dt-bindings: sram: Merge Amlogic SRAM bindings into generic

The Amlogic SRAM bindings list only compatible so integrate them into
generic SRAM bindings schema.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sram/sram.yaml b/Documentation/devicetree/bindings/sram/sram.yaml
index d141027e5fe1..2ad398019605 100644
--- a/Documentation/devicetree/bindings/sram/sram.yaml
+++ b/Documentation/devicetree/bindings/sram/sram.yaml
@@ -65,6 +65,8 @@ patternProperties:
           Should contain a vendor specific string in the form
           <vendor>,[<device>-]<usage>
         enum:
+          - amlogic,meson8-smp-sram
+          - amlogic,meson8b-smp-sram
           - samsung,exynos4210-sysram
           - samsung,exynos4210-sysram-ns
 
@@ -163,3 +165,23 @@ examples:
             reg = <0x53000 0x1000>;
         };
     };
+
+  - |
+    // Amlogic's SMP-capable SoCs use part of the sram for the bringup of the cores.
+    // Once the core gets powered up it executes the code that is residing at a
+    // specific location.
+    //
+    // Therefore a reserved section sub-node has to be added to the mmio-sram
+    // declaration.
+    sram@d9000000 {
+        compatible = "mmio-sram";
+        reg = <0xd9000000 0x20000>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges = <0 0xd9000000 0x20000>;
+
+        smp-sram@1ff80 {
+            compatible = "amlogic,meson8b-smp-sram";
+            reg = <0x1ff80 0x8>;
+        };
+    };