clk: sunxi-ng: Add minimums for all the relevant structures and clocks

Modify the current clocks we have to be able to specify the minimum for
each clocks we support, just like we support the max.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>

drivers/clk/sunxi-ng/ccu_nk.c

@@ -14,8 +14,8 @@
 #include "ccu_nk.h"
 
 struct _ccu_nk {
-	unsigned long	n, max_n;
-	unsigned long	k, max_k;
+	unsigned long	n, min_n, max_n;
+	unsigned long	k, min_k, max_k;
 };
 
 static void ccu_nk_find_best(unsigned long parent, unsigned long rate,
@@ -25,8 +25,8 @@ static void ccu_nk_find_best(unsigned long parent, unsigned long rate,
 	unsigned int best_k = 0, best_n = 0;
 	unsigned int _k, _n;
 
-	for (_k = 1; _k <= nk->max_k; _k++) {
-		for (_n = 1; _n <= nk->max_n; _n++) {
+	for (_k = nk->min_k; _k <= nk->max_k; _k++) {
+		for (_n = nk->min_n; _n <= nk->max_n; _n++) {
 			unsigned long tmp_rate = parent * _n * _k;
 
 			if (tmp_rate > rate)
@@ -97,7 +97,9 @@ static long ccu_nk_round_rate(struct clk_hw *hw, unsigned long rate,
 	if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV)
 		rate *= nk->fixed_post_div;
 
+	_nk.min_n = 1;
 	_nk.max_n = 1 << nk->n.width;
+	_nk.min_k = 1;
 	_nk.max_k = 1 << nk->k.width;
 
 	ccu_nk_find_best(*parent_rate, rate, &_nk);
@@ -120,7 +122,9 @@ static int ccu_nk_set_rate(struct clk_hw *hw, unsigned long rate,
 	if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV)
 		rate = rate * nk->fixed_post_div;
 
+	_nk.min_n = 1;
 	_nk.max_n = 1 << nk->n.width;
+	_nk.min_k = 1;
 	_nk.max_k = 1 << nk->k.width;
 
 	ccu_nk_find_best(parent_rate, rate, &_nk);