linux-kernel - Re: [RFC PATCH] slimbus: Linux driver framework for SLIMbus.

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Message-ID: <CACRpkdbSVF1FxpuocoXkDFH3vDQc4OoTwjU+9iqj0=vVs3R3dQ@mail.gmail.com>
Date:	Wed, 17 Aug 2011 15:17:57 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Arnd Bergmann <arnd@...db.de>,
	Kenneth Heitke <kheitke@...eaurora.org>,
	sdharia@...eaurora.org, David Brown <davidb@...eaurora.org>,
	bryanh@...eaurora.org, linux-arm-msm@...r.kernel.org,
	rdunlap@...otime.net, rmk+kernel@....linux.org.uk,
	john.stultz@...aro.org, akpm@...ux-foundation.org, ohad@...ery.com,
	gregkh@...e.de, stefanr@...6.in-berlin.de, lethal@...ux-sh.org,
	linville@...driver.com, zajec5@...il.com,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] slimbus: Linux driver framework for SLIMbus.

On Wed, Aug 17, 2011 at 3:04 PM, Mark Brown
<broonie@...nsource.wolfsonmicro.com> wrote:

> The device driver will know what power supplies and other signals the
> device has, and it will know how and when to use them. (...)

And I guess there is nothing in the spec claiming that all devices
be powered-on when you boot?

In that case the devices living on that bus will not respond to
discovery messages until they are powered on, will they?

Or is there some ingenious self-powered shift register
logic doing these responses?

Yours,
Linus Walleij
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