[RFC PATCH] imx: imx8mm-evk/imx8mn-evk: enable sysreset driver for SPL

[Marek Vasut]

On 1/16/20 3:21 AM, Peng Fan wrote:

Hello Peng,

>> Subject: [RFC PATCH] imx: imx8mm-evk/imx8mn-evk: enable sysreset driver
>> for SPL
>>
> 
> NAK, this will not work on i.MX8MM/N.
> 
> Currently sysreset psci is enabled, however psci will not work for SPL, because
> SPL boots before BL31.

Thank you for the constructive feedback.

So basically , what we need is a real sysreset driver for iMX8MM , which
can work with bare-bones hardware interface, that is, poking some
register, correct ?

So, either you or Claudius needs to implement a driver in
drivers/sysreset, which will bind in SPL and if needed, do some writel()
into some registers to reset the board, correct ?

Because, I believe we can both agree that dumping such ad-hoc code which
implements reset in board code is not the right way, esp. nowadays with
all the DM/DT stuff in.