The default ns16550 driver does not support rs485. This patchset adds support for half duplex rs485 to the ns16550 driver. Basic handling of the RTS signal is done to enable the rs485 transceivers. Some properties are now parsed from the device tree: - 'linux,rs485-enabled-at-boot-time', enabling RTS toggling when sending data - 'rs485-rts-active-low', inverting the RTS signal - 'rs485-rx-during-tx', enabling RX during TX, disabled by default Pierre-Olivier Huard (2): serial: ns16550: add basic support for rs485 serial: ns16550: add support for half duplex rs485 drivers/serial/serial_ns16550.c | 42 +++++++++++++++++++++++++++++++-- drivers/serial/serial_ns16550.h | 7 ++++++ 2 files changed, 47 insertions(+), 2 deletions(-) -- 2.43.0
