[U-Boot] [PATCH v3 2/2] armv7: ls102xa: Disable QE before enter deep sleep

[Ran Wang]

Hi York,

> -----Original Message-----
> From: York Sun
> Sent: Friday, September 28, 2018 00:53
> To: Ran Wang <ran.wang_1 at nxp.com>; Alison Wang <alison.wang at nxp.com>
> Cc: Qiang Zhao <qiang.zhao at nxp.com>; u-boot at lists.denx.de
> Subject: Re: [PATCH v3 2/2] armv7: ls102xa: Disable QE before enter deep
> sleep
> 
> On 09/25/2018 10:46 PM, Ran Wang wrote:
> > Otherwise system will hang after executing wfi.
> 
> This patch doesn't depend on the first patch, does it? 
Yes

>In another word, this
> issue exists before, we didn't notice before because no one put the system
> on deep sleep. Is that right?

Yes, I think so, I found this issue only when try to enable deep sleep feature.
Per my observation, this problem will block system enter deep sleep every time.
Furthermore, this QE disabling here will not impact QE function when system wakeup
due to there will be a warm reset actually. 

However, I found another issue that QE re-initialization will randomly cause system
hang when resume (actually it even randomly happen in normal boot, too), that's
why I decide to move CONFIG_U_QE to Kconfig to allow user get chance to workaround
them.

Regards,
Ran

> York