As for I2C and SPI, it now is possible to reserve a fixed index for
mmc/mmcblk devices.

Signed-off-by: Matthias Schiffer <matthias.schif...@ew.tq-group.com>
---

v3: new patch

 Documentation/devicetree/bindings/mmc/mmc-controller.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml 
b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
index b96da0c7f819..22ed4a36c65d 100644
--- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
+++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
@@ -367,6 +367,14 @@ examples:
     };
 
   - |
+    /*
+     * Optionally define an alias to reserve a fixed index for the
+     * mmc and mmcblk devices
+     */
+    aliases {
+        mmc0 = &mmc3;
+    };
+
     mmc3: mmc@1c12000 {
         #address-cells = <1>;
         #size-cells = <0>;
-- 
2.17.1

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