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authorMatt Ranostay <mranostay@gmail.com>2016-08-19 20:17:02 -0700
committerJonathan Cameron <jic23@kernel.org>2016-08-21 11:47:19 +0100
commitadca058b56108eb3458165c6a9e5d78558be8b52 (patch)
tree979cca3ed01fb1ea688b170d34e0d7bfdc5d30a4 /drivers/iio/buffer
parenta4fa6509dda47e51c3582409e8630b24702970c5 (diff)
iio: buffer-callback: allow getting underlying iio_dev
Add iio_channel_cb_get_iio_dev function to allow getting the underlying iio_dev. This is useful for setting the trigger of the consumer ADC device. Signed-off-by: Matt Ranostay <mranostay@gmail.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/buffer')
-rw-r--r--drivers/iio/buffer/industrialio-buffer-cb.c24
1 files changed, 14 insertions, 10 deletions
diff --git a/drivers/iio/buffer/industrialio-buffer-cb.c b/drivers/iio/buffer/industrialio-buffer-cb.c
index 323079c3ccce..b8f550e47d3d 100644
--- a/drivers/iio/buffer/industrialio-buffer-cb.c
+++ b/drivers/iio/buffer/industrialio-buffer-cb.c
@@ -18,6 +18,7 @@ struct iio_cb_buffer {
int (*cb)(const void *data, void *private);
void *private;
struct iio_channel *channels;
+ struct iio_dev *indio_dev;
};
static struct iio_cb_buffer *buffer_to_cb_buffer(struct iio_buffer *buffer)
@@ -52,7 +53,6 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev,
{
int ret;
struct iio_cb_buffer *cb_buff;
- struct iio_dev *indio_dev;
struct iio_channel *chan;
cb_buff = kzalloc(sizeof(*cb_buff), GFP_KERNEL);
@@ -72,17 +72,17 @@ struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev,
goto error_free_cb_buff;
}
- indio_dev = cb_buff->channels[0].indio_dev;
+ cb_buff->indio_dev = cb_buff->channels[0].indio_dev;
cb_buff->buffer.scan_mask
- = kcalloc(BITS_TO_LONGS(indio_dev->masklength), sizeof(long),
- GFP_KERNEL);
+ = kcalloc(BITS_TO_LONGS(cb_buff->indio_dev->masklength),
+ sizeof(long), GFP_KERNEL);
if (cb_buff->buffer.scan_mask == NULL) {
ret = -ENOMEM;
goto error_release_channels;
}
chan = &cb_buff->channels[0];
while (chan->indio_dev) {
- if (chan->indio_dev != indio_dev) {
+ if (chan->indio_dev != cb_buff->indio_dev) {
ret = -EINVAL;
goto error_free_scan_mask;
}
@@ -105,17 +105,14 @@ EXPORT_SYMBOL_GPL(iio_channel_get_all_cb);
int iio_channel_start_all_cb(struct iio_cb_buffer *cb_buff)
{
- return iio_update_buffers(cb_buff->channels[0].indio_dev,
- &cb_buff->buffer,
+ return iio_update_buffers(cb_buff->indio_dev, &cb_buff->buffer,
NULL);
}
EXPORT_SYMBOL_GPL(iio_channel_start_all_cb);
void iio_channel_stop_all_cb(struct iio_cb_buffer *cb_buff)
{
- iio_update_buffers(cb_buff->channels[0].indio_dev,
- NULL,
- &cb_buff->buffer);
+ iio_update_buffers(cb_buff->indio_dev, NULL, &cb_buff->buffer);
}
EXPORT_SYMBOL_GPL(iio_channel_stop_all_cb);
@@ -133,6 +130,13 @@ struct iio_channel
}
EXPORT_SYMBOL_GPL(iio_channel_cb_get_channels);
+struct iio_dev
+*iio_channel_cb_get_iio_dev(const struct iio_cb_buffer *cb_buffer)
+{
+ return cb_buffer->indio_dev;
+}
+EXPORT_SYMBOL_GPL(iio_channel_cb_get_iio_dev);
+
MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
MODULE_DESCRIPTION("Industrial I/O callback buffer");
MODULE_LICENSE("GPL");

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