On Fri, Oct 21, 2016 at 11:57:11PM +0100, André Przywara wrote: > Salut, > > On 11/10/16 15:28, Maxime Ripard wrote: > > 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 <[email protected]> > > --- > > 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++) { > > should be _m in the condition > > > 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++) { > > Same here: _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++) { > > And here: _m <= ... > > Interestingly those typos were already in the code before.
Good catches, I've amended the commit in my branch (since I apparently forgot to push...). Thanks! Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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