iio: dac: ad5686: Constify static struct iio_chan_spec

These are never modified and can be made const to allow the compiler to
put it in read-only memory.

Before:
   text    data     bss     dec     hex filename
   6642   12608      64   19314    4b72 drivers/iio/dac/ad5686.o

After:
   text    data     bss     dec     hex filename
  16946    2304      64   19314    4b72 drivers/iio/dac/ad5686.o

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Acked-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/dac/ad5686.c b/drivers/iio/dac/ad5686.c
index 56cf9344d187d908f409ca111ac09fc509b7ae32..148d9541f5173d2d3f86590f6a957cb235ec8ab3 100644 (file)
--- a/drivers/iio/dac/ad5686.c
+++ b/drivers/iio/dac/ad5686.c
@@ -206,12 +206,12 @@ static const struct iio_chan_spec_ext_info ad5686_ext_info[] = {
 }
 
 #define DECLARE_AD5693_CHANNELS(name, bits, _shift)            \
-static struct iio_chan_spec name[] = {                         \
+static const struct iio_chan_spec name[] = {                   \
                AD5868_CHANNEL(0, 0, bits, _shift),             \
 }
 
 #define DECLARE_AD5686_CHANNELS(name, bits, _shift)            \
-static struct iio_chan_spec name[] = {                         \
+static const struct iio_chan_spec name[] = {                   \
                AD5868_CHANNEL(0, 1, bits, _shift),             \
                AD5868_CHANNEL(1, 2, bits, _shift),             \
                AD5868_CHANNEL(2, 4, bits, _shift),             \
@@ -219,7 +219,7 @@ static struct iio_chan_spec name[] = {                              \
 }
 
 #define DECLARE_AD5676_CHANNELS(name, bits, _shift)            \
-static struct iio_chan_spec name[] = {                         \
+static const struct iio_chan_spec name[] = {                   \
                AD5868_CHANNEL(0, 0, bits, _shift),             \
                AD5868_CHANNEL(1, 1, bits, _shift),             \
                AD5868_CHANNEL(2, 2, bits, _shift),             \
@@ -231,7 +231,7 @@ static struct iio_chan_spec name[] = {                              \
 }
 
 #define DECLARE_AD5679_CHANNELS(name, bits, _shift)            \
-static struct iio_chan_spec name[] = {                         \
+static const struct iio_chan_spec name[] = {                   \
                AD5868_CHANNEL(0, 0, bits, _shift),             \
                AD5868_CHANNEL(1, 1, bits, _shift),             \
                AD5868_CHANNEL(2, 2, bits, _shift),             \

diff --git a/drivers/iio/dac/ad5686.h b/drivers/iio/dac/ad5686.h
index 52009b5eef8819aeec24bb3d26d2b0d89d01d077..a15f2970577e9625be4be67fcad3139ef49fb12a 100644 (file)
--- a/drivers/iio/dac/ad5686.h
+++ b/drivers/iio/dac/ad5686.h
@@ -104,7 +104,7 @@ typedef int (*ad5686_read_func)(struct ad5686_state *st, u8 addr);
 struct ad5686_chip_info {
        u16                             int_vref_mv;
        unsigned int                    num_channels;
-       struct iio_chan_spec            *channels;
+       const struct iio_chan_spec      *channels;
        enum ad5686_regmap_type         regmap_type;
 };