/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright ( c ) 2013 Samsung Electronics Co . , Ltd .
* Copyright ( c ) 2013 Linaro Ltd .
* Author : Thomas Abraham < thomas . ab @ samsung . com >
*
* Common Clock Framework support for all Samsung platforms
*/
#ifndef __SAMSUNG_CLK_H
#define __SAMSUNG_CLK_H
#include <linux/clk-provider.h>
#include <linux/mod_devicetable.h>
#include "clk-pll.h"
#include "clk-cpu.h"
/**
* struct samsung_clk_provider - information about clock provider
* @ reg_base : virtual address for the register base
* @ dev : clock provider device needed for runtime PM
* @ lock : maintains exclusion between callbacks for a given clock - provider
* @ clk_data : holds clock related data like clk_hw * and number of clocks
*/
struct samsung_clk_provider {
void __iomem *reg_base;
struct device *dev;
spinlock_t lock;
/* clk_data must be the last entry due to variable length 'hws' array */
struct clk_hw_onecell_data clk_data;
};
/**
* struct samsung_clock_alias - information about mux clock
* @ id : platform specific id of the clock
* @ dev_name : name of the device to which this clock belongs
* @ alias : optional clock alias name to be assigned to this clock
*/
struct samsung_clock_alias {
unsigned int id;
const char *dev_name;
const char *alias;
};
#define ALIAS(_id, dname, a) \
{ \
.id = _id, \
.dev_name = dname, \
.alias = a, \
}
#define MHZ (1000 * 1000 )
/**
* struct samsung_fixed_rate_clock - information about fixed - rate clock
* @ id : platform specific id of the clock
* @ name : name of this fixed - rate clock
* @ parent_name : optional parent clock name
* @ flags : optional fixed - rate clock flags
* @ fixed_rate : fixed clock rate of this clock
*/
struct samsung_fixed_rate_clock {
unsigned int id;
char *name;
const char *parent_name;
unsigned long flags;
unsigned long fixed_rate;
};
#define FRATE(_id, cname, pname, f, frate) \
{ \
.id = _id, \
.name = cname, \
.parent_name = pname, \
.flags = f, \
.fixed_rate = frate, \
}
/**
* struct samsung_fixed_factor_clock - information about fixed - factor clock
* @ id : platform specific id of the clock
* @ name : name of this fixed - factor clock
* @ parent_name : parent clock name
* @ mult : fixed multiplication factor
* @ div : fixed division factor
* @ flags : optional fixed - factor clock flags
*/
struct samsung_fixed_factor_clock {
unsigned int id;
char *name;
const char *parent_name;
unsigned long mult;
unsigned long div;
unsigned long flags;
};
#define FFACTOR(_id, cname, pname, m, d, f) \
{ \
.id = _id, \
.name = cname, \
.parent_name = pname, \
.mult = m, \
.div = d, \
.flags = f, \
}
/**
* struct samsung_mux_clock - information about mux clock
* @ id : platform specific id of the clock
* @ name : name of this mux clock
* @ parent_names : array of pointer to parent clock names
* @ num_parents : number of parents listed in @ parent_names
* @ flags : optional flags for basic clock
* @ offset : offset of the register for configuring the mux
* @ shift : starting bit location of the mux control bit - field in @ reg
* @ width : width of the mux control bit - field in @ reg
* @ mux_flags : flags for mux - type clock
*/
struct samsung_mux_clock {
unsigned int id;
const char *name;
const char *const *parent_names;
u8 num_parents;
unsigned long flags;
unsigned long offset;
u8 shift;
u8 width;
u8 mux_flags;
};
#define __MUX(_id, cname, pnames, o, s, w, f, mf) \
{ \
.id = _id, \
.name = cname, \
.parent_names = pnames, \
.num_parents = ARRAY_SIZE(pnames), \
.flags = f, \
.offset = o, \
.shift = s, \
.width = w, \
.mux_flags = mf, \
}
#define MUX(_id, cname, pnames, o, s, w) \
__MUX(_id, cname, pnames, o, s, w, CLK_SET_RATE_NO_REPARENT, 0 )
#define MUX_F(_id, cname, pnames, o, s, w, f, mf) \
__MUX(_id, cname, pnames, o, s, w, (f) | CLK_SET_RATE_NO_REPARENT, mf)
/* Used by MUX clocks where reparenting on clock rate change is allowed. */
#define nMUX(_id, cname, pnames, o, s, w) \
__MUX(_id, cname, pnames, o, s, w, 0 , 0 )
#define nMUX_F(_id, cname, pnames, o, s, w, f, mf) \
__MUX(_id, cname, pnames, o, s, w, f, mf)
/**
* struct samsung_div_clock - information about div clock
* @ id : platform specific id of the clock
* @ name : name of this div clock
* @ parent_name : name of the parent clock
