diff options
| author | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-06-02 16:39:11 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-06-02 16:39:11 +0100 |
| commit | 1c3f45ab2f7f879ea482501c83899505c31f7539 (patch) | |
| tree | 672465b3b9b3e2e26a8caf74ed64aa6885c52c13 /drivers/serial/8250.c | |
| parent | 4bcff1b37e7c3aed914d1ce5b45994adc7dbf455 (diff) | |
| parent | e0d6d71440a3a35c6fc2dde09f8e8d4d7bd44dda (diff) | |
Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Diffstat (limited to 'drivers/serial/8250.c')
| -rw-r--r-- | drivers/serial/8250.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c index 3bbf0cc6e53..30e8beb7143 100644 --- a/drivers/serial/8250.c +++ b/drivers/serial/8250.c @@ -682,8 +682,6 @@ static void autoconfig_16550a(struct uart_8250_port *up) * from EXCR1. Switch back to bank 0, change it in MCR. Then * switch back to bank 2, read it from EXCR1 again and check * it's changed. If so, set baud_base in EXCR2 to 921600. -- dwmw2 - * On PowerPC we don't want to change baud_base, as we have - * a number of different divisors. -- Tom Rini */ serial_outp(up, UART_LCR, 0); status1 = serial_in(up, UART_MCR); @@ -699,16 +697,25 @@ static void autoconfig_16550a(struct uart_8250_port *up) serial_outp(up, UART_MCR, status1); if ((status2 ^ status1) & UART_MCR_LOOP) { -#ifndef CONFIG_PPC + unsigned short quot; + serial_outp(up, UART_LCR, 0xE0); + + quot = serial_inp(up, UART_DLM) << 8; + quot += serial_inp(up, UART_DLL); + quot <<= 3; + status1 = serial_in(up, 0x04); /* EXCR1 */ status1 &= ~0xB0; /* Disable LOCK, mask out PRESL[01] */ status1 |= 0x10; /* 1.625 divisor for baud_base --> 921600 */ serial_outp(up, 0x04, status1); + + serial_outp(up, UART_DLL, quot & 0xff); + serial_outp(up, UART_DLM, quot >> 8); + serial_outp(up, UART_LCR, 0); - up->port.uartclk = 921600*16; -#endif + up->port.uartclk = 921600*16; up->port.type = PORT_NS16550A; up->capabilities |= UART_NATSEMI; return; |