From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ns.pmeerw.net ([87.118.82.44]:43272 "EHLO pmeerw.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752954AbaFGPbu (ORCPT ); Sat, 7 Jun 2014 11:31:50 -0400 From: Peter Meerwald To: linux-iio@vger.kernel.org Cc: lars@metafoo.de, jic23@kernel.org, Peter Meerwald Subject: [PATCH v2 13/13] iio:adc:ad799x: Allow to write event config Date: Sat, 7 Jun 2014 17:31:37 +0200 Message-Id: <1402155097-435-14-git-send-email-pmeerw@pmeerw.net> In-Reply-To: <1402155097-435-1-git-send-email-pmeerw@pmeerw.net> References: <1402155097-435-1-git-send-email-pmeerw@pmeerw.net> Sender: linux-iio-owner@vger.kernel.org List-Id: linux-iio@vger.kernel.org allow to enable events previously, events were always reported as enabled, but actually only implicitly enabled when updating the buffer scan mode Signed-off-by: Peter Meerwald --- drivers/iio/adc/ad799x.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c index 8b9c939..4048700 100644 --- a/drivers/iio/adc/ad799x.c +++ b/drivers/iio/adc/ad799x.c @@ -375,6 +375,39 @@ static int ad799x_read_event_config(struct iio_dev *indio_dev, return 0; } +static int ad799x_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + int state) +{ + struct ad799x_state *st = iio_priv(indio_dev); + int ret; + + mutex_lock(&indio_dev->mlock); + if (iio_buffer_enabled(indio_dev)) { + ret = -EBUSY; + goto done; + } + + if (state) + st->config |= BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT; + else + st->config &= ~(BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT); + + if (st->config >> AD799X_CHANNEL_SHIFT) + st->config |= AD7998_ALERT_EN; + else + st->config &= ~AD7998_ALERT_EN; + + ret = ad799x_write_config(st, st->config); + +done: + mutex_unlock(&indio_dev->mlock); + + return ret; +} + static unsigned int ad799x_threshold_reg(const struct iio_chan_spec *chan, enum iio_event_direction dir, enum iio_event_info info) @@ -503,6 +536,7 @@ static const struct iio_info ad7993_4_7_8_irq_info = { .read_raw = &ad799x_read_raw, .event_attrs = &ad799x_event_attrs_group, .read_event_config = &ad799x_read_event_config, + .write_event_config = &ad799x_write_event_config, .read_event_value = &ad799x_read_event_value, .write_event_value = &ad799x_write_event_value, .driver_module = THIS_MODULE, -- 1.9.1