Re: [PATCH] arm64: dts: renesas: rzt2h-n2h-evk: Mark XSPI1 boot partitions read-only

[Lad, Prabhakar]

 Hi Geert,

On Wed, Aug 26, 2026 at 2:47 PM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
>
> Hi Prabhakar,
>
> On Wed, 26 Aug 2026 at 13:28, Prabhakar <prabhakar.csengg@xxxxxxxxx> wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> >
> > Mark the BL2 and FIP partitions on XSPI1 as read-only to prevent them
> > from being modified through the MTD partition interface.
> >
> > The corresponding boot partitions on XSPI0 are already marked
> > read-only.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
>
> Thanks for your patch!
>
> > --- a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
> > +++ b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
> > @@ -825,11 +825,13 @@ partitions {
> >                         partition@0 {
> >                                 label = "bl2-1";
> >                                 reg = <0x00000000 0x00060000>;
> > +                               read-only;
> >                         };
> >
> >                         partition@60000 {
> >                                 label = "fip-1";
> >                                 reg = <0x00060000 0x007a0000>;
> > +                               read-only;
> >                         };
> >
> >                         partition@800000 {
>
> Makes sense. However, what is the recommended interface to update
> the bootloader in these partitions?
>
The BSP supports updates via the flashwriter tool; there is no
recommended way as such. Are you hinting to allow this to be done via
Linux?

Cheers,
Prabhakar


> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds