Re: [PATCH] ARM: dts: imx6dl-yapp4: Do not allow PM to switch PU regulator off on Q/QP

[Shawn Guo]

On Tue, Oct 04, 2022 at 05:39:20PM +0200, Petr Benes wrote:
> Fix our design flaw in supply voltage distribution on the Quad and QuadPlus
> based boards.
> 
> The problem is that we supply the SoC cache (VDD_CACHE_CAP) from VDD_PU
> instead of VDD_SOC. The VDD_PU internal regulator can be disabled by PM
> if VPU or GPU is not used. If that happens the system freezes. To prevent
> that configure the reg_pu regulator to be always on.
> 
> Fixes: 0de4ab81ab26 ("ARM: dts: imx6dl-yapp4: Add Y Soft IOTA Crux/Crux+ board")
> Cc: petrben@xxxxxxxxx
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Petr Benes <petr.benes@xxxxxxxxx>
> Signed-off-by: Michal Vokáč <michal.vokac@xxxxxxxxx>

Applied, thanks!