staging:iio:max1363 - move to channel_spec registration.

V3: move to single chan registration macro. Also introduce some
local macros to greatly reduce code length when setting up the
chan_spec arrays for all the different devices.

V2: update read_raw for two value approach.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/adc/max1363.h

@@ -152,24 +152,24 @@ enum max1363_modes {
 /**
  * struct max1363_chip_info - chip specifc information
  * @name:		indentification string for chip
- * @num_inputs:		number of physical inputs on chip
  * @bits:		accuracy of the adc in bits
  * @int_vref_mv:	the internal reference voltage
  * @monitor_mode:	whether the chip supports monitor interrupts
  * @mode_list:		array of available scan modes
  * @num_modes:		the number of scan modes available
  * @default_mode:	the scan mode in which the chip starts up
+ * @channel:		channel specification
+ * @num_channels:	number of channels
  */
 struct max1363_chip_info {
-	u8				num_inputs;
 	u8				bits;
 	u16				int_vref_mv;
 	bool				monitor_mode;
 	const enum max1363_modes	*mode_list;
 	int				num_modes;
 	enum max1363_modes		default_mode;
-	struct attribute_group		*dev_attrs;
-	struct attribute_group		*scan_attrs;
+	struct iio_chan_spec *channels;
+	int num_channels;
 };
 
 /**

drivers/staging/iio/adc/max1363_ring.c

@@ -199,7 +199,6 @@ int max1363_register_ring_funcs_and_init(struct iio_dev *indio_dev)
 		goto error_deallocate_sw_rb;
 
 	/* Ring buffer functions - here trigger setup related */
-	indio_dev->ring->scan_el_attrs = st->chip_info->scan_attrs;
 	indio_dev->ring->postenable = &iio_triggered_ring_postenable;
 	indio_dev->ring->preenable = &max1363_ring_preenable;
 	indio_dev->ring->predisable = &iio_triggered_ring_predisable;