ARM: sunxi: Use the Synosys APB UART instead of ns8250
authorMaxime Ripard <maxime.ripard@free-electrons.com>
Mon, 14 Jan 2013 18:53:54 +0000 (19:53 +0100)
committerMaxime Ripard <maxime.ripard@free-electrons.com>
Wed, 16 Jan 2013 18:13:18 +0000 (19:13 +0100)
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

index 8bbc2bf..8b36abe 100644 (file)
                };
 
                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";
                };