| Message ID | 1560162984-26104-3-git-send-email-neal.liu@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | MediaTek Security random number generator support | expand |
On Mon, Jun 10, 2019 at 06:36:23PM +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@mediatek.com> > --- > Documentation/devicetree/bindings/rng/mtk-rng.txt | 15 ++++++++++++--- > 1 file changed, 12 insertions(+), 3 deletions(-) > > diff --git a/Documentation/devicetree/bindings/rng/mtk-rng.txt b/Documentation/devicetree/bindings/rng/mtk-rng.txt > index 2bc89f1..fb3dd59 100644 > --- a/Documentation/devicetree/bindings/rng/mtk-rng.txt > +++ b/Documentation/devicetree/bindings/rng/mtk-rng.txt > @@ -3,9 +3,13 @@ found in MediaTek SoC family > > Required properties: > - compatible : Should be > - "mediatek,mt7622-rng", "mediatek,mt7623-rng" : for MT7622 > - "mediatek,mt7629-rng", "mediatek,mt7623-rng" : for MT7629 > - "mediatek,mt7623-rng" : for MT7623 > + "mediatek,mt7622-rng", "mediatek,mt7623-rng" for MT7622 > + "mediatek,mt7629-rng", "mediatek,mt7623-rng" for MT7629 > + "mediatek,mt7623-rng" for MT7623 > + "mediatek,mtk-sec-rng" for MediaTek ARMv8 SoCs with > + security RNG Is there any commonality with the prior h/w? If not, make this a separate binding doc. > + > +Optional properties: > - clocks : list of clock specifiers, corresponding to > entries in clock-names property; > - clock-names : Should contain "rng" entries; > @@ -19,3 +23,8 @@ rng: rng@1020f000 { > clocks = <&infracfg CLK_INFRA_TRNG>; > clock-names = "rng"; > }; > + > +/* secure RNG */ > +hwrng: hwrng { > + compatible = "mediatek,mtk-sec-rng"; How does one access this? Seems like this should be part of a node for firmware? What about other functions? > +}; > -- > 1.7.9.5 >
On Tue, 2019-06-11 at 16:53 -0600, Rob Herring wrote: > On Mon, Jun 10, 2019 at 06:36:23PM +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@mediatek.com> > > --- > > Documentation/devicetree/bindings/rng/mtk-rng.txt | 15 ++++++++++++--- > > 1 file changed, 12 insertions(+), 3 deletions(-) > > > > diff --git a/Documentation/devicetree/bindings/rng/mtk-rng.txt b/Documentation/devicetree/bindings/rng/mtk-rng.txt > > index 2bc89f1..fb3dd59 100644 > > --- a/Documentation/devicetree/bindings/rng/mtk-rng.txt > > +++ b/Documentation/devicetree/bindings/rng/mtk-rng.txt > > @@ -3,9 +3,13 @@ found in MediaTek SoC family > > > > Required properties: > > - compatible : Should be > > - "mediatek,mt7622-rng", "mediatek,mt7623-rng" : for MT7622 > > - "mediatek,mt7629-rng", "mediatek,mt7623-rng" : for MT7629 > > - "mediatek,mt7623-rng" : for MT7623 > > + "mediatek,mt7622-rng", "mediatek,mt7623-rng" for MT7622 > > + "mediatek,mt7629-rng", "mediatek,mt7623-rng" for MT7629 > > + "mediatek,mt7623-rng" for MT7623 > > + "mediatek,mtk-sec-rng" for MediaTek ARMv8 SoCs with > > + security RNG > > Is there any commonality with the prior h/w? If not, make this a > separate binding doc. There are less common with the prior h/w... I had been thinking about make new binding doc. Since your suggestion, I'll make one. > > > + > > +Optional properties: > > - clocks : list of clock specifiers, corresponding to > > entries in clock-names property; > > - clock-names : Should contain "rng" entries; > > @@ -19,3 +23,8 @@ rng: rng@1020f000 { > > clocks = <&infracfg CLK_INFRA_TRNG>; > > clock-names = "rng"; > > }; > > + > > +/* secure RNG */ > > +hwrng: hwrng { > > + compatible = "mediatek,mtk-sec-rng"; > > How does one access this? Seems like this should be part of a node for > firmware? What about other functions? Yes, We move all hw register & clock control access to the ATF by smc. > > > +}; > > -- > > 1.7.9.5 > >
diff --git a/Documentation/devicetree/bindings/rng/mtk-rng.txt b/Documentation/devicetree/bindings/rng/mtk-rng.txt index 2bc89f1..fb3dd59 100644 --- a/Documentation/devicetree/bindings/rng/mtk-rng.txt +++ b/Documentation/devicetree/bindings/rng/mtk-rng.txt @@ -3,9 +3,13 @@ found in MediaTek SoC family Required properties: - compatible : Should be - "mediatek,mt7622-rng", "mediatek,mt7623-rng" : for MT7622 - "mediatek,mt7629-rng", "mediatek,mt7623-rng" : for MT7629 - "mediatek,mt7623-rng" : for MT7623 + "mediatek,mt7622-rng", "mediatek,mt7623-rng" for MT7622 + "mediatek,mt7629-rng", "mediatek,mt7623-rng" for MT7629 + "mediatek,mt7623-rng" for MT7623 + "mediatek,mtk-sec-rng" for MediaTek ARMv8 SoCs with + security RNG + +Optional properties: - clocks : list of clock specifiers, corresponding to entries in clock-names property; - clock-names : Should contain "rng" entries; @@ -19,3 +23,8 @@ rng: rng@1020f000 { clocks = <&infracfg CLK_INFRA_TRNG>; clock-names = "rng"; }; + +/* secure RNG */ +hwrng: hwrng { + compatible = "mediatek,mtk-sec-rng"; +};
Document the binding used by the MediaTek ARMv8 SoCs random number generator with TrustZone enabled. Signed-off-by: Neal Liu <neal.liu@mediatek.com> --- Documentation/devicetree/bindings/rng/mtk-rng.txt | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-)