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[87.92.218.151]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-393f60db4dasm17810681fa.20.2026.05.10.01.26.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 10 May 2026 01:26:10 -0700 (PDT) From: Md Shofiqul Islam To: jic23@kernel.org Cc: lars@metafoo.de, Michael.Hennerich@analog.com, dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Md Shofiqul Islam Subject: [PATCH 5/5] iio: accel: adxl345: Add timestamp to FIFO data Date: Sun, 10 May 2026 11:25:56 +0300 Message-ID: <20260510082556.3867-6-shofiqtest@gmail.com> X-Mailer: git-send-email 2.54.0.windows.1 In-Reply-To: <20260510082556.3867-1-shofiqtest@gmail.com> References: <20260510082556.3867-1-shofiqtest@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The driver pushes FIFO samples using iio_push_to_buffers() which does not attach a hardware timestamp to the data. Add a scan buffer struct with an aligned_s64 timestamp field to struct adxl345_state, capture a timestamp with iio_get_time_ns() at the start of adxl345_fifo_push(), and switch the push loop to iio_push_to_buffers_with_timestamp(). The ADXL345 always scans all three axes together so the scan buffer layout is fixed. Signed-off-by: Md Shofiqul Islam --- drivers/iio/accel/adxl345_core.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c index 6c9080d88c..2b121bed89 100644 --- a/drivers/iio/accel/adxl345_core.c +++ b/drivers/iio/accel/adxl345_core.c @@ -204,6 +204,10 @@ struct adxl345_state { u32 tap_window_us; __le16 fifo_buf[ADXL345_DIRS * ADXL345_FIFO_SIZE + 1] __aligned(IIO_DMA_MINALIGN); + struct { + __le16 channels[ADXL345_DIRS]; + aligned_s64 ts; + } scan; }; static const struct iio_event_spec adxl345_events[] = { @@ -1657,6 +1661,7 @@ static int adxl345_fifo_push(struct iio_dev *indio_dev, int samples) { struct adxl345_state *st = iio_priv(indio_dev); + s64 ts = iio_get_time_ns(indio_dev); int i, ret; if (samples <= 0) @@ -1666,8 +1671,11 @@ static int adxl345_fifo_push(struct iio_dev *indio_dev, if (ret) return ret; - for (i = 0; i < ADXL345_DIRS * samples; i += ADXL345_DIRS) - iio_push_to_buffers(indio_dev, &st->fifo_buf[i]); + for (i = 0; i < ADXL345_DIRS * samples; i += ADXL345_DIRS) { + memcpy(st->scan.channels, &st->fifo_buf[i], + sizeof(st->scan.channels)); + iio_push_to_buffers_with_timestamp(indio_dev, &st->scan, ts); + } return 0; } -- 2.54.0.windows.1