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Commit d77e8135 authored by Maxime Ripard's avatar Maxime Ripard
Browse files

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: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: default avatarChen-Yu Tsai <wens@csie.org>
parent d0f11d14

drivers/clk/sunxi-ng/ccu_mult.c

+8 −0
Original line number Diff line number Diff line
@@ -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);

drivers/clk/sunxi-ng/ccu_mult.h

+2 −0
Original line number Diff line number Diff line
@@ -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;