[U-Boot] [PATCH V2] imx: mx7: psci: add system reset support

[Anson Huang]

Best Regards!
Anson Huang


> -----Original Message-----
> From: Fabio Estevam [mailto:festevam at gmail.com]
> Sent: 2018-01-07 6:48 AM
> To: Anson Huang <anson.huang at nxp.com>
> Cc: Stefano Babic <sbabic at denx.de>; Fabio Estevam
> <fabio.estevam at nxp.com>; Albert ARIBAUD <albert.u.boot at aribaud.net>;
> Christian Gmeiner <christian.gmeiner at gmail.com>; Peng Fan
> <peng.fan at nxp.com>; U-Boot-Denx <u-boot at lists.denx.de>
> Subject: Re: [U-Boot] [PATCH V2] imx: mx7: psci: add system reset support
> 
> Hi Anson,
> 
> On Fri, Jan 5, 2018 at 4:25 AM, Anson Huang <anson.huang at nxp.com> wrote:
> 
> > Thanks for the comments, the current reboot command works is just
> > because wdog driver is enabled and when system reboot, the reboot
> > notification callback in wdog driver will do reset. But if wdog is
> > disabled in dtb, the reboot command will fail.
> >
> > As now we use PSCI, the reboot operation will eventually call into
> > u-boot's psci reset callback, we should support this feature, the
> > reboot feature in Linux kernel should NOT depends on wdog's existence.
> 
> Ok, but what about erratum e10574 (Watchdog: A watchdog timeout or
> software trigger will not reset the SOC)?
> 
> According to this erratum WDOG_B pin needs to generate a system power on.

Correct, we need to enable WDA to toggle WDOG_B for reset, thanks.
Will send a V3 patch set.

Anson.