On Tue, 2019-07-23 at 08:35 -0600, Rob Herring wrote: > On Mon, Jul 22, 2019 at 8:21 PM Neal Liu <neal.liu@xxxxxxxxxxxx> wrote: > > > > Please don't top post to lists. > > > Dear Rob, > > You can check my driver for detail: > > http://patchwork.kernel.org/patch/11012475/ or patchset 3/3 > > I could, or you could just answer my question. > > > > > This driver is registered as hardware random number generator, and > > combines with rng-core. > > We want to add one rng hw based on the dts. Is this proper or do you > > have other suggestion to meet this requirement? > > It depends. There doesn't appear to be any resource configuration, so > why does it need to be in DT. DT is not the only way instantiate > drivers. > > Rob This hwrng is only supported on some chipsets. It needs DT to identify which platform is supported or not. Is there any better idea to meet this requirement? Neal > > > > Thanks > > > > > > On Tue, 2019-07-23 at 01:13 +0800, Rob Herring wrote: > > > On Mon, Jun 24, 2019 at 03:24:11PM +0800, Neal Liu wrote: > > > > Document the binding used by the MediaTek ARMv8 SoCs random > > > > number generator with TrustZone enabled. > > > > > > > > Signed-off-by: Neal Liu <neal.liu@xxxxxxxxxxxx> > > > > --- > > > > .../devicetree/bindings/rng/mtk-sec-rng.txt | 10 ++++++++++ > > > > 1 file changed, 10 insertions(+) > > > > create mode 100644 Documentation/devicetree/bindings/rng/mtk-sec-rng.txt > > > > > > > > diff --git a/Documentation/devicetree/bindings/rng/mtk-sec-rng.txt b/Documentation/devicetree/bindings/rng/mtk-sec-rng.txt > > > > new file mode 100644 > > > > index 0000000..c04ce15 > > > > --- /dev/null > > > > +++ b/Documentation/devicetree/bindings/rng/mtk-sec-rng.txt > > > > @@ -0,0 +1,10 @@ > > > > +MediaTek random number generator with TrustZone enabled > > > > + > > > > +Required properties: > > > > +- compatible : Should be "mediatek,mtk-sec-rng" > > > > > > What's the interface to access this? > > > > > > A node with a 'compatible' and nothing else is a sign of something that > > > a parent device should instantiate and doesn't need to be in DT. IOW, > > > what do complete bindings for firmware functions look like? > > > > > > > + > > > > +Example: > > > > + > > > > +hwrng: hwrng { > > > > + compatible = "mediatek,mtk-sec-rng"; > > > > +} > > > > -- > > > > 1.7.9.5 > > > > > > > > > > _______________________________________________ > > > Linux-mediatek mailing list > > > Linux-mediatek@xxxxxxxxxxxxxxxxxxx > > > http://lists.infradead.org/mailman/listinfo/linux-mediatek > > > >
