ALSA: oxygen: wait for ACK when resetting UART
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>
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@ -244,6 +244,7 @@ static void _write_uart(struct oxygen *chip, unsigned int port, u8 data)
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void oxygen_reset_uart(struct oxygen *chip)
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{
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_write_uart(chip, 1, MPU401_RESET);
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msleep(1); /* wait for ACK */
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_write_uart(chip, 1, MPU401_ENTER_UART);
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}
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EXPORT_SYMBOL(oxygen_reset_uart);
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