staging:iio:adc:AD7780: Convert to new channel registration method

Convert to new channel registration method

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c
index f828e832a95f6b8e223de04db15b3cee9b9e22ac..14b16b5d4b1abc84df2f20102206144d76ea800c 100644 (file)
--- a/drivers/staging/iio/adc/ad7780.c
+++ b/drivers/staging/iio/adc/ad7780.c
@@ -36,9 +36,7 @@
 #define AD7780_PAT0    (1 << 0)
 
 struct ad7780_chip_info {
-       u8                              bits;
-       u8                              storagebits;
-       u8                              res_shift;
+       struct iio_chan_spec            channel;
 };
 
 struct ad7780_state {
@@ -88,70 +86,59 @@ out:
        return ret;
 }
 
-static ssize_t ad7780_scan(struct device *dev,
-                           struct device_attribute *attr,
-                           char *buf)
+static int ad7780_read_raw(struct iio_dev *indio_dev,
+                          struct iio_chan_spec const *chan,
+                          int *val,
+                          int *val2,
+                          long m)
 {
-       struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct ad7780_state *st = dev_info->dev_data;
-       int ret, val, smpl;
-
-       mutex_lock(&dev_info->mlock);
-       ret = ad7780_read(st, &smpl);
-       mutex_unlock(&dev_info->mlock);
-
-       if (ret < 0)
-               return ret;
-
-       if ((smpl & AD7780_ERR) ||
-               !((smpl & AD7780_PAT0) && !(smpl & AD7780_PAT1)))
-               return -EIO;
-
-       val = (smpl >> st->chip_info->res_shift) &
-               ((1 << (st->chip_info->bits)) - 1);
-       val -= (1 << (st->chip_info->bits - 1));
-
-       if (!(smpl & AD7780_GAIN))
-               val *= 128;
-
-       return sprintf(buf, "%d\n", val);
-}
-static IIO_DEV_ATTR_IN_RAW(0, ad7780_scan, 0);
-
-static ssize_t ad7780_show_scale(struct device *dev,
-                               struct device_attribute *attr,
-                               char *buf)
-{
-       struct iio_dev *dev_info = dev_get_drvdata(dev);
-       struct ad7780_state *st = iio_dev_get_devdata(dev_info);
-       /* Corresponds to Vref / 2^(bits-1) */
-       unsigned int scale = (st->int_vref_mv * 100000) >>
-               (st->chip_info->bits - 1);
-
-       return sprintf(buf, "%d.%05d\n", scale / 100000, scale % 100000);
+       int ret, smpl;
+       struct ad7780_state *st = indio_dev->dev_data;
+       unsigned int scale_uv;
+
+       switch (m) {
+       case 0:
+               mutex_lock(&indio_dev->mlock);
+               ret = ad7780_read(st, &smpl);
+               mutex_unlock(&indio_dev->mlock);
+
+               if (ret < 0)
+                       return ret;
+
+               if ((smpl & AD7780_ERR) ||
+                       !((smpl & AD7780_PAT0) && !(smpl & AD7780_PAT1)))
+                       return -EIO;
+
+               *val = (smpl >> st->chip_info->channel.scan_type.shift) &
+                       ((1 << (st->chip_info->channel.scan_type.realbits))
+                       - 1);
+               *val -= (1 << (st->chip_info->channel.scan_type.realbits
+                       - 1));
+
+               if (!(smpl & AD7780_GAIN))
+                       *val *= 128;
+
+               return IIO_VAL_INT;
+       case (1 << IIO_CHAN_INFO_SCALE_SHARED):
+               scale_uv = (st->int_vref_mv * 100000)
+                       >> (st->chip_info->channel.scan_type.realbits - 1);
+               *val =  scale_uv / 100000;
+               *val2 = (scale_uv % 100000) * 10;
+               return IIO_VAL_INT_PLUS_MICRO;
+       }
+       return -EINVAL;
 }
-static IIO_DEVICE_ATTR(in_scale, S_IRUGO, ad7780_show_scale, NULL, 0);
-
-static struct attribute *ad7780_attributes[] = {
-       &iio_dev_attr_in0_raw.dev_attr.attr,
-       &iio_dev_attr_in_scale.dev_attr.attr,
-       NULL,
-};
-
-static const struct attribute_group ad7780_attribute_group = {
-       .attrs = ad7780_attributes,
-};
 
 static const struct ad7780_chip_info ad7780_chip_info_tbl[] = {
        [ID_AD7780] = {
-               .bits = 24,
-               .storagebits = 32,
-               .res_shift = 8,
+               .channel = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+                                   (1 << IIO_CHAN_INFO_SCALE_SHARED),
+                                   0, 0, IIO_ST('s', 24, 32, 8), 0),
        },
        [ID_AD7781] = {
-               .bits = 20,
-               .storagebits = 32,
-               .res_shift = 12,
+               .channel = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
+                                   (1 << IIO_CHAN_INFO_SCALE_SHARED),
+                                   0, 0, IIO_ST('s', 20, 32, 12), 0),
        },
 };
 
@@ -218,17 +205,19 @@ static int __devinit ad7780_probe(struct spi_device *spi)
        /* Establish that the iio_dev is a child of the spi device */
        st->indio_dev->dev.parent = &spi->dev;
        st->indio_dev->name = spi_get_device_id(spi)->name;
-       st->indio_dev->attrs = &ad7780_attribute_group;
        st->indio_dev->dev_data = (void *)(st);
        st->indio_dev->driver_module = THIS_MODULE;
        st->indio_dev->modes = INDIO_DIRECT_MODE;
+       st->indio_dev->channels = &st->chip_info->channel;
+       st->indio_dev->num_channels = 1;
+       st->indio_dev->read_raw = &ad7780_read_raw;
 
        init_waitqueue_head(&st->wq_data_avail);
 
        /* Setup default message */
 
        st->xfer.rx_buf = &st->data;
-       st->xfer.len = st->chip_info->storagebits / 8;
+       st->xfer.len = st->chip_info->channel.scan_type.storagebits / 8;
 
        spi_message_init(&st->msg);
        spi_message_add_tail(&st->xfer, &st->msg);