arm64: dts: qcom: sa8775p: add a dedicated memory carveout for TZ

Add a 20MB reserved memory region for use by SCM calls.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/r/20240527-shm-bridge-v10-15-ce7afaa58d3a@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/arch/arm64/boot/dts/qcom/sa8775p.dtsi b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
index 3808fafd6bec56e9825f5c7aaa3af4fa280ee8b8..23f1b2e5e62471396d8dd5eaf5ecb23e01a5e458 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sa8775p.dtsi
+++ b/arch/arm64/boot/dts/qcom/sa8775p.dtsi
@@ -221,6 +221,7 @@
        firmware {
                scm {
                        compatible = "qcom,scm-sa8775p", "qcom,scm";
+                       memory-region = <&tz_ffi_mem>;
                };
        };
 
@@ -431,6 +432,12 @@
                        no-map;
                };
 
+               tz_ffi_mem: tz-ffi@91c00000 {
+                       compatible = "shared-dma-pool";
+                       reg = <0x0 0x91c00000 0x0 0x1400000>;
+                       no-map;
+               };
+
                lpass_machine_learning_mem: lpass-machine-learning@93b00000 {
                        reg = <0x0 0x93b00000 0x0 0xf00000>;
                        no-map;