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Date: Tue, 19 Sep 2017 08:36:07 -0500 From: Rob Herring <robh+dt@...nel.org> To: "Andrew F. Davis" <afd@...com> Cc: Mark Rutland <mark.rutland@....com>, Russell King <linux@...linux.org.uk>, Jens Wiklander <jens.wiklander@...aro.org>, "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 2/2] tee: optee: allow selection of ti-smc as a calling method On Mon, Sep 18, 2017 at 3:50 PM, Andrew F. Davis <afd@...com> wrote: > On TI platforms OP-TEE must be called using a modified SMC call, > allow the selection of this though DT. > > Signed-off-by: Andrew F. Davis <afd@...com> > --- > Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.txt | 2 ++ > drivers/tee/optee/core.c | 2 ++ > 2 files changed, 4 insertions(+) > > diff --git a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.txt b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.txt > index d38834c67dff..a3275ecdf186 100644 > --- a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.txt > +++ b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.txt > @@ -20,6 +20,8 @@ the reference implementation maintained by Linaro. > "hvc" : HVC #0, with the register assignments specified > in drivers/tee/optee/optee_smc.h > > + "ti-smc" : Similar to "smc" with TI specific register > + adjustments Sigh, really? IMO, this should be determined from the compatible string. Then the next TI (or any vendor) specific thing can be handled without a DT change. Maybe some day we'll figure out that not just h/w needs to be probe-able, but all the firmware pieces do too. Rob
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