[PATCH 2/3] staging: iio: dummy: add the timestamp buffer to the scan index enum

[Alison Schofield <amsfield22@gmail.com>]

Replace the hard coded buffer index for IIO_CHAN SOFT_TIMESTAMP with
an entry in the scan index enum.

Signed-off-by: Alison Schofield <amsfield22@gmail.com>
---
 drivers/staging/iio/iio_simple_dummy.c        | 6 +++---
 drivers/staging/iio/iio_simple_dummy.h        | 2 ++
 drivers/staging/iio/iio_simple_dummy_buffer.c | 1 +
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/iio/iio_simple_dummy.c b/drivers/staging/iio/iio_simple_dummy.c
index 70a82cd..2749746 100644
--- a/drivers/staging/iio/iio_simple_dummy.c
+++ b/drivers/staging/iio/iio_simple_dummy.c
@@ -230,10 +230,10 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
 		},
 	},
 	/*
-	 * Convenience macro for timestamps. 4 is the index in
-	 * the buffer.
+	 * Convenience macro for timestamps.
+	 * DUMMY_INDEX_TIMESTAMP is the index in the buffer.
 	 */
-	IIO_CHAN_SOFT_TIMESTAMP(4),
+	IIO_CHAN_SOFT_TIMESTAMP(DUMMY_INDEX_TIMESTAMP),
 	/* DAC channel out_voltage0_raw */
 	{
 		.type = IIO_VOLTAGE,
diff --git a/drivers/staging/iio/iio_simple_dummy.h b/drivers/staging/iio/iio_simple_dummy.h
index b9069a1..89fb650 100644
--- a/drivers/staging/iio/iio_simple_dummy.h
+++ b/drivers/staging/iio/iio_simple_dummy.h
@@ -102,6 +102,7 @@ iio_simple_dummy_events_unregister(struct iio_dev *indio_dev)
  * @DUMMY_INDEX_DIFFVOLTAGE_1M2:   first differential channel
  * @DUMMY_INDEX_DIFFVOLTAGE_3M4:   second differential channel
  * @DUMMY_INDEX_ACCELX:            acceleration channel
+ * @DUMMY_INDEX_TIMESTAMP:         timestamp channel
  *
  * Enum provides convenient numbering for the scan index.
  */
@@ -110,6 +111,7 @@ enum iio_simple_dummy_scan_elements {
 	DUMMY_INDEX_DIFFVOLTAGE_1M2,
 	DUMMY_INDEX_DIFFVOLTAGE_3M4,
 	DUMMY_INDEX_ACCELX,
+	DUMMY_INDEX_TIMESTAMP,
 };
 
 #ifdef CONFIG_IIO_SIMPLE_DUMMY_BUFFER
diff --git a/drivers/staging/iio/iio_simple_dummy_buffer.c b/drivers/staging/iio/iio_simple_dummy_buffer.c
index cf44a6f..eea3e76 100644
--- a/drivers/staging/iio/iio_simple_dummy_buffer.c
+++ b/drivers/staging/iio/iio_simple_dummy_buffer.c
@@ -31,6 +31,7 @@ static const s16 fakedata[] = {
 	[DUMMY_INDEX_DIFFVOLTAGE_1M2] = -33,
 	[DUMMY_INDEX_DIFFVOLTAGE_3M4] = -2,
 	[DUMMY_INDEX_ACCELX] = 344,
+	[DUMMY_INDEX_TIMESTAMP] = 50,
 };
 
 /**
-- 
2.1.4