From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
To: Alexander Shiyan <shc_work@mail.ru>
Cc: barebox@lists.infradead.org
Subject: Re: [SPAM] Re[2]: [PATCH v2 3/9] ARM: clps711x: Adds config option for CPU PLL multiplier
Date: Wed, 13 Feb 2013 14:36:12 +0100 [thread overview]
Message-ID: <20130213133612.GN19322@game.jcrosoft.org> (raw)
In-Reply-To: <1360758205.278703573@f188.mail.ru>
On 16:23 Wed 13 Feb , Alexander Shiyan wrote:
> ...
> > > diff --git a/arch/arm/boards/clep7212/lowlevel.c b/arch/arm/boards/clep7212/lowlevel.c
> > > index b7d6d1d..fcf8285 100644
> > > --- a/arch/arm/boards/clep7212/lowlevel.c
> > > +++ b/arch/arm/boards/clep7212/lowlevel.c
> > > @@ -14,9 +14,13 @@
> > >
> > > #include <mach/clps711x.h>
> > >
> > > +#if (CONFIG_CLPS711X_CPU_PLL_MULT < 20) || (CONFIG_CLPS711X_CPU_PLL_MULT > 50)
> > > +# error "CPU PLL multiplier out of range"
> > > +#endif
> > > +
> > > void __naked __bare_init barebox_arm_reset_vector(void)
> > > {
> > > arm_cpu_lowlevel_init();
> > >
> > > - clps711x_barebox_entry();
> > > + clps711x_barebox_entry(CONFIG_CLPS711X_CPU_PLL_MULT);
> > > }
> > > diff --git a/arch/arm/mach-clps711x/Kconfig b/arch/arm/mach-clps711x/Kconfig
> > > index f0adeda..d2873b4 100644
> > > --- a/arch/arm/mach-clps711x/Kconfig
> > > +++ b/arch/arm/mach-clps711x/Kconfig
> > > @@ -10,6 +10,19 @@ config MACH_CLEP7212
> > >
> > > endchoice
> > >
> > > +menu "CLPS711X specific settings"
> > > +
> > > +config CLPS711X_CPU_PLL_MULT
> > > + int "CPU PLL multiplier (20-50)"
> > > + range 20 50
> > > + default "40"
> > > + help
> > > + Define CPU PLL multiplier. PLL is calculated by formula:
> > > + PLL Frequency = (PLL Multiplier / 2) * 3686400 Hz
> > > + Default value is 40, for achieve 73 MHz.
> > > +
> > Nack NO KConfig for such sensitve value
> >
> > if it's soc detect it I do not have the datasheet but I'm sure you can
>
> There are two possible clock sources: 3.6864 MHz crystal or 13 MHz
> clock. Only source can be detected. When crystal is chosen, CPU starts at
> low speed, so we should setup PLL register to increase speed.
> Detect more is impossible.
>
> Datasheet, if you interest, here www.cirrus.com/en/pubs/manual/ep73xx_um-f.pdf
> But I am doubt if you find more.
so do it in C anyway if someone want diferent tehy modify the C it's too much
dangerous otherwise
Best Regards,
J.
>
> Thanks!
>
> ---
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
next prev parent reply other threads:[~2013-02-13 13:37 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-13 11:41 [PATCH v2 1/9] ARM: clps711x: Rework lowlevel initialization code Alexander Shiyan
2013-02-13 11:41 ` [PATCH v2 2/9] ARM: clps711x: Move basic lowlevel initialization in common CLPS711X location Alexander Shiyan
2013-02-13 11:41 ` [PATCH v2 3/9] ARM: clps711x: Adds config option for CPU PLL multiplier Alexander Shiyan
2013-02-13 12:02 ` Jean-Christophe PLAGNIOL-VILLARD
2013-02-13 12:23 ` Re[2]: " Alexander Shiyan
2013-02-13 13:36 ` Jean-Christophe PLAGNIOL-VILLARD [this message]
2013-02-13 17:06 ` Sascha Hauer
2013-02-13 17:20 ` Re[2]: " Alexander Shiyan
2013-02-13 17:40 ` Sascha Hauer
2013-02-13 18:01 ` Jean-Christophe PLAGNIOL-VILLARD
2013-02-13 18:06 ` Re[2]: " Alexander Shiyan
2013-02-13 11:41 ` [PATCH v2 4/9] ARM: clps711x: Remove unused "start" declaration from reset.c Alexander Shiyan
2013-02-13 11:41 ` [PATCH v2 5/9] ARM: clps711x: Mark private functions that not will be used outside as static Alexander Shiyan
2013-02-13 11:41 ` [PATCH v2 6/9] ARM: clep7212: Fix NULL pointer exception if MMU is enabled Alexander Shiyan
2013-02-13 11:41 ` [PATCH v2 7/9] ARM: clps711x: Move memory initialization in common CLPS711X location Alexander Shiyan
2013-02-13 11:41 ` [PATCH v2 8/9] ARM: clep7212: Update default environment Alexander Shiyan
2013-02-13 11:41 ` [PATCH v2 9/9] ARM: clps711x: Update defconfig Alexander Shiyan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130213133612.GN19322@game.jcrosoft.org \
--to=plagnioj@jcrosoft.com \
--cc=barebox@lists.infradead.org \
--cc=shc_work@mail.ru \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox