github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-10-13 13:51:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

ARM: dts: ti: omap: am335x-regor: Fix RS485 settings

Browse Source 
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@phytec.de>
Signed-off-by: Dominik Haller <d.haller@phytec.de>
Link: https://lore.kernel.org/r/20240730092353.10209-1-d.haller@phytec.de
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
This commit is contained in:
Steffen Hemer 2024-07-30 11:23:52 +02:00 committed by Kevin Hilman
parent cf399f182c
commit 65dcab6970
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm/boot/dts/ti/omap/am335x-regor.dtsi
View File

@ -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;
};