arm64: dts: mediatek: asurada: Enable SCP

Enable support for the SCP co-processor present on MT8192. It is used
as part of the video encoding and decoding processes.

A region of memory is carved out for its use, and remoteproc setup for
communication with the ChromeOS EC.

Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20220629155956.1138955-19-nfraprado@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

diff --git a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
index 7b89f6e..a5625b3 100644 (file)
--- a/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192-asurada.dtsi
@@ -105,6 +105,12 @@
                #size-cells = <2>;
                ranges;
 
+               scp_mem_reserved: scp@50000000 {
+                       compatible = "shared-dma-pool";
+                       reg = <0 0x50000000 0 0x2900000>;
+                       no-map;
+               };
+
                wifi_restricted_dma_region: wifi@c0000000 {
                        compatible = "restricted-dma-pool";
                        reg = <0 0xc0000000 0 0x4000000>;
@@ -680,6 +686,12 @@
                };
        };
 
+       scp_pins: scp-pins {
+               pins-vreq-vao {
+                       pinmux = <PINMUX_GPIO195__FUNC_SCP_VREQ_VAO>;
+               };
+       };
+
        spi1_pins: spi1-default-pins {
                pins-cs-mosi-clk {
                        pinmux = <PINMUX_GPIO157__FUNC_SPI1_A_CSB>,
@@ -735,6 +747,20 @@
        interrupts-extended = <&pio 214 IRQ_TYPE_LEVEL_HIGH>;
 };
 
+&scp {
+       status = "okay";
+
+       firmware-name = "mediatek/mt8192/scp.img";
+       memory-region = <&scp_mem_reserved>;
+       pinctrl-names = "default";
+       pinctrl-0 = <&scp_pins>;
+
+       cros-ec {
+               compatible = "google,cros-ec-rpmsg";
+               mediatek,rpmsg-name = "cros-ec-rpmsg";
+       };
+};
+
 &spi1 {
        status = "okay";