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serial: also set the uartclk value in resume after goes to highspeed

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For any reason if the NS16550A was not work in high speed mode (e.g. we hold
NS16550A from going to high speed mode in autoconfig_16550a()), now we are
resume from suspend, we should also set the uartclk to the correct
value. Otherwise it is still the old 1843200 and that will bring issues.

CC: Greg Kroah-Hartman <greg@kroah.com>
CC: David Woodhouse <dwmw2@infradead.org>
CC: linux-kernel@vger.kernel.org
CC: stable@kernel.org
Signed-off-by: Yin Kangkai <kangkai.yin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Yin Kangkai 2011-02-09 11:34:20 +08:00 committed by Greg Kroah-Hartman
parent 8115be0146
commit 95926d2db6
1 changed files with 1 additions and 0 deletions
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1
drivers/tty/serial/8250.c
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@ -3036,6 +3036,7 @@ void serial8250_resume_port(int line)
serial_outp(up, 0x04, tmp);
serial_outp(up, UART_LCR, 0);
up->port.uartclk = 921600*16;
}
uart_resume_port(&serial8250_reg, &up->port);
}