linux-kernel - Re: [PATCH 05/11] spi/pxa2xx: make clock rate configurable from platform data

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Message-ID: <20130110100012.GK13897@intel.com>
Date:	Thu, 10 Jan 2013 12:00:13 +0200
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	linux-kernel@...r.kernel.org, grant.likely@...retlab.ca,
	linus.walleij@...aro.org, eric.y.miao@...il.com,
	linux@....linux.org.uk, haojian.zhuang@...il.com,
	chao.bi@...el.com, "H. Peter Anvin" <hpa@...ux.intel.com>
Subject: Re: [PATCH 05/11] spi/pxa2xx: make clock rate configurable from
 platform data

On Wed, Jan 09, 2013 at 10:52:12PM +0100, Rafael J. Wysocki wrote:
> 
> > Other problem is that this setup needs manual maintenance as we can't get
> > the configuration from ACPI.
> 
> So we just happen to know what the rate is supposed to be?  What's the source
> of that information?

We get it from the LPSS specs. On lynxpoint the LPSS clock is 100MHz.
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