From 2beaa601c849e72683a2dd0fe6fd77763f19f051 Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Fri, 30 Sep 2016 22:16:51 +0200 Subject: clk: sunxi-ng: Implement minimum for multipliers Allow the CCU drivers to specify a multiplier for their clocks. Signed-off-by: Maxime Ripard Acked-by: Chen-Yu Tsai --- drivers/clk/sunxi-ng/ccu_mult.c | 2 +- drivers/clk/sunxi-ng/ccu_mult.h | 13 +++++++++---- drivers/clk/sunxi-ng/ccu_nk.c | 8 ++++---- drivers/clk/sunxi-ng/ccu_nkm.c | 8 ++++---- drivers/clk/sunxi-ng/ccu_nkmp.c | 4 ++-- drivers/clk/sunxi-ng/ccu_nm.c | 2 +- 6 files changed, 21 insertions(+), 16 deletions(-) --- a/drivers/clk/sunxi-ng/ccu_mult.c +++ b/drivers/clk/sunxi-ng/ccu_mult.c @@ -105,7 +105,7 @@ static int ccu_mult_set_rate(struct clk_ ccu_mux_helper_adjust_parent_for_prediv(&cm->common, &cm->mux, -1, &parent_rate); - _cm.min = 1; + _cm.min = cm->mult.min; _cm.max = 1 << cm->mult.width; ccu_mult_find_best(parent_rate, rate, &_cm); --- a/drivers/clk/sunxi-ng/ccu_mult.h +++ b/drivers/clk/sunxi-ng/ccu_mult.h @@ -7,14 +7,19 @@ struct ccu_mult_internal { u8 shift; u8 width; + u8 min; }; -#define _SUNXI_CCU_MULT(_shift, _width) \ - { \ - .shift = _shift, \ - .width = _width, \ +#define _SUNXI_CCU_MULT_MIN(_shift, _width, _min) \ + { \ + .shift = _shift, \ + .width = _width, \ + .min = _min, \ } +#define _SUNXI_CCU_MULT(_shift, _width) \ + _SUNXI_CCU_MULT_MIN(_shift, _width, 1) + struct ccu_mult { u32 enable; --- a/drivers/clk/sunxi-ng/ccu_nk.c +++ b/drivers/clk/sunxi-ng/ccu_nk.c @@ -97,9 +97,9 @@ static long ccu_nk_round_rate(struct clk if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV) rate *= nk->fixed_post_div; - _nk.min_n = 1; + _nk.min_n = nk->n.min; _nk.max_n = 1 << nk->n.width; - _nk.min_k = 1; + _nk.min_k = nk->k.min; _nk.max_k = 1 << nk->k.width; ccu_nk_find_best(*parent_rate, rate, &_nk); @@ -122,9 +122,9 @@ static int ccu_nk_set_rate(struct clk_hw if (nk->common.features & CCU_FEATURE_FIXED_POSTDIV) rate = rate * nk->fixed_post_div; - _nk.min_n = 1; + _nk.min_n = nk->n.min; _nk.max_n = 1 << nk->n.width; - _nk.min_k = 1; + _nk.min_k = nk->k.min; _nk.max_k = 1 << nk->k.width; ccu_nk_find_best(parent_rate, rate, &_nk); --- a/drivers/clk/sunxi-ng/ccu_nkm.c +++ b/drivers/clk/sunxi-ng/ccu_nkm.c @@ -100,9 +100,9 @@ static unsigned long ccu_nkm_round_rate( struct ccu_nkm *nkm = data; struct _ccu_nkm _nkm; - _nkm.min_n = 1; + _nkm.min_n = nkm->n.min; _nkm.max_n = 1 << nkm->n.width; - _nkm.min_k = 1; + _nkm.min_k = nkm->k.min; _nkm.max_k = 1 << nkm->k.width; _nkm.min_m = 1; _nkm.max_m = nkm->m.max ?: 1 << nkm->m.width; @@ -129,9 +129,9 @@ static int ccu_nkm_set_rate(struct clk_h unsigned long flags; u32 reg; - _nkm.min_n = 1; + _nkm.min_n = nkm->n.min; _nkm.max_n = 1 << nkm->n.width; - _nkm.min_k = 1; + _nkm.min_k = nkm->k.min; _nkm.max_k = 1 << nkm->k.width; _nkm.min_m = 1; _nkm.max_m = nkm->m.max ?: 1 << nkm->m.width; --- a/drivers/clk/sunxi-ng/ccu_nkmp.c +++ b/drivers/clk/sunxi-ng/ccu_nkmp.c @@ -107,9 +107,9 @@ static long ccu_nkmp_round_rate(struct c struct ccu_nkmp *nkmp = hw_to_ccu_nkmp(hw); struct _ccu_nkmp _nkmp; - _nkmp.min_n = 1; + _nkmp.min_n = nkmp->n.min; _nkmp.max_n = 1 << nkmp->n.width; - _nkmp.min_k = 1; + _nkmp.min_k = nkmp->k.min; _nkmp.max_k = 1 << nkmp->k.width; _nkmp.min_m = 1; _nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width; --- a/drivers/clk/sunxi-ng/ccu_nm.c +++ b/drivers/clk/sunxi-ng/ccu_nm.c @@ -93,7 +93,7 @@ static long ccu_nm_round_rate(struct clk struct ccu_nm *nm = hw_to_ccu_nm(hw); struct _ccu_nm _nm; - _nm.min_n = 1; + _nm.min_n = nm->n.min; _nm.max_n = 1 << nm->n.width; _nm.min_m = 1; _nm.max_m = nm->m.max ?: 1 << nm->m.width;