UART3 & 4 are both RS485 ports.
So we need to configure and enable this by default.
Signed-off-by: Mark Jackson <mpfj@xxxxxxxxxxxxx>
---
arch/arm/boot/dts/am335x-nano.dts | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/arch/arm/boot/dts/am335x-nano.dts b/arch/arm/boot/dts/am335x-nano.dts
index 05cbfe24f778..cecc2afaeff4 100644
--- a/arch/arm/boot/dts/am335x-nano.dts
+++ b/arch/arm/boot/dts/am335x-nano.dts
@@ -187,12 +187,22 @@ &uart2 {
&uart3 {
pinctrl-names = "default";
pinctrl-0 = <&uart3_pins>;
+ rts-gpio = <&gpio2 17 GPIO_ACTIVE_HIGH>;
+ rs485-rts-active-high;
+ rs485-rx-during-tx;
+ rs485-rts-delay = <1 1>;
+ linux,rs485-enabled-at-boot-time;
status = "okay";
};
&uart4 {
pinctrl-names = "default";
pinctrl-0 = <&uart4_pins>;
+ rts-gpio = <&gpio0 9 GPIO_ACTIVE_HIGH>;
+ rs485-rts-active-high;
+ rs485-rx-during-tx;
+ rs485-rts-delay = <1 1>;
+ linux,rs485-enabled-at-boot-time;
status = "okay";
};
--
2.34.1
