linux-kernel - [PATCH 1/2] dt-bindings: dmaengine: zynqmp

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Message-ID: <20240726062639.2609974-2-abin.joseph@amd.com>
Date: Fri, 26 Jul 2024 11:56:38 +0530
From: Abin Joseph <abin.joseph@....com>
To: <vkoul@...nel.org>, <michal.simek@....com>, <robh@...nel.org>,
	<u.kleine-koenig@...gutronix.de>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>, <radhey.shyam.pandey@....com>,
	<harini.katakam@....com>
CC: <git@....com>, <abin.joseph@....com>, <dmaengine@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] dt-bindings: dmaengine: zynqmp_dma: Add a new compatible string

Add compatible string "amd,versal2-dma-1.0" to support AMD Versal Gen 2
platform.

AMD Versal Gen 2 has 8 LPD DMA IPs in PS that can be used as general
purpose DMAs which is designed to support memory to memory and memory to
IO buffer transfer. Versal Gen 2 DMA IP has different interrupt register
offset. Add example binding documentation for the newly added compatible
string.

Signed-off-by: Abin Joseph <abin.joseph@....com>
---
 .../dma/xilinx/xlnx,zynqmp-dma-1.0.yaml         | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1.0.yaml b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1.0.yaml
index 769ce23aaac2..17f16ae7e42b 100644
--- a/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1.0.yaml
+++ b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dma-1.0.yaml
@@ -24,7 +24,9 @@ properties:
     const: 1
 
   compatible:
-    const: xlnx,zynqmp-dma-1.0
+    enum:
+      - xlnx,zynqmp-dma-1.0
+      - amd,versal2-dma-1.0
 
   reg:
     description: memory map for gdma/adma module access
@@ -74,6 +76,7 @@ additionalProperties: false
 examples:
   - |
     #include <dt-bindings/clock/xlnx-zynqmp-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
 
     fpd_dma_chan1: dma-controller@...00000 {
       compatible = "xlnx,zynqmp-dma-1.0";
@@ -86,3 +89,15 @@ examples:
       xlnx,bus-width = <128>;
       dma-coherent;
     };
+
+    fpd_dma_chan2: dma-controller@...00000 {
+      compatible = "amd,versal2-dma-1.0";
+      reg = <0xebd00000 0x1000>;
+      interrupt-parent = <&gic>;
+      interrupts = <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>;
+      #dma-cells = <1>;
+      clock-names = "clk_main", "clk_apb";
+      clocks = <&zynqmp_clk GDMA_REF>, <&zynqmp_clk LPD_LSBUS>;
+      xlnx,bus-width = <128>;
+      dma-coherent;
+    };
-- 
2.25.1