From: Peter De Schrijver Date: Mon, 29 May 2023 13:50:47 +0000 (+0300) Subject: dt-bindings: reserved-memory: Add support for DRAM MRQ GSCs X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e2c09648abd40834dad337f64d83b50e6776c574;p=linux.git dt-bindings: reserved-memory: Add support for DRAM MRQ GSCs Add bindings for DRAM MRQ GSC support. Co-developed-by: Stefan Kristiansson Signed-off-by: Stefan Kristiansson Signed-off-by: Peter De Schrijver Reviewed-by: Conor Dooley Signed-off-by: Thierry Reding --- diff --git a/Documentation/devicetree/bindings/reserved-memory/nvidia,tegra264-bpmp-shmem.yaml b/Documentation/devicetree/bindings/reserved-memory/nvidia,tegra264-bpmp-shmem.yaml new file mode 100644 index 0000000000000..f9b2f0fdc282f --- /dev/null +++ b/Documentation/devicetree/bindings/reserved-memory/nvidia,tegra264-bpmp-shmem.yaml @@ -0,0 +1,47 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/reserved-memory/nvidia,tegra264-bpmp-shmem.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Tegra CPU-NS - BPMP IPC reserved memory + +maintainers: + - Peter De Schrijver + +description: | + Define a memory region used for communication between CPU-NS and BPMP. + Typically this node is created by the bootloader as the physical address + has to be known to both CPU-NS and BPMP for correct IPC operation. + The memory region is defined using a child node under /reserved-memory. + The sub-node is named shmem@
. + +allOf: + - $ref: reserved-memory.yaml + +properties: + compatible: + const: nvidia,tegra264-bpmp-shmem + + reg: + description: The physical address and size of the shared SDRAM region + +unevaluatedProperties: false + +required: + - compatible + - reg + - no-map + +examples: + - | + reserved-memory { + #address-cells = <2>; + #size-cells = <2>; + dram_cpu_bpmp_mail: shmem@f1be0000 { + compatible = "nvidia,tegra264-bpmp-shmem"; + reg = <0x0 0xf1be0000 0x0 0x2000>; + no-map; + }; + }; +...