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phy: Allow multiple mark bytes before SOM
The specification requires the transmitting devices to allow an equivalent of 2 character time as idle time between packets. It also mentions that it must drive the line to all-high (done by sending 0xFF over the wire) for a minimum of 1 character width. The combination of these two should yield a pause of 2 char, and a mark of 1 char (UART start bit is 0). But some devices my chose to send more than one mark byte and we will be a bit more lenient to allow this. Signed-off-by: Siddharth Chandrasekaran <[email protected]>
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