tree d5f471e4bead7804b6db1ce7ab3b7a48ad795289
parent ded2f295a36d17838fe97e80d7b6ea83381474f8
author Stephen Hurd <shurd@broadcom.com> 1358460893 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1358460175 -0800

8250/16?50: Add support for Broadcom TruManage redirected serial port

Add support for the UART device present in Broadcom TruManage capable
NetXtreme chips (ie: 5761m 5762, and 5725).

This implementation has a hidden transmit FIFO, so running in single-byte
interrupt mode results in too many interrupts.  The UART_CAP_HFIFO
capability was added to track this.  It continues to reload the THR as long
as the THRE and TSRE bits are set in the LSR up to a specified limit (1024
is used here).

Signed-off-by: Stephen Hurd <shurd@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>