1. 13 11月, 2005 1 次提交
    • L
      [SERIAL] don't disable xscale serial ports after autoconfig · 5c8c755c
      Lennert Buytenhek 提交于
      xscale-type UARTs have an extra bit (UUE) in the IER register that has
      to be written as 1 to enable the UART.  At the end of autoconfig() in
      drivers/serial/8250.c, the IER register is unconditionally written as
      zero, which turns off the UART, and makes any subsequent printch() hang
      the box.
      
      Since other 8250-type UARTs don't have this enable bit and are thus
      always 'enabled' in this sense, it can't hurt to enable xscale-type
      serial ports all the time as well.  The attached patch changes the
      autoconfig() exit path to see if the port has an UUE enable bit, and if
      yes, to write UUE=1 instead of just putting a zero into IER, using the
      same test as is used at the beginning of serial8250_console_write().
      Signed-off-by: NLennert Buytenhek <buytenh@wantstofly.org>
      Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      5c8c755c
  2. 12 11月, 2005 3 次提交
  3. 11 11月, 2005 36 次提交