From: Paul Cercueil <paul@crapouillou.net>
To: Vinod Koul <vkoul@kernel.org>, Rob Herring <robh+dt@kernel.org>
Cc: list@opendingux.net, dmaengine@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mips@vger.kernel.org, Paul Cercueil <paul@crapouillou.net>
Subject: [PATCH 2/5] dt-bindings: dma: ingenic: Support #dma-cells = <3>
Date: Mon, 11 Oct 2021 16:36:49 +0200 [thread overview]
Message-ID: <20211011143652.51976-3-paul@crapouillou.net> (raw)
In-Reply-To: <20211011143652.51976-1-paul@crapouillou.net>
Extend the binding to support specifying a different request type for
each direction.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
Documentation/devicetree/bindings/dma/ingenic,dma.yaml | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/dma/ingenic,dma.yaml b/Documentation/devicetree/bindings/dma/ingenic,dma.yaml
index f45fd5235879..51b41e4795a2 100644
--- a/Documentation/devicetree/bindings/dma/ingenic,dma.yaml
+++ b/Documentation/devicetree/bindings/dma/ingenic,dma.yaml
@@ -44,13 +44,17 @@ properties:
maxItems: 1
"#dma-cells":
- const: 2
+ enum: [2, 3]
description: >
DMA clients must use the format described in dma.txt, giving a phandle
- to the DMA controller plus the following 2 integer cells:
+ to the DMA controller plus the following integer cells:
- Request type: The DMA request type for transfers to/from the
device on the allocated channel, as defined in the SoC documentation.
+ If "#dma-cells" is 2, the request type is a single cell. If
+ "#dma-cells" is 3, the request type has two cells; the first one
+ corresponds to the host to device direction, the second one corresponds
+ to the device to host direction.
- Channel: If set to 0xffffffff, any available channel will be allocated
for the client. Otherwise, the exact channel specified will be used.
--
2.33.0
next prev parent reply other threads:[~2021-10-11 14:37 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-11 14:36 [PATCH 0/5] dmaengine: dma-jz4780: Driver updates Paul Cercueil
2021-10-11 14:36 ` [PATCH 1/5] dt-bindings: dma: ingenic: Add compatible strings for MDMA and BDMA Paul Cercueil
2021-10-11 23:13 ` Rob Herring
2021-10-12 0:48 ` Rob Herring
2021-10-13 21:34 ` Paul Cercueil
2021-10-11 14:36 ` Paul Cercueil [this message]
2021-10-18 6:28 ` [PATCH 2/5] dt-bindings: dma: ingenic: Support #dma-cells = <3> Vinod Koul
2021-10-11 14:36 ` [PATCH 3/5] dmaengine: jz4780: Work around hardware bug on JZ4760 SoCs Paul Cercueil
2021-10-11 14:36 ` [PATCH 4/5] dmaengine: jz4780: Add support for the MDMA and BDMA in the JZ4760(B) Paul Cercueil
2021-10-11 14:36 ` [PATCH 5/5] dmaengine: jz4780: Support bidirectional I/O on one channel Paul Cercueil
2021-10-18 6:33 ` Vinod Koul
2021-10-21 12:51 ` Paul Cercueil
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