u8 rx[2] ____cacheline_aligned;
};
-static ssize_t ad2s120x_show_val(struct device *dev,
- struct device_attribute *attr, char *buf)
+static int ad2s1200_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
{
int ret = 0;
- ssize_t len = 0;
- u16 pos;
s16 vel;
- u8 status;
- struct ad2s120x_state *st = iio_priv(dev_get_drvdata(dev));
- struct iio_dev_attr *iattr = to_iio_dev_attr(attr);
+ struct ad2s120x_state *st = iio_priv(indio_dev);
mutex_lock(&st->lock);
-
gpio_set_value(st->sample, 0);
/* delay (6 * AD2S120X_TSCLK + 20) nano seconds */
udelay(1);
gpio_set_value(st->sample, 1);
- gpio_set_value(st->rdvel, iattr->address);
+ gpio_set_value(st->rdvel, !!(chan->type == IIO_ANGL));
ret = spi_read(st->sdev, st->rx, 2);
- if (ret < 0)
- goto error_ret;
- status = st->rx[1];
- if (iattr->address)
- pos = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
- else {
- vel = (st->rx[0] & 0x80) ? 0xf000 : 0;
- vel |= (((s16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
+ if (ret < 0) {
+ mutex_unlock(&st->lock);
+ return ret;
+ }
+
+ switch (chan->type) {
+ case IIO_ANGL:
+ *val = (((u16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
+ break;
+ case IIO_ANGL_VEL:
+ vel = (((s16)(st->rx[0])) << 4) | ((st->rx[1] & 0xF0) >> 4);
+ vel = (vel << 4) >> 4;
+ *val = vel;
+ default:
+ mutex_unlock(&st->lock);
+ return -EINVAL;
}
- len = sprintf(buf, "%d %c%c%c%c ", iattr->address ? pos : vel,
- (status & 0x8) ? 'P' : 'V',
- (status & 0x4) ? 'd' : '_',
- (status & 0x2) ? 'l' : '_',
- (status & 0x1) ? '1' : '0');
-error_ret:
/* delay (2 * AD2S120X_TSCLK + 20) ns for sample pulse */
udelay(1);
mutex_unlock(&st->lock);
-
- return ret ? ret : len;
+ return IIO_VAL_INT;
}
-static IIO_DEVICE_ATTR(pos, S_IRUGO, ad2s120x_show_val, NULL, 1);
-static IIO_DEVICE_ATTR(vel, S_IRUGO, ad2s120x_show_val, NULL, 0);
-
-static struct attribute *ad2s120x_attributes[] = {
- &iio_dev_attr_pos.dev_attr.attr,
- &iio_dev_attr_vel.dev_attr.attr,
- NULL,
-};
-
-static const struct attribute_group ad2s120x_attribute_group = {
- .attrs = ad2s120x_attributes,
+static const struct iio_chan_spec ad2s1200_channels[] = {
+ {
+ .type = IIO_ANGL,
+ .indexed = 1,
+ .channel = 0,
+ }, {
+ .type = IIO_ANGL_VEL,
+ .indexed = 1,
+ .channel = 0,
+ }
};
static const struct iio_info ad2s120x_info = {
- .attrs = &ad2s120x_attribute_group,
+ .read_raw = &ad2s1200_read_raw,
.driver_module = THIS_MODULE,
};
indio_dev->dev.parent = &spi->dev;
indio_dev->info = &ad2s120x_info;
indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = ad2s1200_channels;
+ indio_dev->num_channels = ARRAY_SIZE(ad2s1200_channels);
ret = iio_device_register(indio_dev);
if (ret)