diff --git a/sys/arm/allwinner/clkng/aw_clk_nm.c b/sys/arm/allwinner/clkng/aw_clk_nm.c
index dc560cca5622..27caf3374266 100644
--- a/sys/arm/allwinner/clkng/aw_clk_nm.c
+++ b/sys/arm/allwinner/clkng/aw_clk_nm.c
@@ -151,7 +151,7 @@ aw_clk_nm_find_best(struct aw_clk_nm_sc *sc, uint64_t fparent, uint64_t *fout,
 	min_n = aw_clk_factor_get_min(&sc->n);
 
 	for (m = min_m; m <= max_m; ) {
-		for (n = min_m; n <= max_n; ) {
+		for (n = min_n; n <= max_n; ) {
 			cur = fparent / n / m;
 			if (abs(*fout - cur) < abs(*fout - best)) {
 				best = cur;
@@ -196,7 +196,7 @@ aw_clk_nm_set_freq(struct clknode *clk, uint64_t fparent, uint64_t *fout,
 			clknode_get_freq(p_clk, &fparent);
 
 			cur = aw_clk_nm_find_best(sc, fparent, fout, &n, &m);
-			if ((*fout - cur) < (*fout - best)) {
+			if (abs((*fout - cur)) < abs((*fout - best))) {
 				best = cur;
 				best_parent = p_idx;
 				best_n = n;