Messages in this thread | | | Subject | Re: [PATCH] arm64: dts: rockchip: add rk3399 UART DMAs | From | Robin Murphy <> | Date | Thu, 21 Mar 2019 15:21:51 +0000 |
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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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