iio: st_sensors: Create extended attr macro

Extend ST_SENSORS_LSM_CHANNELS() to a version that will accept extended
attributes named ST_SENSORS_LSM_CHANNELS_EXT() and wrap the former as a
specialized version of the former.

Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Denis Ciocca <denis.ciocca@st.com>
Cc: Daniel Drake <drake@endlessm.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20210518230722.522446-1-linus.walleij@linaro.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h
index 0b9aeb4..8e0d76b 100644 (file)
--- a/include/linux/iio/common/st_sensors.h
+++ b/include/linux/iio/common/st_sensors.h
@@ -48,8 +48,8 @@
 #define ST_SENSORS_MAX_NAME                    17
 #define ST_SENSORS_MAX_4WAI                    8
 
-#define ST_SENSORS_LSM_CHANNELS(device_type, mask, index, mod, \
-                                       ch2, s, endian, rbits, sbits, addr) \
+#define ST_SENSORS_LSM_CHANNELS_EXT(device_type, mask, index, mod, \
+                                   ch2, s, endian, rbits, sbits, addr, ext) \
 { \
        .type = device_type, \
        .modified = mod, \
@@ -65,8 +65,14 @@
                .storagebits = sbits, \
                .endianness = endian, \
        }, \
+       .ext_info = ext, \
 }
 
+#define ST_SENSORS_LSM_CHANNELS(device_type, mask, index, mod, \
+                               ch2, s, endian, rbits, sbits, addr)     \
+       ST_SENSORS_LSM_CHANNELS_EXT(device_type, mask, index, mod,      \
+                                   ch2, s, endian, rbits, sbits, addr, NULL)
+
 #define ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL() \
                IIO_DEV_ATTR_SAMP_FREQ_AVAIL( \
                        st_sensors_sysfs_sampling_frequency_avail)