* [PATCH] ARM: dts: imx6ul-kontron-bl-common: Fix RTS polarity for RS485 interface
@ 2025-07-08 12:24 Frieder Schrempf
2025-07-11 8:05 ` Shawn Guo
0 siblings, 1 reply; 2+ messages in thread
From: Frieder Schrempf @ 2025-07-08 12:24 UTC (permalink / raw)
To: linux-arm-kernel, Conor Dooley, devicetree, Fabio Estevam,
Frieder Schrempf, imx, Krzysztof Kozlowski, linux-kernel,
Rob Herring, Sascha Hauer, Shawn Guo
Cc: Annette Kobou, Krzysztof Kozlowski, Pengutronix Kernel Team
From: Annette Kobou <annette.kobou@kontron.de>
The polarity of the DE signal of the transceiver is active-high for
sending. Therefore rs485-rts-active-low is wrong and needs to be
removed to make RS485 transmissions work.
Signed-off-by: Annette Kobou <annette.kobou@kontron.de>
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Fixes: 1ea4b76cdfde ("ARM: dts: imx6ul-kontron-n6310: Add Kontron i.MX6UL N6310 SoM and boards")
---
arch/arm/boot/dts/nxp/imx/imx6ul-kontron-bl-common.dtsi | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm/boot/dts/nxp/imx/imx6ul-kontron-bl-common.dtsi b/arch/arm/boot/dts/nxp/imx/imx6ul-kontron-bl-common.dtsi
index 29d2f86d5e34a..f4c45e964daf8 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6ul-kontron-bl-common.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6ul-kontron-bl-common.dtsi
@@ -168,7 +168,6 @@ &uart2 {
pinctrl-0 = <&pinctrl_uart2>;
linux,rs485-enabled-at-boot-time;
rs485-rx-during-tx;
- rs485-rts-active-low;
uart-has-rtscts;
status = "okay";
};
--
2.50.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ARM: dts: imx6ul-kontron-bl-common: Fix RTS polarity for RS485 interface
2025-07-08 12:24 [PATCH] ARM: dts: imx6ul-kontron-bl-common: Fix RTS polarity for RS485 interface Frieder Schrempf
@ 2025-07-11 8:05 ` Shawn Guo
0 siblings, 0 replies; 2+ messages in thread
From: Shawn Guo @ 2025-07-11 8:05 UTC (permalink / raw)
To: Frieder Schrempf
Cc: linux-arm-kernel, Conor Dooley, devicetree, Fabio Estevam,
Frieder Schrempf, imx, Krzysztof Kozlowski, linux-kernel,
Rob Herring, Sascha Hauer, Shawn Guo, Annette Kobou,
Krzysztof Kozlowski, Pengutronix Kernel Team
On Tue, Jul 08, 2025 at 02:24:41PM +0200, Frieder Schrempf wrote:
> From: Annette Kobou <annette.kobou@kontron.de>
>
> The polarity of the DE signal of the transceiver is active-high for
> sending. Therefore rs485-rts-active-low is wrong and needs to be
> removed to make RS485 transmissions work.
>
> Signed-off-by: Annette Kobou <annette.kobou@kontron.de>
> Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
> Fixes: 1ea4b76cdfde ("ARM: dts: imx6ul-kontron-n6310: Add Kontron i.MX6UL N6310 SoM and boards")
Applied, thanks!
^ permalink raw reply [flat|nested] 2+ messages in thread
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