Index: sys/arm/allwinner/clkng/aw_clk_nm.c
===================================================================
--- sys/arm/allwinner/clkng/aw_clk_nm.c
+++ sys/arm/allwinner/clkng/aw_clk_nm.c
@@ -136,6 +136,12 @@
 	return (0);
 }
 
+static inline uint64_t
+distance(uint64_t x, uint64_t y)
+{
+	return (x >= y ? x - y : y - x);
+}
+
 static uint64_t
 aw_clk_nm_find_best(struct aw_clk_nm_sc *sc, uint64_t fparent, uint64_t *fout,
     uint32_t *factor_n, uint32_t *factor_m)
@@ -153,7 +159,7 @@
 	for (m = min_m; m <= max_m; ) {
 		for (n = min_n; n <= max_n; ) {
 			cur = fparent / n / m;
-			if (abs(*fout - cur) < abs(*fout - best)) {
+			if (distance(*fout, cur) < distance(*fout, best)) {
 				best = cur;
 				*factor_n = n;
 				*factor_m = m;
@@ -196,7 +202,7 @@
 			clknode_get_freq(p_clk, &fparent);
 
 			cur = aw_clk_nm_find_best(sc, fparent, fout, &n, &m);
-			if (abs((*fout - cur)) < abs((*fout - best))) {
+			if (distance(*fout, cur) < distance(*fout, best)) {
 				best = cur;
 				best_parent = p_idx;
 				best_n = n;