linux-kernel - Re: [PATCH V3 07/12] ata/sata_mv: Remove conditional compilation of clk code

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Date:	Wed, 25 Apr 2012 11:31:09 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	Lothar Wa??mann <LW@...O-electronics.de>
Cc:	Andrew Lunn <andrew@...n.ch>,
	viresh kumar <viresh.linux@...il.com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	sshtylyov@...sta.com, spear-devel@...t.st.com,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	mturquette@...aro.org, akpm@...ux-foundation.org,
	jgarzik@...hat.com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH V3 07/12] ata/sata_mv: Remove conditional compilation of
 clk code

> If an arch has HAVE_CLK enabled it must provide valid clocks (be it
> dummy clocks) for all devices it supports.

So, lets take the theoretical exaple of a unicore32 PUV3

config ARCH_PUV3
        def_bool y
        select CPU_UCV2
        select GENERIC_CLOCKEVENTS
        select HAVE_CLK
        select ARCH_REQUIRE_GPIOLIB
        select ARCH_HAS_CPUFREQ

Seems like this somewhat unknown, to me at least, architecture, also
supports PCI. So i plug in an HP Adaptec AIC8120 SATA host bus adapter
into a spare PCI slot. This uses the Marvell 88SX6041, which the
SATA_MV driver supports.

Should i expect that the unicore32 PUV3 has created a dummy clk for
this case?

Thanks
	Andrew
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