Hi Prabhakar,
CC Marek
On Fri, Oct 23, 2020 at 12:03 PM Lad, Prabhakar
<prabhakar.csengg@xxxxxxxxx> wrote:
> On Fri, Oct 23, 2020 at 10:50 AM Geert Uytterhoeven
> <geert@xxxxxxxxxxxxxx> wrote:
> > On Fri, Oct 23, 2020 at 9:56 AM Lad Prabhakar
> > <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> wrote:
> > > Add optee device tree node to HiHope RZ/G2{HMN} boards.
> > >
> > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> > > Reviewed-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> >
> > Thanks for your patch!
> >
> > > --- a/arch/arm64/boot/dts/renesas/hihope-common.dtsi
> > > +++ b/arch/arm64/boot/dts/renesas/hihope-common.dtsi
> > > @@ -110,6 +110,13 @@
> > > #clock-cells = <0>;
> > > clock-frequency = <25000000>;
> > > };
> > > +
> > > + firmware {
> > > + optee {
> > > + compatible = "linaro,optee-tz";
> > > + method = "smc";
> > > + };
> > > + };
> > > };
> >
> > Should this be added to the SoC-specific .dtsi instead?
> It's a bit tricky, the reason I put in board files is due to current
> boards having optee do the same. Let me know if you want me to move
> the nodes to SoC dtsi
At least the Layerscape and K3 SoCs do have the optee node in the
SoC-specific .dtsi...
Given it needs a special TFA, it's probably safest to pass this through
the firmware stack, cfr. the memory nodes?
> > How can we test this?
> This needs a special TFA (by special I mean optee enabled
> (SPD="opteed")) and In Linux we need the below configs enabled:
>
> CONFIG_TEE=y
> CONFIG_OPTEE=y
> CONFIG_OPTEE_SHM_NUM_PRIV_PAGES=1
>
> Once Linux is booted up this exposes a optee device which can be used
> for communication. I have used optee_test [1] test-suite (xtest) to
> make sure all the tests pass (I have attached results for RZ/G2H for
> reference).
>
> [1] https://optee.readthedocs.io/en/latest/building/gits/optee_test.html
Thanks, that is very valuable information!
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
