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arm64: dts: rockchip: Fix UART pull-ups on rk3328

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[ Upstream commit 94dad6bed3 ]

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: 52e02d377a ("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>
This commit is contained in:
Chen-Yu Tsai 2020-12-04 14:48:05 +08:00 committed by Greg Kroah-Hartman
parent 4771a82fa0
commit 28cb1d639e
1 changed files with 8 additions and 8 deletions
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16
arch/arm64/boot/dts/rockchip/rk3328.dtsi
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@ -1237,8 +1237,8 @@ otp_out: otp-out {
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 {
@ -1256,8 +1256,8 @@ uart0_rts_pin: uart0-rts-pin {
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 {
@ -1275,15 +1275,15 @@ uart1_rts_pin: uart1-rts-pin {
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>;
};
};