linux-kernel - Re: [PATCH 6/8] ARM: mvebu: enable SDHCI card detection using DAT3 pin on A388-GP

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Message-ID: <20151006162334.GB3557@lunn.ch>
Date:	Tue, 6 Oct 2015 18:23:34 +0200
From:	Andrew Lunn <andrew@...n.ch>
To:	Marcin Wojtas <mw@...ihalf.com>
Cc:	linux-kernel@...r.kernel.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Jason Cooper <jason@...edaemon.net>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Gregory Clément 
	<gregory.clement@...e-electrons.com>, nadavh@...vell.com,
	Lior Amsalem <alior@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>,
	Grzegorz Jaszczyk <jaz@...ihalf.com>
Subject: Re: [PATCH 6/8] ARM: mvebu: enable SDHCI card detection using DAT3
 pin on A388-GP

> We have three options here:
> - leave GPIO-based card detection and see if in future anyone
> complains about not working detection
> - switch to DAT3 detection - yes you're right, that it is a regression
> for all boards < 1.5
> - enable SW polling for detection ("broken-cd") which should satisfy
> all kind of boards

Then i would suggest either broken-cd, or two .dtb blobs and good
comments in the dts files about how to identify the boards and what
happens if you run the wrong DTB blob.

     Andrew
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