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ALSA: oxygen: wait for ACK when resetting UART

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After sending a reset command to the UART, wait some time for the ACK to
be generated (and to be read and dropped by the interrupt handler)
before sending the next command.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2008-09-24 15:25:28 +02:00
parent ba8ed1210b
commit cdad5b8db9
1 changed files with 1 additions and 0 deletions
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sound/pci/oxygen/oxygen_io.c
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@ -244,6 +244,7 @@ static void _write_uart(struct oxygen *chip, unsigned int port, u8 data)
void oxygen_reset_uart(struct oxygen *chip)
{
_write_uart(chip, 1, MPU401_RESET);
msleep(1); /* wait for ACK */
_write_uart(chip, 1, MPU401_ENTER_UART);
}
EXPORT_SYMBOL(oxygen_reset_uart);