From: Jonathan McDowell 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 Signed-off-by: Andrew Morton --- drivers/serial/8250.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff -puN drivers/serial/8250.c~omap1510-serial-fix-for-115200-baud drivers/serial/8250.c --- a/drivers/serial/8250.c~omap1510-serial-fix-for-115200-baud +++ a/drivers/serial/8250.c @@ -1896,6 +1896,17 @@ serial8250_set_termios(struct uart_port 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); _