staging:iio:adc:ad7606: Use new triggered buffer setup helper function

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@metafoo.de>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/iio/adc/Kconfig

@@ -25,8 +25,7 @@ config AD7606
 	tristate "Analog Devices AD7606 ADC driver"
 	depends on GPIOLIB
 	select IIO_BUFFER
-	select IIO_TRIGGER
-	select IIO_KFIFO_BUF
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Say yes here to build support for Analog Devices:
 	  ad7606, ad7606-6, ad7606-4 analog to digital converters (ADC).

drivers/staging/iio/adc/ad7606_core.c

@@ -533,20 +533,12 @@ struct iio_dev *ad7606_probe(struct device *dev, int irq,
 	if (ret)
 		goto error_free_irq;
 
-	ret = iio_buffer_register(indio_dev,
-				  indio_dev->channels,
-				  indio_dev->num_channels);
-	if (ret)
-		goto error_cleanup_ring;
 	ret = iio_device_register(indio_dev);
 	if (ret)
 		goto error_unregister_ring;
 
 	return indio_dev;
 error_unregister_ring:
-	iio_buffer_unregister(indio_dev);
-
-error_cleanup_ring:
 	ad7606_ring_cleanup(indio_dev);
 
 error_free_irq:
@@ -571,7 +563,6 @@ int ad7606_remove(struct iio_dev *indio_dev, int irq)
 	struct ad7606_state *st = iio_priv(indio_dev);
 
 	iio_device_unregister(indio_dev);
-	iio_buffer_unregister(indio_dev);
 	ad7606_ring_cleanup(indio_dev);
 
 	free_irq(irq, indio_dev);

drivers/staging/iio/adc/ad7606_ring.c

@@ -13,8 +13,8 @@
 
 #include <linux/iio/iio.h>
 #include <linux/iio/buffer.h>
-#include <linux/iio/kfifo_buf.h>
 #include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
 
 #include "ad7606.h"
 
@@ -91,54 +91,18 @@ done:
 	kfree(buf);
 }
 
-static const struct iio_buffer_setup_ops ad7606_ring_setup_ops = {
-	.preenable = &iio_sw_buffer_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
-};
-
 int ad7606_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 {
 	struct ad7606_state *st = iio_priv(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(&ad7606_trigger_handler_th_bh,
-						 &ad7606_trigger_handler_th_bh,
-						 0,
-						 indio_dev,
-						 "%s_consumer%d",
-						 indio_dev->name,
-						 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 = &ad7606_ring_setup_ops;
-	indio_dev->buffer->scan_timestamp = true;
 
 	INIT_WORK(&st->poll_work, &ad7606_poll_bh_to_ring);
 
-	/* 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,
+		&ad7606_trigger_handler_th_bh, &ad7606_trigger_handler_th_bh,
+		NULL);
 }
 
 void ad7606_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);
 }