From: Samuel Holland <samuel@sholland.org>
To: Chen-Yu Tsai <wens@csie.org>, Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Samuel Holland <samuel@sholland.org>,
Gregory CLEMENT <gregory.clement@bootlin.com>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-sunxi@lists.linux.dev
Subject: [PATCH 1/3] dt-bindings: i2c: mv64xxx: Document DMA properties
Date: Mon, 29 Aug 2022 21:08:22 -0500 [thread overview]
Message-ID: <20220830020824.62288-2-samuel@sholland.org> (raw)
In-Reply-To: <20220830020824.62288-1-samuel@sholland.org>
Allwinner's I2C offload engine includes bidirectional DMA support. Add
the properties for describing this in the devicetree. "dmas" is optional
because not all instances of the controller have their DRQs hooked up.
For example, R_I2C0 and R_I2C1 on V536 have no DRQ number assigned.
Signed-off-by: Samuel Holland <samuel@sholland.org>
---
.../bindings/i2c/marvell,mv64xxx-i2c.yaml | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
index 0ec033e48830..63d665a4f9bb 100644
--- a/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/marvell,mv64xxx-i2c.yaml
@@ -66,6 +66,19 @@ properties:
resets:
maxItems: 1
+ dmas:
+ items:
+ - description: RX DMA Channel
+ - description: TX DMA Channel
+
+ dma-names:
+ items:
+ - const: rx
+ - const: tx
+
+dependencies:
+ dmas: [ dma-names ]
+
required:
- compatible
- reg
--
2.35.1
next prev parent reply other threads:[~2022-08-30 2:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-30 2:08 [PATCH 0/3] DMA binding for Allwinner V536/newer I2C Samuel Holland
2022-08-30 2:08 ` Samuel Holland [this message]
2022-08-30 9:36 ` [PATCH 1/3] dt-bindings: i2c: mv64xxx: Document DMA properties Krzysztof Kozlowski
2022-08-30 13:10 ` Samuel Holland
2022-08-30 13:23 ` Krzysztof Kozlowski
2022-09-07 20:02 ` Wolfram Sang
2022-08-30 2:08 ` [PATCH 2/3] arm64: dts: allwinner: a100: Add device node for DMA controller Samuel Holland
2022-09-06 21:09 ` Jernej Škrabec
2022-09-08 20:01 ` Jernej Škrabec
2022-08-30 2:08 ` [PATCH 3/3] arm64: dts: allwinner: a100: Add I2C DMA requests Samuel Holland
2022-09-06 21:11 ` Jernej Škrabec
2022-09-08 20:01 ` Jernej Škrabec
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