Since 2011 barebox' of_device_id struct uses unsigned long type for data field: struct of_device_id { char *compatible; unsigned long data; }; Almost always struct of_device_id.data field are used as pointer and need 'unsigned long' casting. E.g. see 'git grep -A 4 of_device_id drivers/' output: drivers/ata/sata-imx.c:static __maybe_unused struct of_device_id imx_sata_dt_ids[] = { drivers/ata/sata-imx.c- { drivers/ata/sata-imx.c- .compatible = "fsl,imx6q-ahci", drivers/ata/sata-imx.c- .data = (unsigned long)&data_imx6, drivers/ata/sata-imx.c- }, { Here is of_device_id struct in linux kernel v4.0: struct of_device_id { char name[32]; char type[32]; char compatible[128]; const void *data; }; Changing of_device_id.data type to 'const void *data' will increase barebox' linux kernel compatibility and decrease number of 'unsigned long' casts. Part of the patch was done using the 'coccinelle' tool with the following semantic patch: @rule1@ identifier dev; identifier type; identifier func; @@ func(...) { <... - dev_get_drvdata(dev, (unsigned long *)&type) + dev_get_drvdata(dev, (const void **)&type) ...> } @rule2@ identifier dev; identifier type; identifier func; identifier data; @@ func(...) { <... - dev_get_drvdata(dev, (unsigned long *)&type->data) + dev_get_drvdata(dev, (const void **)&type->data) ...> } Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
366 lines
10 KiB
C
366 lines
10 KiB
C
/*
|
|
* linux/include/linux/clk.h
|
|
*
|
|
* Copyright (C) 2004 ARM Limited.
|
|
* Written by Deep Blue Solutions Limited.
|
|
*
|
|
* 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.
|
|
*/
|
|
#ifndef __LINUX_CLK_H
|
|
#define __LINUX_CLK_H
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/stringify.h>
|
|
|
|
struct device_d;
|
|
|
|
/*
|
|
* The base API.
|
|
*/
|
|
|
|
/*
|
|
* struct clk - an machine class defined object / cookie.
|
|
*/
|
|
struct clk;
|
|
|
|
#ifdef CONFIG_HAVE_CLK
|
|
|
|
/**
|
|
* clk_get - lookup and obtain a reference to a clock producer.
|
|
* @dev: device for clock "consumer"
|
|
* @id: clock comsumer ID
|
|
*
|
|
* Returns a struct clk corresponding to the clock producer, or
|
|
* valid IS_ERR() condition containing errno. The implementation
|
|
* uses @dev and @id to determine the clock consumer, and thereby
|
|
* the clock producer. (IOW, @id may be identical strings, but
|
|
* clk_get may return different clock producers depending on @dev.)
|
|
*
|
|
* Drivers must assume that the clock source is not enabled.
|
|
*
|
|
* clk_get should not be called from within interrupt context.
|
|
*/
|
|
struct clk *clk_get(struct device_d *dev, const char *id);
|
|
|
|
/**
|
|
* clk_enable - inform the system when the clock source should be running.
|
|
* @clk: clock source
|
|
*
|
|
* If the clock can not be enabled/disabled, this should return success.
|
|
*
|
|
* Returns success (0) or negative errno.
|
|
*/
|
|
int clk_enable(struct clk *clk);
|
|
|
|
/**
|
|
* clk_disable - inform the system when the clock source is no longer required.
|
|
* @clk: clock source
|
|
*
|
|
* Inform the system that a clock source is no longer required by
|
|
* a driver and may be shut down.
|
|
*
|
|
* Implementation detail: if the clock source is shared between
|
|
* multiple drivers, clk_enable() calls must be balanced by the
|
|
* same number of clk_disable() calls for the clock source to be
|
|
* disabled.
|
|
*/
|
|
void clk_disable(struct clk *clk);
|
|
|
|
/**
|
|
* clk_get_rate - obtain the current clock rate (in Hz) for a clock source.
|
|
* This is only valid once the clock source has been enabled.
|
|
* @clk: clock source
|
|
*/
|
|
unsigned long clk_get_rate(struct clk *clk);
|
|
|
|
/**
|
|
* clk_put - "free" the clock source
|
|
* @clk: clock source
|
|
*
|
|
* Note: drivers must ensure that all clk_enable calls made on this
|
|
* clock source are balanced by clk_disable calls prior to calling
|
|
* this function.
|
|
*
|
|
* clk_put should not be called from within interrupt context.
|
|
*/
|
|
void clk_put(struct clk *clk);
|
|
|
|
|
|
/*
|
|
* The remaining APIs are optional for machine class support.
|
|
*/
|
|
|
|
|
|
/**
|
|
* clk_round_rate - adjust a rate to the exact rate a clock can provide
|
|
* @clk: clock source
|
|
* @rate: desired clock rate in Hz
|
|
*
|
|
* Returns rounded clock rate in Hz, or negative errno.
