[PATCH v4 net-next 04/10] dt-bindings: memory: mt7621: add syscon as compatible string

[Arınç ÜNAL]

The syscon string was introduced because the mt7621 clock driver needs to
read some registers creating a regmap from the syscon. The bindings were
added before the clock driver was properly mainlined and at first the clock
driver was using ralink architecture dependent operations rt_memc_* defined
in 'arch/mips/include/asm/mach-ralink/ralink_regs.h'.

This string is already there on the memory controller node on mt7621.dtsi.

Add syscon as a constant string on the compatible property, now that memc
became a syscon. Update the example accordingly.

Fixes: 5278e4a181ff ("dt-bindings: memory: add binding for Mediatek's MT7621 SDRAM memory controller")
Signed-off-by: Arınç ÜNAL <arinc.unal at arinc9.com>
Acked-by: Sergio Paracuellos <sergio.paracuellos at gmail.com>
---
 .../bindings/memory-controllers/mediatek,mt7621-memc.yaml   | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,mt7621-memc.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,mt7621-memc.yaml
index 85e02854f083..6ccdaf99c778 100644
--- a/Documentation/devicetree/bindings/memory-controllers/mediatek,mt7621-memc.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,mt7621-memc.yaml
@@ -11,7 +11,9 @@ maintainers:
 
 properties:
   compatible:
-    const: mediatek,mt7621-memc
+    items:
+      - const: mediatek,mt7621-memc
+      - const: syscon
 
   reg:
     maxItems: 1
@@ -25,6 +27,6 @@ additionalProperties: false
 examples:
   - |
     memory-controller at 5000 {
-        compatible = "mediatek,mt7621-memc";
+        compatible = "mediatek,mt7621-memc", "syscon";
         reg = <0x5000 0x1000>;
     };
-- 
2.34.1