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clk: actions: Add composite clock support 

Add support for Actions Semi composite clock. This clock
consists of gate, mux, divider, factor and fixed factor clocks.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
hifive-unleashed-5.1
Manivannan Sadhasivam 2018-03-26 23:09:03 +05:30 committed by Stephen Boyd
parent c535196446
commit bb150645ab
3 changed files with 324 additions and 0 deletions
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1
drivers/clk/actions/Makefile
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@ -5,3 +5,4 @@ clk-owl-y += owl-gate.o
clk-owl-y += owl-mux.o
clk-owl-y += owl-divider.o
clk-owl-y += owl-factor.o
clk-owl-y += owl-composite.o

199
drivers/clk/actions/owl-composite.c 100644
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@ -0,0 +1,199 @@
// SPDX-License-Identifier: GPL-2.0+
//
// OWL composite clock driver
//
// Copyright (c) 2014 Actions Semi Inc.
// Author: David Liu <liuwei@actions-semi.com>
//
// Copyright (c) 2018 Linaro Ltd.
// Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
#include <linux/clk-provider.h>
#include <linux/regmap.h>
#include "owl-composite.h"
static u8 owl_comp_get_parent(struct clk_hw *hw)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
return owl_mux_helper_get_parent(&comp->common, &comp->mux_hw);
}
static int owl_comp_set_parent(struct clk_hw *hw, u8 index)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
return owl_mux_helper_set_parent(&comp->common, &comp->mux_hw, index);
}
static void owl_comp_disable(struct clk_hw *hw)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
struct owl_clk_common *common = &comp->common;
owl_gate_set(common, &comp->gate_hw, false);
}
static int owl_comp_enable(struct clk_hw *hw)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
struct owl_clk_common *common = &comp->common;
owl_gate_set(common, &comp->gate_hw, true);
return 0;
}
static int owl_comp_is_enabled(struct clk_hw *hw)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
struct owl_clk_common *common = &comp->common;
return owl_gate_clk_is_enabled(common, &comp->gate_hw);
}
static long owl_comp_div_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
return owl_divider_helper_round_rate(&comp->common, &comp->rate.div_hw,
rate, parent_rate);
}
static unsigned long owl_comp_div_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
return owl_divider_helper_recalc_rate(&comp->common, &comp->rate.div_hw,
parent_rate);
}
static int owl_comp_div_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
return owl_divider_helper_set_rate(&comp->common, &comp->rate.div_hw,
rate, parent_rate);
}
static long owl_comp_fact_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
return owl_factor_helper_round_rate(&comp->common,
&comp->rate.factor_hw,
rate, parent_rate);
}
static unsigned long owl_comp_fact_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
return owl_factor_helper_recalc_rate(&comp->common,
&comp->rate.factor_hw,
parent_rate);
}
static int owl_comp_fact_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
return owl_factor_helper_set_rate(&comp->common,
&comp->rate.factor_hw,
rate, parent_rate);
}
static long owl_comp_fix_fact_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
struct clk_fixed_factor *fix_fact_hw = &comp->rate.fix_fact_hw;
return comp->fix_fact_ops->round_rate(&fix_fact_hw->hw, rate, parent_rate);
}
static unsigned long owl_comp_fix_fact_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct owl_composite *comp = hw_to_owl_comp(hw);
struct clk_fixed_factor *fix_fact_hw = &comp->rate.fix_fact_hw;
return comp->fix_fact_ops->recalc_rate(&fix_fact_hw->hw, parent_rate);
}
static int owl_comp_fix_fact_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
/*
* We must report success but we can do so unconditionally because
* owl_comp_fix_fact_round_rate returns values that ensure this call is
* a nop.
*/
return 0;
}
const struct clk_ops owl_comp_div_ops = {
/* mux_ops */
.get_parent = owl_comp_get_parent,
.set_parent = owl_comp_set_parent,
/* gate_ops */
.disable = owl_comp_disable,
.enable = owl_comp_enable,
.is_enabled = owl_comp_is_enabled,
/* div_ops */
.round_rate = owl_comp_div_round_rate,
.recalc_rate = owl_comp_div_recalc_rate,
.set_rate = owl_comp_div_set_rate,
};
const struct clk_ops owl_comp_fact_ops = {
/* mux_ops */
.get_parent = owl_comp_get_parent,
.set_parent = owl_comp_set_parent,
/* gate_ops */
.disable = owl_comp_disable,
.enable = owl_comp_enable,
.is_enabled = owl_comp_is_enabled,
/* fact_ops */
.round_rate = owl_comp_fact_round_rate,
.recalc_rate = owl_comp_fact_recalc_rate,
.set_rate = owl_comp_fact_set_rate,
};
const struct clk_ops owl_comp_fix_fact_ops = {
/* gate_ops */
.disable = owl_comp_disable,
.enable = owl_comp_enable,
.is_enabled = owl_comp_is_enabled,
/* fix_fact_ops */
.round_rate = owl_comp_fix_fact_round_rate,
.recalc_rate = owl_comp_fix_fact_recalc_rate,
.set_rate = owl_comp_fix_fact_set_rate,
};
const struct clk_ops owl_comp_pass_ops = {
/* mux_ops */
.get_parent = owl_comp_get_parent,
.set_parent = owl_comp_set_parent,
/* gate_ops */
.disable = owl_comp_disable,
.enable = owl_comp_enable,
.is_enabled = owl_comp_is_enabled,
};

