IIO: Add a modifier for x^2+y^2+z^2

There will probably be a number of such modifiers eventually but
this one is used in the adis16240 accelerometer driver.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index e42749e..bb3c692 100644 (file)
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -71,6 +71,7 @@ static const char * const iio_modifier_names[] = {
        [IIO_MOD_Y] = "y",
        [IIO_MOD_Z] = "z",
        [IIO_MOD_ROOT_SUM_SQUARED_X_Y] = "sqrt(x^2+y^2)",
+       [IIO_MOD_SUM_SQUARED_X_Y_Z] = "x^2+y^2+z^2",
        [IIO_MOD_LIGHT_BOTH] = "both",
        [IIO_MOD_LIGHT_IR] = "ir",
 };

diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 210559d..e250401 100644 (file)
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -45,6 +45,7 @@ enum iio_modifier {
        IIO_MOD_LIGHT_BOTH,
        IIO_MOD_LIGHT_IR,
        IIO_MOD_ROOT_SUM_SQUARED_X_Y,
+       IIO_MOD_SUM_SQUARED_X_Y_Z,
 };
 
 #define IIO_VAL_INT 1