3 Commits

Author	SHA1	Message	Date
Johannes Thumshirn	a9977620a4	tty: serial: men_z135_uart: Wakeup UART after transmitting ... Call uart_write_wakeup() after writing the hardware FIFO and updateing the FIFO pointers. This fixes high latency and jitter on PPP over Serial links. Reported-by: Jun Shih <Jun.Shih@pason.com> Tested-by: Jun Shih <Jun.Shih@pason.com> Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-07-09 17:35:42 -07:00
Johannes Thumshirn	10389e6623	tty: serial: men_z135_uart: Don't activate TX Space available IRQ on startup ... Don't activate the TX Space available IRQ on startup, or a simple $ cat /dev/ttyHSU0 will cause an endless amount of IRQs, as there is always space in the TX FIFO available if no data is going to be sent. Also correct comments for IRQ names (RX and TX swapped). Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-05-28 12:27:22 -07:00
Johannes Thumshirn	e264ebf4c8	tty: serial: Add driver for MEN's 16z135 High Speed UART. ... Add driver for MEN's 16z135 High Speed UART. The 16z135 is a memory mapped UART Core on an MCB FPGA and has 1024 byte deep FIFO buffers for the RX and TX path. It also has configurable FIFO fill level IRQs and data copied to and from the hardware has to be acknowledged. Signed-off-by: Johannes Thumshirn <johannes.thumshirn@men.de> Reviewed-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>	2014-04-24 16:24:25 -07:00