clk: sunxi-ng: Implement minimum for multipliers

Allow the CCU drivers to specify a multiplier for their clocks.

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

diff --git a/drivers/clk/sunxi-ng/ccu_mult.c b/drivers/clk/sunxi-ng/ccu_mult.c
index 6a02ffe..678b6cb 100644 (file)
--- a/drivers/clk/sunxi-ng/ccu_mult.c
+++ b/drivers/clk/sunxi-ng/ccu_mult.c
@@ -105,7 +105,7 @@ static int ccu_mult_set_rate(struct clk_hw *hw, unsigned long rate,
        ccu_mux_helper_adjust_parent_for_prediv(&cm->common, &cm->mux, -1,
                                                &parent_rate);
 
-       _cm.min = 1;
+       _cm.min = cm->mult.min;
        _cm.max = 1 << cm->mult.width;
        ccu_mult_find_best(parent_rate, rate, &_cm);
 

diff --git a/drivers/clk/sunxi-ng/ccu_mult.h b/drivers/clk/sunxi-ng/ccu_mult.h
index 113780b..c1a2134 100644 (file)
--- a/drivers/clk/sunxi-ng/ccu_mult.h
+++ b/drivers/clk/sunxi-ng/ccu_mult.h
@@ -7,14 +7,19 @@
 struct ccu_mult_internal {
        u8      shift;
        u8      width;
+       u8      min;
 };
 
-#define _SUNXI_CCU_MULT(_shift, _width)                \
-       {                                       \
-               .shift  = _shift,               \
-               .width  = _width,               \
+#define _SUNXI_CCU_MULT_MIN(_shift, _width, _min)      \
+       {                                               \
+               .shift  = _shift,                       \
+               .width  = _width,                       \
+               .min    = _min,                         \
        }
 
+#define _SUNXI_CCU_MULT(_shift, _width)                \
+       _SUNXI_CCU_MULT_MIN(_shift, _width, 1)
+
 struct ccu_mult {
        u32                     enable;
 

diff --git a/drivers/clk/sunxi-ng/ccu_nk.c b/drivers/clk/sunxi-ng/ccu_nk.c
index a42d870..eaf0fdf 100644 (file)
--- a/drivers/clk/sunxi-ng/ccu_nk.c
+++ b/drivers/clk/sunxi-ng/ccu_nk.c
@@ -97,9 +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.min_n = nk->n.min;
        _nk.max_n = 1 << nk->n.width;
-       _nk.min_k = 1;
+       _nk.min_k = nk->k.min;
        _nk.max_k = 1 << nk->k.width;
 
        ccu_nk_find_best(*parent_rate, rate, &_nk);
@@ -122,9 +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.min_n = nk->n.min;
        _nk.max_n = 1 << nk->n.width;
-       _nk.min_k = 1;
+       _nk.min_k = nk->k.min;
        _nk.max_k = 1 << nk->k.width;
 
        ccu_nk_find_best(parent_rate, rate, &_nk);

diff --git a/drivers/clk/sunxi-ng/ccu_nkm.c b/drivers/clk/sunxi-ng/ccu_nkm.c
index 4217732..9b840a4 100644 (file)
--- a/drivers/clk/sunxi-ng/ccu_nkm.c
+++ b/drivers/clk/sunxi-ng/ccu_nkm.c
@@ -100,9 +100,9 @@ static unsigned long ccu_nkm_round_rate(struct ccu_mux_internal *mux,
        struct ccu_nkm *nkm = data;
        struct _ccu_nkm _nkm;
 
-       _nkm.min_n = 1;
+       _nkm.min_n = nkm->n.min;
        _nkm.max_n = 1 << nkm->n.width;
-       _nkm.min_k = 1;
+       _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;
@@ -129,9 +129,9 @@ static int ccu_nkm_set_rate(struct clk_hw *hw, unsigned long rate,
        unsigned long flags;
        u32 reg;
 
-       _nkm.min_n = 1;
+       _nkm.min_n = nkm->n.min;
        _nkm.max_n = 1 << nkm->n.width;
-       _nkm.min_k = 1;
+       _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;

diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c
index 67c856e..684c42d 100644 (file)
--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
@@ -107,9 +107,9 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
        struct ccu_nkmp *nkmp = hw_to_ccu_nkmp(hw);
        struct _ccu_nkmp _nkmp;
 
-       _nkmp.min_n = 1;
+       _nkmp.min_n = nkmp->n.min;
        _nkmp.max_n = 1 << nkmp->n.width;
-       _nkmp.min_k = 1;
+       _nkmp.min_k = nkmp->k.min;
        _nkmp.max_k = 1 << nkmp->k.width;
        _nkmp.min_m = 1;
        _nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width;

diff --git a/drivers/clk/sunxi-ng/ccu_nm.c b/drivers/clk/sunxi-ng/ccu_nm.c
index 1dae4f3..c9f3b6c 100644 (file)
--- a/drivers/clk/sunxi-ng/ccu_nm.c
+++ b/drivers/clk/sunxi-ng/ccu_nm.c
@@ -93,7 +93,7 @@ static long ccu_nm_round_rate(struct clk_hw *hw, unsigned long rate,
        struct ccu_nm *nm = hw_to_ccu_nm(hw);
        struct _ccu_nm _nm;
 
-       _nm.min_n = 1;
+       _nm.min_n = nm->n.min;
        _nm.max_n = 1 << nm->n.width;
        _nm.min_m = 1;
        _nm.max_m = nm->m.max ?: 1 << nm->m.width;