@@ -288,6 +288,9 @@ static int max1027_wait_eoc(struct iio_dev *indio_dev)
if (!ret)
return ret;
} else {
+ if (indio_dev->active_scan_mask)
+ conversion_time *= hweight32(*indio_dev->active_scan_mask);
+
usleep_range(conversion_time, conversion_time * 2);
}
@@ -585,16 +588,18 @@ static int max1027_probe(struct spi_device *spi)
if (!st->buffer)
return -ENOMEM;
+ /* Enable triggered buffers */
+ ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
+ &iio_pollfunc_store_time,
+ &max1027_ext_trigger_handler,
+ NULL);
+ if (ret < 0) {
+ dev_err(&indio_dev->dev, "Failed to setup buffer\n");
+ return ret;
+ }
+
+ /* If there is an EOC interrupt, register the hardware trigger (cnvst) */
if (spi->irq) {
- ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev,
- &iio_pollfunc_store_time,
- &max1027_ext_trigger_handler,
- NULL);
- if (ret < 0) {
- dev_err(&indio_dev->dev, "Failed to setup buffer\n");
- return ret;
- }
-
st->trig = devm_iio_trigger_alloc(&spi->dev, "%s-trigger",
indio_dev->name);
if (!st->trig) {
External triggers do not necessarily need the EOC interrupt to be populated to work properly. The end of conversion status may either come from an interrupt or from a sufficient enough extra delay. IRQs are not mandatory so move the triggered buffer setup out of the IRQ condition and add the logic to wait enough time for all the requested conversions to be in the device's FIFO. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> --- drivers/iio/adc/max1027.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-)