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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SH_CLOCK_H
#define __SH_CLOCK_H
#include <linux/list.h>
#include <linux/seq_file.h>
#include <linux/cpufreq.h>
#include <linux/types.h>
#include <linux/kref.h>
#include <linux/clk.h>
#include <linux/err.h>
struct clk;
struct clk_mapping {
phys_addr_t phys;
void __iomem *base;
unsigned long len;
struct kref ref;
};
struct sh_clk_ops {
#ifdef CONFIG_SH_CLK_CPG_LEGACY
void (*init)(struct clk *clk);
#endif
int (*enable)(struct clk *clk);
void (*disable)(struct clk *clk);
unsigned long (*recalc)(struct clk *clk);
int (*set_rate)(struct clk *clk, unsigned long rate);
int (*set_parent)(struct clk *clk, struct clk *parent);
long (*round_rate)(struct clk *clk, unsigned long rate);
};
#define SH_CLK_DIV_MSK(div) ((1 << (div)) - 1)
#define SH_CLK_DIV4_MSK SH_CLK_DIV_MSK(4)
#define SH_CLK_DIV6_MSK SH_CLK_DIV_MSK(6)
struct clk {
struct list_head node;
struct clk *parent;
struct clk **parent_table; /* list of parents to */
unsigned short parent_num; /* choose between */
unsigned char src_shift; /* source clock field in the */
unsigned char src_width; /* configuration register */
struct sh_clk_ops *ops;
struct list_head children;
struct list_head sibling; /* node for children */
int usecount;
unsigned long rate;
unsigned long flags;
void __iomem *enable_reg;
void __iomem *status_reg;
unsigned int enable_bit;
void __iomem *mapped_reg;
unsigned int div_mask;
unsigned long arch_flags;
void *priv;
struct clk_mapping *mapping;
struct cpufreq_frequency_table *freq_table;
unsigned int nr_freqs;
};
#define CLK_ENABLE_ON_INIT BIT(0)
#define CLK_ENABLE_REG_32BIT BIT(1) /* default access size */
#define CLK_ENABLE_REG_16BIT BIT(2)
#define CLK_ENABLE_REG_8BIT BIT(3)
#define CLK_MASK_DIV_ON_DISABLE BIT(4)
#define CLK_ENABLE_REG_MASK (CLK_ENABLE_REG_32BIT | \
CLK_ENABLE_REG_16BIT | \
CLK_ENABLE_REG_8BIT)
/* drivers/sh/clk.c */
unsigned long followparent_recalc(struct clk *);
void recalculate_root_clocks(void);
void propagate_rate(struct clk *);
int clk_reparent(struct clk *child, struct clk *parent);
int clk_register(struct clk *);
void clk_unregister(struct clk *);
void clk_enable_init_clocks(void);
struct clk_div_mult_table {
unsigned int *divisors;
unsigned int nr_divisors;
unsigned int *multipliers;
unsigned int nr_multipliers;
};
struct cpufreq_frequency_table;
void clk_rate_table_build(struct clk *clk,
struct cpufreq_frequency_table *freq_table,
int nr_freqs,
struct clk_div_mult_table *src_table,
unsigned long *bitmap);
long clk_rate_table_round(struct clk *clk,
struct cpufreq_frequency_table *freq_table,
unsigned long rate);
int clk_rate_table_find(struct clk *clk,
struct cpufreq_frequency_table *freq_table,
unsigned long rate);
long clk_rate_div_range_round(struct clk *clk, unsigned int div_min,
unsigned int div_max, unsigned long rate);
long clk_rate_mult_range_round(struct clk *clk, unsigned int mult_min,
unsigned int mult_max, unsigned long rate);
#define SH_CLK_MSTP(_parent, _enable_reg, _enable_bit, _status_reg, _flags) \
{ \
.parent = _parent, \
.enable_reg = (void __iomem *)_enable_reg, \
.enable_bit = _enable_bit, \
.status_reg = _status_reg, \
.flags = _flags, \
}
#define SH_CLK_MSTP32(_p, _r, _b, _f) \
SH_CLK_MSTP(_p, _r, _b, 0, _f | CLK_ENABLE_REG_32BIT)
#define SH_CLK_MSTP32_STS(_p, _r, _b, _s, _f) \
SH_CLK_MSTP(_p, _r, _b, _s, _f | CLK_ENABLE_REG_32BIT)
#define SH_CLK_MSTP16(_p, _r, _b, _f) \
SH_CLK_MSTP(_p, _r, _b, 0, _f | CLK_ENABLE_REG_16BIT)
#define SH_CLK_MSTP8(_p, _r, _b, _f) \
SH_CLK_MSTP(_p, _r, _b, 0, _f | CLK_ENABLE_REG_8BIT)
int sh_clk_mstp_register(struct clk *clks, int nr);
/*
* MSTP registration never really cared about access size, despite the
* original enable/disable pairs assuming a 32-bit access. Clocks are
* responsible for defining their access sizes either directly or via the
* clock definition wrappers.
*/
static inline int __deprecated sh_clk_mstp32_register(struct clk *clks, int nr)
{
return sh_clk_mstp_register(clks, nr);
}
#define SH_CLK_DIV4(_parent, _reg, _shift, _div_bitmap, _flags) \
{ \
.parent = _parent, \
.enable_reg = (void __iomem *)_reg, \
.enable_bit = _shift, \
.arch_flags = _div_bitmap, \
.div_mask = SH_CLK_DIV4_MSK, \
.flags = _flags, \
}
struct clk_div_table {
struct clk_div_mult_table *div_mult_table;
void (*kick)(struct clk *clk);
};
#define clk_div4_table clk_div_table
int sh_clk_div4_register(struct clk *clks, int nr,
struct clk_div4_table *table);
int sh_clk_div4_enable_register(struct clk *clks, int nr,
struct clk_div4_table *table);
int sh_clk_div4_reparent_register(struct clk *clks, int nr,
struct clk_div4_table *table);
#define SH_CLK_DIV6_EXT(_reg, _flags, _parents, \
_num_parents, _src_shift, _src_width) \
{ \
.enable_reg = (void __iomem *)_reg, \
.enable_bit = 0, /* unused */ \
.flags = _flags | CLK_MASK_DIV_ON_DISABLE, \
.div_mask = SH_CLK_DIV6_MSK, \
.parent_table = _parents, \
.parent_num = _num_parents, \
.src_shift = _src_shift, \
.src_width = _src_width, \
}
#define SH_CLK_DIV6(_parent, _reg, _flags) \
{ \
.parent = _parent, \
.enable_reg = (void __iomem *)_reg, \
.enable_bit = 0, /* unused */ \
.div_mask = SH_CLK_DIV6_MSK, \
.flags = _flags | CLK_MASK_DIV_ON_DISABLE, \
}
int sh_clk_div6_register(struct clk *clks, int nr);
int sh_clk_div6_reparent_register(struct clk *clks, int nr);
#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
#define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk }
#define CLKDEV_ICK_ID(_cid, _did, _clk) { .con_id = _cid, .dev_id = _did, .clk = _clk }
/* .enable_reg will be updated to .mapping on sh_clk_fsidiv_register() */
#define SH_CLK_FSIDIV(_reg, _parent) \
{ \
.enable_reg = (void __iomem *)_reg, \
.parent = _parent, \
}
int sh_clk_fsidiv_register(struct clk *clks, int nr);
#endif /* __SH_CLOCK_H */