On Wednesday, 10 July 2024 11:33:56 CEST Philipp Puschmann wrote: > DMA names are required by of_dma_request_slave_channel function that is > called during uart probe. So to enable DMA for uarts add the names as in > the RK3568 TRM. Setting it on channels without flow control apparently causes issues. See https://lore.kernel.org/linux-rockchip/20240628120130.24076-1-didi.debian@xxxxxxxxx/ > Signed-off-by: Philipp Puschmann <p.puschmann@xxxxxxxxxxx> > --- > arch/arm64/boot/dts/rockchip/rk356x.dtsi | 10 ++++++++++ > 1 file changed, 10 insertions(+) > > diff --git a/arch/arm64/boot/dts/rockchip/rk356x.dtsi > b/arch/arm64/boot/dts/rockchip/rk356x.dtsi index d8543b5557ee..4ae40661ca6a > 100644 > --- a/arch/arm64/boot/dts/rockchip/rk356x.dtsi > +++ b/arch/arm64/boot/dts/rockchip/rk356x.dtsi > @@ -489,6 +489,7 @@ uart0: serial@fdd50000 { > clocks = <&pmucru SCLK_UART0>, <&pmucru PCLK_UART0>; > clock-names = "baudclk", "apb_pclk"; > dmas = <&dmac0 0>, <&dmac0 1>; > + dma-names = "tx", "rx"; > pinctrl-0 = <&uart0_xfer>; > pinctrl-names = "default"; > reg-io-width = <4>; > @@ -1389,6 +1390,7 @@ uart1: serial@fe650000 { > clocks = <&cru SCLK_UART1>, <&cru PCLK_UART1>; > clock-names = "baudclk", "apb_pclk"; > dmas = <&dmac0 2>, <&dmac0 3>; > + dma-names = "tx", "rx"; > pinctrl-0 = <&uart1m0_xfer>; > pinctrl-names = "default"; > reg-io-width = <4>; > ...
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