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clk: sunxi-ng: Implement multiplier maximum
Some multipliers have a maximum rate that is lower than what the register width allows to. Add a field in the multiplier structure to allow CCU driver to set that maximum. Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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@ -41,7 +41,12 @@ static unsigned long ccu_mult_round_rate(struct ccu_mux_internal *mux,
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struct _ccu_mult _cm;
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_cm.min = cm->mult.min;
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_cm.max = 1 << cm->mult.width;
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if (cm->mult.max)
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_cm.max = cm->mult.max;
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else
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_cm.max = (1 << cm->mult.width) + cm->mult.offset - 1;
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ccu_mult_find_best(parent_rate, rate, &_cm);
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return parent_rate * _cm.mult;
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@ -114,7 +119,12 @@ static int ccu_mult_set_rate(struct clk_hw *hw, unsigned long rate,
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&parent_rate);
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_cm.min = cm->mult.min;
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_cm.max = 1 << cm->mult.width;
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if (cm->mult.max)
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_cm.max = cm->mult.max;
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else
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_cm.max = (1 << cm->mult.width) + cm->mult.offset - 1;
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ccu_mult_find_best(parent_rate, rate, &_cm);
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spin_lock_irqsave(cm->common.lock, flags);
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@ -10,24 +10,26 @@ struct ccu_mult_internal {
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u8 shift;
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u8 width;
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u8 min;
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u8 max;
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};
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#define _SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, _offset, _min) \
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#define _SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, _offset, _min, _max) \
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{ \
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.min = _min, \
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.max = _max, \
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.offset = _offset, \
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.shift = _shift, \
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.width = _width, \
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}
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#define _SUNXI_CCU_MULT_MIN(_shift, _width, _min) \
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_SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, 1, _min)
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_SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, 1, _min, 0)
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#define _SUNXI_CCU_MULT_OFFSET(_shift, _width, _offset) \
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_SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, _offset, 1)
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_SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, _offset, 1, 0)
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#define _SUNXI_CCU_MULT(_shift, _width) \
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_SUNXI_CCU_MULT_OFFSET_MIN(_shift, _width, 1, 1)
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_SUNXI_CCU_MULT_OFFSET_MIN_MAX(_shift, _width, 1, 1, 0)
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struct ccu_mult {
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u32 enable;
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@ -103,9 +103,9 @@ static long ccu_nk_round_rate(struct clk_hw *hw, unsigned long rate,
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rate *= nk->fixed_post_div;
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_nk.min_n = nk->n.min;
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_nk.max_n = 1 << nk->n.width;
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_nk.max_n = nk->n.max ?: 1 << nk->n.width;
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_nk.min_k = nk->k.min;
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_nk.max_k = 1 << nk->k.width;
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_nk.max_k = nk->k.max ?: 1 << nk->k.width;
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ccu_nk_find_best(*parent_rate, rate, &_nk);
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rate = *parent_rate * _nk.n * _nk.k;
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@ -128,9 +128,9 @@ static int ccu_nk_set_rate(struct clk_hw *hw, unsigned long rate,
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rate = rate * nk->fixed_post_div;
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_nk.min_n = nk->n.min;
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_nk.max_n = 1 << nk->n.width;
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_nk.max_n = nk->n.max ?: 1 << nk->n.width;
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_nk.min_k = nk->k.min;
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_nk.max_k = 1 << nk->k.width;
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_nk.max_k = nk->k.max ?: 1 << nk->k.width;
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ccu_nk_find_best(parent_rate, rate, &_nk);
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@ -110,9 +110,9 @@ static unsigned long ccu_nkm_round_rate(struct ccu_mux_internal *mux,
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struct _ccu_nkm _nkm;
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_nkm.min_n = nkm->n.min;
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_nkm.max_n = 1 << nkm->n.width;
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_nkm.max_n = nkm->n.max ?: 1 << nkm->n.width;
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_nkm.min_k = nkm->k.min;
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_nkm.max_k = 1 << nkm->k.width;
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_nkm.max_k = nkm->k.max ?: 1 << nkm->k.width;
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_nkm.min_m = 1;
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_nkm.max_m = nkm->m.max ?: 1 << nkm->m.width;
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@ -139,9 +139,9 @@ static int ccu_nkm_set_rate(struct clk_hw *hw, unsigned long rate,
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u32 reg;
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_nkm.min_n = nkm->n.min;
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_nkm.max_n = 1 << nkm->n.width;
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_nkm.max_n = nkm->n.max ?: 1 << nkm->n.width;
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_nkm.min_k = nkm->k.min;
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_nkm.max_k = 1 << nkm->k.width;
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_nkm.max_k = nkm->k.max ?: 1 << nkm->k.width;
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_nkm.min_m = 1;
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_nkm.max_m = nkm->m.max ?: 1 << nkm->m.width;
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@ -117,9 +117,9 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
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struct _ccu_nkmp _nkmp;
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_nkmp.min_n = nkmp->n.min;
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_nkmp.max_n = 1 << nkmp->n.width;
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_nkmp.max_n = nkmp->n.max ?: 1 << nkmp->n.width;
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_nkmp.min_k = nkmp->k.min;
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_nkmp.max_k = 1 << nkmp->k.width;
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_nkmp.max_k = nkmp->k.max ?: 1 << nkmp->k.width;
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_nkmp.min_m = 1;
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_nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width;
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_nkmp.min_p = 1;
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@ -139,9 +139,9 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
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u32 reg;
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_nkmp.min_n = 1;
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_nkmp.max_n = 1 << nkmp->n.width;
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_nkmp.max_n = nkmp->n.max ?: 1 << nkmp->n.width;
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_nkmp.min_k = 1;
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_nkmp.max_k = 1 << nkmp->k.width;
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_nkmp.max_k = nkmp->k.max ?: 1 << nkmp->k.width;
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_nkmp.min_m = 1;
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_nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width;
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_nkmp.min_p = 1;
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@ -100,7 +100,7 @@ static long ccu_nm_round_rate(struct clk_hw *hw, unsigned long rate,
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struct _ccu_nm _nm;
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_nm.min_n = nm->n.min;
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_nm.max_n = 1 << nm->n.width;
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_nm.max_n = nm->n.max ?: 1 << nm->n.width;
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_nm.min_m = 1;
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_nm.max_m = nm->m.max ?: 1 << nm->m.width;
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@ -123,7 +123,7 @@ static int ccu_nm_set_rate(struct clk_hw *hw, unsigned long rate,
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ccu_frac_helper_disable(&nm->common, &nm->frac);
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_nm.min_n = 1;
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_nm.max_n = 1 << nm->n.width;
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_nm.max_n = nm->n.max ?: 1 << nm->n.width;
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_nm.min_m = 1;
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_nm.max_m = nm->m.max ?: 1 << nm->m.width;
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