Dne torek, 21. marec 2023 ob 22:56:18 CEST je Cristian Ciocaltea napisal(a):
> Commit 370f696e4474 ("dt-bindings: serial: snps-dw-apb-uart: add dma &
> dma-names properties") documented dma-names property to handle Allwinner
> D1 dtbs_check warnings, but relies on the rx->tx ordering, which is the
> reverse of what a bunch of different boards expect.
>
> The initial proposed solution was to allow a flexible dma-names order in
> the binding, due to potential ABI breakage concerns after fixing the DTS
> files. But luckily the Allwinner boards are not affected, since they are
> using a shared DMA channel for rx and tx.
>
> Hence, the first step in fixing the inconsistency was to change
> dma-names order in the binding to tx->rx.
>
> Do the same for the snps,dw-apb-uart nodes in the DTS file.
>
> Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
> ---
Acked-by: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
Best regards,
Jernej
> arch/arm/boot/dts/sun8i-v3s.dtsi | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm/boot/dts/sun8i-v3s.dtsi
> b/arch/arm/boot/dts/sun8i-v3s.dtsi index db194c606fdc..b001251644f7 100644
> --- a/arch/arm/boot/dts/sun8i-v3s.dtsi
> +++ b/arch/arm/boot/dts/sun8i-v3s.dtsi
> @@ -479,7 +479,7 @@ uart0: serial@1c28000 {
> reg-io-width = <4>;
> clocks = <&ccu CLK_BUS_UART0>;
> dmas = <&dma 6>, <&dma 6>;
> - dma-names = "rx", "tx";
> + dma-names = "tx", "rx";
> resets = <&ccu RST_BUS_UART0>;
> status = "disabled";
> };
> @@ -492,7 +492,7 @@ uart1: serial@1c28400 {
> reg-io-width = <4>;
> clocks = <&ccu CLK_BUS_UART1>;
> dmas = <&dma 7>, <&dma 7>;
> - dma-names = "rx", "tx";
> + dma-names = "tx", "rx";
> resets = <&ccu RST_BUS_UART1>;
> status = "disabled";
> };
> @@ -505,7 +505,7 @@ uart2: serial@1c28800 {
> reg-io-width = <4>;
> clocks = <&ccu CLK_BUS_UART2>;
> dmas = <&dma 8>, <&dma 8>;
> - dma-names = "rx", "tx";
> + dma-names = "tx", "rx";
> resets = <&ccu RST_BUS_UART2>;
> pinctrl-0 = <&uart2_pins>;
> pinctrl-names = "default";
