serial: 8250_dw: Set port capabilities based on CPR register

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

The Designware UART has an optional support for 16750
compatible Auto Flow Control. This will enable it based on
the AFCE bit in Component Parameter Register.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

authored by

Heikki Krogerus and committed by

Greg Kroah-Hartman 13 years ago 2920adb6 94b2b47c

1 changed file

expand all

drivers

tty

serial

8250

8250_dw.c

drivers/tty/serial/8250/8250_dw.c

··· 221 221 p->flags |= UPF_FIXED_TYPE; 222 222 p->fifosize = DW_UART_CPR_FIFO_SIZE(reg); 223 223 up->tx_loadsz = p->fifosize; 224 + up->capabilities = UART_CAP_FIFO; 224 225 } 226 + 227 + if (reg & DW_UART_CPR_AFCE_MODE) 228 + up->capabilities |= UART_CAP_AFE; 225 229 } 226 230 227 231 static int dw8250_probe(struct platform_device *pdev)