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clk: sunxi-ng: Implement multiplier maximum 

Some multipliers have a maximum rate that is lower than what the register
width allows to. Add a field in the multiplier structure to allow CCU
driver to set that maximum.

Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Maxime Ripard 2016-10-14 12:08:19 +02:00
parent c9520be383
commit 0c3c8e1358
6 changed files with 32 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/clk/sunxi-ng/ccu_mult.c
View File

@ -41,7 +41,12 @@ static unsigned long ccu_mult_round_rate(struct ccu_mux_internal *mux,
struct _ccu_mult _cm;
_cm.min = cm->mult.min;
_cm.max = 1 << cm->mult.width;
if (cm->mult.max)
_cm.max = cm->mult.max;
else
_cm.max = (1 << cm->mult.width) + cm->mult.offset - 1;
ccu_mult_find_best(parent_rate, rate, &_cm);
return parent_rate * _cm.mult;
@ -114,7 +119,12 @@ static int ccu_mult_set_rate(struct clk_hw *hw, unsigned long rate,
&parent_rate);
_cm.min = cm->mult.min;
_cm.max = 1 << cm->mult.width;
if (cm->mult.max)
_cm.max = cm->mult.max;
else
_cm.max = (1 << cm->mult.width) + cm->mult.offset - 1;
ccu_mult_find_best(parent_rate, rate, &_cm);
spin_lock_irqsave(cm->common.lock, flags);

10
drivers/clk/sunxi-ng/ccu_mult.h
View File

@ -10,24 +10,26 @@ struct ccu_mult_internal {
u8 shift;
u8 width;
u8 min;
u8 max;
};
#define _SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, _offset, _min) \
#define _SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, _offset, _min, _max) \
{ \
.min = _min, \
.max = _max, \
.offset = _offset, \
.shift = _shift, \
.width = _width, \
}
#define _SUNXI_CCU_MULT_MIN(_shift, _width, _min) \
_SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, 1, _min)
_SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, 1, _min, 0)
#define _SUNXI_CCU_MULT_OFFSET(_shift, _width, _offset) \
_SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, _offset, 1)
_SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, _offset, 1, 0)
#define _SUNXI_CCU_MULT(_shift, _width) \
_SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, 1, 1)
_SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, 1, 1, 0)
struct ccu_mult {
u32 enable;

8
drivers/clk/sunxi-ng/ccu_nk.c
View File

@ -103,9 +103,9 @@ static long ccu_nk_round_rate(struct clk_hw *hw, unsigned long rate,
rate *= nk->fixed_post_div;
_nk.min_n = nk->n.min;
_nk.max_n = 1 << nk->n.width;
_nk.max_n = nk->n.max ?: 1 << nk->n.width;
_nk.min_k = nk->k.min;
_nk.max_k = 1 << nk->k.width;
_nk.max_k = nk->k.max ?: 1 << nk->k.width;
ccu_nk_find_best(*parent_rate, rate, &_nk);
rate = *parent_rate * _nk.n * _nk.k;
@ -128,9 +128,9 @@ static int ccu_nk_set_rate(struct clk_hw *hw, unsigned long rate,
rate = rate * nk->fixed_post_div;
_nk.min_n = nk->n.min;
_nk.max_n = 1 << nk->n.width;
_nk.max_n = nk->n.max ?: 1 << nk->n.width;
_nk.min_k = nk->k.min;
_nk.max_k = 1 << nk->k.width;
_nk.max_k = nk->k.max ?: 1 << nk->k.width;
ccu_nk_find_best(parent_rate, rate, &_nk);

8
drivers/clk/sunxi-ng/ccu_nkm.c
View File

@ -110,9 +110,9 @@ static unsigned long ccu_nkm_round_rate(struct ccu_mux_internal *mux,
struct _ccu_nkm _nkm;
_nkm.min_n = nkm->n.min;
_nkm.max_n = 1 << nkm->n.width;
_nkm.max_n = nkm->n.max ?: 1 << nkm->n.width;
_nkm.min_k = nkm->k.min;
_nkm.max_k = 1 << nkm->k.width;
_nkm.max_k = nkm->k.max ?: 1 << nkm->k.width;
_nkm.min_m = 1;
_nkm.max_m = nkm->m.max ?: 1 << nkm->m.width;
@ -139,9 +139,9 @@ static int ccu_nkm_set_rate(struct clk_hw *hw, unsigned long rate,
u32 reg;
_nkm.min_n = nkm->n.min;
_nkm.max_n = 1 << nkm->n.width;
_nkm.max_n = nkm->n.max ?: 1 << nkm->n.width;
_nkm.min_k = nkm->k.min;
_nkm.max_k = 1 << nkm->k.width;
_nkm.max_k = nkm->k.max ?: 1 << nkm->k.width;
_nkm.min_m = 1;
_nkm.max_m = nkm->m.max ?: 1 << nkm->m.width;

8
drivers/clk/sunxi-ng/ccu_nkmp.c
View File

@ -117,9 +117,9 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
struct _ccu_nkmp _nkmp;
_nkmp.min_n = nkmp->n.min;
_nkmp.max_n = 1 << nkmp->n.width;
_nkmp.max_n = nkmp->n.max ?: 1 << nkmp->n.width;
_nkmp.min_k = nkmp->k.min;
_nkmp.max_k = 1 << nkmp->k.width;
_nkmp.max_k = nkmp->k.max ?: 1 << nkmp->k.width;
_nkmp.min_m = 1;
_nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width;
_nkmp.min_p = 1;
@ -139,9 +139,9 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
u32 reg;
_nkmp.min_n = 1;
_nkmp.max_n = 1 << nkmp->n.width;
_nkmp.max_n = nkmp->n.max ?: 1 << nkmp->n.width;
_nkmp.min_k = 1;
_nkmp.max_k = 1 << nkmp->k.width;
_nkmp.max_k = nkmp->k.max ?: 1 << nkmp->k.width;
_nkmp.min_m = 1;
_nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width;
_nkmp.min_p = 1;

4
drivers/clk/sunxi-ng/ccu_nm.c
View File

@ -100,7 +100,7 @@ static long ccu_nm_round_rate(struct clk_hw *hw, unsigned long rate,
struct _ccu_nm _nm;
_nm.min_n = nm->n.min;
_nm.max_n = 1 << nm->n.width;
_nm.max_n = nm->n.max ?: 1 << nm->n.width;
_nm.min_m = 1;
_nm.max_m = nm->m.max ?: 1 << nm->m.width;
@ -123,7 +123,7 @@ static int ccu_nm_set_rate(struct clk_hw *hw, unsigned long rate,
ccu_frac_helper_disable(&nm->common, &nm->frac);
_nm.min_n = 1;
_nm.max_n = 1 << nm->n.width;
_nm.max_n = nm->n.max ?: 1 << nm->n.width;
_nm.min_m = 1;
_nm.max_m = nm->m.max ?: 1 << nm->m.width;