[PATCH] [RFC] ARM: imx: add smp support for imx7d

[Fabio Estevam]

On Fri, Oct 9, 2020 at 9:29 PM Laurent Pinchart
<laurent.pinchart at ideasonboard.com> wrote:

> I side with Marek and Jan on this. While PSCI is mandatory for ARM64
> platforms (whether that's a good or bad thing is out of scope here),
> there's no such requirement for ARMv7. Unless there was a decision to
> migrate the whole or ARMv7 to PSCI, I see no reason to not merge this
> patch.

Besides bringup the second core, another positive aspect of this patch
is that it allows us to use CAAM on imx7d:

[    3.829002] caam 30900000.crypto: Instantiated RNG4 SH0
[    3.888407] caam 30900000.crypto: Instantiated RNG4 SH1
[    3.893810] caam 30900000.crypto: device ID = 0x0a16030000000000 (Era 8)
[    3.900684] caam 30900000.crypto: job rings = 3, qi = 0

Without this patch the CAAM driver failed:

[    3.123690] caam 30900000.caam: Entropy delay = 3200
[    3.160149] caam 30900000.caam: failed to acquire DECO 0
[    3.165563] caam 30900000.caam: failed to instantiate RNG

Tested-by: Fabio Estevam <festevam at gmail.com>