1 files changed, 25 insertions, 20 deletions

diff --git a/drivers/clk/sunxi-ng/ccu_nkm.c b/drivers/clk/sunxi-ng/ccu_nkm.c
index 059fdc3b4f96..9b840a47a94d 100644
--- a/drivers/clk/sunxi-ng/ccu_nkm.c
+++ b/drivers/clk/sunxi-ng/ccu_nkm.c
@@ -9,15 +9,14 @@
  */
 
 #include <linux/clk-provider.h>
-#include <linux/rational.h>
 
 #include "ccu_gate.h"
 #include "ccu_nkm.h"
 
 struct _ccu_nkm {
-	unsigned long	n, max_n;
-	unsigned long	k, max_k;
-	unsigned long	m, max_m;
+	unsigned long	n, min_n, max_n;
+	unsigned long	k, min_k, max_k;
+	unsigned long	m, min_m, max_m;
 };
 
 static void ccu_nkm_find_best(unsigned long parent, unsigned long rate,
@@ -27,22 +26,22 @@ static void ccu_nkm_find_best(unsigned long parent, unsigned long rate,
 	unsigned long best_n = 0, best_k = 0, best_m = 0;
 	unsigned long _n, _k, _m;
 
-	for (_k = 1; _k <= nkm->max_k; _k++) {
-		unsigned long tmp_rate;
-
-		rational_best_approximation(rate / _k, parent,
-					    nkm->max_n, nkm->max_m, &_n, &_m);
-
-		tmp_rate = parent * _n * _k / _m;
-
-		if (tmp_rate > rate)
-			continue;
-
-		if ((rate - tmp_rate) < (rate - best_rate)) {
-			best_rate = tmp_rate;
-			best_n = _n;
-			best_k = _k;
-			best_m = _m;
+	for (_k = nkm->min_k; _k <= nkm->max_k; _k++) {
+		for (_n = nkm->min_n; _n <= nkm->max_n; _n++) {
+			for (_m = nkm->min_m; _m <= nkm->max_m; _m++) {
+				unsigned long tmp_rate;
+
+				tmp_rate = parent * _n * _k / _m;
+
+				if (tmp_rate > rate)
+					continue;
+				if ((rate - tmp_rate) < (rate - best_rate)) {
+					best_rate = tmp_rate;
+					best_n = _n;
+					best_k = _k;
+					best_m = _m;
+				}
+			}
 		}
 	}
 
@@ -101,8 +100,11 @@ static unsigned long ccu_nkm_round_rate(struct ccu_mux_internal *mux,
 	struct ccu_nkm *nkm = data;
 	struct _ccu_nkm _nkm;
 
+	_nkm.min_n = nkm->n.min;
 	_nkm.max_n = 1 << nkm->n.width;
+	_nkm.min_k = nkm->k.min;
 	_nkm.max_k = 1 << nkm->k.width;
+	_nkm.min_m = 1;
 	_nkm.max_m = nkm->m.max ?: 1 << nkm->m.width;
 
 	ccu_nkm_find_best(parent_rate, rate, &_nkm);
@@ -127,8 +129,11 @@ static int ccu_nkm_set_rate(struct clk_hw *hw, unsigned long rate,
 	unsigned long flags;
 	u32 reg;
 
+	_nkm.min_n = nkm->n.min;
 	_nkm.max_n = 1 << nkm->n.width;
+	_nkm.min_k = nkm->k.min;
 	_nkm.max_k = 1 << nkm->k.width;
+	_nkm.min_m = 1;
 	_nkm.max_m = nkm->m.max ?: 1 << nkm->m.width;
 
 	ccu_nkm_find_best(parent_rate, rate, &_nkm);