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| author | Ji-Ze Hong (Peter Hong) <hpeter@gmail.com> | 2018-01-11 14:47:16 +0800 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2018-01-11 11:00:16 +0100 |
| commit | ee0309b46a20304d30c0e0447a2da2a94115731c (patch) | |
| tree | 2bacbdbd321dafcb6ca2eef00358471d8c8b8538 /drivers/usb/isp1760 | |
| parent | 3aacac02f38543f7a0936fa1e844cd9564b04aaf (diff) | |
| download | blackbird-op-linux-ee0309b46a20304d30c0e0447a2da2a94115731c.tar.gz blackbird-op-linux-ee0309b46a20304d30c0e0447a2da2a94115731c.zip | |
USB: serial: f81534: add auto RTS direction support
The F81532/534 had auto RTS direction support for RS485 mode.
We'll read it from internal Flash with address 0x2f01~0x2f04 for 4 ports.
There are 4 conditions below:
0: F81534_PORT_CONF_RS232.
1: F81534_PORT_CONF_RS485.
2: value error, default to F81534_PORT_CONF_RS232.
3: F81534_PORT_CONF_RS485_INVERT.
F81532/534 Clock register (offset +08h)
Bit0: UART Enable (always on)
Bit2-1: Clock source selector
00: 1.846MHz.
01: 18.46MHz.
10: 24MHz.
11: 14.77MHz.
Bit4: Auto direction(RTS) control (RTS pin Low when TX)
Bit5: Invert direction(RTS) when Bit4 enabled (RTS pin high when TX)
Signed-off-by: Ji-Ze Hong (Peter Hong) <hpeter+linux_kernel@gmail.com>
[ johan: rename mode-mask define, and only use GENMASK() for masks ]
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb/isp1760')
0 files changed, 0 insertions, 0 deletions
