staging:iio:accel:adis16204 move to chan_spec based setup.

For clean drivers its easier to convert to chan_spec based
registration than to work around the scan_el attributes
going away.

Some minor cleanups done whilst here.

Untested.

V2: used IIO_CHAN macro
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/accel/adis16204.h

@@ -82,7 +82,7 @@ struct adis16204_state {
 	struct mutex			buf_lock;
 };
 
-int adis16204_set_irq(struct device *dev, bool enable);
+int adis16204_set_irq(struct iio_dev *indio_dev, bool enable);
 
 #ifdef CONFIG_IIO_RING_BUFFER
 enum adis16204_scan {
@@ -103,8 +103,6 @@ ssize_t adis16204_read_data_from_ring(struct device *dev,
 int adis16204_configure_ring(struct iio_dev *indio_dev);
 void adis16204_unconfigure_ring(struct iio_dev *indio_dev);
 
-int adis16204_initialize_ring(struct iio_ring_buffer *ring);
-void adis16204_uninitialize_ring(struct iio_ring_buffer *ring);
 #else /* CONFIG_IIO_RING_BUFFER */
 
 static inline void adis16204_remove_trigger(struct iio_dev *indio_dev)
@@ -133,14 +131,5 @@ static inline void adis16204_unconfigure_ring(struct iio_dev *indio_dev)
 {
 }
 
-static inline int adis16204_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return 0;
-}
-
-static inline void adis16204_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-}
-
 #endif /* CONFIG_IIO_RING_BUFFER */
 #endif /* SPI_ADIS16204_H_ */

drivers/staging/iio/accel/adis16204_ring.c

@@ -17,44 +17,6 @@
 #include "../trigger.h"
 #include "adis16204.h"
 
-static IIO_SCAN_EL_C(in_supply, ADIS16204_SCAN_SUPPLY, ADIS16204_SUPPLY_OUT, NULL);
-static IIO_CONST_ATTR_SCAN_EL_TYPE(in_supply, u, 12, 16);
-static IIO_SCAN_EL_C(accel_x, ADIS16204_SCAN_ACC_X, ADIS16204_XACCL_OUT, NULL);
-static IIO_SCAN_EL_C(accel_y, ADIS16204_SCAN_ACC_Y, ADIS16204_YACCL_OUT, NULL);
-static IIO_CONST_ATTR_SCAN_EL_TYPE(accel, s, 14, 16);
-static IIO_SCAN_EL_C(in0, ADIS16204_SCAN_AUX_ADC, ADIS16204_AUX_ADC, NULL);
-static IIO_CONST_ATTR_SCAN_EL_TYPE(in0, u, 12, 16);
-static IIO_SCAN_EL_C(temp, ADIS16204_SCAN_TEMP, ADIS16204_TEMP_OUT, NULL);
-static IIO_CONST_ATTR_SCAN_EL_TYPE(temp, u, 12, 16);
-static IIO_SCAN_EL_TIMESTAMP(5);
-static IIO_CONST_ATTR_SCAN_EL_TYPE(timestamp, s, 64, 64);
-
-static struct attribute *adis16204_scan_el_attrs[] = {
-	&iio_scan_el_in_supply.dev_attr.attr,
-	&iio_const_attr_in_supply_index.dev_attr.attr,
-	&iio_const_attr_in_supply_type.dev_attr.attr,
-	&iio_scan_el_accel_x.dev_attr.attr,
-	&iio_const_attr_accel_x_index.dev_attr.attr,
-	&iio_scan_el_accel_y.dev_attr.attr,
-	&iio_const_attr_accel_y_index.dev_attr.attr,
-	&iio_const_attr_accel_type.dev_attr.attr,
-	&iio_scan_el_in0.dev_attr.attr,
-	&iio_const_attr_in0_index.dev_attr.attr,
-	&iio_const_attr_in0_type.dev_attr.attr,
-	&iio_scan_el_temp.dev_attr.attr,
-	&iio_const_attr_temp_index.dev_attr.attr,
-	&iio_const_attr_temp_type.dev_attr.attr,
-	&iio_scan_el_timestamp.dev_attr.attr,
-	&iio_const_attr_timestamp_index.dev_attr.attr,
-	&iio_const_attr_timestamp_type.dev_attr.attr,
-	NULL,
-};
-
-static struct attribute_group adis16204_scan_el_group = {
-	.attrs = adis16204_scan_el_attrs,
-	.name = "scan_elements",
-};
-
 /**
  * adis16204_read_ring_data() read data registers which will be placed into ring
  * @dev: device associated with child of actual device (iio_dev or iio_trig)
@@ -80,7 +42,8 @@ static int adis16204_read_ring_data(struct device *dev, u8 *rx)
 		xfers[i].len = 2;
 		xfers[i].delay_usecs = 20;
 		xfers[i].tx_buf = st->tx + 2 * i;
-		st->tx[2 * i] = ADIS16204_READ_REG(ADIS16204_SUPPLY_OUT + 2 * i);
+		st->tx[2 * i]
+			= ADIS16204_READ_REG(ADIS16204_SUPPLY_OUT + 2 * i);
 		st->tx[2 * i + 1] = 0;
 		if (i >= 1)
 			xfers[i].rx_buf = rx + 2 * (i - 1);
@@ -154,7 +117,6 @@ int adis16204_configure_ring(struct iio_dev *indio_dev)
 	/* Effectively select the ring buffer implementation */
 	iio_ring_sw_register_funcs(&ring->access);
 	ring->bpe = 2;
-	ring->scan_el_attrs = &adis16204_scan_el_group;
 	ring->scan_timestamp = true;
 	ring->preenable = &iio_sw_ring_preenable;
 	ring->postenable = &iio_triggered_ring_postenable;
@@ -162,11 +124,11 @@ int adis16204_configure_ring(struct iio_dev *indio_dev)
 	ring->owner = THIS_MODULE;
 
