The UART controller used in the A10/A13 is the Synopsys DesignWare 8250. The wrong use of a regular 8250 driver may lead to a oops during kernel boot with "irq 17: nobody cared", because the apb UART as an extra interrupt that gets raised when writing to the LCR when busy.
Signed-off-by: Maxime Ripard <maxime.rip...@free-electrons.com> --- arch/arm/boot/dts/sunxi.dtsi | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/dts/sunxi.dtsi b/arch/arm/boot/dts/sunxi.dtsi index 8bbc2bf..8b36abe 100644 --- a/arch/arm/boot/dts/sunxi.dtsi +++ b/arch/arm/boot/dts/sunxi.dtsi @@ -60,19 +60,21 @@ }; uart0: uart@01c28000 { - compatible = "ns8250"; + compatible = "snps,dw-apb-uart"; reg = <0x01c28000 0x400>; interrupts = <1>; reg-shift = <2>; + reg-io-width = <4>; clock-frequency = <24000000>; status = "disabled"; }; uart1: uart@01c28400 { - compatible = "ns8250"; + compatible = "snps,dw-apb-uart"; reg = <0x01c28400 0x400>; interrupts = <2>; reg-shift = <2>; + reg-io-width = <4>; clock-frequency = <24000000>; status = "disabled"; }; -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/