linux-kernel - [PATCH 2/2] arm64: dts: mediatek: mt8516: add support for APDMA

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Date:   Thu, 15 Oct 2020 14:33:15 +0200
From:   Fabien Parent <fparent@...libre.com>
To:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, dmaengine@...r.kernel.org
Cc:     matthias.bgg@...il.com, robh+dt@...nel.org, vkoul@...nel.org,
        sean.wang@...iatek.com, Fabien Parent <fparent@...libre.com>
Subject: [PATCH 2/2] arm64: dts: mediatek: mt8516: add support for APDMA

Add support the APDMA IP on MT8516. APDMA is a DMA controller
for UARTs.

Signed-off-by: Fabien Parent <fparent@...libre.com>
---
 arch/arm64/boot/dts/mediatek/mt8516.dtsi | 27 ++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8516.dtsi b/arch/arm64/boot/dts/mediatek/mt8516.dtsi
index eca7969e15ab..a017664f8eed 100644
--- a/arch/arm64/boot/dts/mediatek/mt8516.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8516.dtsi
@@ -269,6 +269,27 @@ gic: interrupt-controller@...10000 {
 				(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
 		};
 
+		apdma: dma-controller@...00480 {
+			compatible = "mediatek,mt8516-uart-dma",
+				     "mediatek,mt6577-uart-dma";
+			reg = <0 0x11000480 0 0x80>,
+			      <0 0x11000500 0 0x80>,
+			      <0 0x11000580 0 0x80>,
+			      <0 0x11000600 0 0x80>,
+			      <0 0x11000980 0 0x80>,
+			      <0 0x11000a00 0 0x80>;
+			interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_LOW>,
+				     <GIC_SPI 97 IRQ_TYPE_LEVEL_LOW>,
+				     <GIC_SPI 98 IRQ_TYPE_LEVEL_LOW>,
+				     <GIC_SPI 99 IRQ_TYPE_LEVEL_LOW>,
+				     <GIC_SPI 100 IRQ_TYPE_LEVEL_LOW>,
+				     <GIC_SPI 101 IRQ_TYPE_LEVEL_LOW>;
+			dma-requests = <6>;
+			clocks = <&topckgen CLK_TOP_APDMA>;
+			clock-names = "apdma";
+			#dma-cells = <1>;
+		};
+
 		uart0: serial@...05000 {
 			compatible = "mediatek,mt8516-uart",
 				     "mediatek,mt6577-uart";
@@ -277,6 +298,8 @@ uart0: serial@...05000 {
 			clocks = <&topckgen CLK_TOP_UART0_SEL>,
 				 <&topckgen CLK_TOP_UART0>;
 			clock-names = "baud", "bus";
+			dmas = <&apdma 0
+				&apdma 1>;
 			status = "disabled";
 		};
 
@@ -288,6 +311,8 @@ uart1: serial@...06000 {
 			clocks = <&topckgen CLK_TOP_UART1_SEL>,
 				 <&topckgen CLK_TOP_UART1>;
 			clock-names = "baud", "bus";
+			dmas = <&apdma 2
+				&apdma 3>;
 			status = "disabled";
 		};
 
@@ -299,6 +324,8 @@ uart2: serial@...07000 {
 			clocks = <&topckgen CLK_TOP_UART2_SEL>,
 				 <&topckgen CLK_TOP_UART2>;
 			clock-names = "baud", "bus";
+			dmas = <&apdma 4
+				&apdma 5>;
 			status = "disabled";
 		};
 
-- 
2.28.0