1 files changed, 26 insertions, 4 deletions

diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c
index be2098d62b8b..7f2f45a0a48d 100644
--- a/drivers/iio/adc/ad7476.c
+++ b/drivers/iio/adc/ad7476.c
@@ -23,9 +23,12 @@
 
 #define RES_MASK(bits)  ((1 << (bits)) - 1)
 
+struct ad7476_state;
+
 struct ad7476_chip_info {
         unsigned int                    int_vref_uv;
         struct iio_chan_spec            channel[2];
+        void (*reset)(struct ad7476_state *);
 };
 
 struct ad7476_state {
@@ -45,6 +48,7 @@ struct ad7476_state {
 };
 
 enum ad7476_supported_device_ids {
+        ID_AD7091R,
         ID_AD7276,
         ID_AD7277,
         ID_AD7278,
@@ -79,6 +83,12 @@ done:
         return IRQ_HANDLED;
 }
 
+static void ad7091_reset(struct ad7476_state *st)
+{
+        /* Any transfers with 8 scl cycles will reset the device */
+        spi_read(st->spi, st->data, 1);
+}
+
 static int ad7476_scan_direct(struct ad7476_state *st)
 {
         int ret;
@@ -130,11 +140,11 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
         return -EINVAL;
 }
 
-#define _AD7476_CHAN(bits, _shift)                              \
+#define _AD7476_CHAN(bits, _shift, _info_mask)                  \
         {                                                       \
         .type = IIO_VOLTAGE,                                    \
         .indexed = 1,                                           \
-        .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |           \
+        .info_mask = _info_mask |                               \
         IIO_CHAN_INFO_SCALE_SHARED_BIT,                         \
         .scan_type = {                                          \
                 .sign = 'u',                                    \
@@ -145,10 +155,18 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
         },                                                      \
 }
 
-#define AD7476_CHAN(bits) _AD7476_CHAN((bits), 13 - (bits))
-#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits))
+#define AD7476_CHAN(bits) _AD7476_CHAN((bits), 13 - (bits), \
+                IIO_CHAN_INFO_RAW_SEPARATE_BIT)
+#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \
+                IIO_CHAN_INFO_RAW_SEPARATE_BIT)
+#define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0)
 
 static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
+        [ID_AD7091R] = {
+                .channel[0] = AD7091R_CHAN(12),
+                .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
+                .reset = ad7091_reset,
+        },
         [ID_AD7276] = {
                 .channel[0] = AD7940_CHAN(12),
                 .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
@@ -238,6 +256,9 @@ static int __devinit ad7476_probe(struct spi_device *spi)
         if (ret)
                 goto error_disable_reg;
 
+        if (st->chip_info->reset)
+                st->chip_info->reset(st);
+
         ret = iio_device_register(indio_dev);
         if (ret)
                 goto error_ring_unregister;
@@ -271,6 +292,7 @@ static int __devexit ad7476_remove(struct spi_device *spi)
 }
 
 static const struct spi_device_id ad7476_id[] = {
+        {"ad7091r", ID_AD7091R},
         {"ad7273", ID_AD7277},
         {"ad7274", ID_AD7276},
         {"ad7276", ID_AD7276},