From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Jonathan Cameron To: linux-iio@vger.kernel.org Cc: lars@metafoo.de, Jonathan Cameron Subject: [PATCH 2/7] staging:iio:buffer add a cache of the timestamp scan index. Date: Sun, 4 Dec 2011 20:56:57 +0000 Message-Id: <1323032222-21338-3-git-send-email-jic23@kernel.org> In-Reply-To: <1323032222-21338-1-git-send-email-jic23@kernel.org> References: <1323032222-21338-1-git-send-email-jic23@kernel.org> Sender: "J.I. Cameron" List-ID: From: Jonathan Cameron Basically avoids looking it up lots of times. Signed-off-by: Jonathan Cameron --- drivers/staging/iio/buffer.h | 1 + drivers/staging/iio/industrialio-buffer.c | 3 +++ 2 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/staging/iio/buffer.h b/drivers/staging/iio/buffer.h index 9de581e..4b8f619 100644 --- a/drivers/staging/iio/buffer.h +++ b/drivers/staging/iio/buffer.h @@ -106,6 +106,7 @@ struct iio_buffer { int scan_count; long *scan_mask; bool scan_timestamp; + unsigned scan_index_timestamp; const struct iio_buffer_access_funcs *access; const struct iio_buffer_setup_ops *setup_ops; struct list_head scan_el_dev_attr_list; diff --git a/drivers/staging/iio/industrialio-buffer.c b/drivers/staging/iio/industrialio-buffer.c index 8c55980..b2cf3e3 100644 --- a/drivers/staging/iio/industrialio-buffer.c +++ b/drivers/staging/iio/industrialio-buffer.c @@ -313,6 +313,9 @@ int iio_buffer_register(struct iio_dev *indio_dev, if (ret < 0) goto error_cleanup_dynamic; attrcount += ret; + if (channels[i].type == IIO_TIMESTAMP) + buffer->scan_index_timestamp = + channels[i].scan_index; } if (indio_dev->masklength && buffer->scan_mask == NULL) { buffer->scan_mask = kcalloc(BITS_TO_LONGS(indio_dev->masklength), -- 1.7.7.4