124
drivers/clk/actions/owl-composite.h 100644
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@ -0,0 +1,124 @@
// SPDX-License-Identifier: GPL-2.0+
//
// OWL composite clock driver
//
// Copyright (c) 2014 Actions Semi Inc.
// Author: David Liu <liuwei@actions-semi.com>
//
// Copyright (c) 2018 Linaro Ltd.
// Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
#ifndef _OWL_COMPOSITE_H_
#define _OWL_COMPOSITE_H_
#include "owl-common.h"
#include "owl-mux.h"
#include "owl-gate.h"
#include "owl-factor.h"
#include "owl-fixed-factor.h"
#include "owl-divider.h"
union owl_rate {
struct owl_divider_hw div_hw;
struct owl_factor_hw factor_hw;
struct clk_fixed_factor fix_fact_hw;
};
struct owl_composite {
struct owl_mux_hw mux_hw;
struct owl_gate_hw gate_hw;
union owl_rate rate;
const struct clk_ops *fix_fact_ops;
struct owl_clk_common common;
};
#define OWL_COMP_DIV(_struct, _name, _parent, \
_mux, _gate, _div, _flags) \
struct owl_composite _struct = { \
.mux_hw = _mux, \
.gate_hw = _gate, \
.rate.div_hw = _div, \
.common = { \
.regmap = NULL, \
.hw.init = CLK_HW_INIT_PARENTS(_name, \
_parent, \
&owl_comp_div_ops,\
_flags), \
}, \
}
#define OWL_COMP_DIV_FIXED(_struct, _name, _parent, \
_gate, _div, _flags) \
struct owl_composite _struct = { \
.gate_hw = _gate, \
.rate.div_hw = _div, \
.common = { \
.regmap = NULL, \
.hw.init = CLK_HW_INIT(_name, \
_parent, \
&owl_comp_div_ops,\
_flags), \
}, \
}
#define OWL_COMP_FACTOR(_struct, _name, _parent, \
_mux, _gate, _factor, _flags) \
struct owl_composite _struct = { \
.mux_hw = _mux, \
.gate_hw = _gate, \
.rate.factor_hw = _factor, \
.common = { \
.regmap = NULL, \
.hw.init = CLK_HW_INIT_PARENTS(_name, \
_parent, \
&owl_comp_fact_ops,\
_flags), \
}, \
}
#define OWL_COMP_FIXED_FACTOR(_struct, _name, _parent, \
_gate, _mul, _div, _flags) \
struct owl_composite _struct = { \
.gate_hw = _gate, \
.rate.fix_fact_hw.mult = _mul, \
.rate.fix_fact_hw.div = _div, \
.fix_fact_ops = &clk_fixed_factor_ops, \
.common = { \
.regmap = NULL, \
.hw.init = CLK_HW_INIT(_name, \
_parent, \
&owl_comp_fix_fact_ops,\
_flags), \
}, \
}
#define OWL_COMP_PASS(_struct, _name, _parent, \
_mux, _gate, _flags) \
struct owl_composite _struct = { \
.mux_hw = _mux, \
.gate_hw = _gate, \
.common = { \
.regmap = NULL, \
.hw.init = CLK_HW_INIT_PARENTS(_name, \
_parent, \
&owl_comp_pass_ops,\
_flags), \
}, \
}
static inline struct owl_composite *hw_to_owl_comp(const struct clk_hw *hw)
{
struct owl_clk_common *common = hw_to_owl_clk_common(hw);
return container_of(common, struct owl_composite, common);
}
extern const struct clk_ops owl_comp_div_ops;
extern const struct clk_ops owl_comp_fact_ops;
extern const struct clk_ops owl_comp_fix_fact_ops;
extern const struct clk_ops owl_comp_pass_ops;
extern const struct clk_ops clk_fixed_factor_ops;
#endif /* _OWL_COMPOSITE_H_ */