Here some addition elements are needed, but this generic function cuts
down on the amount of code.
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
---
drivers/staging/iio/adc/ad7298.h | 1 -
drivers/staging/iio/adc/ad7298_ring.c | 24 ++++++++----------------
2 files changed, 8 insertions(+), 17 deletions(-)
diff --git a/drivers/staging/iio/adc/ad7298.h b/drivers/staging/iio/adc/ad7298.h
index a0e5dea..5051a7e 100644
--- a/drivers/staging/iio/adc/ad7298.h
+++ b/drivers/staging/iio/adc/ad7298.h
@@ -38,7 +38,6 @@ struct ad7298_platform_data {
struct ad7298_state {
struct spi_device *spi;
struct regulator *reg;
- size_t d_size;
u16 int_vref_mv;
unsigned ext_ref;
struct spi_transfer ring_xfer[10];
diff --git a/drivers/staging/iio/adc/ad7298_ring.c b/drivers/staging/iio/adc/ad7298_ring.c
index feeb0ee..5c13690 100644
--- a/drivers/staging/iio/adc/ad7298_ring.c
+++ b/drivers/staging/iio/adc/ad7298_ring.c
@@ -28,25 +28,17 @@
static int ad7298_ring_preenable(struct iio_dev *indio_dev)
{
struct ad7298_state *st = iio_priv(indio_dev);
- struct iio_buffer *ring = indio_dev->buffer;
- size_t d_size;
int i, m;
unsigned short command;
- int scan_count = bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength);
- d_size = scan_count * (AD7298_STORAGE_BITS / 8);
-
- if (ring->scan_timestamp) {
- d_size += sizeof(s64);
-
- if (d_size % sizeof(s64))
- d_size += sizeof(s64) - (d_size % sizeof(s64));
- }
+ int scan_count, ret;
- if (ring->access->set_bytes_per_datum)
- ring->access->set_bytes_per_datum(ring, d_size);
+ ret = iio_sw_buffer_preenable(indio_dev);
+ if (ret < 0)
+ return ret;
- st->d_size = d_size;
+ /* Now compute overall size */
+ scan_count = bitmap_weight(indio_dev->active_scan_mask,
+ indio_dev->masklength);
command = AD7298_WRITE | st->ext_ref;
@@ -102,7 +94,7 @@ static irqreturn_t ad7298_trigger_handler(int irq, void *p)
if (ring->scan_timestamp) {
time_ns = iio_get_time_ns();
- memcpy((u8 *)buf + st->d_size - sizeof(s64),
+ memcpy((u8 *)buf + indio_dev->scan_bytes - sizeof(s64),
&time_ns, sizeof(time_ns));
}
--
1.7.0.4
--
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