1 * RS485 serial communications
3 The RTS signal is capable of automatically controlling line direction for
4 the built-in half-duplex mode.
5 The properties described hereafter shall be given to a half-duplex capable
9 - rs485-rts-delay: prop-encoded-array <a b> where:
10 * a is the delay between rts signal and beginning of data sent in milliseconds.
11 it corresponds to the delay before sending data.
12 * b is the delay between end of data sent and rts signal in milliseconds
13 it corresponds to the delay after sending data and actual release of the line.
16 - linux,rs485-enabled-at-boot-time: empty property telling to enable the rs485
17 feature at boot time. It can be disabled later with proper ioctl.
18 - rs485-rx-during-tx: empty property that enables the receiving of data even
21 RS485 example for Atmel USART:
22 usart0: serial@fff8c000 {
23 compatible = "atmel,at91sam9260-usart";
24 reg = <0xfff8c000 0x4000>;
28 linux,rs485-enabled-at-boot-time;
29 rs485-rts-delay = <0 200>; // in milliseconds