linux-kernel - Re: [RFT PATCH 1/3] usb: misc: usb3503: Fix HUB mode after bootloader initialization

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Message-ID: <20160504182555.GE6292@sirena.org.uk>
Date:	Wed, 4 May 2016 19:25:55 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
Cc:	Rob Herring <robh@...nel.org>, Kukjin Kim <kgene@...nel.org>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-usb@...r.kernel.org,
	linux.amoon@...il.com, tjakobi@...h.uni-bielefeld.de,
	m.szyprowski@...sung.com, hverkuil@...all.nl,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	ulf.hansson@...aro.org
Subject: Re: [RFT PATCH 1/3] usb: misc: usb3503: Fix HUB mode after
 bootloader initialization

On Wed, May 04, 2016 at 02:01:57PM +0200, Krzysztof Kozlowski wrote:

> This looks like pwrseq for MMC devices so the idea is to:
> 1. Move drivers/mmc/core/pwrseq* to separate directory
> (drivers/power/pwrseq ?)
> 2. Add support for pwrseq to USB core,
> 3. Add new pwrseq driver (or extend existing one): toggling the regulator.
> 4. Add pwrseq phandle to the DT node of USB hub (to the binding
> mentioned by Rob?).

> Does it look sensible?

It certainly seems like a similar problem space, USB seems very much
like MMC in both the spec and the way it tends to get used.

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