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staging: comedi: das08: rename DAS08AO_AO_LSB() and DAS08AO_AO_MSB() 

The `DAS08AO_AO_LSB(x)` macro returns the offset to the analog output
low byte register for channel x (0 or 1) for "AOL", "AOM", and "AOH"
boards.  The `DAS08AO_AO_MSB(x)` macro returns the offset to the
corresponding high byte register.  Rename the macros to
`DAS08AOX_AO_LSB_REG(x)` and `DAS08AOX_AO_MSB_REG(x)` respectively, and
add some comments.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2015-06-05 18:30:24 +01:00 committed by Greg Kroah-Hartman
parent f1c04fd421
commit 3c98c1d3f1
1 changed files with 6 additions and 4 deletions
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10
drivers/staging/comedi/drivers/das08.c
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@ -134,8 +134,10 @@
cdef 8255
*/
#define DAS08AO_AO_LSB(x) ((x) ? 0xa : 8)
#define DAS08AO_AO_MSB(x) ((x) ? 0xb : 9)
/* (W) analog output l.s.b. registers for 2 channels ("AOx" boards) */
#define DAS08AOX_AO_LSB_REG(x) ((x) ? 0x0a : 0x08)
/* (W) analog output m.s.b. registers for 2 channels ("AOx" boards) */
#define DAS08AOX_AO_MSB_REG(x) ((x) ? 0x0b : 0x09)
#define DAS08AO_AO_UPDATE 8
/* gainlist same as _pgx_ below */
@ -369,8 +371,8 @@ static void das08_ao_set_data(struct comedi_device *dev,
/* load DACs */
inb(dev->iobase + DAS08JR_AO_UPDATE_REG);
} else {
outb(lsb, dev->iobase + DAS08AO_AO_LSB(chan));
outb(msb, dev->iobase + DAS08AO_AO_MSB(chan));
outb(lsb, dev->iobase + DAS08AOX_AO_LSB_REG(chan));
outb(msb, dev->iobase + DAS08AOX_AO_MSB_REG(chan));
/* load DACs */
inb(dev->iobase + DAS08AO_AO_UPDATE);
}