <tony@...mide.com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: fix wrong address when loading PRM_FRAC_INCREMENTOR_DENUMERATOR_RELOAD


On Aug 7, 2013, at 7:09 PM, Tony Lindgren <tony@...mide.com> wrote:

> * Chen Baozi <baozich@...il.com> [130805 08:33]:
>> ping?
>> 
>> On Aug 1, 2013, at 7:27 PM, Chen Baozi <baozich@...il.com> wrote:
>> 
>>> The denominator should be load from INCREMENTOR_DENUMERATOR_RELOAD_OFFSET
>>> rather than INCREMENTER_NUMERATOR_OFFSET.
> 
> Maybe describe what exactly happens without this fix?

I think it is more likely a typo, since 
INCREMENTER_DENUMERATOR_RELOAD[23:17] is reserved. It seems
that it won't make much trouble without this fix because
the useful [11:0] bit is mask and set the right value later.

Cheers,

Baozi

> 
> Also we should get few acks for this for the -rc series.
> 
> Regards,
> 
> Tony
> 
>>> Signed-off-by: Chen Baozi <baozich@...il.com>
>>> ---
>>> arch/arm/mach-omap2/timer.c | 2 +-
>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>> 
>>> diff --git a/arch/arm/mach-omap2/timer.c b/arch/arm/mach-omap2/timer.c
>>> index b37e1fc..9265e03 100644
>>> --- a/arch/arm/mach-omap2/timer.c
>>> +++ b/arch/arm/mach-omap2/timer.c
>>> @@ -537,7 +537,7 @@ static void __init realtime_counter_init(void)
>>> 	reg |= num;
>>> 	__raw_writel(reg, base + INCREMENTER_NUMERATOR_OFFSET);
>>> 
>>> -	reg = __raw_readl(base + INCREMENTER_NUMERATOR_OFFSET) &
>>> +	reg = __raw_readl(base + INCREMENTER_DENUMERATOR_RELOAD_OFFSET) &
>>> 			NUMERATOR_DENUMERATOR_MASK;
>>> 	reg |= den;
>>> 	__raw_writel(reg, base + INCREMENTER_DENUMERATOR_RELOAD_OFFSET);
>>> -- 
>>> 1.8.1.4
>>> 
>> 

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