staging:iio:ade7758: Use iio_validate_scan_mask_onehot

Only one of the channels of the ade7758 may be sampled at a time. Use the new
validate_scan_mask callback and the iio_validate_scan_mask_onehot function to
implement this restriction. Previously this was implemented using
available_scan_masks, but this requires a individual scan mask for each channel.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/staging/iio/meter/ade7758.h b/drivers/staging/iio/meter/ade7758.h
index bdd1b05..ec202b4 100644 (file)
--- a/drivers/staging/iio/meter/ade7758.h
+++ b/drivers/staging/iio/meter/ade7758.h
@@ -122,7 +122,6 @@ struct ade7758_state {
        u8                      *tx;
        u8                      *rx;
        struct mutex            buf_lock;
-       unsigned long           available_scan_masks[AD7758_NUM_WAVESRC];
        struct iio_chan_spec    *ade7758_ring_channels;
        struct spi_transfer     ring_xfer[4];
        struct spi_message      ring_msg;

diff --git a/drivers/staging/iio/meter/ade7758_core.c b/drivers/staging/iio/meter/ade7758_core.c
index 96d6114..7014a00 100644 (file)
--- a/drivers/staging/iio/meter/ade7758_core.c
+++ b/drivers/staging/iio/meter/ade7758_core.c
@@ -883,7 +883,7 @@ static const struct iio_info ade7758_info = {
 
 static int __devinit ade7758_probe(struct spi_device *spi)
 {
-       int i, ret;
+       int ret;
        struct ade7758_state *st;
        struct iio_dev *indio_dev = iio_device_alloc(sizeof(*st));
 
@@ -916,11 +916,6 @@ static int __devinit ade7758_probe(struct spi_device *spi)
        indio_dev->info = &ade7758_info;
        indio_dev->modes = INDIO_DIRECT_MODE;
 
-       for (i = 0; i < AD7758_NUM_WAVESRC; i++)
-               set_bit(i, &st->available_scan_masks[i]);
-
-       indio_dev->available_scan_masks = st->available_scan_masks;
-
        ret = ade7758_configure_ring(indio_dev);
        if (ret)
                goto error_free_tx;

diff --git a/drivers/staging/iio/meter/ade7758_ring.c b/drivers/staging/iio/meter/ade7758_ring.c
index 92159f2..1ce10b2 100644 (file)
--- a/drivers/staging/iio/meter/ade7758_ring.c
+++ b/drivers/staging/iio/meter/ade7758_ring.c
@@ -114,6 +114,7 @@ static const struct iio_buffer_setup_ops ade7758_ring_setup_ops = {
        .preenable = &ade7758_ring_preenable,
        .postenable = &iio_triggered_buffer_postenable,
        .predisable = &iio_triggered_buffer_predisable,
+       .validate_scan_mask = &iio_validate_scan_mask_onehot,
 };
 
 void ade7758_unconfigure_ring(struct iio_dev *indio_dev)