staging: comedi: addi_apci_3xxx: remove 'b_SingleDiff' private data

The analog reference desired for the acquisition is stored in the
insn->chanspec that is passed to the (*insn_read) function. There is
no need to use a private data variable to hold the desired analog
reference that is set in the (*insn_config).

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>

diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3xxx.c b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3xxx.c
index ce4c41f..bea5723 100644 (file)
--- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3xxx.c
+++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci3xxx.c
@@ -41,14 +41,10 @@ static int apci3xxx_ai_configure(struct comedi_device *dev,
 {
        const struct apci3xxx_boardinfo *board = comedi_board(dev);
        struct apci3xxx_private *devpriv = dev->private;
-       unsigned int aref_mode = data[1];
        unsigned int time_base = data[2];
        unsigned int reload_time = data[3];
        unsigned int acq_ns;
 
-       if (aref_mode != 0 && aref_mode != 1)
-               return -EINVAL;
-
        if (time_base > 2)
                return -EINVAL;
 
@@ -80,7 +76,6 @@ static int apci3xxx_ai_configure(struct comedi_device *dev,
 
        devpriv->ui_EocEosConversionTime = reload_time;
        devpriv->b_EocEosConversionTimeBase = time_base;
-       devpriv->b_SingelDiff = aref_mode;
 
        /* Set the convert timing unit */
        writel(time_base, devpriv->mmio + 36);
@@ -116,6 +111,7 @@ static int apci3xxx_ai_insn_read(struct comedi_device *dev,
        struct apci3xxx_private *devpriv = dev->private;
        unsigned int chan = CR_CHAN(insn->chanspec);
        unsigned int range = CR_RANGE(insn->chanspec);
+       unsigned int aref = CR_AREF(insn->chanspec);
        unsigned char use_interrupt = 0;        /* FIXME: use interrupts */
        unsigned int delay_mode;
        unsigned int val;
@@ -139,7 +135,7 @@ static int apci3xxx_ai_insn_read(struct comedi_device *dev,
 
        /* Make the configuration */
        val = (range & 3) | ((range >> 2) << 6) |
-             (devpriv->b_SingelDiff << 7);
+             ((aref == AREF_DIFF) << 7);
        writel(val, devpriv->mmio + 0);
 
        /* Channel selection */

diff --git a/drivers/staging/comedi/drivers/addi_apci_3xxx.c b/drivers/staging/comedi/drivers/addi_apci_3xxx.c
index bb62c87..b724cf6 100644 (file)
--- a/drivers/staging/comedi/drivers/addi_apci_3xxx.c
+++ b/drivers/staging/comedi/drivers/addi_apci_3xxx.c
@@ -356,7 +356,6 @@ struct apci3xxx_private {
        unsigned char b_EocEosInterrupt;
        unsigned int ui_EocEosConversionTime;
        unsigned char b_EocEosConversionTimeBase;
-       unsigned char b_SingelDiff;
 };
 
 #include "addi-data/hwdrv_apci3xxx.c"
@@ -611,9 +610,6 @@ static int apci3xxx_auto_attach(struct comedi_device *dev,
                s->insn_config = apci3xxx_ai_insn_config;
                s->insn_read = apci3xxx_ai_insn_read;
 
-               if ((board->ai_subdev_flags & (SDF_COMMON | SDF_GROUND)) == 0)
-                       devpriv->b_SingelDiff = 1;
-
        } else {
                s->type = COMEDI_SUBD_UNUSED;
        }