[PATCH 1/2] dt-bindings: nvmem: imx-iim: Allow syscon fallback on i.MX5

[Fabio Estevam <festevam@gmail.com>]

The i.MX51 and i.MX53 SoC device code reads the unique ID through
syscon_regmap_lookup_by_compatible(). Their IIM nodes therefore need the
syscon fallback so the syscon core can instantiate a regmap.

Allow the two-item compatible sequence for these SoCs. This prepares for
restoring the fallback removed while making the IIM nodes conform to the
binding.

Cc: stable@vger.kernel.org
Fixes: d5b55c35e033 ("ARM: dts: imx: Fix the iim compatible string")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
---
 .../devicetree/bindings/nvmem/imx-iim.yaml    | 20 +++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/nvmem/imx-iim.yaml b/Documentation/devicetree/bindings/nvmem/imx-iim.yaml
index bb37d72c9eaa..ebfd947e6800 100644
--- a/Documentation/devicetree/bindings/nvmem/imx-iim.yaml
+++ b/Documentation/devicetree/bindings/nvmem/imx-iim.yaml
@@ -20,13 +20,17 @@ allOf:
 
 properties:
   compatible:
-    enum:
-      - fsl,imx25-iim
-      - fsl,imx27-iim
-      - fsl,imx31-iim
-      - fsl,imx35-iim
-      - fsl,imx51-iim
-      - fsl,imx53-iim
+    oneOf:
+      - enum:
+          - fsl,imx25-iim
+          - fsl,imx27-iim
+          - fsl,imx31-iim
+          - fsl,imx35-iim
+      - items:
+          - enum:
+              - fsl,imx51-iim
+              - fsl,imx53-iim
+          - const: syscon
 
   reg:
     maxItems: 1
@@ -50,7 +54,7 @@ examples:
     #include <dt-bindings/clock/imx5-clock.h>
 
     iim: efuse@63f98000 {
-        compatible = "fsl,imx53-iim";
+        compatible = "fsl,imx53-iim", "syscon";
         reg = <0x63f98000 0x4000>;
         interrupts = <69>;
         clocks = <&clks IMX5_CLK_IIM_GATE>;
-- 
2.43.0