[PATCH] iio: frequency: ad983x: replace do_div() with div64_ul().

[Joshua Crofts <joshua.crofts1@gmail.com>]

Coccinelle reported the following in both ad983x drivers:
do_div() does a 64-by-32 division, please consider using
div64_ul instead.

Fix this by replacing do_div() with div64_ul(), which
safely handles 64-bit dividends and unsigned long
divisors across all architectures.

Signed-off-by: Joshua Crofts <joshua.crofts1@gmail.com>
---
 drivers/staging/iio/frequency/ad9832.c | 3 ++-
 drivers/staging/iio/frequency/ad9834.c | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/iio/frequency/ad9832.c b/drivers/staging/iio/frequency/ad9832.c
index b87ea1781b..61ee93263a 100644
--- a/drivers/staging/iio/frequency/ad9832.c
+++ b/drivers/staging/iio/frequency/ad9832.c
@@ -13,6 +13,7 @@
 #include <linux/device.h>
 #include <linux/err.h>
 #include <linux/kernel.h>
+#include <linux/math64.h>
 #include <linux/module.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
@@ -115,7 +116,7 @@ static unsigned long ad9832_calc_freqreg(unsigned long mclk, unsigned long fout)
 {
 	unsigned long long freqreg = (u64)fout *
 				     (u64)((u64)1L << AD9832_FREQ_BITS);
-	do_div(freqreg, mclk);
+	freqreg = div64_ul(freqreg, mclk);
 	return freqreg;
 }
 
diff --git a/drivers/staging/iio/frequency/ad9834.c b/drivers/staging/iio/frequency/ad9834.c
index d339d5e8e0..83d0e1360c 100644
--- a/drivers/staging/iio/frequency/ad9834.c
+++ b/drivers/staging/iio/frequency/ad9834.c
@@ -10,6 +10,7 @@
 #include <linux/workqueue.h>
 #include <linux/device.h>
 #include <linux/kernel.h>
+#include <linux/math64.h>
 #include <linux/slab.h>
 #include <linux/sysfs.h>
 #include <linux/list.h>
@@ -101,7 +102,7 @@ static unsigned int ad9834_calc_freqreg(unsigned long mclk, unsigned long fout)
 {
 	unsigned long long freqreg = (u64)fout * (u64)BIT(AD9834_FREQ_BITS);
 
-	do_div(freqreg, mclk);
+	freqreg = div64_ul(freqreg, mclk);
 	return freqreg;
 }
 
-- 
2.47.3