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Wed, 18 Jun 2025 13:39:31 -0400 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1748.10; Wed, 18 Jun 2025 13:39:31 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.2.1748.10 via Frontend Transport; Wed, 18 Jun 2025 13:39:31 -0400 Received: from work.ad.analog.com (HYB-hERzalRezfV.ad.analog.com [10.65.205.9]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 55IHdDLx007658; Wed, 18 Jun 2025 13:39:15 -0400 From: Marcelo Schmitt To: , , , CC: , , , , , , , , , , , , , Subject: [PATCH v6 12/12] iio: adc: ad4170: Add timestamp channel Date: Wed, 18 Jun 2025 14:39:12 -0300 Message-ID: <63ebf4408a118a749481ecb3f5ce7ad67cedfa7b.1750258776.git.marcelo.schmitt@analog.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-ORIG-GUID: wbgdZ0c0wYrprg2Qn6H9Y4KcxBfgpDQV X-Authority-Analysis: v=2.4 cv=SKhCVPvH c=1 sm=1 tr=0 ts=6852f9d4 cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=6IFa9wvqVegA:10 a=gAnH3GRIAAAA:8 a=ooJTjvKFDTQpXrV7GjsA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNjE4MDE1MCBTYWx0ZWRfX8r2pr08BrSmd ftGGA6y4QdW9K/9Ig3fcG4o8Hz+N9NnwK08dYyAZ5MJ8Xpr0RRz1SjAMooWB9JUp/y3SWizUpC9 A91KdbN1JwbNg6ZPZ9uQT9RlwNZ6jbwMp0BKzJAhU1oJXV7ensto+tnRIgkT9eB1h4B68DXpVqB v5UxoTeJ/k45sXZgHnS9cBlvuKAcwWqVNgIywAlUsxavwcY1WXBTtppXaRCI6NRgaM0cpqLc22g XmG6wJICxUxpcb2CwspgAY9BYUJY61O+8g69/TQH8NXgKCL5KPkLVg9VzTB0v48/R5N4YyKHQLm 6/poQI6ElkC23WnQstmm1gQi29CyOseusM0X0LLNyRLUV8S1fXgE9BT4W+v+XvVc8eilzMqqNKy e/wbKu6Rwhl65f/fPBjZ6Erc0v0n5ZJbN+0Cs3RKdZx6FlYahJKADd4rmdUmo/LKUYpfTI3b X-Proofpoint-GUID: wbgdZ0c0wYrprg2Qn6H9Y4KcxBfgpDQV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-06-18_05,2025-06-18_03,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 bulkscore=0 adultscore=0 lowpriorityscore=0 spamscore=0 suspectscore=0 mlxscore=0 malwarescore=0 mlxlogscore=999 clxscore=1015 phishscore=0 priorityscore=1501 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2506180150 Add timestamp channel allowing to record the moment at which ADC samples are captured in buffered read mode. Signed-off-by: Marcelo Schmitt --- No changes in v6. drivers/iio/adc/ad4170.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) diff --git a/drivers/iio/adc/ad4170.c b/drivers/iio/adc/ad4170.c index 2a2d4a05e9af..33b9a6b2255b 100644 --- a/drivers/iio/adc/ad4170.c +++ b/drivers/iio/adc/ad4170.c @@ -185,6 +185,7 @@ #define AD4170_NUM_ANALOG_PINS 9 #define AD4170_NUM_GPIO_PINS 4 #define AD4170_MAX_CHANNELS 16 +#define AD4170_MAX_IIO_CHANNELS (AD4170_MAX_CHANNELS + 1) #define AD4170_MAX_ANALOG_PINS 8 #define AD4170_MAX_SETUPS 8 #define AD4170_INVALID_SETUP 9 @@ -437,7 +438,7 @@ struct ad4170_state { int vrefs_uv[AD4170_MAX_SUP]; u32 mclk_hz; struct ad4170_setup_info setup_infos[AD4170_MAX_SETUPS]; - struct iio_chan_spec chans[AD4170_MAX_CHANNELS]; + struct iio_chan_spec chans[AD4170_MAX_IIO_CHANNELS]; struct ad4170_chan_info chan_infos[AD4170_MAX_CHANNELS]; struct spi_device *spi; struct regmap *regmap; @@ -454,6 +455,7 @@ struct ad4170_state { unsigned int clock_ctrl; int gpio_fn[AD4170_NUM_GPIO_PINS]; unsigned int cur_src_pins[AD4170_NUM_CURRENT_SRC]; + unsigned int num_adc_chans; /* * DMA (thus cache coherency maintenance) requires the transfer buffers * to live in their own cache lines. @@ -2389,7 +2391,16 @@ static int ad4170_parse_channels(struct iio_dev *indio_dev) return dev_err_probe(dev, ret, "Invalid input config\n"); st->chan_infos[chan_num].input_range_uv = ret; + chan_num++; } + st->num_adc_chans = chan_num; + + /* Add timestamp channel */ + struct iio_chan_spec ts_chan = IIO_CHAN_SOFT_TIMESTAMP(chan_num); + + st->chans[chan_num] = ts_chan; + num_channels = num_channels + 1; + indio_dev->num_channels = num_channels; indio_dev->channels = st->chans; @@ -2581,7 +2592,7 @@ static int ad4170_initial_config(struct iio_dev *indio_dev) return dev_err_probe(dev, ret, "Failed to set ADC mode to idle\n"); - for (i = 0; i < indio_dev->num_channels; i++) { + for (i = 0; i < st->num_adc_chans; i++) { struct ad4170_chan_info *chan_info; struct iio_chan_spec const *chan; struct ad4170_setup *setup; @@ -2706,7 +2717,7 @@ static int ad4170_buffer_predisable(struct iio_dev *indio_dev) * is done after buffer disable. Disable all channels so only requested * channels will be read. */ - for (i = 0; i < indio_dev->num_channels; i++) { + for (i = 0; i < st->num_adc_chans; i++) { ret = ad4170_set_channel_enable(st, i, false); if (ret) return ret; @@ -2758,7 +2769,9 @@ static irqreturn_t ad4170_trigger_handler(int irq, void *p) memcpy(&st->bounce_buffer[i++], st->rx_buf, ARRAY_SIZE(st->rx_buf)); } - iio_push_to_buffers(indio_dev, st->bounce_buffer); + iio_push_to_buffers_with_ts(indio_dev, st->bounce_buffer, + sizeof(st->bounce_buffer), + iio_get_time_ns(indio_dev)); err_out: iio_trigger_notify_done(indio_dev->trig); return IRQ_HANDLED;