iio: multiplexer: iio-mux: Support settle-time-us property
If the devicetree specifies that the hardware requires a settle time,
pass this time on to the mux APIs.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
Tested-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Peter Rosin <peda@axentia.se>
Link: https://lore.kernel.org/r/20211007134641.13417-4-vincent.whitchurch@axis.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
diff --git a/drivers/iio/multiplexer/iio-mux.c b/drivers/iio/multiplexer/iio-mux.c
index d54ae5c..f422d44 100644
--- a/drivers/iio/multiplexer/iio-mux.c
+++ b/drivers/iio/multiplexer/iio-mux.c
@@ -33,6 +33,7 @@ struct mux {
struct iio_chan_spec *chan;
struct iio_chan_spec_ext_info *ext_info;
struct mux_child *child;
+ u32 delay_us;
};
static int iio_mux_select(struct mux *mux, int idx)
@@ -42,7 +43,8 @@ static int iio_mux_select(struct mux *mux, int idx)
int ret;
int i;
- ret = mux_control_select(mux->control, chan->channel);
+ ret = mux_control_select_delay(mux->control, chan->channel,
+ mux->delay_us);
if (ret < 0) {
mux->cached_state = -1;
return ret;
@@ -392,6 +394,9 @@ static int mux_probe(struct platform_device *pdev)
mux->parent = parent;
mux->cached_state = -1;
+ mux->delay_us = 0;
+ of_property_read_u32(np, "settle-time-us", &mux->delay_us);
+
indio_dev->name = dev_name(dev);
indio_dev->info = &mux_info;
indio_dev->modes = INDIO_DIRECT_MODE;
