From: nicolas.ferre@atmel•com (Nicolas Ferre)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH 2/2] ARM: at91: clock: fix PLLA overclocked warning
Date: Mon, 9 Jul 2012 16:52:16 +0200 [thread overview]
Message-ID: <4FFAF020.1080805@atmel.com> (raw)
In-Reply-To: <1341825375-9143-1-git-send-email-jiri.prchal@aksignal.cz>
Hi Jiri,
On 07/09/2012 11:16 AM, Jiri Prchal :
> This patch fix false warning "PLLA overclocked". Maximum frequency
> for sam9260 is 210MHz as stated in atmel's datasheet. Originally there was
> plus 4.5%, so I add this 4.5% to new value too.
Well, I do not see this 4.5% in addition. It is true that Maximum
frequency had been indicated as higher but current value is 210MHz if
VDD core is @ 1.8V (for industrial temperature range).
> Signed-off-by: Jiri Prchal <jiri.prchal@aksignal•cz>
> ---
> arch/arm/mach-at91/clock.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mach-at91/clock.c b/arch/arm/mach-at91/clock.c
> index de2ec6b..e004308 100644
> --- a/arch/arm/mach-at91/clock.c
> +++ b/arch/arm/mach-at91/clock.c
> @@ -707,7 +707,7 @@ static int __init at91_pmc_init(unsigned long main_clock)
> if (plla.rate_hz > 800000000)
> pll_overclock = true;
> } else {
> - if (plla.rate_hz > 209000000)
> + if (plla.rate_hz > 219000000)
Well, I rework this patch using 210 MHz as stated in datasheet. We shall
keep this 209 MHz test because at91rm9200 is still using this value.
Moreover, I add a new category for 240 MHz.
> pll_overclock = true;
> }
> if (pll_overclock)
Thanks, best regards,
--
Nicolas Ferre
prev parent reply other threads:[~2012-07-09 14:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-09 9:16 [PATCH 2/2] ARM: at91: clock: fix PLLA overclocked warning Jiri Prchal
2012-07-09 14:52 ` Nicolas Ferre [this message]
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