[PATCH v5 05/23] iio: dac: ad3530r: #undef field_prep() before local definition

[Geert Uytterhoeven]

Prepare for the advent of a globally available common field_prep() macro
by undefining the symbol before defining a local variant.  This prevents
redefinition warnings from the C preprocessor when introducing the common
macro later.

Suggested-by: Yury Norov <yury.norov at gmail.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
--
v5:
  - New.
---
 drivers/iio/dac/ad3530r.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/dac/ad3530r.c b/drivers/iio/dac/ad3530r.c
index 6134613777b8e1d4..5684d11137f29948 100644
--- a/drivers/iio/dac/ad3530r.c
+++ b/drivers/iio/dac/ad3530r.c
@@ -54,6 +54,7 @@
 #define AD3531R_MAX_CHANNELS			4
 
 /* Non-constant mask variant of FIELD_PREP() */
+#undef field_prep
 #define field_prep(_mask, _val)	(((_val) << (ffs(_mask) - 1)) & (_mask))
 
 enum ad3530r_mode {
-- 
2.43.0