Subject: Re: [PATCH 3/4] mfd: max77620: override PSCI poweroff handler on Pixel C

From: Thierry Reding <[email-masked]>
Date: Thu, 21 May 2026 09:52:03 +0200

On Thu, May 14, 2026 at 04:47:21PM +0200, Diogo Ivo wrote:
> On Pixel C, shutdown must be handled by the MAX77620 PMIC rather
> than the PSCI SYSTEM_OFF call, whose firmware implementation is:
> 
> __dead2 void tegra_system_off(void)
> {
>         ERROR("Tegra System Off: operation not handled.\n");
>         panic();
> }

Ugh... sounds very familiar. We have similar stub implementations on
Jetson TX1 and/or Nano, if I remember correctly. Luckily newer platforms
seem to have proper implementations for these.

Thanks for doing this. I might want to take inspiration from this for
these older Jetson platforms.

Thierry