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clk: sunxi-ng: Avoid computing the rate twice

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The ccu_*_find_best() functions already compute a best_rate at the same
time as the other factors. Return this value so the caller does not need
to duplicate the computation.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Link: https://lore.kernel.org/r/20221231173055.42384-1-samuel@sholland.org
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
This commit is contained in:
Samuel Holland 2022-12-31 11:30:55 -06:00 committed by Jernej Skrabec
parent 5ee541ae71
commit 657f477a89
5 changed files with 26 additions and 23 deletions
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11
drivers/clk/sunxi-ng/ccu_mp.c
View File

@ -10,9 +10,9 @@
#include "ccu_gate.h"
#include "ccu_mp.h"
static void ccu_mp_find_best(unsigned long parent, unsigned long rate,
unsigned int max_m, unsigned int max_p,
unsigned int *m, unsigned int *p)
static unsigned long ccu_mp_find_best(unsigned long parent, unsigned long rate,
unsigned int max_m, unsigned int max_p,
unsigned int *m, unsigned int *p)
{
unsigned long best_rate = 0;
unsigned int best_m = 0, best_p = 0;
@ -35,6 +35,8 @@ static void ccu_mp_find_best(unsigned long parent, unsigned long rate,
*m = best_m;
*p = best_p;
return best_rate;
}
static unsigned long ccu_mp_find_best_with_parent_adj(struct clk_hw *hw,
@ -109,8 +111,7 @@ static unsigned long ccu_mp_round_rate(struct ccu_mux_internal *mux,
max_p = cmp->p.max ?: 1 << ((1 << cmp->p.width) - 1);
if (!clk_hw_can_set_rate_parent(&cmp->common.hw)) {
ccu_mp_find_best(*parent_rate, rate, max_m, max_p, &m, &p);
rate = *parent_rate / p / m;
rate = ccu_mp_find_best(*parent_rate, rate, max_m, max_p, &m, &p);
} else {
rate = ccu_mp_find_best_with_parent_adj(hw, parent_rate, rate,
max_m, max_p);

9
drivers/clk/sunxi-ng/ccu_nk.c
View File

@ -15,8 +15,8 @@ struct _ccu_nk {
unsigned long k, min_k, max_k;
};
static void ccu_nk_find_best(unsigned long parent, unsigned long rate,
struct _ccu_nk *nk)
static unsigned long ccu_nk_find_best(unsigned long parent, unsigned long rate,
struct _ccu_nk *nk)
{
unsigned long best_rate = 0;
unsigned int best_k = 0, best_n = 0;
@ -39,6 +39,8 @@ static void ccu_nk_find_best(unsigned long parent, unsigned long rate,
nk->k = best_k;
nk->n = best_n;
return best_rate;
}
static void ccu_nk_disable(struct clk_hw *hw)
@ -104,8 +106,7 @@ static long ccu_nk_round_rate(struct clk_hw *hw, unsigned long rate,
_nk.min_k = nk->k.min ?: 1;
_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;
rate = ccu_nk_find_best(*parent_rate, rate, &_nk);
if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV)
rate = rate / nk->fixed_post_div;

10
drivers/clk/sunxi-ng/ccu_nkm.c
View File

@ -16,8 +16,8 @@ struct _ccu_nkm {
unsigned long m, min_m, max_m;
};
static void ccu_nkm_find_best(unsigned long parent, unsigned long rate,
struct _ccu_nkm *nkm)
static unsigned long ccu_nkm_find_best(unsigned long parent, unsigned long rate,
struct _ccu_nkm *nkm)
{
unsigned long best_rate = 0;
unsigned long best_n = 0, best_k = 0, best_m = 0;
@ -45,6 +45,8 @@ static void ccu_nkm_find_best(unsigned long parent, unsigned long rate,
nkm->n = best_n;
nkm->k = best_k;
nkm->m = best_m;
return best_rate;
}
static void ccu_nkm_disable(struct clk_hw *hw)
@ -122,9 +124,7 @@ static unsigned long ccu_nkm_round_rate(struct ccu_mux_internal *mux,
if (nkm->common.features & CCU_FEATURE_FIXED_POSTDIV)
rate *= nkm->fixed_post_div;
ccu_nkm_find_best(*parent_rate, rate, &_nkm);
rate = *parent_rate * _nkm.n * _nkm.k / _nkm.m;
rate = ccu_nkm_find_best(*parent_rate, rate, &_nkm);
if (nkm->common.features & CCU_FEATURE_FIXED_POSTDIV)
rate /= nkm->fixed_post_div;

10
drivers/clk/sunxi-ng/ccu_nkmp.c
View File

@ -29,8 +29,8 @@ static unsigned long ccu_nkmp_calc_rate(unsigned long parent,
return rate;
}
static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate,
struct _ccu_nkmp *nkmp)
static unsigned long ccu_nkmp_find_best(unsigned long parent, unsigned long rate,
struct _ccu_nkmp *nkmp)
{
unsigned long best_rate = 0;
unsigned long best_n = 0, best_k = 0, best_m = 0, best_p = 0;
@ -65,6 +65,8 @@ static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate,
nkmp->k = best_k;
nkmp->m = best_m;
nkmp->p = best_p;
return best_rate;
}
static void ccu_nkmp_disable(struct clk_hw *hw)
@ -150,10 +152,8 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
_nkmp.min_p = 1;
_nkmp.max_p = nkmp->p.max ?: 1 << ((1 << nkmp->p.width) - 1);
ccu_nkmp_find_best(*parent_rate, rate, &_nkmp);
rate = ccu_nkmp_find_best(*parent_rate, rate, &_nkmp);
rate = ccu_nkmp_calc_rate(*parent_rate, _nkmp.n, _nkmp.k,
_nkmp.m, _nkmp.p);
if (nkmp->common.features & CCU_FEATURE_FIXED_POSTDIV)
rate = rate / nkmp->fixed_post_div;

9
drivers/clk/sunxi-ng/ccu_nm.c
View File

@ -27,8 +27,8 @@ static unsigned long ccu_nm_calc_rate(unsigned long parent,
return rate;
}
static void ccu_nm_find_best(unsigned long parent, unsigned long rate,
struct _ccu_nm *nm)
static unsigned long ccu_nm_find_best(unsigned long parent, unsigned long rate,
struct _ccu_nm *nm)
{
unsigned long best_rate = 0;
unsigned long best_n = 0, best_m = 0;
@ -52,6 +52,8 @@ static void ccu_nm_find_best(unsigned long parent, unsigned long rate,
nm->n = best_n;
nm->m = best_m;
return best_rate;
}
static void ccu_nm_disable(struct clk_hw *hw)
@ -157,8 +159,7 @@ static long ccu_nm_round_rate(struct clk_hw *hw, unsigned long rate,
_nm.min_m = 1;
_nm.max_m = nm->m.max ?: 1 << nm->m.width;
ccu_nm_find_best(*parent_rate, rate, &_nm);
rate = ccu_nm_calc_rate(*parent_rate, _nm.n, _nm.m);
rate = ccu_nm_find_best(*parent_rate, rate, &_nm);
if (nm->common.features & CCU_FEATURE_FIXED_POSTDIV)
rate /= nm->fixed_post_div;