The "hr" type boards have 16-bit analog inputs and outputs. All other board
types are 12-bit.
Replace the 'resolution' member of the boardinfo with a bit-field flag,
'is_16bit', and only set it for the 16-bit boards. Remove the unnecessary
initialization for the 12-bit boards.
Signed-off-by: H Hartley Sweeten <hsweeten@xxxxxxxxxxxxxxxxxxx>
Cc: Ian Abbott <abbotti@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/comedi/drivers/das1800.c | 28 +++++++---------------------
1 file changed, 7 insertions(+), 21 deletions(-)
diff --git a/drivers/staging/comedi/drivers/das1800.c b/drivers/staging/comedi/drivers/das1800.c
index 324d1cc..6067b57 100644
--- a/drivers/staging/comedi/drivers/das1800.c
+++ b/drivers/staging/comedi/drivers/das1800.c
@@ -204,11 +204,11 @@ static const struct comedi_lrange range_ai_das1802 = {
struct das1800_board {
const char *name;
int ai_speed; /* max conversion period in nanoseconds */
- int resolution; /* bits of ai resolution */
int do_n_chan; /* number of digital output channels */
int ao_ability; /* 0 == no analog out, 1 == basic analog out, 2 == waveform analog out */
int ao_n_chan; /* number of analog out channels */
const struct comedi_lrange *range_ai; /* available input ranges */
+ unsigned int is_16bit:1;
unsigned int has_64_ai_chan:1;
};
@@ -220,13 +220,11 @@ static const struct das1800_board das1800_boards[] = {
{
.name = "das-1701st",
.ai_speed = 6250,
- .resolution = 12,
.do_n_chan = 4,
.range_ai = &range_ai_das1801,
}, {
.name = "das-1701st-da",
.ai_speed = 6250,
- .resolution = 12,
.do_n_chan = 4,
.ao_ability = 1,
.ao_n_chan = 4,
@@ -234,13 +232,11 @@ static const struct das1800_board das1800_boards[] = {
}, {
.name = "das-1702st",
.ai_speed = 6250,
- .resolution = 12,
.do_n_chan = 4,
.range_ai = &range_ai_das1802,
}, {
.name = "das-1702st-da",
.ai_speed = 6250,
- .resolution = 12,
.do_n_chan = 4,
.ao_ability = 1,
.ao_n_chan = 4,
@@ -248,21 +244,20 @@ static const struct das1800_board das1800_boards[] = {
}, {
.name = "das-1702hr",
.ai_speed = 20000,
- .resolution = 16,
.do_n_chan = 4,
.range_ai = &range_ai_das1802,
+ .is_16bit = 1,
}, {
.name = "das-1702hr-da",
.ai_speed = 20000,
- .resolution = 16,
.do_n_chan = 4,
.ao_ability = 1,
.ao_n_chan = 2,
.range_ai = &range_ai_das1802,
+ .is_16bit = 1,
}, {
.name = "das-1701ao",
.ai_speed = 6250,
- .resolution = 12,
.do_n_chan = 4,
.ao_ability = 2,
.ao_n_chan = 2,
@@ -270,7 +265,6 @@ static const struct das1800_board das1800_boards[] = {
}, {
.name = "das-1702ao",
.ai_speed = 6250,
- .resolution = 12,
.do_n_chan = 4,
.ao_ability = 2,
.ao_n_chan = 2,
@@ -278,13 +272,11 @@ static const struct das1800_board das1800_boards[] = {
}, {
.name = "das-1801st",
.ai_speed = 3000,
- .resolution = 12,
.do_n_chan = 4,
.range_ai = &range_ai_das1801,
}, {
.name = "das-1801st-da",
.ai_speed = 3000,
- .resolution = 12,
.do_n_chan = 4,
.ao_ability = 1,
.ao_n_chan = 4,
@@ -292,13 +284,11 @@ static const struct das1800_board das1800_boards[] = {
}, {
.name = "das-1802st",
.ai_speed = 3000,
- .resolution = 12,
.do_n_chan = 4,
.range_ai = &range_ai_das1802,
}, {
.name = "das-1802st-da",
.ai_speed = 3000,
- .resolution = 12,
.do_n_chan = 4,
.ao_ability = 1,
.ao_n_chan = 4,
@@ -306,21 +296,20 @@ static const struct das1800_board das1800_boards[] = {
}, {
.name = "das-1802hr",
.ai_speed = 10000,
- .resolution = 16,
.do_n_chan = 4,
.range_ai = &range_ai_das1802,
+ .is_16bit = 1,
}, {
.name = "das-1802hr-da",
.ai_speed = 10000,
- .resolution = 16,
.do_n_chan = 4,
.ao_ability = 1,
.ao_n_chan = 2,
.range_ai = &range_ai_das1802,
+ .is_16bit = 1,
}, {
.name = "das-1801hc",
.ai_speed = 3000,
- .resolution = 12,
.do_n_chan = 8,
.ao_ability = 1,
.ao_n_chan = 2,
@@ -329,7 +318,6 @@ static const struct das1800_board das1800_boards[] = {
}, {
.name = "das-1802hc",
.ai_speed = 3000,
- .resolution = 12,
.do_n_chan = 8,
.ao_ability = 1,
.ao_n_chan = 2,
@@ -338,7 +326,6 @@ static const struct das1800_board das1800_boards[] = {
}, {
.name = "das-1801ao",
.ai_speed = 3000,
- .resolution = 12,
.do_n_chan = 4,
.ao_ability = 2,
.ao_n_chan = 2,
@@ -346,7 +333,6 @@ static const struct das1800_board das1800_boards[] = {
}, {
.name = "das-1802ao",
.ai_speed = 3000,
- .resolution = 12,
.do_n_chan = 4,
.ao_ability = 2,
.ao_n_chan = 2,
@@ -1296,7 +1282,7 @@ static int das1800_attach(struct comedi_device *dev,
if (!board->has_64_ai_chan)
s->subdev_flags |= SDF_COMMON;
s->n_chan = (board->has_64_ai_chan) ? 64 : 16;
- s->maxdata = (1 << board->resolution) - 1;
+ s->maxdata = (board->is_16bit) ? 0xffff : 0x0fff;
s->range_table = board->range_ai;
s->insn_read = das1800_ai_insn_read;
if (dev->irq) {
@@ -1316,7 +1302,7 @@ static int das1800_attach(struct comedi_device *dev,
s->type = COMEDI_SUBD_AO;
s->subdev_flags = SDF_WRITABLE;
s->n_chan = board->ao_n_chan;
- s->maxdata = (1 << board->resolution) - 1;
+ s->maxdata = (board->is_16bit) ? 0xffff : 0x0fff;
s->range_table = &range_bipolar10;
s->insn_write = das1800_ao_insn_write;
} else {
--
2.6.3
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