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>
diff --git a/drivers/clk/sunxi-ng/ccu_mult.c b/drivers/clk/sunxi-ng/ccu_mult.c
index 32a1964..6a02ffe 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 @@
int _mult;
_mult = rate / parent;
+ if (_mult < mult->min)
+ _mult = mult->min;
+
if (_mult > mult->max)
_mult = mult->max;
@@ -37,6 +40,7 @@
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 @@
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 e7e2e75..a42d870 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 @@
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 @@
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 @@
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 0b08d00..4217732 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 @@
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; _m <= nkm->max_m; _m++) {
unsigned long tmp_rate;
tmp_rate = parent * _n * _k / _m;
@@ -100,8 +100,11 @@
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 @@
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 fcf6757..67c856e 100644
--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
@@ -14,10 +14,10 @@
#include "ccu_nkmp.h"
struct _ccu_nkmp {
- unsigned long n, max_n;
- unsigned long k, max_k;
- unsigned long m, max_m;
- unsigned long p, max_p;
+ unsigned long n, min_n, max_n;
+ unsigned long k, min_k, max_k;
+ unsigned long m, min_m, max_m;
+ unsigned long p, min_p, max_p;
};
static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate,
@@ -27,10 +27,10 @@
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 <= nkmp->max_n; _n++) {
- for (_m = 1; _n <= nkmp->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; _m <= 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 @@
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 @@
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 c6d6522..1dae4f3 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 @@
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; _m <= nm->max_m; _m++) {
unsigned long tmp_rate = parent * _n / _m;
if (tmp_rate > rate)
@@ -93,7 +93,9 @@
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 @@
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);