Re: [PATCH] arm64: dts: pinephone: Add pstore support for PinePhone A64

[Andrey Skvortsov <andrej.skvortzov@gmail.com>]

Hi Pavel,

On 23-08-21 18:08, Pavel Machek wrote:
> Hi!
> 
> > This patch reserves some memory in the DTS and sets up a
> > pstore device tree node to enable pstore support.
> > 
> > Signed-off-by: Andrey Skvortsov <andrej.skvortzov@gmail.com>
> > 
> > Gbp-Pq: Topic pinephone
> > Gbp-Pq: Name 0161-arm64-dts-pinephone-Add-pstore-support-for-PinePhone.patch
> > ---
> >  .../boot/dts/allwinner/sun50i-a64-pinephone.dtsi | 16 ++++++++++++++++
> >  1 file changed, 16 insertions(+)
> > 
> > diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> > index 87847116ab6d..84f9410b0b70 100644
> > --- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> > +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
> > @@ -19,6 +19,22 @@ aliases {
> >  		serial0 = &uart0;
> >  	};
> >  
> > +	reserved-memory {
> > +		#address-cells = <1>;
> > +		#size-cells = <1>;
> > +		ranges;
> > +
> > +		pstore_mem: ramoops@61000000 {
> > +			compatible = "ramoops";
> > +			reg = <0x61000000 0x100000>;
> > +			record-size = <0x20000>;
> > +			console-size = <0x20000>;
> > +			ftrace-size = <0x20000>;
> > +			pmsg-size = <0x20000>;
> > +			ecc-size = <16>;
> > +		};
> > +	};
> 
> dts is supposed to be for hardware description, but this is really policy decision.
> 
> Should we have something like "any dram is suitable for pstore"....?
Thanks for the review. I'll add into commit message more details why
this address was picked.

-- 
Best regards,
Andrey Skvortsov