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Subject[PATCH 2.6.12 1/2] Altix ioc4 serial - set hfc from ioctl
Allow hardware flow control to be set from an ioctl.

Signed-off-by: Patrick Gefre <pfg@sgi.com>



Index: linux-2.5-ioc4/drivers/serial/ioc4_serial.c
===================================================================
--- linux-2.5-ioc4.orig/drivers/serial/ioc4_serial.c 2005-03-24 13:54:30.657706924 -0600
+++ linux-2.5-ioc4/drivers/serial/ioc4_serial.c 2005-03-24 13:56:48.230417236 -0600
@@ -1765,8 +1765,11 @@
the_port->ignore_status_mask &= ~N_DATA_READY;
}

- if (cflag & CRTSCTS)
+ if (cflag & CRTSCTS) {
info->flags |= ASYNC_CTS_FLOW;
+ port->ip_sscr |= IOC4_SSCR_HFC_EN;
+ writel(port->ip_sscr, &port->ip_serial_regs->sscr);
+ }
else
info->flags &= ~ASYNC_CTS_FLOW;

@@ -1825,12 +1828,6 @@
/* set the speed of the serial port */
ioc4_change_speed(the_port, info->tty->termios, (struct termios *)0);

- /* enable hardware flow control - after ioc4_change_speed because
- * ASYNC_CTS_FLOW is set there */
- if (info->flags & ASYNC_CTS_FLOW) {
- port->ip_sscr |= IOC4_SSCR_HFC_EN;
- writel(port->ip_sscr, &port->ip_serial_regs->sscr);
- }
info->flags |= UIF_INITIALIZED;
return 0;
}
--

-
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