From 1bea07f16da0d77689cda7abe73939dd1dfdea22 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime.ripard@free-electrons.com>
Date: Mon, 14 Jan 2013 19:53:54 +0100
Subject: [PATCH] ARM: sunxi: Use the Synosys APB UART instead of ns8250
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 8bbc2bfef221a..8b36abea9f2ed 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";
};