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[SERIAL] OMAP1510 serial fix for 115200 baud

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The patch below is necessary for 115200 baud on an OMAP1510 internal UART.
It's been in the linux-omap tree for some time and with it applied to a
vanilla Linus git tree the serial console on the Amstrad Delta (which is
OMAP1510 based and whose initial bootloader runs at 115200) works fine (it
doesn't without it).

Signed-off-by: Jonathan McDowell <noodles@earth.li>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Jonathan McDowell 2006-08-14 23:05:32 -07:00 • committed by Russell King
parent 80e3c2b659
commit 255341c6fd
1 changed files with 11 additions and 0 deletions
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11
drivers/serial/8250.c
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@ -1896,6 +1896,17 @@ serial8250_set_termios(struct uart_port *port, struct termios *termios,
serial_outp(up, UART_EFR, efr);
}
#ifdef CONFIG_ARCH_OMAP15XX
/* Workaround to enable 115200 baud on OMAP1510 internal ports */
if (cpu_is_omap1510() && is_omap_port((unsigned int)up->port.membase)) {
if (baud == 115200) {
quot = 1;
serial_out(up, UART_OMAP_OSC_12M_SEL, 1);
} else
serial_out(up, UART_OMAP_OSC_12M_SEL, 0);
}
#endif
if (up->capabilities & UART_NATSEMI) {
/* Switch to bank 2 not bank 1, to avoid resetting EXCR2 */
serial_outp(up, UART_LCR, 0xe0);