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From: Zong Li <zong.li@sifive.com>
To: robh+dt@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com,
	aou@eecs.berkeley.edu, krzysztof.kozlowski@canonical.com,
	conor.dooley@microchip.com, geert@linux-m68k.org,
	bin.meng@windriver.com, green.wan@sifive.com, vkoul@kernel.org,
	dmaengine@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org
Cc: Zong Li <zong.li@sifive.com>
Subject: [PATCH v2 2/3] dt-bindings: Add dma-channels for pdma device node
Date: Tue, 11 Jan 2022 16:51:26 +0800	[thread overview]
Message-ID: <5db314b798cd9cfcb5cb61bc56515220b7d50315.1641890718.git.zong.li@sifive.com> (raw)
In-Reply-To: <cover.1641890718.git.zong.li@sifive.com>

Add dma-channels property, then we can determine how many channels there
by device tree, rather than statically defines it in PDMA driver

Signed-off-by: Zong Li <zong.li@sifive.com>
---
 .../devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml    | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
index d32a71b975fe..3dbb8caefc17 100644
--- a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
+++ b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
@@ -34,6 +34,12 @@ properties:
     minItems: 1
     maxItems: 8
 
+  dma-channels:
+    description: For backwards-compatible, the default value is 4
+    minimum: 1
+    maximum: 4
+    default: 4
+
   '#dma-cells':
     const: 1
 
@@ -50,6 +56,7 @@ examples:
     dma@3000000 {
       compatible = "sifive,fu540-c000-pdma";
       reg = <0x3000000 0x8000>;
+      dma-channels = <4>;
       interrupts = <23 24 25 26 27 28 29 30>;
       #dma-cells = <1>;
     };
-- 
2.31.1


WARNING: multiple messages have this Message-ID (diff)
From: Zong Li <zong.li@sifive.com>
To: robh+dt@kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com,
	aou@eecs.berkeley.edu, krzysztof.kozlowski@canonical.com,
	conor.dooley@microchip.com, geert@linux-m68k.org,
	bin.meng@windriver.com, green.wan@sifive.com, vkoul@kernel.org,
	dmaengine@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org
Cc: Zong Li <zong.li@sifive.com>
Subject: [PATCH v2 2/3] dt-bindings: Add dma-channels for pdma device node
Date: Tue, 11 Jan 2022 16:51:26 +0800	[thread overview]
Message-ID: <5db314b798cd9cfcb5cb61bc56515220b7d50315.1641890718.git.zong.li@sifive.com> (raw)
In-Reply-To: <cover.1641890718.git.zong.li@sifive.com>

Add dma-channels property, then we can determine how many channels there
by device tree, rather than statically defines it in PDMA driver

Signed-off-by: Zong Li <zong.li@sifive.com>
---
 .../devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml    | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
index d32a71b975fe..3dbb8caefc17 100644
--- a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
+++ b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
@@ -34,6 +34,12 @@ properties:
     minItems: 1
     maxItems: 8
 
+  dma-channels:
+    description: For backwards-compatible, the default value is 4
+    minimum: 1
+    maximum: 4
+    default: 4
+
   '#dma-cells':
     const: 1
 
@@ -50,6 +56,7 @@ examples:
     dma@3000000 {
       compatible = "sifive,fu540-c000-pdma";
       reg = <0x3000000 0x8000>;
+      dma-channels = <4>;
       interrupts = <23 24 25 26 27 28 29 30>;
       #dma-cells = <1>;
     };
-- 
2.31.1


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  parent reply	other threads:[~2022-01-11  8:51 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-11  8:51 [PATCH v2 0/3] Determine the number of DMA channels by 'dma-channels' property Zong Li
2022-01-11  8:51 ` Zong Li
2022-01-11  8:51 ` [PATCH v2 1/3] riscv: dts: Add dma-channels property in dma node Zong Li
2022-01-11  8:51   ` Zong Li
2022-01-11  8:51 ` Zong Li [this message]
2022-01-11  8:51   ` [PATCH v2 2/3] dt-bindings: Add dma-channels for pdma device node Zong Li
2022-01-11  8:51 ` [PATCH v2 3/3] dmaengine: sf-pdma: Get number of channel by device tree Zong Li
2022-01-11  8:51   ` Zong Li
2022-01-12  8:28   ` Geert Uytterhoeven
2022-01-12  8:28     ` Geert Uytterhoeven
2022-01-13  6:53     ` Zong Li
2022-01-13  6:53       ` Zong Li
2022-01-13  7:25       ` Zong Li
2022-01-13  7:25         ` Zong Li
2022-01-13  8:57         ` Geert Uytterhoeven
2022-01-13  8:57           ` Geert Uytterhoeven
2022-01-13  9:34           ` Zong Li
2022-01-13  9:34             ` Zong Li

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