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iio:core: timestamping clock selection support

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Adds a new per-device sysfs attribute "current_timestamp_clock" to allow
userspace to select a particular POSIX clock for buffered samples and
events timestamping.

Following clocks, as listed in clock_gettime(2), are supported:
CLOCK_REALTIME, CLOCK_MONOTONIC, CLOCK_MONOTONIC_RAW,
CLOCK_REALTIME_COARSE, CLOCK_MONOTONIC_COARSE, CLOCK_BOOTTIME and
CLOCK_TAI.

Signed-off-by: Gregor Boirie <gregor.boirie@parrot.com>
Acked-by: Sanchayan Maity <maitysanchayan@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Gregor Boirie
2016-03-09 19:05:49 +01:00
committed by Jonathan Cameron
parent eaaa7ec71b
commit bc2b7dab62
69 changed files with 327 additions and 114 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/iio/adc/ad7291.c
View File

@@ -115,7 +115,7 @@ static irqreturn_t ad7291_event_handler(int irq, void *private)
u16 t_status, v_status;
u16 command;
int i;
s64 timestamp = iio_get_time_ns();
s64 timestamp = iio_get_time_ns(indio_dev);
if (ad7291_i2c_read(chip, AD7291_T_ALERT_STATUS, &t_status))
return IRQ_HANDLED;

2
drivers/iio/adc/ad7298.c
View File

@@ -163,7 +163,7 @@ static irqreturn_t ad7298_trigger_handler(int irq, void *p)
goto done;
iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf,
iio_get_time_ns());
iio_get_time_ns(indio_dev));
done:
iio_trigger_notify_done(indio_dev->trig);

2
drivers/iio/adc/ad7476.c
View File

@@ -70,7 +70,7 @@ static irqreturn_t ad7476_trigger_handler(int irq, void *p)
goto done;
iio_push_to_buffers_with_timestamp(indio_dev, st->data,
iio_get_time_ns());
iio_get_time_ns(indio_dev));
done:
iio_trigger_notify_done(indio_dev->trig);

2
drivers/iio/adc/ad7887.c
View File

@@ -122,7 +122,7 @@ static irqreturn_t ad7887_trigger_handler(int irq, void *p)
goto done;
iio_push_to_buffers_with_timestamp(indio_dev, st->data,
iio_get_time_ns());
iio_get_time_ns(indio_dev));
done:
iio_trigger_notify_done(indio_dev->trig);

2
drivers/iio/adc/ad7923.c
View File

@@ -181,7 +181,7 @@ static irqreturn_t ad7923_trigger_handler(int irq, void *p)
goto done;
iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf,
iio_get_time_ns());
iio_get_time_ns(indio_dev));
done:
iio_trigger_notify_done(indio_dev->trig);

4
drivers/iio/adc/ad799x.c
View File

@@ -212,7 +212,7 @@ static irqreturn_t ad799x_trigger_handler(int irq, void *p)
goto out;
iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf,
iio_get_time_ns());
iio_get_time_ns(indio_dev));
out:
iio_trigger_notify_done(indio_dev->trig);
@@ -502,7 +502,7 @@ static irqreturn_t ad799x_event_handler(int irq, void *private)
(i >> 1),
IIO_EV_TYPE_THRESH,
IIO_EV_DIR_FALLING),
iio_get_time_ns());
iio_get_time_ns(indio_dev));
}
done:

2
drivers/iio/adc/cc10001_adc.c
View File

@@ -186,7 +186,7 @@ done:
if (!sample_invalid)
iio_push_to_buffers_with_timestamp(indio_dev, data,
iio_get_time_ns());
iio_get_time_ns(indio_dev));
iio_trigger_notify_done(indio_dev->trig);
return IRQ_HANDLED;

2
drivers/iio/adc/hi8435.c
View File

@@ -400,7 +400,7 @@ static void hi8435_iio_push_event(struct iio_dev *idev, unsigned int val)
iio_push_event(idev,
IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, i,
IIO_EV_TYPE_THRESH, dir),
iio_get_time_ns());
iio_get_time_ns(idev));
}
}

