Use the new triggered buffer setup helper function to allocate and register
buffer and pollfunc.
Also as part of the conversion drop scan_timestamp being enabled by default,
since it is a left over of an earlier cleanup.
Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
---
drivers/staging/iio/adc/Kconfig | 1 +
drivers/staging/iio/adc/ad7298.h | 5 +++
drivers/staging/iio/adc/ad7298_core.c | 11 ++----
drivers/staging/iio/adc/ad7298_ring.c | 62 +++++----------------------------
4 files changed, 17 insertions(+), 62 deletions(-)
diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig
index 8958fca..b9ff3d3 100644
--- a/drivers/staging/iio/adc/Kconfig
+++ b/drivers/staging/iio/adc/Kconfig
@@ -13,6 +13,7 @@ config AD7291
config AD7298
tristate "Analog Devices AD7298 ADC driver"
depends on SPI
+ select IIO_TRIGGERED_BUFFER if IIO_BUFFER
help
Say yes here to build support for Analog Devices AD7298
8 Channel ADC with temperature sensor.
diff --git a/drivers/staging/iio/adc/ad7298.h b/drivers/staging/iio/adc/ad7298.h
index 5051a7e..18f2787 100644
--- a/drivers/staging/iio/adc/ad7298.h
+++ b/drivers/staging/iio/adc/ad7298.h
@@ -55,6 +55,8 @@ struct ad7298_state {
#ifdef CONFIG_IIO_BUFFER
int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev);
void ad7298_ring_cleanup(struct iio_dev *indio_dev);
+int ad7298_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *active_scan_mask);
#else /* CONFIG_IIO_BUFFER */
static inline int
@@ -66,5 +68,8 @@ ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev)
static inline void ad7298_ring_cleanup(struct iio_dev *indio_dev)
{
}
+
+#define ad7298_update_scan_mode NULL
+
#endif /* CONFIG_IIO_BUFFER */
#endif /* IIO_ADC_AD7298_H_ */
diff --git a/drivers/staging/iio/adc/ad7298_core.c b/drivers/staging/iio/adc/ad7298_core.c
index c90f2b3..5e68bad 100644
--- a/drivers/staging/iio/adc/ad7298_core.c
+++ b/drivers/staging/iio/adc/ad7298_core.c
@@ -171,6 +171,7 @@ static int ad7298_read_raw(struct iio_dev *indio_dev,
static const struct iio_info ad7298_info = {
.read_raw = &ad7298_read_raw,
+ .update_scan_mode = ad7298_update_scan_mode,
.driver_module = THIS_MODULE,
};
@@ -231,19 +232,12 @@ static int __devinit ad7298_probe(struct spi_device *spi)
if (ret)
goto error_disable_reg;
- ret = iio_buffer_register(indio_dev,
- &ad7298_channels[1], /* skip temp0 */
- ARRAY_SIZE(ad7298_channels) - 1);
- if (ret)
- goto error_cleanup_ring;
ret = iio_device_register(indio_dev);
if (ret)
- goto error_unregister_ring;
+ goto error_cleanup_ring;
return 0;
-error_unregister_ring:
- iio_buffer_unregister(indio_dev);
error_cleanup_ring:
ad7298_ring_cleanup(indio_dev);
error_disable_reg:
@@ -263,7 +257,6 @@ static int __devexit ad7298_remove(struct spi_device *spi)
struct ad7298_state *st = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
- iio_buffer_unregister(indio_dev);
ad7298_ring_cleanup(indio_dev);
if (!IS_ERR(st->reg)) {
regulator_disable(st->reg);
diff --git a/drivers/staging/iio/adc/ad7298_ring.c b/drivers/staging/iio/adc/ad7298_ring.c
index 908a3e5..597a78f 100644
--- a/drivers/staging/iio/adc/ad7298_ring.c
+++ b/drivers/staging/iio/adc/ad7298_ring.c
@@ -19,31 +19,23 @@
#include "ad7298.h"
/**
- * ad7298_ring_preenable() setup the parameters of the ring before enabling
- *
- * The complex nature of the setting of the number of bytes per datum is due
- * to this driver currently ensuring that the timestamp is stored at an 8
- * byte boundary.
+ * ad7298_update_scan_mode() setup the spi transfer buffer for the new scan mask
**/
-static int ad7298_ring_preenable(struct iio_dev *indio_dev)
+int ad7298_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *active_scan_mask)
{
struct ad7298_state *st = iio_priv(indio_dev);
int i, m;
unsigned short command;
- int scan_count, ret;
-
- ret = iio_sw_buffer_preenable(indio_dev);
- if (ret < 0)
- return ret;
+ int scan_count;
/* Now compute overall size */
- scan_count = bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength);
+ scan_count = bitmap_weight(active_scan_mask, indio_dev->masklength);
command = AD7298_WRITE | st->ext_ref;
for (i = 0, m = AD7298_CH(0); i < AD7298_MAX_CHAN; i++, m >>= 1)
- if (test_bit(i, indio_dev->active_scan_mask))
+ if (test_bit(i, active_scan_mask))
command |= m;
st->tx_buf[0] = cpu_to_be16(command);
@@ -108,49 +100,13 @@ static irqreturn_t ad7298_trigger_handler(int irq, void *p)
return IRQ_HANDLED;
}
-static const struct iio_buffer_setup_ops ad7298_ring_setup_ops = {
- .preenable = &ad7298_ring_preenable,
- .postenable = &iio_triggered_buffer_postenable,
- .predisable = &iio_triggered_buffer_predisable,
-};
-
int ad7298_register_ring_funcs_and_init(struct iio_dev *indio_dev)
{
- int ret;
-
- indio_dev->buffer = iio_kfifo_allocate(indio_dev);
- if (!indio_dev->buffer) {
- ret = -ENOMEM;
- goto error_ret;
- }
- indio_dev->pollfunc = iio_alloc_pollfunc(NULL,
- &ad7298_trigger_handler,
- IRQF_ONESHOT,
- indio_dev,
- "ad7298_consumer%d",
- indio_dev->id);
-
- if (indio_dev->pollfunc == NULL) {
- ret = -ENOMEM;
- goto error_deallocate_kfifo;
- }
-
- /* Ring buffer functions - here trigger setup related */
- indio_dev->setup_ops = &ad7298_ring_setup_ops;
- indio_dev->buffer->scan_timestamp = true;
-
- /* Flag that polled ring buffering is possible */
- indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
- return 0;
-
-error_deallocate_kfifo:
- iio_kfifo_free(indio_dev->buffer);
-error_ret:
- return ret;
+ return iio_triggered_buffer_setup(indio_dev, NULL,
+ &ad7298_trigger_handler, NULL);
}
void ad7298_ring_cleanup(struct iio_dev *indio_dev)
{
- iio_dealloc_pollfunc(indio_dev->pollfunc);
- iio_kfifo_free(indio_dev->buffer);
+ iio_triggered_buffer_cleanup(indio_dev);
}
--
1.7.10
--
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