staging:iio:adc:ad7887: Use new triggered buffer setup helper function

Use the new triggered buffer setup helper function to allocate and register
buffer and pollfunc.
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

@@ -86,8 +86,7 @@ config AD7887
 	tristate "Analog Devices AD7887 ADC driver"
 	depends on SPI
 	select IIO_BUFFER
-	select IIO_KFIFO_BUF
-	select IIO_TRIGGER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Say yes here to build support for Analog Devices
 	  AD7887 SPI analog to digital converter (ADC).

drivers/staging/iio/adc/ad7887_core.c

@@ -201,20 +201,12 @@ static int __devinit ad7887_probe(struct spi_device *spi)
 	if (ret)
 		goto error_disable_reg;
 
-	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 0;
 error_unregister_ring:
-	iio_buffer_unregister(indio_dev);
-error_cleanup_ring:
 	ad7887_ring_cleanup(indio_dev);
 error_disable_reg:
 	if (!IS_ERR(st->reg))
@@ -233,7 +225,6 @@ static int ad7887_remove(struct spi_device *spi)
 	struct ad7887_state *st = iio_priv(indio_dev);
 
 	iio_device_unregister(indio_dev);
-	iio_buffer_unregister(indio_dev);
 	ad7887_ring_cleanup(indio_dev);
 	if (!IS_ERR(st->reg)) {
 		regulator_disable(st->reg);

drivers/staging/iio/adc/ad7887_ring.c

@@ -14,8 +14,8 @@
 
 #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 "ad7887.h"
 
@@ -112,38 +112,11 @@ static const struct iio_buffer_setup_ops ad7887_ring_setup_ops = {
 
 int ad7887_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(&iio_pollfunc_store_time,
-						 &ad7887_trigger_handler,
-						 IRQF_ONESHOT,
-						 indio_dev,
-						 "ad7887_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 = &ad7887_ring_setup_ops;
-
-	/* 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, &iio_pollfunc_store_time,
+			&ad7887_trigger_handler, &ad7887_ring_setup_ops);
 }
 
 void ad7887_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);
 }