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Date: Tue, 19 Sep 2017 15:09:20 +0100 From: Mark Rutland <mark.rutland@....com> To: "Andrew F. Davis" <afd@...com> Cc: Rob Herring <robh+dt@...nel.org>, Russell King <linux@...linux.org.uk>, Jens Wiklander <jens.wiklander@...aro.org>, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.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 03:50:05PM -0500, Andrew F. Davis 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 ... which are what, exactly? Specified where? As Rob said, this should really have a new compat string. Thanks, Mark. > > > Example: > diff --git a/drivers/tee/optee/core.c b/drivers/tee/optee/core.c > index 7952357df9c8..dfa9de590d98 100644 > --- a/drivers/tee/optee/core.c > +++ b/drivers/tee/optee/core.c > @@ -441,6 +441,8 @@ static optee_invoke_fn *get_invoke_func(struct device_node *np) > return optee_smccc_hvc; > else if (!strcmp("smc", method)) > return optee_smccc_smc; > + else if (!strcmp("ti-smc", method)) > + return arm_ti_smccc_smc; > > pr_warn("invalid \"method\" property: %s\n", method); > return ERR_PTR(-EINVAL); > -- > 2.14.1 >
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