Add shared accelerometer channel enable attribute

0001-iio-dummy-add-shared-accel-enable.patch

From 094ed79b63ecb8a11c9fa69041395f1459a336fa Mon Sep 17 00:00:00 2001
From: Lucas Magasweran <lucas.magasweran@daqri.com>
Date: Thu, 4 Aug 2016 16:24:43 -0700
Subject: [PATCH] iio: dummy: add shared accel enable

Signed-off-by: Lucas Magasweran <lucas.magasweran@daqri.com>
---
 drivers/iio/dummy/iio_simple_dummy.c        | 37 +++++++++++++++++++++++++++--
 drivers/iio/dummy/iio_simple_dummy.h        |  6 ++++-
 drivers/iio/dummy/iio_simple_dummy_buffer.c |  2 +-
 3 files changed, 41 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/dummy/iio_simple_dummy.c b/drivers/iio/dummy/iio_simple_dummy.c
index 43fe4ba..ddeeb3c 100644
--- a/drivers/iio/dummy/iio_simple_dummy.c
+++ b/drivers/iio/dummy/iio_simple_dummy.c
@@ -204,7 +204,7 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
 	},
 	/*
 	 * 'modified' (i.e. axis specified) acceleration channel
-	 * in_accel_z_raw
+	 * in_accel_x_raw
 	 */
 	{
 		.type = IIO_ACCEL,
@@ -220,6 +220,7 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
 		 */
 		BIT(IIO_CHAN_INFO_CALIBSCALE) |
 		BIT(IIO_CHAN_INFO_CALIBBIAS),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_ENABLE),
 		.info_mask_shared_by_dir = BIT(IIO_CHAN_INFO_SAMP_FREQ),
 		.scan_index = DUMMY_INDEX_ACCELX,
 		.scan_type = { /* Description of storage in buffer */
@@ -230,10 +231,38 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
 		},
 	},
 	/*
+	 * 'modified' (i.e. axis specified) acceleration channel
+	 * in_accel_y_raw
+	 */
+	{
+		.type = IIO_ACCEL,
+		.modified = 1,
+		/* Channel 2 is use for modifiers */
+		.channel2 = IIO_MOD_Y,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+		/*
+		 * Internal bias and gain correction values. Applied
+		 * by the hardware or driver prior to userspace
+		 * seeing the readings. Typically part of hardware
+		 * calibration.
+		 */
+		BIT(IIO_CHAN_INFO_CALIBSCALE) |
+		BIT(IIO_CHAN_INFO_CALIBBIAS),
+		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_ENABLE),
+		.info_mask_shared_by_dir = BIT(IIO_CHAN_INFO_SAMP_FREQ),
+		.scan_index = DUMMY_INDEX_ACCELY,
+		.scan_type = { /* Description of storage in buffer */
+			.sign = 's', /* signed */
+			.realbits = 16, /* 16 bits */
+			.storagebits = 16, /* 16 bits used for storage */
+			.shift = 0, /* zero shift */
+		},
+	},
+	/*
 	 * Convenience macro for timestamps. 4 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,
@@ -395,6 +424,9 @@ static int iio_dummy_read_raw(struct iio_dev *indio_dev,
 			*val = st->steps_enabled;
 			ret = IIO_VAL_INT;
 			break;
+		case IIO_ACCEL:
+			*val = 1;
+			ret = IIO_VAL_INT;
 		default:
 			break;
 		}
@@ -638,6 +670,7 @@ static int iio_dummy_probe(int index)
 	if (ret < 0)
 		goto error_free_device;
 
+
 	ret = iio_simple_dummy_configure_buffer(indio_dev);
 	if (ret < 0)
 		goto error_unregister_events;
diff --git a/drivers/iio/dummy/iio_simple_dummy.h b/drivers/iio/dummy/iio_simple_dummy.h
index b9069a1..24ec928 100644
--- a/drivers/iio/dummy/iio_simple_dummy.h
+++ b/drivers/iio/dummy/iio_simple_dummy.h
@@ -101,7 +101,9 @@ iio_simple_dummy_events_unregister(struct iio_dev *indio_dev)
  * @DUMMY_INDEX_VOLTAGE_0:         the single ended voltage channel
  * @DUMMY_INDEX_DIFFVOLTAGE_1M2:   first differential channel
  * @DUMMY_INDEX_DIFFVOLTAGE_3M4:   second differential channel
- * @DUMMY_INDEX_ACCELX:            acceleration channel
+ * @DUMMY_INDEX_ACCELX:            acceleration x-axis channel
+ * @DUMMY_INDEX_ACCELY:            acceleration y-axis channel
+ * @DUMMY_INDEX_TIMESTAMP:         timestamp (must be last)
  *
  * Enum provides convenient numbering for the scan index.
  */
@@ -110,6 +112,8 @@ enum iio_simple_dummy_scan_elements {
 	DUMMY_INDEX_DIFFVOLTAGE_1M2,
 	DUMMY_INDEX_DIFFVOLTAGE_3M4,
 	DUMMY_INDEX_ACCELX,
+	DUMMY_INDEX_ACCELY,
+	DUMMY_INDEX_TIMESTAMP,
 };
 
 #ifdef CONFIG_IIO_SIMPLE_DUMMY_BUFFER
diff --git a/drivers/iio/dummy/iio_simple_dummy_buffer.c b/drivers/iio/dummy/iio_simple_dummy_buffer.c
index cf44a6f..d2bff72 100644
--- a/drivers/iio/dummy/iio_simple_dummy_buffer.c
+++ b/drivers/iio/dummy/iio_simple_dummy_buffer.c
@@ -10,7 +10,6 @@
  *
  * To test without hardware use the sysfs trigger.
  */
-
 #include <linux/kernel.h>
 #include <linux/export.h>
 #include <linux/slab.h>
@@ -31,6 +30,7 @@ static const s16 fakedata[] = {
 	[DUMMY_INDEX_DIFFVOLTAGE_1M2] = -33,
 	[DUMMY_INDEX_DIFFVOLTAGE_3M4] = -2,
 	[DUMMY_INDEX_ACCELX] = 344,
+	[DUMMY_INDEX_ACCELY] = 806,
 };
 
 /**
-- 
2.5.0