Searched hist:bb543ca2 (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/drivers/usb/serial/ |
| H A D | f81534.c | bb543ca2 Thu Jan 11 00:47:19 CST 2018 Ji-Ze Hong (Peter Hong) <hpeter@gmail.com> 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>
bb543ca2 Thu Jan 11 00:47:19 CST 2018 Ji-Ze Hong (Peter Hong) <hpeter@gmail.com> 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>
|