* @ flags : optional flags for basic clock
* @ offset : offset of the register for configuring the div
* @ shift : starting bit location of the div control bit - field in @ reg
* @ width : width of the bitfield
* @ div_flags : flags for div - type clock
* @ table : array of divider / value pairs ending with a div set to 0
*/
struct samsung_div_clock {
unsigned int id;
const char *name;
const char *parent_name;
unsigned long flags;
unsigned long offset;
u8 shift;
u8 width;
u8 div_flags;
struct clk_div_table *table;
};
#define __DIV(_id, cname, pname, o, s, w, f, df, t) \
{ \
.id = _id, \
.name = cname, \
.parent_name = pname, \
.flags = f, \
.offset = o, \
.shift = s, \
.width = w, \
.div_flags = df, \
.table = t, \
}
#define DIV(_id, cname, pname, o, s, w) \
__DIV(_id, cname, pname, o, s, w, 0 , 0 , NULL)
#define DIV_F(_id, cname, pname, o, s, w, f, df) \
__DIV(_id, cname, pname, o, s, w, f, df, NULL)
#define DIV_T(_id, cname, pname, o, s, w, t) \
__DIV(_id, cname, pname, o, s, w, 0 , 0 , t)
/**
* struct samsung_gate_clock - information about gate clock
* @ id : platform specific id of the clock
* @ name : name of this gate clock
* @ parent_name : name of the parent clock
* @ flags : optional flags for basic clock
* @ offset : offset of the register for configuring the gate
* @ bit_idx : bit index of the gate control bit - field in @ reg
* @ gate_flags : flags for gate - type clock
*/
struct samsung_gate_clock {
unsigned int id;
const char *name;
const char *parent_name;
unsigned long flags;
unsigned long offset;
u8 bit_idx;
u8 gate_flags;
};
#define __GATE(_id, cname, pname, o, b, f, gf) \
{ \
.id = _id, \
.name = cname, \
.parent_name = pname, \
.flags = f, \
.offset = o, \
.bit_idx = b, \
.gate_flags = gf, \
}
#define GATE(_id, cname, pname, o, b, f, gf) \
__GATE(_id, cname, pname, o, b, f, gf)
#define PNAME(x) static const char * const x[] __initconst
/**
* struct samsung_clk_reg_dump - register dump of clock controller registers
* @ offset : clock register offset from the controller base address
* @ value : the value to be register at offset
*/
struct samsung_clk_reg_dump {
u32 offset;
u32 value;
};
/**
* struct samsung_pll_clock - information about pll clock
* @ id : platform specific id of the clock
* @ name : name of this pll clock
* @ parent_name : name of the parent clock
* @ flags : optional flags for basic clock
* @ con_offset : offset of the register for configuring the PLL
* @ lock_offset : offset of the register for locking the PLL
* @ type : type of PLL to be registered
* @ rate_table : array of PLL settings for possible PLL rates
*/
struct samsung_pll_clock {
unsigned int id;
const char *name;
const char *parent_name;
unsigned long flags;
int con_offset;
int lock_offset;
enum samsung_pll_type type;
const struct samsung_pll_rate_table *rate_table;
};
#define __PLL(_typ, _id, _name, _pname, _flags, _lock, _con, _rtable) \
{ \
.id = _id, \
.type = _typ, \
.name = _name, \
.parent_name = _pname, \
.flags = _flags, \
.con_offset = _con, \
.lock_offset = _lock, \
.rate_table = _rtable, \
}
#define PLL(_typ, _id, _name, _pname, _lock, _con, _rtable) \
__PLL(_typ, _id, _name, _pname, CLK_GET_RATE_NOCACHE, _lock, \
_con, _rtable)
struct samsung_cpu_clock {
unsigned int id;
const char *name;
unsigned int parent_id;
unsigned int alt_parent_id;
unsigned long flags;
int offset;
enum exynos_cpuclk_layout reg_layout;
const struct exynos_cpuclk_cfg_data *cfg;
};
#define CPU_CLK(_id, _name, _pid, _apid, _flags, _offset, _layout, _cfg) \
{ \
.id = _id, \
.name = _name, \
.parent_id = _pid, \
.alt_parent_id = _apid, \
.flags = _flags, \
.offset = _offset, \
.reg_layout = _layout, \
.cfg = _cfg, \
}
struct samsung_clock_reg_cache {
struct list_head node;
void __iomem *reg_base;
struct samsung_clk_reg_dump *rdump;
unsigned int rd_num;
const struct samsung_clk_reg_dump *rsuspend;
unsigned int rsuspend_num;
};
/**
* struct samsung_cmu_info - all clocks information needed for CMU registration
* @ pll_clks : list of PLL clocks
* @ nr_pll_clks : count of clocks in @ pll_clks
* @ mux_clks : list of mux clocks
* @ nr_mux_clks : count of clocks in @ mux_clks
* @ div_clks : list of div clocks
* @ nr_div_clks : count of clocks in @ div_clks
* @ gate_clks : list of gate clocks
