iio:ad7266: Mark transfer buffer as __be16

Fixes the following warnings from sparse:
	drivers/iio/adc/ad7266.c:140:16: warning: cast to restricted __be16
	drivers/iio/adc/ad7266.c:140:16: warning: cast to restricted __be16
	drivers/iio/adc/ad7266.c:140:16: warning: cast to restricted __be16
	drivers/iio/adc/ad7266.c:140:16: warning: cast to restricted __be16

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

1 files changed, 12 insertions, 9 deletions

diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
index 58e945594c7b..70f78c3062a7 100644
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -43,19 +43,22 @@ struct ad7266_state {
          * The buffer needs to be large enough to hold two samples (4 bytes) and
          * the naturally aligned timestamp (8 bytes).
          */
-        uint8_t data[ALIGN(4, sizeof(s64)) + sizeof(s64)] ____cacheline_aligned;
+        struct {
+                __be16 sample[2];
+                s64 timestamp;
+        } data ____cacheline_aligned;
 };
 
 static int ad7266_wakeup(struct ad7266_state *st)
 {
         /* Any read with >= 2 bytes will wake the device */
-        return spi_read(st->spi, st->data, 2);
+        return spi_read(st->spi, &st->data.sample[0], 2);
 }
 
 static int ad7266_powerdown(struct ad7266_state *st)
 {
         /* Any read with < 2 bytes will powerdown the device */
-        return spi_read(st->spi, st->data, 1);
+        return spi_read(st->spi, &st->data.sample[0], 1);
 }
 
 static int ad7266_preenable(struct iio_dev *indio_dev)
@@ -84,9 +87,9 @@ static irqreturn_t ad7266_trigger_handler(int irq, void *p)
         struct ad7266_state *st = iio_priv(indio_dev);
         int ret;
 
-        ret = spi_read(st->spi, st->data, 4);
+        ret = spi_read(st->spi, st->data.sample, 4);
         if (ret == 0) {
-                iio_push_to_buffers_with_timestamp(indio_dev, st->data,
+                iio_push_to_buffers_with_timestamp(indio_dev, &st->data,
                             pf->timestamp);
         }
 
@@ -137,7 +140,7 @@ static int ad7266_read_single(struct ad7266_state *st, int *val,
         ad7266_select_input(st, address);
 
         ret = spi_sync(st->spi, &st->single_msg);
-        *val = be16_to_cpu(st->data[address % 2]);
+        *val = be16_to_cpu(st->data.sample[address % 2]);
 
         return ret;
 }
@@ -442,15 +445,15 @@ static int ad7266_probe(struct spi_device *spi)
         ad7266_init_channels(indio_dev);
 
         /* wakeup */
-        st->single_xfer[0].rx_buf = &st->data;
+        st->single_xfer[0].rx_buf = &st->data.sample[0];
         st->single_xfer[0].len = 2;
         st->single_xfer[0].cs_change = 1;
         /* conversion */
-        st->single_xfer[1].rx_buf = &st->data;
+        st->single_xfer[1].rx_buf = st->data.sample;
         st->single_xfer[1].len = 4;
         st->single_xfer[1].cs_change = 1;
         /* powerdown */
-        st->single_xfer[2].tx_buf = &st->data;
+        st->single_xfer[2].tx_buf = &st->data.sample[0];
         st->single_xfer[2].len = 1;
 
         spi_message_init(&st->single_msg);