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

[Geert Uytterhoeven]

Hi Prabhakar,

On Wed, 26 Aug 2026 at 19:29, Lad, Prabhakar <prabhakar.csengg@xxxxxxxxx> wrote:
> On Wed, Aug 26, 2026 at 2:47 PM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
> > 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?

Exactly. But as you recommend flashwriter, and the two XSPI instances
should be consistent, I'll just take the patch.

Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
i.e. will queue in renesas-devel for v7.4.

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