 	/* Set default scan mode */
-	iio_scan_mask_set(ring, iio_scan_el_in_supply.number);
-	iio_scan_mask_set(ring, iio_scan_el_accel_x.number);
-	iio_scan_mask_set(ring, iio_scan_el_accel_y.number);
-	iio_scan_mask_set(ring, iio_scan_el_temp.number);
-	iio_scan_mask_set(ring, iio_scan_el_in0.number);
+	iio_scan_mask_set(ring, ADIS16204_SCAN_SUPPLY);
+	iio_scan_mask_set(ring, ADIS16204_SCAN_ACC_X);
+	iio_scan_mask_set(ring, ADIS16204_SCAN_ACC_Y);
+	iio_scan_mask_set(ring, ADIS16204_SCAN_AUX_ADC);
+	iio_scan_mask_set(ring, ADIS16204_SCAN_TEMP);
 
 	indio_dev->pollfunc = kzalloc(sizeof(*indio_dev->pollfunc), GFP_KERNEL);
 	if (indio_dev->pollfunc == NULL) {
@@ -193,13 +155,3 @@ int adis16204_configure_ring(struct iio_dev *indio_dev)
 	iio_sw_rb_free(indio_dev->ring);
 	return ret;
 }
-
-int adis16204_initialize_ring(struct iio_ring_buffer *ring)
-{
-	return iio_ring_buffer_register(ring, 0);
-}
-
-void adis16204_uninitialize_ring(struct iio_ring_buffer *ring)
-{
-	iio_ring_buffer_unregister(ring);
-}

drivers/staging/iio/accel/adis16204_trigger.c

@@ -33,7 +33,7 @@ static int adis16204_data_rdy_trigger_set_state(struct iio_trigger *trig,
 	struct iio_dev *indio_dev = st->indio_dev;
 
 	dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
-	return adis16204_set_irq(&st->indio_dev->dev, state);
+	return adis16204_set_irq(st->indio_dev, state);
 }
 
 int adis16204_probe_trigger(struct iio_dev *indio_dev)