RE: [EXT] RE: [PATCH v2 2/3] USB: serial: cp210x: Added comments to CRTSCTS flag code.

From: Konstantin Shkolnyy
Date: Tue May 03 2016 - 08:12:03 EST


> -----Original Message-----
> From: linux-usb-owner@xxxxxxxxxxxxxxx [mailto:linux-usb-
> owner@xxxxxxxxxxxxxxx] On Behalf Of David Laight
> Sent: Tuesday, May 03, 2016 04:44
> To: 'Konstantin Shkolnyy'; johan@xxxxxxxxxx
> Cc: linux-usb@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: [EXT] RE: [PATCH v2 2/3] USB: serial: cp210x: Added comments to
> CRTSCTS flag code.
>
> From: Konstantin Shkolnyy
> > Sent: 30 April 2016 03:22
> > Replaced magic numbers used in the CRTSCTS flag code with symbolic
> names
> > from the chip specification.
> >
> > Signed-off-by: Konstantin Shkolnyy <konstantin.shkolnyy@xxxxxxxxx>
> > ---
> > Changes in v2:
> > Improved CRTSCTS fix based on feedback. Dropped get_termios error
> handling.
> >
> > drivers/usb/serial/cp210x.c | 93
> +++++++++++++++++++++++++++++++++------------
> > 1 file changed, 69 insertions(+), 24 deletions(-)
> >
> > diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
> ...
> > +/* cp210x_flow_ctl::ulControlHandshake */
> > +#define SERIAL_DTR_MASK 0x00000003
> > +#define SERIAL_CTS_HANDSHAKE 0x00000008
> > +#define SERIAL_DSR_HANDSHAKE 0x00000010
> > +#define SERIAL_DCD_HANDSHAKE 0x00000020
> > +#define SERIAL_DSR_SENSITIVITY 0x00000040
> ...
>
> I'd have thought the names ought to start CP210X_
>

These names are inherited from the Labs chip spec.