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staging: comedi: addi_apci_3120: enable chanlist scanning if needed

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The 'SCAN_ENA' bit in the mode register needs to be set if the chanlist
has more than 1 channel. Set the bit in apci3120_set_chanlist() if needed.
The callers write the mode register after setting any additional bits,

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
H Hartley Sweeten
2014-11-04 10:54:56 -07:00
committed by Greg Kroah-Hartman
parent 1022f64e75
commit fdeb2f5487
1 changed files with 4 additions and 0 deletions
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4
drivers/staging/comedi/drivers/addi_apci_3120.c
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@@ -307,6 +307,10 @@ static void apci3120_set_chanlist(struct comedi_device *dev,
/* set scan length (PR) and scan start (PA) */
devpriv->ctrl = APCI3120_CTRL_PR(n_chan - 1) | APCI3120_CTRL_PA(0);
outw(devpriv->ctrl, dev->iobase + APCI3120_CTRL_REG);
/* enable chanlist scanning if necessary */
if (n_chan > 1)
devpriv->mode |= APCI3120_MODE_SCAN_ENA;
}
#include "addi-data/hwdrv_apci3120.c"