From: shc_work@mail.ru (Alexander Shiyan)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC v2] ARM: i.MX pllv1: Implement set_rate
Date: Sat, 20 Jul 2013 16:18:01 +0400 [thread overview]
Message-ID: <20130720161801.380bb0d9db75155f5401730b@mail.ru> (raw)
In-Reply-To: <20130720115829.GD29785@pengutronix.de>
On Sat, 20 Jul 2013 13:58:29 +0200
Sascha Hauer <s.hauer@pengutronix.de> wrote:
> > > On Sat, Jul 20, 2013 at 12:29:35PM +0400, Alexander Shiyan wrote:
> > > > This patch implements frequency change for i.MX pllv1.
> > > > Selection of the values of the registers is not optimal, since is
> > > > made by simple enumeration of all possible values.
> > >
> > > You do not mention why you want to adjust the rate. Normally we've been
> > > happy with the static values from the bootloader.
> >
> > For CPUfreq.
> > Only one barrier to make it workable.
>
> Isn't it better to adjust the dividers only? I haven't made good
> experience with adjusting the PLLs.
The frequency value after booting can be quite arbitrary.
Since we define possible frequencies for the CPU (266 and 399 MHz),
I can offer as variant to use a fixed constant values for PLL.
--
Alexander Shiyan <shc_work@mail.ru>
next prev parent reply other threads:[~2013-07-20 12:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-20 8:29 [RFC v2] ARM: i.MX pllv1: Implement set_rate Alexander Shiyan
2013-07-20 11:16 ` Sascha Hauer
2013-07-20 11:31 ` Alexander Shiyan
2013-07-20 11:58 ` Sascha Hauer
2013-07-20 12:18 ` Alexander Shiyan [this message]
2013-07-21 12:37 ` Sascha Hauer
2013-07-22 15:18 ` Alexander Shiyan
2013-07-22 15:24 ` Lucas Stach
2013-07-22 15:40 ` Alexander Shiyan
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