[PATCH 1/3] dt-bindings: dma: ti: k3-bcdma: Describe cfg register regions

[Vignesh Raghavendra]

Block copy DMA(BCDMA)module on K3 SoCs have ring cfg, TX and RX
channel cfg register regions which are usually configured by a Device
Management firmware. But certain entities such as bootloader (like
U-Boot) may have to access them directly. Describe this region in the
binding documentation for completeness of module description.

Keep the binding compatible with existing DTS files by requiring first
five regions to be present at least.

Signed-off-by: Vignesh Raghavendra <vigneshr@xxxxxx>
---
 .../devicetree/bindings/dma/ti/k3-bcdma.yaml  | 25 +++++++++++++------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml b/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
index 4ca300a42a99..d166e284532b 100644
--- a/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
+++ b/Documentation/devicetree/bindings/dma/ti/k3-bcdma.yaml
@@ -37,11 +37,11 @@ properties:
 
   reg:
     minItems: 3
-    maxItems: 5
+    maxItems: 8
 
   reg-names:
     minItems: 3
-    maxItems: 5
+    maxItems: 8
 
   "#dma-cells":
     const: 3
@@ -161,14 +161,19 @@ allOf:
       properties:
         reg:
           minItems: 5
+          maxItems: 8
 
         reg-names:
+          minItems: 5
           items:
             - const: gcfg
             - const: bchanrt
             - const: rchanrt
             - const: tchanrt
             - const: ringrt
+            - const: cfg
+            - const: tchan
+            - const: rchan
 
       required:
         - ti,sci-rm-range-bchan
@@ -216,12 +221,16 @@ examples:
             main_bcdma: dma-controller@485c0100 {
                 compatible = "ti,am64-dmss-bcdma";
 
-                reg = <0x0 0x485c0100 0x0 0x100>,
-                      <0x0 0x4c000000 0x0 0x20000>,
-                      <0x0 0x4a820000 0x0 0x20000>,
-                      <0x0 0x4aa40000 0x0 0x20000>,
-                      <0x0 0x4bc00000 0x0 0x100000>;
-                reg-names = "gcfg", "bchanrt", "rchanrt", "tchanrt", "ringrt";
+                reg = <0x00 0x485c0100 0x00 0x100>,
+                      <0x00 0x4c000000 0x00 0x20000>,
+                      <0x00 0x4a820000 0x00 0x20000>,
+                      <0x00 0x4aa40000 0x00 0x20000>,
+                      <0x00 0x4bc00000 0x00 0x100000>,
+                      <0x00 0x48600000 0x00 0x8000>,
+                      <0x00 0x484a4000 0x00 0x2000>,
+                      <0x00 0x484c2000 0x00 0x2000>;
+                reg-names = "gcfg", "bchanrt", "rchanrt", "tchanrt", "ringrt",
+                            "cfg", "tchan", "rchan";
                 msi-parent = <&inta_main_dmss>;
                 #dma-cells = <3>;
 
-- 
2.41.0