linux-kernel - Re: [PATCH 0/4] add minimal bcm2835-sdram driver

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Message-ID: <87twi39m80.fsf@eliezer.anholt.net>
Date:	Thu, 12 May 2016 11:15:27 -0700
From:	Eric Anholt <eric@...olt.net>
To:	kernel@...tin.sperl.org, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Lee Jones <lee@...nel.org>,
	Russell King <linux@....linux.org.uk>,
	devicetree@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:	Martin Sperl <kernel@...tin.sperl.org>
Subject: Re: [PATCH 0/4] add minimal bcm2835-sdram driver

kernel@...tin.sperl.org writes:

> From: Martin Sperl <kernel@...tin.sperl.org>
>
> As the sdram clock is a critical clock to the system
> the minimal bcm2835-sdram driver claims (and enables)
> this clock and also exposes the corresponding sdram
> registers via debugfs.

I don't think this is a good solution to the problem you are trying to
work around.  You're relying on the fact that this driver gets
successfully probed before a driver that would -EPROBE_DEFER on a
sibling clock, which is not a guarantee.

Let's please continue the debugging of clock management on linux-clk.

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