Messages in this thread Patch in this message | | | From | Maxime Ripard <> | Subject | [PATCH] ARM: sunxi: Use the Synosys APB UART instead of ns8250 | Date | Mon, 14 Jan 2013 20:09:27 +0100 |
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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.ripard@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
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