staging: comedi: s626: remove 'my_event_bits' from encoder private data

This array in the encoder private data just makes the driver harder to
follow.

The S626_EVBITS() macro is used to initialize the member in the declaration.
This macro creates a array of four values, based on the encoder channel, that
are used to mask and set the private data 'counter_int_enabs' member. The
values are created using the S626_OVERMASK() and S626_INDXMASK() macros using
the encoder channel number.

Remove the 'my_event_bits' member from the encoder private data as well
as the S626_EVBITS() macro. Refactor the code to use the S626_OVERMASK() and
S626_INDXMASK() macros directly.

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/s626.c b/drivers/staging/comedi/drivers/s626.c
index 6a322e3..13dac54 100644 (file)
--- a/drivers/staging/comedi/drivers/s626.c
+++ b/drivers/staging/comedi/drivers/s626.c
@@ -105,22 +105,11 @@ struct s626_private {
 /* COUNTER OBJECT ------------------------------------------------ */
 struct s626_enc_info {
        int chan;
-
-       uint16_t my_event_bits[4]; /* bit translations for IntSrc -->RDMISC2 */
 };
 
 /* Counter overflow/index event flag masks for RDMISC2. */
 #define S626_INDXMASK(C) (1 << (((C) > 2) ? ((C) * 2 - 1) : ((C) * 2 +  4)))
 #define S626_OVERMASK(C) (1 << (((C) > 2) ? ((C) * 2 + 5) : ((C) * 2 + 10)))
-#define S626_EVBITS(C) { 0, S626_OVERMASK(C), S626_INDXMASK(C), \
-                         S626_OVERMASK(C) | S626_INDXMASK(C) }
-
-/*
- * Translation table to map IntSrc into equivalent RDMISC2 event flag  bits.
- * static const uint16_t s626_event_bits[][4] =
- *     { S626_EVBITS(0), S626_EVBITS(1), S626_EVBITS(2), S626_EVBITS(3),
- *       S626_EVBITS(4), S626_EVBITS(5) };
- */
 
 /*
  * Enable/disable a function or test status bit(s) that are accessed
@@ -949,7 +938,8 @@ static void s626_set_mode_a(struct comedi_device *dev,
         * enable mask to indicate the counter interrupt is disabled.
         */
        if (disable_int_src)
-               devpriv->counter_int_enabs &= ~k->my_event_bits[3];
+               devpriv->counter_int_enabs &= ~(S626_OVERMASK(k->chan) |
+                                               S626_INDXMASK(k->chan));
 
        /*
         * While retaining CounterB and LatchSrc configurations, program the
@@ -1033,7 +1023,8 @@ static void s626_set_mode_b(struct comedi_device *dev,
         * enable mask to indicate the counter interrupt is disabled.
         */
        if (disable_int_src)
-               devpriv->counter_int_enabs &= ~k->my_event_bits[3];
+               devpriv->counter_int_enabs &= ~(S626_OVERMASK(k->chan) |
+                                               S626_INDXMASK(k->chan));
 
        /*
         * While retaining CounterA and LatchSrc configurations, program the
@@ -1174,8 +1165,23 @@ static void s626_set_int_src(struct comedi_device *dev,
        }
 
        /* Update MISC2 interrupt enable mask. */
-       devpriv->counter_int_enabs &= ~k->my_event_bits[3];
-       devpriv->counter_int_enabs |= k->my_event_bits[int_source];
+       devpriv->counter_int_enabs &= ~(S626_OVERMASK(k->chan) |
+                                       S626_INDXMASK(k->chan));
+       switch (int_source) {
+       case 0:
+       default:
+               break;
+       case 1:
+               devpriv->counter_int_enabs |= S626_OVERMASK(k->chan);
+               break;
+       case 2:
+               devpriv->counter_int_enabs |= S626_INDXMASK(k->chan);
+               break;
+       case 3:
+               devpriv->counter_int_enabs |= (S626_OVERMASK(k->chan) |
+                                              S626_INDXMASK(k->chan));
+               break;
+       }
 }
 
 #ifdef unused
@@ -1304,22 +1310,16 @@ static void s626_pulse_index(struct comedi_device *dev,
 static const struct s626_enc_info s626_enc_chan_info[] = {
        {
                .chan                   = 0,
-               .my_event_bits          = S626_EVBITS(0),
        }, {
                .chan                   = 1,
-               .my_event_bits          = S626_EVBITS(1),
        }, {
                .chan                   = 2,
-               .my_event_bits          = S626_EVBITS(2),
        }, {
                .chan                   = 3,
-               .my_event_bits          = S626_EVBITS(3),
        }, {
                .chan                   = 4,
-               .my_event_bits          = S626_EVBITS(4),
        }, {
                .chan                   = 5,
-               .my_event_bits          = S626_EVBITS(5),
        },
 };