Re: [PATCH] ARM: dts: rockchip: use DMA channels for UARTs of TinkerBoard

[Katsuhiro Suzuki]

Hello Heiko,

> This belongs in rk3288.dtsi, as this is definitly not board-specific, as
> the dma-uart connection is done inside the soc.
>
> At least on arm64 (rk3328, px30, probably more) we already have the
> uart dmas in the core dtsi without any problems.
>
> Is there any reason why you only did add it to the tinker board only?

There is no special reason. Simply I don't have and not tested on other
boards of RK3288. But I hope these DMA settings can work correctly on
other boards.

I'll resend patch for rk3288.dtsi.

Best Regards,
Katsuhiro Suzuki


On 2020/03/15 0:09, Heiko StÃbner wrote:
> Hi,
>
> Am Samstag, 14. MÃrz 2020, 15:23:27 CET schrieb Katsuhiro Suzuki:
> > This patch enables to use DMAC for all UARTs that are connected to
> > dmac_peri core for TinkerBoard.
> >
> > Only uart2 is connected different DMAC (dmac_bus_s) so keep current
> > settings on this patch.
>
> This belongs in rk3288.dtsi, as this is definitly not board-specific, as
> the dma-uart connection is done inside the soc.
>
> At least on arm64 (rk3328, px30, probably more) we already have the
> uart dmas in the core dtsi without any problems.
>
> Is there any reason why you only did add it to the tinker board only?
>
>
> Heiko
>
>
> > Signed-off-by: Katsuhiro Suzuki <katsuhiro@xxxxxxxxxxxxx>
> > ---
> >   arch/arm/boot/dts/rk3288-tinker.dtsi | 8 ++++++++
> >   1 file changed, 8 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/rk3288-tinker.dtsi b/arch/arm/boot/dts/rk3288-tinker.dtsi
> > index 312582c1bd37..6efabeaf3c6d 100644
> > --- a/arch/arm/boot/dts/rk3288-tinker.dtsi
> > +++ b/arch/arm/boot/dts/rk3288-tinker.dtsi
> > @@ -491,10 +491,14 @@ &tsadc {
> >   };
> >   
> >   &uart0 {
> > +	dmas = <&dmac_peri 1>, <&dmac_peri 2>;
> > +	dma-names = "tx", "rx";
> >   	status = "okay";
> >   };
> >   
> >   &uart1 {
> > +	dmas = <&dmac_peri 3>, <&dmac_peri 4>;
> > +	dma-names = "tx", "rx";
> >   	status = "okay";
> >   };
> >   
> > @@ -503,10 +507,14 @@ &uart2 {
> >   };
> >   
> >   &uart3 {
> > +	dmas = <&dmac_peri 7>, <&dmac_peri 8>;
> > +	dma-names = "tx", "rx";
> >   	status = "okay";
> >   };
> >   
> >   &uart4 {
> > +	dmas = <&dmac_peri 9>, <&dmac_peri 10>;
> > +	dma-names = "tx", "rx";
> >   	status = "okay";
> >   };
> >