|
|
*/
|
|
long clk_round_rate(struct clk *clk, unsigned long rate);
|
|
|
|
/**
|
|
* clk_set_rate - set the clock rate for a clock source
|
|
* @clk: clock source
|
|
* @rate: desired clock rate in Hz
|
|
*
|
|
* Returns success (0) or negative errno.
|
|
*/
|
|
int clk_set_rate(struct clk *clk, unsigned long rate);
|
|
|
|
/**
|
|
* clk_set_parent - set the parent clock source for this clock
|
|
* @clk: clock source
|
|
* @parent: parent clock source
|
|
*
|
|
* Returns success (0) or negative errno.
|
|
*/
|
|
int clk_set_parent(struct clk *clk, struct clk *parent);
|
|
|
|
/**
|
|
* clk_get_parent - get the parent clock source for this clock
|
|
* @clk: clock source
|
|
*
|
|
* Returns struct clk corresponding to parent clock source, or
|
|
* valid IS_ERR() condition containing errno.
|
|
*/
|
|
struct clk *clk_get_parent(struct clk *clk);
|
|
|
|
/**
|
|
* clk_get_sys - get a clock based upon the device name
|
|
* @dev_id: device name
|
|
* @con_id: connection ID
|
|
*
|
|
* Returns a struct clk corresponding to the clock producer, or
|
|
* valid IS_ERR() condition containing errno. The implementation
|
|
* uses @dev_id and @con_id to determine the clock consumer, and
|
|
* thereby the clock producer. In contrast to clk_get() this function
|
|
* takes the device name instead of the device itself for identification.
|
|
*
|
|
* Drivers must assume that the clock source is not enabled.
|
|
*
|
|
* clk_get_sys should not be called from within interrupt context.
|
|
*/
|
|
struct clk *clk_get_sys(const char *dev_id, const char *con_id);
|
|
|
|
/**
|
|
* clk_add_alias - add a new clock alias
|
|
* @alias: name for clock alias
|
|
* @alias_dev_name: device name
|
|
* @id: platform specific clock name
|
|
* @dev: device
|
|
*
|
|
* Allows using generic clock names for drivers by adding a new alias.
|
|
* Assumes clkdev, see clkdev.h for more info.
|
|
*/
|
|
int clk_add_alias(const char *alias, const char *alias_dev_name, char *id,
|
|
struct device_d *dev);
|
|
|
|
#else
|
|
|
|
static inline struct clk *clk_get(struct device_d *dev, const char *id)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static inline int clk_enable(struct clk *clk)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void clk_disable(struct clk *clk)
|
|
{
|
|
}
|
|
|
|
static inline unsigned long clk_get_rate(struct clk *clk)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void clk_put(struct clk *clk)
|
|
{
|
|
}
|
|
|
|
static inline long clk_round_rate(struct clk *clk, unsigned long rate)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int clk_set_rate(struct clk *clk, unsigned long rate)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_COMMON_CLK
|
|
|
|
#define CLK_SET_RATE_PARENT (1 << 0) /* propagate rate change up one level */
|
|
|
|
#define CLK_GATE_INVERTED (1 << 0)
|
|
#define CLK_GATE_HIWORD_MASK (1 << 1)
|
|
|
|
struct clk_ops {
|
|
int (*enable)(struct clk *clk);
|
|
void (*disable)(struct clk *clk);
|
|
int (*is_enabled)(struct clk *clk);
|
|
unsigned long (*recalc_rate)(struct clk *clk,
|
|
unsigned long parent_rate);
|
|
long (*round_rate)(struct clk *clk, unsigned long,
|
|
unsigned long *);
|
|
int (*set_parent)(struct clk *clk, u8 index);
|
|
int (*get_parent)(struct clk *clk);
|
|
int (*set_rate)(struct clk *clk, unsigned long,
|
|
unsigned long);
|
|
};
|
|
|
|
struct clk {
|
|
const struct clk_ops *ops;
|
|
int enable_count;
|
|
struct list_head list;
|
|
const char *name;
|
|
const char **parent_names;
|
|
int num_parents;
|
|
|
|
struct clk **parents;
|
|
unsigned long flags;
|
|
};
|
|
|
|
struct clk_div_table {
|
|
unsigned int val;
|
|
unsigned int div;
|
|
};
|
|
|
|
struct clk *clk_fixed(const char *name, int rate);
|
|
|
|
struct clk_divider {
|
|
struct clk clk;
|
|
u8 shift;
|
|
u8 width;
|
|
void __iomem *reg;
|
|
const char *parent;
|
|
#define CLK_DIVIDER_ONE_BASED (1 << 0)
|
|
unsigned flags;
|
|
const struct clk_div_table *table;
|
|
int max_div_index;
|
|
int table_size;
|
|
};
|
|
|
|
#define CLK_DIVIDER_POWER_OF_TWO (1 << 1)
|
|
#define CLK_DIVIDER_HIWORD_MASK (1 << 3)
|
|
|
|
#define CLK_MUX_HIWORD_MASK (1 << 2)
|
|
|
|
extern struct clk_ops clk_divider_ops;
|
|
|
|
struct clk *clk_divider_alloc(const char *name, const char *parent,
