6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Josua Mayer <josua@xxxxxxxxxxxxx>
[ 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>
---
arch/arm64/boot/dts/ti/k3-am642-hummingboard-t.dts | 1 -
1 file changed, 1 deletion(-)
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";
};
--
2.43.0
