From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ppsw-41.csi.cam.ac.uk ([131.111.8.141]:59470 "EHLO ppsw-41.csi.cam.ac.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754796Ab1K0NKH (ORCPT ); Sun, 27 Nov 2011 08:10:07 -0500 From: Jonathan Cameron To: linux-iio@vger.kernel.org Cc: lars@metafoo.de, Michael.Hennerich@analog.com, Jonathan Cameron Subject: [PATCH 2/7] staging:iio:buffer add a cache of the timestamp scan index. Date: Sun, 27 Nov 2011 13:10:07 +0000 Message-Id: <1322399412-21622-3-git-send-email-jic23@kernel.org> In-Reply-To: <1322399412-21622-1-git-send-email-jic23@kernel.org> References: <1322399412-21622-1-git-send-email-jic23@kernel.org> Sender: linux-iio-owner@vger.kernel.org List-Id: linux-iio@vger.kernel.org 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 f757bb7..cae7922 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 -- 1.7.7.3