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arm64: dts: mediatek: mt6795: Add support for APDMA and wire up UART DMAs 

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>
Link: https://lore.kernel.org/r/20221027095504.37432-4-angelogioacchino.delregno@collabora.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
AngeloGioacchino Del Regno 2022-10-27 11:55:01 +02:00 committed by Matthias Brugger
parent 12a36f028a
commit 09608ccc8a
1 changed files with 34 additions and 0 deletions
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34
arch/arm64/boot/dts/mediatek/mt6795.dtsi
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@ -316,6 +316,8 @@
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";
};
@ -326,9 +328,37 @@
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";
@ -336,6 +366,8 @@
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";
};
@ -346,6 +378,8 @@
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";
};
};