diff options
| author | Ji-Ze Hong (Peter Hong) <hpeter@gmail.com> | 2018-01-11 14:47:19 +0800 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2018-01-11 11:00:25 +0100 |
| commit | bb543ca287f5b14a61533f959e3f62ae58890311 (patch) | |
| tree | 016d618f1cec236484443c41e73a71cd8c68a244 /mm/early_ioremap.c | |
| parent | f047d35782553ab862003a58b0fcf7e1b542e4f9 (diff) | |
USB: serial: f81534: add H/W disable port support
The F81532/534 can be disable port by manufacturer with
following H/W design.
1: Connect DCD/DSR/CTS/RI pin to ground.
2: Connect RX pin to ground.
In driver, we'll implements some detect method likes following:
1: Read MSR.
2: Turn MCR LOOP bit on, off and read LSR after delay with 60ms.
It'll contain BREAK status in LSR.
Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'mm/early_ioremap.c')
0 files changed, 0 insertions, 0 deletions