[PATCH v4 4/9] clk: sunxi-ng: Add minimums for all the relevant structures and clocks
Maxime Ripard
maxime.ripard at free-electrons.com
Tue Oct 11 07:28:22 PDT 2016
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 at free-electrons.com>
---
drivers/clk/sunxi-ng/ccu_mult.c | 7 ++++++-
drivers/clk/sunxi-ng/ccu_nk.c | 12 ++++++++----
drivers/clk/sunxi-ng/ccu_nkm.c | 18 ++++++++++++------
drivers/clk/sunxi-ng/ccu_nkmp.c | 16 ++++++++++++----
drivers/clk/sunxi-ng/ccu_nm.c | 12 ++++++++----
5 files changed, 46 insertions(+), 19 deletions(-)
diff --git a/drivers/clk/sunxi-ng/ccu_mult.c b/drivers/clk/sunxi-ng/ccu_mult.c
index 32a1964439a2..6a02ffee5386 100644
--- a/drivers/clk/sunxi-ng/ccu_mult.c
+++ b/drivers/clk/sunxi-ng/ccu_mult.c
@@ -14,7 +14,7 @@
#include "ccu_mult.h"
struct _ccu_mult {
- unsigned long mult, max;
+ unsigned long mult, min, max;
};
static void ccu_mult_find_best(unsigned long parent, unsigned long rate,
@@ -23,6 +23,9 @@ static void ccu_mult_find_best(unsigned long parent, unsigned long rate,
int _mult;
_mult = rate / parent;
+ if (_mult < mult->min)
+ _mult = mult->min;
+
if (_mult > mult->max)
_mult = mult->max;
@@ -37,6 +40,7 @@ static unsigned long ccu_mult_round_rate(struct ccu_mux_internal *mux,
struct ccu_mult *cm = data;
struct _ccu_mult _cm;
+ _cm.min = 1;
_cm.max = 1 << cm->mult.width;
ccu_mult_find_best(parent_rate, rate, &_cm);
@@ -101,6 +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.max = 1 << cm->mult.width;
ccu_mult_find_best(parent_rate, rate, &_cm);
diff --git a/drivers/clk/sunxi-ng/ccu_nk.c b/drivers/clk/sunxi-ng/ccu_nk.c
index e7e2e75618ef..a42d870ba0ef 100644
--- a/drivers/clk/sunxi-ng/ccu_nk.c
+++ b/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);
diff --git a/drivers/clk/sunxi-ng/ccu_nkm.c b/drivers/clk/sunxi-ng/ccu_nkm.c
index 0b08d000eb38..b2a5fccf2f8c 100644
--- a/drivers/clk/sunxi-ng/ccu_nkm.c
+++ b/drivers/clk/sunxi-ng/ccu_nkm.c
@@ -14,9 +14,9 @@
#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,
@@ -26,9 +26,9 @@ 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++) {
- for (_n = 1; _n <= nkm->max_n; _n++) {
- for (_m = 1; _n <= nkm->max_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; _n <= nkm->max_m; _m++) {
unsigned long tmp_rate;
tmp_rate = parent * _n * _k / _m;
@@ -100,8 +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 = 1;
_nkm.max_n = 1 << nkm->n.width;
+ _nkm.min_k = 1;
_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);
@@ -126,8 +129,11 @@ static int ccu_nkm_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long flags;
u32 reg;
+ _nkm.min_n = 1;
_nkm.max_n = 1 << nkm->n.width;
+ _nkm.min_k = 1;
_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);
diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c
index 4b457d8cce11..2c1398192e48 100644
--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
@@ -27,10 +27,10 @@ static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate,
unsigned long best_n = 0, best_k = 0, best_m = 0, best_p = 0;
unsigned long _n, _k, _m, _p;
- for (_k = 1; _k <= nkmp->max_k; _k++) {
- for (_n = 1; _n <= nkm->max_n; _n++) {
- for (_m = 1; _n <= nkm->max_m; _m++) {
- for (_p = 1; _p <= nkmp->max_p; _p <<= 1) {
+ for (_k = nkmp->min_k; _k <= nkmp->max_k; _k++) {
+ for (_n = nkmp->min_n; _n <= nkmp->max_n; _n++) {
+ for (_m = nkmp->min_m; _n <= nkmp->max_m; _m++) {
+ for (_p = nkmp->min_p; _p <= nkmp->max_p; _p <<= 1) {
unsigned long tmp_rate;
tmp_rate = parent * _n * _k / (_m * _p);
@@ -107,9 +107,13 @@ 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.max_n = 1 << nkmp->n.width;
+ _nkmp.min_k = 1;
_nkmp.max_k = 1 << nkmp->k.width;
+ _nkmp.min_m = 1;
_nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width;
+ _nkmp.min_p = 1;
_nkmp.max_p = nkmp->p.max ?: 1 << ((1 << nkmp->p.width) - 1);
ccu_nkmp_find_best(*parent_rate, rate, &_nkmp);
@@ -125,9 +129,13 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long flags;
u32 reg;
+ _nkmp.min_n = 1;
_nkmp.max_n = 1 << nkmp->n.width;
+ _nkmp.min_k = 1;
_nkmp.max_k = 1 << nkmp->k.width;
+ _nkmp.min_m = 1;
_nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width;
+ _nkmp.min_p = 1;
_nkmp.max_p = nkmp->p.max ?: 1 << ((1 << nkmp->p.width) - 1);
ccu_nkmp_find_best(parent_rate, rate, &_nkmp);
diff --git a/drivers/clk/sunxi-ng/ccu_nm.c b/drivers/clk/sunxi-ng/ccu_nm.c
index c6d652289320..2a190bc032a9 100644
--- a/drivers/clk/sunxi-ng/ccu_nm.c
+++ b/drivers/clk/sunxi-ng/ccu_nm.c
@@ -15,8 +15,8 @@
#include "ccu_nm.h"
struct _ccu_nm {
- unsigned long n, max_n;
- unsigned long m, max_m;
+ unsigned long n, min_n, max_n;
+ unsigned long m, min_m, max_m;
};
static void ccu_nm_find_best(unsigned long parent, unsigned long rate,
@@ -26,8 +26,8 @@ static void ccu_nm_find_best(unsigned long parent, unsigned long rate,
unsigned long best_n = 0, best_m = 0;
unsigned long _n, _m;
- for (_n = 1; _n <= nm->max_n; _n++) {
- for (_m = 1; _n <= nm->max_m; _m++) {
+ for (_n = nm->min_n; _n <= nm->max_n; _n++) {
+ for (_m = nm->min_m; _n <= nm->max_m; _m++) {
unsigned long tmp_rate = parent * _n / _m;
if (tmp_rate > rate)
@@ -93,7 +93,9 @@ 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.max_n = 1 << nm->n.width;
+ _nm.min_m = 1;
_nm.max_m = nm->m.max ?: 1 << nm->m.width;
ccu_nm_find_best(*parent_rate, rate, &_nm);
@@ -114,7 +116,9 @@ static int ccu_nm_set_rate(struct clk_hw *hw, unsigned long rate,
else
ccu_frac_helper_disable(&nm->common, &nm->frac);
+ _nm.min_n = 1;
_nm.max_n = 1 << nm->n.width;
+ _nm.min_m = 1;
_nm.max_m = nm->m.max ?: 1 << nm->m.width;
ccu_nm_find_best(parent_rate, rate, &_nm);
--
git-series 0.8.10
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