From: Chen-Yu Tsai wens@csie.org
[ Upstream commit 94dad6bed3c86c00050bf7c2b2ad6b630facae31 ]
For UARTs, the local pull-ups should be on the RX pin, not the TX pin. UARTs transmit active-low, so a disconnected RX pin should be pulled high instead of left floating to prevent noise being interpreted as transmissions.
This gets rid of bogus sysrq events when the UART console is not connected.
Fixes: 52e02d377a72 ("arm64: dts: rockchip: add core dtsi file for RK3328 SoCs") Signed-off-by: Chen-Yu Tsai wens@csie.org Link: https://lore.kernel.org/r/20201204064805.6480-1-wens@kernel.org Signed-off-by: Heiko Stuebner heiko@sntech.de Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/rockchip/rk3328.dtsi | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3328.dtsi b/arch/arm64/boot/dts/rockchip/rk3328.dtsi index 31cc1541f1f59..e0ed323935a4d 100644 --- a/arch/arm64/boot/dts/rockchip/rk3328.dtsi +++ b/arch/arm64/boot/dts/rockchip/rk3328.dtsi @@ -1190,8 +1190,8 @@
uart0 { uart0_xfer: uart0-xfer { - rockchip,pins = <1 RK_PB1 1 &pcfg_pull_up>, - <1 RK_PB0 1 &pcfg_pull_none>; + rockchip,pins = <1 RK_PB1 1 &pcfg_pull_none>, + <1 RK_PB0 1 &pcfg_pull_up>; };
uart0_cts: uart0-cts { @@ -1209,8 +1209,8 @@
uart1 { uart1_xfer: uart1-xfer { - rockchip,pins = <3 RK_PA4 4 &pcfg_pull_up>, - <3 RK_PA6 4 &pcfg_pull_none>; + rockchip,pins = <3 RK_PA4 4 &pcfg_pull_none>, + <3 RK_PA6 4 &pcfg_pull_up>; };
uart1_cts: uart1-cts { @@ -1228,15 +1228,15 @@
uart2-0 { uart2m0_xfer: uart2m0-xfer { - rockchip,pins = <1 RK_PA0 2 &pcfg_pull_up>, - <1 RK_PA1 2 &pcfg_pull_none>; + rockchip,pins = <1 RK_PA0 2 &pcfg_pull_none>, + <1 RK_PA1 2 &pcfg_pull_up>; }; };
uart2-1 { uart2m1_xfer: uart2m1-xfer { - rockchip,pins = <2 RK_PA0 1 &pcfg_pull_up>, - <2 RK_PA1 1 &pcfg_pull_none>; + rockchip,pins = <2 RK_PA0 1 &pcfg_pull_none>, + <2 RK_PA1 1 &pcfg_pull_up>; }; };