Hello Neil,
On Fri, Mar 24, 2023 at 11:11:02AM +0100, neil.armstrong@xxxxxxxxxx wrote:
> Hi,
>
> On 23/03/2023 19:55, Dmitry Rokosov wrote:
> > Before, meson power secure controller was a child of secure monitor node.
> > But secure monitor isn't the bus in terms of device tree subsystem, so
> > of_platform initialization code doesn't populate its children
> > (of_platform_default_populate() API).
> >
> > Therefore in the current device tree meson power secure controller isn't
> > probed at all.
> >
> > If we place meson power secure controller and secure monitor nodes under
> > '/firmware', they will be populated automatically from of_platform
> > initialization.
> >
> > Fixes: 04dd0b6584cd ("arm64: dts: meson: a1: add secure power domain controller")
> > Signed-off-by: Dmitry Rokosov <ddrokosov@xxxxxxxxxxxxxx>
> > ---
> > arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 6 ++++--
> > 1 file changed, 4 insertions(+), 2 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> > index 77023a29b6e7..44c651254dc5 100644
> > --- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> > +++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
> > @@ -72,8 +72,10 @@ linux,cma {
> > };
> > };
> > - sm: secure-monitor {
> > - compatible = "amlogic,meson-gxbb-sm";
> > + firmware {
> > + sm: secure-monitor {
> > + compatible = "amlogic,meson-gxbb-sm";
> > + };
> > pwrc: power-controller {
> > compatible = "amlogic,meson-a1-pwrc";
>
> The amlogic,meson-gxbb-sm bindings says the power-controller node should be
> a subnode of secure-monitor, so instead please fix the sm driver by calling:
>
> of_platform_populate(dev->of_node, NULL, NULL, dev);
This is second option which I was thinking of. I supposing this API is
used from SoC platform drivers and bus drivers only.
But if this approach is okay, I will rework the patch to
of_platform_populate().
Thank you for pointing out it.
--
Thank you,
Dmitry
