This is a note to let you know that I've just added the patch titled
arm64: dts: ti: k3-am642-hummingboard-t: correct rs485 rts polarity
to the 6.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm64-dts-ti-k3-am642-hummingboard-t-correct-rs485-r.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9ae0a8d94cf07eae799304a59272f01a75a899f8
Author: Josua Mayer <josua@xxxxxxxxxxxxx>
Date: Sat May 4 13:35:54 2024 +0200
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 <josua@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240504-ti-rs485-rts-v1-1-e88ef1c96f34@xxxxxxxxxxxxx
Signed-off-by: Vignesh Raghavendra <vigneshr@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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 @@ &main_uart3 {
pinctrl-names = "default";
pinctrl-0 = <&main_uart3_default_pins>;
uart-has-rtscts;
- rs485-rts-active-low;
linux,rs485-enabled-at-boot-time;
status = "okay";
};
