From: Josua Mayer Date: Sat, 4 May 2024 11:35:54 +0000 (+0200) Subject: arm64: dts: ti: k3-am642-hummingboard-t: correct rs485 rts polarity X-Git-Tag: v6.10.3~732 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2ea4abb96f2061617885ded61e16b17cd725feaa;p=thirdparty%2Fkernel%2Fstable.git arm64: dts: ti: k3-am642-hummingboard-t: correct rs485 rts polarity [ Upstream commit 9dcc0e1065f3c40d0b2ad79a858bb4ebaba33167 ] The RS485 transceiver RE (Receiver enable) and DE (Driver enable) are shorted and connected to both RTS/CTS of the SoC UART. RE is active-low, DE is active-high. Remove the "rs485-rts-active-low" flag to match RTS polarity with DE, and fix communication in both transmit and receive directions. Fixes: d60483faf914 ("arm64: dts: add description for solidrun am642 som and evaluation board") Signed-off-by: Josua Mayer Link: https://lore.kernel.org/r/20240504-ti-rs485-rts-v1-1-e88ef1c96f34@solid-run.com Signed-off-by: Vignesh Raghavendra Signed-off-by: Sasha Levin --- diff --git a/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t.dts b/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t.dts index 234d76e4e9445..5b5e9eeec5ac4 100644 --- a/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t.dts +++ b/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t.dts @@ -282,7 +282,6 @@ pinctrl-names = "default"; pinctrl-0 = <&main_uart3_default_pins>; uart-has-rtscts; - rs485-rts-active-low; linux,rs485-enabled-at-boot-time; status = "okay"; };