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staging: comedi: adv_pci1710: change boardinfo 'n_counter' to 'has_counter'

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The 'n_counter' member of the boardinfo is actually a flag indicating that the
board exposes a single channel counter subdevice.

For aesthetics, change the 'n_counter' member to a bit-field flag 'has_counter'
and refactor the board attach accordingly.

Remove the unnecessary initialization of the subdevice 'len_chanlist'. That
member is only used by subdevices that support async commands.

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 2015-01-20 14:52:59 -07:00 committed by Greg Kroah-Hartman
parent d615416de6
commit c5b6b54488
1 changed files with 7 additions and 8 deletions
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15
drivers/staging/comedi/drivers/adv_pci1710.c
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@ -198,7 +198,6 @@ struct boardtype {
int n_aochan; /* num of D/A chans */
int n_dichan; /* num of DI chans */
int n_dochan; /* num of DO chans */
int n_counter; /* num of counters */
int ai_maxdata; /* resolution of A/D */
int ao_maxdata; /* resolution of D/A */
const struct comedi_lrange *rangelist_ai; /* rangelist for A/D */
@ -206,6 +205,7 @@ struct boardtype {
const struct comedi_lrange *rangelist_ao; /* rangelist for D/A */
unsigned int ai_ns_min; /* max sample speed of card v ns */
unsigned int fifo_half_size; /* size of FIFO/2 */
unsigned int has_counter:1;
};
static const struct boardtype boardtypes[] = {
@ -218,7 +218,6 @@ static const struct boardtype boardtypes[] = {
.n_aochan = 2,
.n_dichan = 16,
.n_dochan = 16,
.n_counter = 1,
.ai_maxdata = 0x0fff,
.ao_maxdata = 0x0fff,
.rangelist_ai = &range_pci1710_3,
@ -226,6 +225,7 @@ static const struct boardtype boardtypes[] = {
.rangelist_ao = &range_pci171x_da,
.ai_ns_min = 10000,
.fifo_half_size = 2048,
.has_counter = 1,
},
[BOARD_PCI1710HG] = {
.name = "pci1710hg",
@ -236,7 +236,6 @@ static const struct boardtype boardtypes[] = {
.n_aochan = 2,
.n_dichan = 16,
.n_dochan = 16,
.n_counter = 1,
.ai_maxdata = 0x0fff,
.ao_maxdata = 0x0fff,
.rangelist_ai = &range_pci1710hg,
@ -244,6 +243,7 @@ static const struct boardtype boardtypes[] = {
.rangelist_ao = &range_pci171x_da,
.ai_ns_min = 10000,
.fifo_half_size = 2048,
.has_counter = 1,
},
[BOARD_PCI1711] = {
.name = "pci1711",
@ -253,7 +253,6 @@ static const struct boardtype boardtypes[] = {
.n_aochan = 2,
.n_dichan = 16,
.n_dochan = 16,
.n_counter = 1,
.ai_maxdata = 0x0fff,
.ao_maxdata = 0x0fff,
.rangelist_ai = &range_pci17x1,
@ -261,6 +260,7 @@ static const struct boardtype boardtypes[] = {
.rangelist_ao = &range_pci171x_da,
.ai_ns_min = 10000,
.fifo_half_size = 512,
.has_counter = 1,
},
[BOARD_PCI1713] = {
.name = "pci1713",
@ -1122,7 +1122,7 @@ static int pci1710_auto_attach(struct comedi_device *dev,
n_subdevices++;
if (this_board->n_dochan)
n_subdevices++;
if (this_board->n_counter)
if (this_board->has_counter)
n_subdevices++;
ret = comedi_alloc_subdevices(dev, n_subdevices);
@ -1205,12 +1205,11 @@ static int pci1710_auto_attach(struct comedi_device *dev,
subdev++;
}
if (this_board->n_counter) {
if (this_board->has_counter) {
s = &dev->subdevices[subdev];
s->type = COMEDI_SUBD_COUNTER;
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
s->n_chan = this_board->n_counter;
s->len_chanlist = this_board->n_counter;
s->n_chan = 1;
s->maxdata = 0xffff;
s->range_table = &range_unknown;
s->insn_read = pci171x_insn_counter_read;