1 files changed, 25 insertions, 3 deletions
diff --git a/dts/Bindings/sram/sram.yaml b/dts/Bindings/sram/sram.yaml
index 7b83cc6c9b..19d116ff9d 100644
--- a/dts/Bindings/sram/sram.yaml
+++ b/dts/Bindings/sram/sram.yaml
@@ -29,6 +29,7 @@ properties:
       enum:
         - mmio-sram
         - atmel,sama5d2-securam
+        - rockchip,rk3288-pmu-sram
 
   reg:
     maxItems: 1
@@ -73,6 +74,8 @@ patternProperties:
             - allwinner,sun50i-a64-sram-c
             - amlogic,meson8-smp-sram
             - amlogic,meson8b-smp-sram
+            - amlogic,meson-gxbb-scp-shmem
+            - amlogic,meson-axg-scp-shmem
             - renesas,smp-sram
             - rockchip,rk3066-smp-sram
             - samsung,exynos4210-sysram
@@ -118,9 +121,18 @@ patternProperties:
 required:
   - compatible
   - reg
-  - "#address-cells"
-  - "#size-cells"
-  - ranges
+
+if:
+  properties:
+    compatible:
+      contains:
+        const: rockchip,rk3288-pmu-sram
+
+else:
+  required:
+    - "#address-cells"
+    - "#size-cells"
+    - ranges
 
 additionalProperties: false
 
@@ -224,6 +236,16 @@ examples:
     };
 
   - |
+    // Rockchip's rk3288 SoC uses the sram of pmu to store the function of
+    // resume from maskrom(the 1st level loader). This is a common use of
+    // the "pmu-sram" because it keeps power even in low power states
+    // in the system.
+    sram@ff720000 {
+      compatible = "rockchip,rk3288-pmu-sram", "mmio-sram";
+      reg = <0xff720000 0x1000>;
+    };
+
+  - |
     // Allwinner's A80 SoC uses part of the secure sram for hotplugging of the
     // primary core (cpu0). Once the core gets powered up it checks if a magic
     // value is set at a specific location. If it is then the BROM will jump