From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933975AbdDFQOG (ORCPT ); Thu, 6 Apr 2017 12:14:06 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:57381 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933815AbdDFQNF (ORCPT ); Thu, 6 Apr 2017 12:13:05 -0400 From: Fabrice Gasnier To: , , , , , CC: , , , , , , , , , Subject: [PATCH v2 3/5] iio: trigger: add set_trigger callback to notify device Date: Thu, 6 Apr 2017 18:11:54 +0200 Message-ID: <1491495116-7209-4-git-send-email-fabrice.gasnier@st.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1491495116-7209-1-git-send-email-fabrice.gasnier@st.com> References: <1491495116-7209-1-git-send-email-fabrice.gasnier@st.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.75.127.47] X-ClientProxiedBy: SFHDAG5NODE1.st.com (10.75.127.13) To SFHDAG5NODE3.st.com (10.75.127.15) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-04-06_14:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add 'set_trigger' callback to iio info structure. This allows device to be notified when a trigger (or no trigger) has been assigned. This maybe useful for instance in non buffered mode (e.g. event triggered). This is called, after trigger and device side validate callbacks have been called. Signed-off-by: Fabrice Gasnier --- Changes in v2: - Added set_trigger callback used in remaining patches --- drivers/iio/industrialio-trigger.c | 6 ++++++ include/linux/iio/iio.h | 2 ++ 2 files changed, 8 insertions(+) diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c index 978e1592..010bdf2 100644 --- a/drivers/iio/industrialio-trigger.c +++ b/drivers/iio/industrialio-trigger.c @@ -434,6 +434,12 @@ static ssize_t iio_trigger_write_current(struct device *dev, goto out_trigger_put; } + if (indio_dev->info->set_trigger) { + ret = indio_dev->info->set_trigger(indio_dev, trig); + if (ret) + goto out_trigger_put; + } + indio_dev->trig = trig; if (oldtrig) { diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 3f5ea2e..9f51065 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -399,6 +399,7 @@ static inline bool iio_channel_has_available(const struct iio_chan_spec *chan, * @write_event_value: write a configuration value for the event. * @validate_trigger: function to validate the trigger when the * current trigger gets changed. + * @set_trigger: function to notify current trigger gets changed. * @update_scan_mode: function to configure device and scan buffer when * channels have changed * @debugfs_reg_access: function to read or write register value of device @@ -478,6 +479,7 @@ struct iio_info { int (*validate_trigger)(struct iio_dev *indio_dev, struct iio_trigger *trig); + int (*set_trigger)(struct iio_dev *indio_dev, struct iio_trigger *trig); int (*update_scan_mode)(struct iio_dev *indio_dev, const unsigned long *scan_mask); int (*debugfs_reg_access)(struct iio_dev *indio_dev, -- 1.9.1