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SubjectRe: [PATCH] arm64: dts: rockchip: add rk3399 UART DMAs
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On 21/03/2019 14:40, Katsuhiro Suzuki wrote:
> Add UART dma channels as specified by the rk3399 TRM.

No UART4? That's arguably one of the more useful ones, since 1 and 3
often end up muxed to ethernet instead.

Also, does UART DMA actually work yet? I guess I can try for myself once
I get home, but I remember last time I looked it was bailing out because
the 8250 driver wanted a dmaengine feature that the pl330 driver didn't
implement.

Robin.

> Refer:
> RK3399 TRM V1.4: Chapter 12 DMA Controller
>
> Signed-off-by: Katsuhiro Suzuki <katsuhiro@katsuster.net>
> ---
> arch/arm64/boot/dts/rockchip/rk3399.dtsi | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> index 0301e3e01b38..4eed7aae6989 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> @@ -635,6 +635,8 @@
> clocks = <&cru SCLK_UART0>, <&cru PCLK_UART0>;
> clock-names = "baudclk", "apb_pclk";
> interrupts = <GIC_SPI 99 IRQ_TYPE_LEVEL_HIGH 0>;
> + dmas = <&dmac_peri 0>, <&dmac_peri 1>;
> + dma-names = "tx", "rx";
> reg-shift = <2>;
> reg-io-width = <4>;
> pinctrl-names = "default";
> @@ -648,6 +650,8 @@
> clocks = <&cru SCLK_UART1>, <&cru PCLK_UART1>;
> clock-names = "baudclk", "apb_pclk";
> interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH 0>;
> + dmas = <&dmac_peri 2>, <&dmac_peri 3>;
> + dma-names = "tx", "rx";
> reg-shift = <2>;
> reg-io-width = <4>;
> pinctrl-names = "default";
> @@ -661,6 +665,8 @@
> clocks = <&cru SCLK_UART2>, <&cru PCLK_UART2>;
> clock-names = "baudclk", "apb_pclk";
> interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH 0>;
> + dmas = <&dmac_peri 4>, <&dmac_peri 5>;
> + dma-names = "tx", "rx";
> reg-shift = <2>;
> reg-io-width = <4>;
> pinctrl-names = "default";
> @@ -674,6 +680,8 @@
> clocks = <&cru SCLK_UART3>, <&cru PCLK_UART3>;
> clock-names = "baudclk", "apb_pclk";
> interrupts = <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH 0>;
> + dmas = <&dmac_peri 6>, <&dmac_peri 7>;
> + dma-names = "tx", "rx";
> reg-shift = <2>;
> reg-io-width = <4>;
> pinctrl-names = "default";
>

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