Hi, Am Montag, 15. Juni 2015, 17:47:48 schrieb Romain Perier: > This removes warning "ttyS2 - Failed to request dma" from kernel logs > > Signed-off-by: Romain Perier <romain.perier@xxxxxxxxx> > --- > arch/arm/boot/dts/rk3288.dtsi | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi > index 22316d0..816f40a 100644 > --- a/arch/arm/boot/dts/rk3288.dtsi > +++ b/arch/arm/boot/dts/rk3288.dtsi > @@ -385,6 +385,8 @@ > clock-names = "baudclk", "apb_pclk"; > pinctrl-names = "default"; > pinctrl-0 = <&uart2_xfer>; > + dmas = <&dmac_bus_s 4>, <&dmac_bus_s 5>; > + dma-names = "tx", "rx"; > status = "disabled"; > }; The dma channels are a property of the hardware, so we probably should add them for all uarts in one go, instead of everytime something complains :-) in dmac_peri uart0: tx 1, rx 2 uart1: tx 3, rx 4 uart3: tx 7, rx 8 uart4: tx 9, rx 10 Just for the record and if anybody is interested to work in this, we have an issue with the dma implementation [0] that is not yet solved upstream. From what I've remember, that mostly got triggered on higher speeds, like higher spi-speeds or i2s audio stuff (poping). Heiko [0] https://chromium.googlesource.com/chromiumos/third_party/kernel/+/93c3b192dca7e8c773c4d28873114c325382b63e%5E%21/#F0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
