On Thu, 30 May 2013 20:04:48 +0400, Sergey Yanovich <ynv...@gmail.com>
wrote:
> From f1cd048a066b249082752a96abce7d33a0cd4ea3 Mon Sep 17 00:00:00 2001
> From: Sergey Yanovich <ynv...@gmail.com>
> Date: Tue, 21 May 2013 03:06:31 +0400
> Subject: [PATCH] rtc-ds1302: handle write protection
>
> This chip has a control register and can prevent altering saved clock.
> Without this patch we could have:
> ----8<----
> (arm)root@pac14:~# date
> Tue May 21 03:08:27 MSK 2013
> (arm)root@pac14:~# /etc/init.d/hwclock.sh show
> Tue May 21 11:13:58 2013 -0.067322 seconds
> (arm)root@pac14:~# /etc/init.d/hwclock.sh stop
> [info] Saving the system clock.
> [info] Hardware Clock updated to Tue May 21 03:09:01 MSK 2013.
> (arm)root@pac14:~# /etc/init.d/hwclock.sh show
> Tue May 21 11:14:15 2013 -0.624272 seconds
> ----8<----
>
> The patch enables write access to rtc before the driver tries to write
time
> and re-disables when time data is written.
>
> Signed-off-by: Sergey Yanovich <ynv...@gmail.com>
FWIW,
Acked-by: Marc Zyngier <m...@misterjones.org>
M.
--
Who you jivin' with that Cosmik Debris?
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