@@ -314,6 +314,8 @@ uart0: serial@11002000 {
interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pericfg CLK_PERI_UART0_SEL>, <&pericfg CLK_PERI_UART0>;
clock-names = "baud", "bus";
+ dmas = <&apdma 0>, <&apdma 1>;
+ dma-names = "tx", "rx";
status = "disabled";
};
@@ -324,9 +326,37 @@ uart1: serial@11003000 {
interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pericfg CLK_PERI_UART1_SEL>, <&pericfg CLK_PERI_UART1>;
clock-names = "baud", "bus";
+ dmas = <&apdma 2>, <&apdma 3>;
+ dma-names = "tx", "rx";
status = "disabled";
};
+ apdma: dma-controller@11000380 {
+ compatible = "mediatek,mt6795-uart-dma",
+ "mediatek,mt6577-uart-dma";
+ reg = <0 0x11000380 0 0x60>,
+ <0 0x11000400 0 0x60>,
+ <0 0x11000480 0 0x60>,
+ <0 0x11000500 0 0x60>,
+ <0 0x11000580 0 0x60>,
+ <0 0x11000600 0 0x60>,
+ <0 0x11000680 0 0x60>,
+ <0 0x11000700 0 0x60>;
+ interrupts = <GIC_SPI 103 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 104 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 105 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 106 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 107 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 108 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 109 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 110 IRQ_TYPE_LEVEL_LOW>;
+ dma-requests = <8>;
+ clocks = <&pericfg CLK_PERI_AP_DMA>;
+ clock-names = "apdma";
+ mediatek,dma-33bits;
+ #dma-cells = <1>;
+ };
+
uart2: serial@11004000 {
compatible = "mediatek,mt6795-uart",
"mediatek,mt6577-uart";
@@ -334,6 +364,8 @@ uart2: serial@11004000 {
interrupts = <GIC_SPI 93 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pericfg CLK_PERI_UART2_SEL>, <&pericfg CLK_PERI_UART2>;
clock-names = "baud", "bus";
+ dmas = <&apdma 4>, <&apdma 5>;
+ dma-names = "tx", "rx";
status = "disabled";
};
@@ -344,6 +376,8 @@ uart3: serial@11005000 {
interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pericfg CLK_PERI_UART3_SEL>, <&pericfg CLK_PERI_UART3>;
clock-names = "baud", "bus";
+ dmas = <&apdma 6>, <&apdma 7>;
+ dma-names = "tx", "rx";
status = "disabled";
};
};
This SoC has a DMA controller with tx/rx channels for all of the UART controller IPs: add the apdma node and wire up the DMAs on all controllers. When one of the UART controllers is used as a serial console, the DMA will be automatically ignored. Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- arch/arm64/boot/dts/mediatek/mt6795.dtsi | 34 ++++++++++++++++++++++++ 1 file changed, 34 insertions(+)