From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
Subject: Re: [PATCH v5 0/5] efuse driver for Tegra
Date: Thu, 29 May 2014 13:01:27 -0600
Message-ID: <53878407.3050409@wwwdotorg.org>
References: <1401281677-32110-1-git-send-email-pdeschrijver@nvidia.com>
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To: Peter De Schrijver <pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>, Thierry Reding <thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>, Linus Walleij <linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>, Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
List-Id: linux-tegra@vger.kernel.org

On 05/28/2014 06:54 AM, Peter De Schrijver wrote:
> This driver allows userspace to read the raw efuse data. Its userspace
> interface is modelled after the sunxi_sid driver which provides similar
> functionality for some Allwinner SoCs. It has been tested on
> Tegra20 (ventana), Tegra30 (beaverboard), Tegra114 (dalmore) and
> Tegra124 (jetson TK1).

> Changes since v4:
> 
> * Provide fallback to hardcoded 0x70000800 in case the apbmisc DT node is
>   missing. This is exactly what the current code does and prevents a system
>   crash in that case due to an invalid memory access by tegra_read_chipid()

Wouldn't it be better to simply return an error?