[U-Boot] [PATCH v3 2/2] ls102xa: Fix reset hang

[Tom Rini]

On Sat, Oct 03, 2015 at 02:21:00PM -0300, Fabio Estevam wrote:

> From: Fabio Estevam <fabio.estevam at freescale.com>
> 
> Since commit 623d96e89aca6("imx: wdog: correct wcr register settings")
> issuing a 'reset' command causes the system to hang.
> 
> Unlike i.MX and Vybrid, the watchdog controller on LS102x is big-endian.
> 
> This means that the watchdog on LS1021 has been working by accident as
> it does not use the big-endian accessors in drivers/watchdog/imx_watchdog.c.
> Commit 623d96e89aca6("imx: wdog: correct wcr register settings") only
> revelead the endianness problem on LS102x.
> 
> In order to fix the reset hang, introduce a reset_cpu() implementation that 
> is specific for ls102x, which accesses the watchdog WCR register in big-endian
> format. All that is required to reset LS102x is to clear the SRS bit.
> 
> This approach is a temporary workaround to avoid a regression for LS102x
> in the 2015.10 release. The proper fix is to make the watchdog driver 
> endian-aware, so that it can work for i.MX, Vybrid and LS102x.
> 
> Reported-by: Sinan Akman <sinan at writeme.com>
> Tested-by: Sinan Akman <sinan at writeme.com>
> Reviewed-by: Wolfgang Denk <wd at denx.de>
> Signed-off-by: Fabio Estevam <fabio.estevam at freescale.com>

Applied to u-boot/master, thanks!

-- 
Tom
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