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/*
* Copyright (c) 2014 MediaTek Inc.
* Author: James Liao <jamesjj.liao@mediatek.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __DRV_CLK_MTK_H
#define __DRV_CLK_MTK_H
#include <linux/regmap.h>
#include <linux/bitops.h>
#include <linux/clk-provider.h>
struct clk;
#define MAX_MUX_GATE_BIT 31
#define INVALID_MUX_GATE_BIT (MAX_MUX_GATE_BIT + 1)
#define MHZ (1000 * 1000)
struct mtk_fixed_clk {
int id;
const char *name;
const char *parent;
unsigned long rate;
};
#define FIXED_CLK(_id, _name, _parent, _rate) { \
.id = _id, \
.name = _name, \
.parent = _parent, \
.rate = _rate, \
}
void mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks,
int num, struct clk_onecell_data *clk_data);
struct mtk_fixed_factor {
int id;
const char *name;
const char *parent_name;
int mult;
int div;
};
#define FACTOR(_id, _name, _parent, _mult, _div) { \
.id = _id, \
.name = _name, \
.parent_name = _parent, \
.mult = _mult, \
.div = _div, \
}
void mtk_clk_register_factors(const struct mtk_fixed_factor *clks,
int num, struct clk_onecell_data *clk_data);
struct mtk_composite {
int id;
const char *name;
const char * const *parent_names;
const char *parent;
unsigned flags;
uint32_t mux_reg;
uint32_t divider_reg;
uint32_t gate_reg;
signed char mux_shift;
signed char mux_width;
signed char gate_shift;
signed char divider_shift;
signed char divider_width;
signed char num_parents;
};
/*
* In case the rate change propagation to parent clocks is undesirable,
* this macro allows to specify the clock flags manually.
*/
#define MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, _gate, _flags) { \
.id = _id, \
.name = _name, \
.mux_reg = _reg, \
.mux_shift = _shift, \
.mux_width = _width, \
.gate_reg = _reg, \
.gate_shift = _gate, \
.divider_shift = -1, \
.parent_names = _parents, \
.num_parents = ARRAY_SIZE(_parents), \
.flags = _flags, \
}
/*
* Unless necessary, all MUX_GATE clocks propagate rate changes to their
* parent clock by default.
*/
#define MUX_GATE(_id, _name, _parents, _reg, _shift, _width, _gate) \
MUX_GATE_FLAGS(_id, _name, _parents, _reg, _shift, _width, _gate, CLK_SET_RATE_PARENT)
#define MUX(_id, _name, _parents, _reg, _shift, _width) { \
.id = _id, \
.name = _name, \
.mux_reg = _reg, \
.mux_shift = _shift, \
.mux_width = _width, \
.gate_shift = -1, \
.divider_shift = -1, \
.parent_names = _parents, \
.num_parents = ARRAY_SIZE(_parents), \
.flags = CLK_SET_RATE_PARENT, \
}
#define DIV_GATE(_id, _name, _parent, _gate_reg, _gate_shift, _div_reg, _div_width, _div_shift) { \
.id = _id, \
.parent = _parent, \
.name = _name, \
.divider_reg = _div_reg, \
.divider_shift = _div_shift, \
.divider_width = _div_width, \
.gate_reg = _gate_reg, \
.gate_shift = _gate_shift, \
.mux_shift = -1, \
.flags = 0, \
}
struct clk *mtk_clk_register_composite(const struct mtk_composite *mc,
void __iomem *base, spinlock_t *lock);
void mtk_clk_register_composites(const struct mtk_composite *mcs,
int num, void __iomem *base, spinlock_t *lock,
struct clk_onecell_data *clk_data);
struct mtk_gate_regs {
u32 sta_ofs;
u32 clr_ofs;
u32 set_ofs;
};
struct mtk_gate {
int id;
const char *name;
const char *parent_name;
const struct mtk_gate_regs *regs;
int shift;
const struct clk_ops *ops;
};
int mtk_clk_register_gates(struct device_node *node, const struct mtk_gate *clks,
int num, struct clk_onecell_data *clk_data);
struct clk_onecell_data *mtk_alloc_clk_data(unsigned int clk_num);
#define HAVE_RST_BAR BIT(0)
struct mtk_pll_div_table {
u32 div;
unsigned long freq;
};
struct mtk_pll_data {
int id;
const char *name;
uint32_t reg;
uint32_t pwr_reg;
uint32_t en_mask;
uint32_t pd_reg;
uint32_t tuner_reg;
int pd_shift;
unsigned int flags;
const struct clk_ops *ops;
u32 rst_bar_mask;
unsigned long fmax;
int pcwbits;
uint32_t pcw_reg;
int pcw_shift;
const struct mtk_pll_div_table *div_table;
};
void mtk_clk_register_plls(struct device_node *node,
const struct mtk_pll_data *plls, int num_plls,
struct clk_onecell_data *clk_data);
struct clk *mtk_clk_register_ref2usb_tx(const char *name,
const char *parent_name, void __iomem *reg);
#ifdef CONFIG_RESET_CONTROLLER
void mtk_register_reset_controller(struct device_node *np,
unsigned int num_regs, int regofs);
#else
static inline void mtk_register_reset_controller(struct device_node *np,
unsigned int num_regs, int regofs)
{
}
#endif
#endif /* __DRV_CLK_MTK_H */
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