|
|
void __iomem *reg, u8 shift, u8 width, unsigned flags);
|
|
void clk_divider_free(struct clk *clk_divider);
|
|
struct clk *clk_divider(const char *name, const char *parent,
|
|
void __iomem *reg, u8 shift, u8 width, unsigned flags);
|
|
struct clk *clk_divider_one_based(const char *name, const char *parent,
|
|
void __iomem *reg, u8 shift, u8 width, unsigned flags);
|
|
struct clk *clk_divider_table(const char *name,
|
|
const char *parent, void __iomem *reg, u8 shift, u8 width,
|
|
const struct clk_div_table *table, unsigned flags);
|
|
struct clk *clk_fixed_factor(const char *name,
|
|
const char *parent, unsigned int mult, unsigned int div,
|
|
unsigned flags);
|
|
struct clk *clk_fractional_divider_alloc(
|
|
const char *name, const char *parent_name, unsigned long flags,
|
|
void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
|
|
u8 clk_divider_flags);
|
|
struct clk *clk_fractional_divider(
|
|
const char *name, const char *parent_name, unsigned long flags,
|
|
void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
|
|
u8 clk_divider_flags);
|
|
void clk_fractional_divider_free(struct clk *clk_fd);
|
|
|
|
struct clk *clk_mux_alloc(const char *name, void __iomem *reg,
|
|
u8 shift, u8 width, const char **parents, u8 num_parents,
|
|
unsigned flags);
|
|
void clk_mux_free(struct clk *clk_mux);
|
|
struct clk *clk_mux(const char *name, void __iomem *reg,
|
|
u8 shift, u8 width, const char **parents, u8 num_parents,
|
|
unsigned flags);
|
|
|
|
struct clk *clk_gate_alloc(const char *name, const char *parent,
|
|
void __iomem *reg, u8 shift, unsigned flags,
|
|
u8 clk_gate_flags);
|
|
void clk_gate_free(struct clk *clk_gate);
|
|
struct clk *clk_gate(const char *name, const char *parent, void __iomem *reg,
|
|
u8 shift, unsigned flags, u8 clk_gate_flags);
|
|
struct clk *clk_gate_inverted(const char *name, const char *parent, void __iomem *reg,
|
|
u8 shift, unsigned flags);
|
|
int clk_is_enabled(struct clk *clk);
|
|
|
|
int clk_is_enabled_always(struct clk *clk);
|
|
long clk_parent_round_rate(struct clk *clk, unsigned long rate,
|
|
unsigned long *prate);
|
|
int clk_parent_set_rate(struct clk *clk, unsigned long rate,
|
|
unsigned long parent_rate);
|
|
|
|
int clk_register(struct clk *clk);
|
|
|
|
struct clk *clk_lookup(const char *name);
|
|
|
|
void clk_dump(int verbose);
|
|
|
|
struct clk *clk_register_composite(const char *name,
|
|
const char **parent_names, int num_parents,
|
|
struct clk *mux_clk,
|
|
struct clk *rate_clk,
|
|
struct clk *gate_clk,
|
|
unsigned long flags);
|
|
#endif
|
|
|
|
struct device_node;
|
|
struct of_phandle_args;
|
|
|
|
#define CLK_OF_DECLARE(name, compat, fn) \
|
|
const struct of_device_id __clk_of_table_##name \
|
|
__attribute__ ((unused,section (".__clk_of_table_" __stringify(name)))) \
|
|
= { .compatible = compat, .data = fn }
|
|
|
|
#if defined(CONFIG_OFTREE) && defined(CONFIG_COMMON_CLK_OF_PROVIDER)
|
|
int of_clk_add_provider(struct device_node *np,
|
|
struct clk *(*clk_src_get)(struct of_phandle_args *args,
|
|
void *data),
|
|
void *data);
|
|
void of_clk_del_provider(struct device_node *np);
|
|
|
|
typedef int (*of_clk_init_cb_t)(struct device_node *);
|
|
|
|
struct clk_onecell_data {
|
|
struct clk **clks;
|
|
unsigned int clk_num;
|
|
};
|
|
struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data);
|
|
struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec, void *data);
|
|
|
|
struct clk *of_clk_get(struct device_node *np, int index);
|
|
struct clk *of_clk_get_by_name(struct device_node *np, const char *name);
|
|
struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec);
|
|
char *of_clk_get_parent_name(struct device_node *np, unsigned int index);
|
|
int of_clk_init(struct device_node *root, const struct of_device_id *matches);
|
|
#else
|
|
static inline struct clk *of_clk_get(struct device_node *np, int index)
|
|
{
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
static inline struct clk *of_clk_get_by_name(struct device_node *np,
|
|
const char *name)
|
|
{
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
static inline int of_clk_init(struct device_node *root,
|
|
const struct of_device_id *matches)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#endif
|