From: Kenny Root <[email protected]>
From: Kenny Root <[email protected]>
Add documentation and example for memory-region in pmem.
Signed-off-by: Kenny Root <[email protected]>
Signed-off-by: Alistair Delva <[email protected]>
Cc: "Oliver O'Halloran" <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Vishal Verma <[email protected]>
Cc: Dave Jiang <[email protected]>
Cc: Ira Weiny <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
---
.../devicetree/bindings/pmem/pmem-region.txt | 29 +++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/Documentation/devicetree/bindings/pmem/pmem-region.txt b/Documentation/devicetree/bindings/pmem/pmem-region.txt
index 5cfa4f016a00..0ec87bd034e0 100644
--- a/Documentation/devicetree/bindings/pmem/pmem-region.txt
+++ b/Documentation/devicetree/bindings/pmem/pmem-region.txt
@@ -29,6 +29,18 @@ Required properties:
in a separate device node. Having multiple address ranges in a
node implies no special relationship between the two ranges.
+ This property may be replaced or supplemented with a
+ memory-region property. Only one of reg or memory-region
+ properties is required.
+
+ - memory-region:
+ Reference to the reserved memory node. The reserved memory
+ node should be defined as per the bindings in
+ reserved-memory.txt
+
+ This property may be replaced or supplemented with a reg
+ property. Only one of reg or memory-region is required.
+
Optional properties:
- Any relevant NUMA assocativity properties for the target platform.
@@ -63,3 +75,20 @@ Examples:
volatile;
};
+
+ /*
+ * This example uses a reserved-memory entry instead of
+ * specifying the memory region directly in the node.
+ */
+
+ reserved-memory {
+ pmem_1: pmem@5000 {
+ no-map;
+ reg = <0x00005000 0x00001000>;
+ };
+ };
+
+ pmem@1 {
+ compatible = "pmem-region";
+ memory-region = <&pmem_1>;
+ };
--
2.25.0.265.gbab2e86ba0-goog