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clk: sunxi-ng: div: Add support for fixed post-divider

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SATA clock on sun4i/sun7i is of type (parent) / M / 6 where
6 is fixed post-divider.

Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
This commit is contained in:
Priit Laes 2017-08-12 20:43:50 +08:00 committed by Chen-Yu Tsai
parent 7e784240bd
commit 721353c030
2 changed files with 21 additions and 4 deletions
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22
drivers/clk/sunxi-ng/ccu_div.c
View File

@ -21,10 +21,18 @@ static unsigned long ccu_div_round_rate(struct ccu_mux_internal *mux,
{
struct ccu_div *cd = data;
return divider_round_rate_parent(&cd->common.hw, parent,
if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
rate *= cd->fixed_post_div;
rate = divider_round_rate_parent(&cd->common.hw, parent,
rate, parent_rate,
cd->div.table, cd->div.width,
cd->div.flags);
if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
rate /= cd->fixed_post_div;
return rate;
}
static void ccu_div_disable(struct clk_hw *hw)
@ -62,8 +70,13 @@ static unsigned long ccu_div_recalc_rate(struct clk_hw *hw,
parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1,
parent_rate);
return divider_recalc_rate(hw, parent_rate, val, cd->div.table,
cd->div.flags);
val = divider_recalc_rate(hw, parent_rate, val, cd->div.table,
cd->div.flags);
if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
val /= cd->fixed_post_div;
return val;
}
static int ccu_div_determine_rate(struct clk_hw *hw,
@ -86,6 +99,9 @@ static int ccu_div_set_rate(struct clk_hw *hw, unsigned long rate,
parent_rate = ccu_mux_helper_apply_prediv(&cd->common, &cd->mux, -1,
parent_rate);
if (cd->common.features & CCU_FEATURE_FIXED_POSTDIV)
rate *= cd->fixed_post_div;
val = divider_get_val(rate, parent_rate, cd->div.table, cd->div.width,
cd->div.flags);

3
drivers/clk/sunxi-ng/ccu_div.h
View File

@ -86,9 +86,10 @@ struct ccu_div_internal {
struct ccu_div {
u32 enable;
struct ccu_div_internal div;
struct ccu_div_internal div;
struct ccu_mux_internal mux;
struct ccu_common common;
unsigned int fixed_post_div;
};
#define SUNXI_CCU_DIV_TABLE_WITH_GATE(_struct, _name, _parent, _reg, \