6
drivers/iio/adc/ina2xx-adc.c
View File

@@ -465,7 +465,7 @@ static int ina2xx_work_buffer(struct iio_dev *indio_dev)
s64 time_a, time_b;
unsigned int alert;
time_a = iio_get_time_ns();
time_a = iio_get_time_ns(indio_dev);
/*
* Because the timer thread and the chip conversion clock
@@ -504,7 +504,7 @@ static int ina2xx_work_buffer(struct iio_dev *indio_dev)
data[i++] = val;
}
time_b = iio_get_time_ns();
time_b = iio_get_time_ns(indio_dev);
iio_push_to_buffers_with_timestamp(indio_dev,
(unsigned int *)data, time_a);
@@ -554,7 +554,7 @@ static int ina2xx_buffer_enable(struct iio_dev *indio_dev)
dev_dbg(&indio_dev->dev, "Async readout mode: %d\n",
chip->allow_async_readout);
chip->prev_ns = iio_get_time_ns();
chip->prev_ns = iio_get_time_ns(indio_dev);
chip->task = kthread_run(ina2xx_capture_thread, (void *)indio_dev,
"%s:%d-%uus", indio_dev->name, indio_dev->id,

5
drivers/iio/adc/max1363.c
View File

@@ -788,7 +788,7 @@ static irqreturn_t max1363_event_handler(int irq, void *private)
{
struct iio_dev *indio_dev = private;
struct max1363_state *st = iio_priv(indio_dev);
s64 timestamp = iio_get_time_ns();
s64 timestamp = iio_get_time_ns(indio_dev);
unsigned long mask, loc;
u8 rx;
u8 tx[2] = { st->setupbyte,
@@ -1506,7 +1506,8 @@ static irqreturn_t max1363_trigger_handler(int irq, void *p)
if (b_sent < 0)
goto done_free;
iio_push_to_buffers_with_timestamp(indio_dev, rxbuf, iio_get_time_ns());
iio_push_to_buffers_with_timestamp(indio_dev, rxbuf,
iio_get_time_ns(indio_dev));
done_free:
kfree(rxbuf);

3
drivers/iio/adc/ti-adc081c.c
View File

@@ -139,7 +139,8 @@ static irqreturn_t adc081c_trigger_handler(int irq, void *p)
if (ret < 0)
goto out;
buf[0] = ret;
iio_push_to_buffers_with_timestamp(indio_dev, buf, iio_get_time_ns());
iio_push_to_buffers_with_timestamp(indio_dev, buf,
iio_get_time_ns(indio_dev));
out:
iio_trigger_notify_done(indio_dev->trig);
return IRQ_HANDLED;

3
drivers/iio/adc/ti-ads1015.c
View File

@@ -288,7 +288,8 @@ static irqreturn_t ads1015_trigger_handler(int irq, void *p)
buf[0] = res;
mutex_unlock(&data->lock);
iio_push_to_buffers_with_timestamp(indio_dev, buf, iio_get_time_ns());
iio_push_to_buffers_with_timestamp(indio_dev, buf,
iio_get_time_ns(indio_dev));
err:
iio_trigger_notify_done(indio_dev->trig);

3
drivers/iio/adc/vf610_adc.c
View File

@@ -594,7 +594,8 @@ static irqreturn_t vf610_adc_isr(int irq, void *dev_id)
if (iio_buffer_enabled(indio_dev)) {
info->buffer[0] = info->value;
iio_push_to_buffers_with_timestamp(indio_dev,
info->buffer, iio_get_time_ns());
info->buffer,
iio_get_time_ns(indio_dev));
iio_trigger_notify_done(indio_dev->trig);
} else
complete(&info->completion);

4
drivers/iio/adc/xilinx-xadc-events.c
View File

@@ -46,7 +46,7 @@ static void xadc_handle_event(struct iio_dev *indio_dev, unsigned int event)
iio_push_event(indio_dev,
IIO_UNMOD_EVENT_CODE(chan->type, chan->channel,
IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
iio_get_time_ns());
iio_get_time_ns(indio_dev));
} else {
/*
* For other channels we don't know whether it is a upper or
@@ -56,7 +56,7 @@ static void xadc_handle_event(struct iio_dev *indio_dev, unsigned int event)
iio_push_event(indio_dev,
IIO_UNMOD_EVENT_CODE(chan->type, chan->channel,
IIO_EV_TYPE_THRESH, IIO_EV_DIR_EITHER),
iio_get_time_ns());
iio_get_time_ns(indio_dev));
}
}