[PATCH 2/2] ARM: tegra: Enable PSCI support for Tegra210 and Tegra186

[Stephen Warren]

On 6/18/20 5:54 AM, Jon Hunter wrote:
> The PSCI nodes are currently not populated for the Tegra210 and Tegra186
> devices. This prevents the PSCI driver from being able to identify the
> PSCI method used by these devices and causes the probe of the PSCI
> driver to fail.
> 
> Since commit 81ea00838c68 ("efi_loader: PSCI reset and shutdown") was
> added, which moves the PSCI EFI system reset handler into the PSCI
> driver, this has prevented the EFI system reset from working for
> Tegra210 and Tegra186. Therefore, populating these nodes is necessary
> to fix the EFI system reset for Tegra210 and Tegra186.

I'm not sure that these platforms have *always* had a PSCI
implementation, so this is a slight assumption. Ideally, the FW should
add this to the DT and pass it to U-Boot... However, since all recentish
FW builds do implement PSCI, and the DT is hard-coded into U-Boot rather
than provided by the earlier FW, this change is probably just fine.