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clk: sunxi-ng: multiplier: Add fractional support 

Some clocks on the earlier SoCs such as the video PLLs are multipliers with
fractional settings.

Support those cases.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
hifive-unleashed-5.1
Maxime Ripard 2016-10-13 12:44:55 +02:00
parent d0f11d14b0
commit d77e8135b3
2 changed files with 10 additions and 0 deletions
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8
drivers/clk/sunxi-ng/ccu_mult.c
View File

@ -75,6 +75,9 @@ static unsigned long ccu_mult_recalc_rate(struct clk_hw *hw,
unsigned long val;
u32 reg;
if (ccu_frac_helper_is_enabled(&cm->common, &cm->frac))
return ccu_frac_helper_read_rate(&cm->common, &cm->frac);
reg = readl(cm->common.base + cm->common.reg);
val = reg >> cm->mult.shift;
val &= (1 << cm->mult.width) - 1;
@ -102,6 +105,11 @@ static int ccu_mult_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long flags;
u32 reg;
if (ccu_frac_helper_has_rate(&cm->common, &cm->frac, rate))
return ccu_frac_helper_set_rate(&cm->common, &cm->frac, rate);
else
ccu_frac_helper_disable(&cm->common, &cm->frac);
ccu_mux_helper_adjust_parent_for_prediv(&cm->common, &cm->mux, -1,
&parent_rate);

2
drivers/clk/sunxi-ng/ccu_mult.h
View File

@ -2,6 +2,7 @@
#define _CCU_MULT_H_
#include "ccu_common.h"
#include "ccu_frac.h"
#include "ccu_mux.h"
struct ccu_mult_internal {
@ -23,6 +24,7 @@ struct ccu_mult_internal {
struct ccu_mult {
u32 enable;
struct ccu_frac_internal frac;
struct ccu_mult_internal mult;
struct ccu_mux_internal mux;
struct ccu_common common;