We do not enable scatter-gather mode in the TMC-ETR by default to prevent malfunctioning of systems where the ETR may not be properly connected to the memory subsystem to allow for simultaneous READ/WRITE transactions when used in SG mode. Instead we whitelist the platforms where we know that it is safe to use the mode.
All revisions of Juno have a proper ETR connection and hence white list them. Cc: Mathieu Poirier <[email protected]> Cc: Mike Leach <[email protected]> Cc: Sudeep Holla <[email protected]> Cc: Liviu Dudau <[email protected]> Cc: Lorenzo Pierlisi <[email protected]> Signed-off-by: Suzuki K Poulose <[email protected]> --- arch/arm64/boot/dts/arm/juno-base.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/arm/juno-base.dtsi b/arch/arm64/boot/dts/arm/juno-base.dtsi index ce56a4a..3596e5d 100644 --- a/arch/arm64/boot/dts/arm/juno-base.dtsi +++ b/arch/arm64/boot/dts/arm/juno-base.dtsi @@ -199,6 +199,7 @@ clocks = <&soc_smc50mhz>; clock-names = "apb_pclk"; power-domains = <&scpi_devpd 0>; + arm,scatter-gather; port { etr_in_port: endpoint { slave-mode; -- 2.7.4
