Some 8250-variants control the direction pin for RS485 in hardware. Linux has RS485 support these days, so update the 8250-driver to adhere to that. There have been attempts for mainlining this before. So, I started with the version from Matthias which got no further comments, a proof-of-concept for the 16V2750 from Jürgen, and reworked it to match the current state of RS485 in Linux. Some minor cleanup patches came along the way. Really looking forward to comments/tags, because I think it is really time to get this functionality into mainline once and for all ;) Code is based on 3.2-rc2, tested on a OMAP-based custom board with a 16V2750. A git tree can be found here: git://git.pengutronix.de/git/wsa/linux-2.6.git 8250_rs485 Thanks and regards, Wolfram Matthias Fuchs (1): serial: 8250: Add ioctl to enable auto rs485 mode with some Exar UARTs Wolfram Sang (7): serial: 8250: replace hardcoded 0xbf with #define serial: 8250: save rs485_flags per instance serial: 8250: add RX_DURING_TX capability to RS485 mode serial: 8250: reject delaying RTS with RS485 serial: 8250: update rs485 flags with polarity settings serial: 8250: add Exar 16V2750 support serial: 8250: fix comment about accessing EMSR drivers/tty/serial/8250.c | 143 +++++++++++++++++++++++++++++++++++++++--- include/linux/serial_core.h | 3 +- include/linux/serial_reg.h | 4 +- 3 files changed, 137 insertions(+), 13 deletions(-) -- 1.7.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
