linux-kernel - [PATCH v4 3/7] dt-bindings: memory: lpddr2: Add revision-id properties

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Date:   Wed,  6 Oct 2021 02:00:05 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: [PATCH v4 3/7] dt-bindings: memory: lpddr2: Add revision-id properties

Add optional revision-id standard LPDDR2 properties which will help to
identify memory chip.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 .../memory-controllers/ddr/jedec,lpddr2.yaml         | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml
index d99ccad54938..01efb43c3425 100644
--- a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml
@@ -24,6 +24,16 @@ properties:
           - enum:
               - jedec,lpddr2-nvm
 
+  revision-id1:
+    maximum: 255
+    description: |
+      Revision 1 value of SDRAM chip. Obtained from device datasheet.
+
+  revision-id2:
+    maximum: 255
+    description: |
+      Revision 2 value of SDRAM chip. Obtained from device datasheet.
+
   density:
     description: |
       Density in megabits of SDRAM chip. Obtained from device datasheet.
@@ -138,6 +148,8 @@ examples:
         compatible = "Elpida,ECB240ABACN", "jedec,lpddr2-s4";
         density = <2048>;
         io-width = <32>;
+        revision-id1 = <1>;
+        revision-id2 = <0>;
 
         tRPab-min-tck = <3>;
         tRCD-min-tck = <3>;
-- 
2.32.0