arm: dts: mt7622: force high-speed mode for uart

The input clock for uart is too slow (25MHz) which introduces frequent data
error on both receiving and transmitting even if the baudrate is 115200.

Using high-speed can significantly solve this issue.

Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>

diff --git a/arch/arm/dts/mt7622.dtsi b/arch/arm/dts/mt7622.dtsi
index 0127474c95d498566fb8511ae3369c99db5badb6..fb6c1b715493530f025c9241e42dffe248bb4422 100644 (file)
--- a/arch/arm/dts/mt7622.dtsi
+++ b/arch/arm/dts/mt7622.dtsi
@@ -175,6 +175,7 @@
                status = "disabled";
                assigned-clocks = <&topckgen CLK_TOP_AXI_SEL>;
                assigned-clock-parents = <&topckgen CLK_TOP_SYSPLL1_D2>;
+               mediatek,force-highspeed;
        };
 
        mmc0: mmc@11230000 {