| Message ID | ab8ef79d63fc09c3eaa556d299832ec06e9869cf.1484035021.git-series.maxime.ripard@free-electrons.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On Tue, Jan 10, 2017 at 3:57 PM, Maxime Ripard <maxime.ripard@free-electrons.com> wrote: > Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> > --- > drivers/clk/sunxi-ng/ccu_mult.c | 4 ++-- > drivers/clk/sunxi-ng/ccu_mult.h | 10 ++++++---- > drivers/clk/sunxi-ng/ccu_nk.c | 8 ++++---- > drivers/clk/sunxi-ng/ccu_nkm.c | 8 ++++---- > drivers/clk/sunxi-ng/ccu_nkmp.c | 8 ++++---- > drivers/clk/sunxi-ng/ccu_nm.c | 4 ++-- > 6 files changed, 22 insertions(+), 20 deletions(-) > > diff --git a/drivers/clk/sunxi-ng/ccu_mult.c b/drivers/clk/sunxi-ng/ccu_mult.c > index bf5e11c803f9..fccfe1e1961a 100644 > --- a/drivers/clk/sunxi-ng/ccu_mult.c > +++ b/drivers/clk/sunxi-ng/ccu_mult.c > @@ -41,7 +41,7 @@ static unsigned long ccu_mult_round_rate(struct ccu_mux_internal *mux, > struct _ccu_mult _cm; > > _cm.min = 1; > - _cm.max = 1 << cm->mult.width; > + _cm.max = cm->mult.max ?: 1 << cm->mult.width; Should you also factor in the offset when providing the default value for max? Otherwise you might end up with a value that is actually not progammable? Say if offset is 1, then max would be 1 << width. But if offset is 0, then max would have to be (1 << width) - 1, as (1 << width) is not valid. ChenYu > ccu_mult_find_best(parent_rate, rate, &_cm); > > return parent_rate * _cm.mult; > @@ -114,7 +114,7 @@ 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; > + _cm.max = cm->mult.max ?: 1 << cm->mult.width; > ccu_mult_find_best(parent_rate, rate, &_cm); > > spin_lock_irqsave(cm->common.lock, flags); > diff --git a/drivers/clk/sunxi-ng/ccu_mult.h b/drivers/clk/sunxi-ng/ccu_mult.h > index 84839641dfdf..524acddfcb2e 100644 > --- a/drivers/clk/sunxi-ng/ccu_mult.h > +++ b/drivers/clk/sunxi-ng/ccu_mult.h > @@ -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; > diff --git a/drivers/clk/sunxi-ng/ccu_nk.c b/drivers/clk/sunxi-ng/ccu_nk.c > index 90117d3ead8c..b9e9b8a9d1b4 100644 > --- a/drivers/clk/sunxi-ng/ccu_nk.c > +++ b/drivers/clk/sunxi-ng/ccu_nk.c > @@ -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); > > diff --git a/drivers/clk/sunxi-ng/ccu_nkm.c b/drivers/clk/sunxi-ng/ccu_nkm.c > index 3caaf9d603e2..71f81e95a061 100644 > --- a/drivers/clk/sunxi-ng/ccu_nkm.c > +++ b/drivers/clk/sunxi-ng/ccu_nkm.c > @@ -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; > > diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c > index da2bba02b845..a2b40a000157 100644 > --- a/drivers/clk/sunxi-ng/ccu_nkmp.c > +++ b/drivers/clk/sunxi-ng/ccu_nkmp.c > @@ -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; > diff --git a/drivers/clk/sunxi-ng/ccu_nm.c b/drivers/clk/sunxi-ng/ccu_nm.c > index 158d74e0215f..af71b1909cd9 100644 > --- a/drivers/clk/sunxi-ng/ccu_nm.c > +++ b/drivers/clk/sunxi-ng/ccu_nm.c > @@ -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; > > -- > git-series 0.8.11 -- To unsubscribe from this list: send the line "unsubscribe linux-clk" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, On Mon, Jan 16, 2017 at 01:58:18PM +0800, Chen-Yu Tsai wrote: > On Tue, Jan 10, 2017 at 3:57 PM, Maxime Ripard > <maxime.ripard@free-electrons.com> wrote: > > Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> > > --- > > drivers/clk/sunxi-ng/ccu_mult.c | 4 ++-- > > drivers/clk/sunxi-ng/ccu_mult.h | 10 ++++++---- > > drivers/clk/sunxi-ng/ccu_nk.c | 8 ++++---- > > drivers/clk/sunxi-ng/ccu_nkm.c | 8 ++++---- > > drivers/clk/sunxi-ng/ccu_nkmp.c | 8 ++++---- > > drivers/clk/sunxi-ng/ccu_nm.c | 4 ++-- > > 6 files changed, 22 insertions(+), 20 deletions(-) > > > > diff --git a/drivers/clk/sunxi-ng/ccu_mult.c b/drivers/clk/sunxi-ng/ccu_mult.c > > index bf5e11c803f9..fccfe1e1961a 100644 > > --- a/drivers/clk/sunxi-ng/ccu_mult.c > > +++ b/drivers/clk/sunxi-ng/ccu_mult.c > > @@ -41,7 +41,7 @@ static unsigned long ccu_mult_round_rate(struct ccu_mux_internal *mux, > > struct _ccu_mult _cm; > > > > _cm.min = 1; > > - _cm.max = 1 << cm->mult.width; > > + _cm.max = cm->mult.max ?: 1 << cm->mult.width; > > Should you also factor in the offset when providing the default > value for max? Otherwise you might end up with a value that is > actually not progammable? > > Say if offset is 1, then max would be 1 << width. > But if offset is 0, then max would have to be (1 << width) - 1, > as (1 << width) is not valid. Ah, yes, that's true. I'll fix it. Thanks! Maxime
diff --git a/drivers/clk/sunxi-ng/ccu_mult.c b/drivers/clk/sunxi-ng/ccu_mult.c index bf5e11c803f9..fccfe1e1961a 100644 --- a/drivers/clk/sunxi-ng/ccu_mult.c +++ b/drivers/clk/sunxi-ng/ccu_mult.c @@ -41,7 +41,7 @@ static unsigned long ccu_mult_round_rate(struct ccu_mux_internal *mux, struct _ccu_mult _cm; _cm.min = 1; - _cm.max = 1 << cm->mult.width; + _cm.max = cm->mult.max ?: 1 << cm->mult.width; ccu_mult_find_best(parent_rate, rate, &_cm); return parent_rate * _cm.mult; @@ -114,7 +114,7 @@ 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; + _cm.max = cm->mult.max ?: 1 << cm->mult.width; ccu_mult_find_best(parent_rate, rate, &_cm); spin_lock_irqsave(cm->common.lock, flags); diff --git a/drivers/clk/sunxi-ng/ccu_mult.h b/drivers/clk/sunxi-ng/ccu_mult.h index 84839641dfdf..524acddfcb2e 100644 --- a/drivers/clk/sunxi-ng/ccu_mult.h +++ b/drivers/clk/sunxi-ng/ccu_mult.h @@ -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; diff --git a/drivers/clk/sunxi-ng/ccu_nk.c b/drivers/clk/sunxi-ng/ccu_nk.c index 90117d3ead8c..b9e9b8a9d1b4 100644 --- a/drivers/clk/sunxi-ng/ccu_nk.c +++ b/drivers/clk/sunxi-ng/ccu_nk.c @@ -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); diff --git a/drivers/clk/sunxi-ng/ccu_nkm.c b/drivers/clk/sunxi-ng/ccu_nkm.c index 3caaf9d603e2..71f81e95a061 100644 --- a/drivers/clk/sunxi-ng/ccu_nkm.c +++ b/drivers/clk/sunxi-ng/ccu_nkm.c @@ -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; diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c index da2bba02b845..a2b40a000157 100644 --- a/drivers/clk/sunxi-ng/ccu_nkmp.c +++ b/drivers/clk/sunxi-ng/ccu_nkmp.c @@ -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; diff --git a/drivers/clk/sunxi-ng/ccu_nm.c b/drivers/clk/sunxi-ng/ccu_nm.c index 158d74e0215f..af71b1909cd9 100644 --- a/drivers/clk/sunxi-ng/ccu_nm.c +++ b/drivers/clk/sunxi-ng/ccu_nm.c @@ -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;
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> --- drivers/clk/sunxi-ng/ccu_mult.c | 4 ++-- drivers/clk/sunxi-ng/ccu_mult.h | 10 ++++++---- drivers/clk/sunxi-ng/ccu_nk.c | 8 ++++---- drivers/clk/sunxi-ng/ccu_nkm.c | 8 ++++---- drivers/clk/sunxi-ng/ccu_nkmp.c | 8 ++++---- drivers/clk/sunxi-ng/ccu_nm.c | 4 ++-- 6 files changed, 22 insertions(+), 20 deletions(-)