* @ nr_gate_clks : count of clocks in @ gate_clks
* @ fixed_clks : list of fixed clocks
* @ nr_fixed_clks : count clocks in @ fixed_clks
* @ fixed_factor_clks : list of fixed factor clocks
* @ nr_fixed_factor_clks : count of clocks in @ fixed_factor_clks
* @ nr_clk_ids : total number of clocks with IDs assigned
* @ cpu_clks : list of CPU clocks
* @ nr_cpu_clks : count of clocks in @ cpu_clks
* @ clk_regs : list of clock registers
* @ nr_clk_regs : count of clock registers in @ clk_regs
* @ suspend_regs : list of clock registers to set before suspend
* @ nr_suspend_regs : count of clock registers in @ suspend_regs
* @ clk_name : name of the parent clock needed for CMU register access
* @ manual_plls : Enable manual control for PLL clocks
*/
struct samsung_cmu_info {
const struct samsung_pll_clock *pll_clks;
unsigned int nr_pll_clks;
const struct samsung_mux_clock *mux_clks;
unsigned int nr_mux_clks;
const struct samsung_div_clock *div_clks;
unsigned int nr_div_clks;
const struct samsung_gate_clock *gate_clks;
unsigned int nr_gate_clks;
const struct samsung_fixed_rate_clock *fixed_clks;
unsigned int nr_fixed_clks;
const struct samsung_fixed_factor_clock *fixed_factor_clks;
unsigned int nr_fixed_factor_clks;
unsigned int nr_clk_ids;
const struct samsung_cpu_clock *cpu_clks;
unsigned int nr_cpu_clks;
const unsigned long *clk_regs;
unsigned int nr_clk_regs;
const struct samsung_clk_reg_dump *suspend_regs;
unsigned int nr_suspend_regs;
const char *clk_name;
/* ARM64 Exynos CMUs */
bool manual_plls;
};
struct samsung_clk_provider *samsung_clk_init(struct device *dev,
void __iomem *base, unsigned long nr_clks);
void samsung_clk_of_add_provider(struct device_node *np,
struct samsung_clk_provider *ctx);
void samsung_clk_of_register_fixed_ext(
struct samsung_clk_provider *ctx,
struct samsung_fixed_rate_clock *fixed_rate_clk,
unsigned int nr_fixed_rate_clk,
const struct of_device_id *clk_matches);
void samsung_clk_add_lookup(struct samsung_clk_provider *ctx,
struct clk_hw *clk_hw, unsigned int id);
void samsung_clk_register_alias(struct samsung_clk_provider *ctx,
const struct samsung_clock_alias *list,
unsigned int nr_clk);
void samsung_clk_register_fixed_rate(
struct samsung_clk_provider *ctx,
const struct samsung_fixed_rate_clock *clk_list,
unsigned int nr_clk);
void samsung_clk_register_fixed_factor(
struct samsung_clk_provider *ctx,
const struct samsung_fixed_factor_clock *list,
unsigned int nr_clk);
void samsung_clk_register_mux(struct samsung_clk_provider *ctx,
const struct samsung_mux_clock *clk_list,
unsigned int nr_clk);
void samsung_clk_register_div(struct samsung_clk_provider *ctx,
const struct samsung_div_clock *clk_list,
unsigned int nr_clk);
void samsung_clk_register_gate(struct samsung_clk_provider *ctx,
const struct samsung_gate_clock *clk_list,
unsigned int nr_clk);
void samsung_clk_register_pll(struct samsung_clk_provider *ctx,
const struct samsung_pll_clock *pll_list,
unsigned int nr_clk);
void samsung_clk_register_cpu(struct samsung_clk_provider *ctx,
const struct samsung_cpu_clock *list, unsigned int nr_clk);
void samsung_cmu_register_clocks(struct samsung_clk_provider *ctx,
const struct samsung_cmu_info *cmu);
struct samsung_clk_provider *samsung_cmu_register_one(
struct device_node *,
const struct samsung_cmu_info *);
#ifdef CONFIG_PM_SLEEP
void samsung_clk_extended_sleep_init(void __iomem *reg_base,
const unsigned long *rdump,
unsigned long nr_rdump,
const struct samsung_clk_reg_dump *rsuspend,
unsigned long nr_rsuspend);
#else
static inline void samsung_clk_extended_sleep_init(void __iomem *reg_base,
const unsigned long *rdump,
unsigned long nr_rdump,
const struct samsung_clk_reg_dump *rsuspend,
unsigned long nr_rsuspend) {}
#endif
#define samsung_clk_sleep_init(reg_base, rdump, nr_rdump) \
samsung_clk_extended_sleep_init(reg_base, rdump, nr_rdump, NULL, 0 )
void samsung_clk_save(void __iomem *base,
struct samsung_clk_reg_dump *rd,
unsigned int num_regs);
void samsung_clk_restore(void __iomem *base,
const struct samsung_clk_reg_dump *rd,
unsigned int num_regs);
struct samsung_clk_reg_dump *samsung_clk_alloc_reg_dump(
const unsigned long *rdump,
unsigned long nr_rdump);
#endif /* __SAMSUNG_CLK_H */
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