linux-kernel - Re: [PATCH v7 3/5] misc: fuse: Add efuse driver for Tegra

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Date:	Wed, 11 Jun 2014 15:47:31 +0300
From:	Mikko Perttunen <mperttunen@...dia.com>
To:	Peter De Schrijver <pdeschrijver@...dia.com>
CC:	Russell King <linux@....linux.org.uk>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Wolfram Sang <wsa@...-dreams.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v7 3/5] misc: fuse: Add efuse driver for Tegra

On 05/06/14 16:09, Peter De Schrijver wrote:
...
> +int tegra_fuse_readl(u32 offset, u32 *val)
> +{
> +       if (!fuse_readl)
> +               return -ENXIO;
> +
> +       *val = fuse_readl(offset);
> +
> +       return 0;
> +}
> +

-EPROBE_DEFER would be a better error value, so that drivers can work 
even if they are initially probed before the fuse driver. Of course, if 
the fuse initialization is moved into machine init then this is a non-issue.
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