From: Steffen Hemer <s.hemer@xxxxxxxxx>
RTS pin seems to have inverted behavior on am335x, other than expected
with default "rs485-rts-active-high" (instead of low on idle, high on send,
it is the opposite). Transceiver datasheet also suggests a pulldown.
Add includes to pin definitions that are used.
Signed-off-by: Steffen Hemer <s.hemer@xxxxxxxxx>
---
arch/arm/boot/dts/ti/omap/am335x-regor.dtsi | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/ti/omap/am335x-regor.dtsi b/arch/arm/boot/dts/ti/omap/am335x-regor.dtsi
index 625db3bcd365..287d209a0ea9 100644
--- a/arch/arm/boot/dts/ti/omap/am335x-regor.dtsi
+++ b/arch/arm/boot/dts/ti/omap/am335x-regor.dtsi
@@ -5,6 +5,9 @@
*
*/
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/am33xx.h>
+
/ {
model = "Phytec AM335x phyBOARD-REGOR";
compatible = "phytec,am335x-regor", "phytec,am335x-phycore-som", "ti,am33xx";
@@ -188,7 +191,7 @@ uart1_rs485_pins: pinmux-uart1-rs485-pins {
pinctrl-single,pins = <
AM33XX_PADCONF(AM335X_PIN_UART1_RXD, PIN_INPUT_PULLUP, MUX_MODE0)
AM33XX_PADCONF(AM335X_PIN_UART1_TXD, PIN_OUTPUT_PULLDOWN, MUX_MODE0)
- AM33XX_PADCONF(AM335X_PIN_UART1_RTSN, PIN_OUTPUT_PULLUP, MUX_MODE0)
+ AM33XX_PADCONF(AM335X_PIN_UART1_RTSN, PIN_OUTPUT_PULLDOWN, MUX_MODE0)
>;
};
};
@@ -198,4 +201,9 @@ &uart1 {
pinctrl-0 = <&uart1_rs485_pins>;
status = "okay";
linux,rs485-enabled-at-boot-time;
+ /*
+ * un-intuitively, yet with the default (active-high),
+ * am335x RTS is high on idle and gets low on active !
+ */
+ rs485-rts-active-low;
};
--
2.25.1
