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[v2,4/4] dt-bindings: dma: ti: k3-udma: Describe cfg register regions

Message ID 20231122154238.815781-5-vigneshr@ti.com
State Superseded
Headers show
Series dt-bindings: dma: ti: k3*: Update optional reg regions | expand

Commit Message

Vignesh Raghavendra Nov. 22, 2023, 3:42 p.m. UTC 
Unified DMA (UDMA) module on K3 SoCs have TX and RX channel cfg and RX
flow 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
four regions to be present at least.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
---
 .../devicetree/bindings/dma/ti/k3-udma.yaml       | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)
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Patch

diff --git a/Documentation/devicetree/bindings/dma/ti/k3-udma.yaml b/Documentation/devicetree/bindings/dma/ti/k3-udma.yaml
index ded588bd079a..b18cf2bfdb5b 100644
--- a/Documentation/devicetree/bindings/dma/ti/k3-udma.yaml
+++ b/Documentation/devicetree/bindings/dma/ti/k3-udma.yaml
@@ -69,16 +69,24 @@  properties:
       - ti,j721e-navss-mcu-udmap
 
   reg:
+    minItems: 3
     items:
       - description: UDMA-P Control /Status Registers region
       - description: RX Channel Realtime Registers region
       - description: TX Channel Realtime Registers region
+      - description: TX Configuration Registers region
+      - description: RX Configuration Registers region
+      - description: RX Flow Configuration Registers region
 
   reg-names:
+    minItems: 3
     items:
       - const: gcfg
       - const: rchanrt
       - const: tchanrt
+      - const: tchan
+      - const: rchan
+      - const: rflow
 
   msi-parent: true
 
@@ -161,8 +169,11 @@  examples:
                 compatible = "ti,am654-navss-main-udmap";
                 reg = <0x0 0x31150000 0x0 0x100>,
                       <0x0 0x34000000 0x0 0x100000>,
-                      <0x0 0x35000000 0x0 0x100000>;
-                reg-names = "gcfg", "rchanrt", "tchanrt";
+                      <0x0 0x35000000 0x0 0x100000>,
+                      <0x0 0x30b00000 0x0 0x20000>,
+                      <0x0 0x30c00000 0x0 0x8000>,
+                      <0x0 0x30d00000 0x0 0x4000>;
+                reg-names = "gcfg", "rchanrt", "tchanrt", "tchan", "rchan", "rflow";
                 #dma-cells = <1>;
 
                 ti,ringacc = <&ringacc>;