/* SPDX-License-Identifier: GPL-2.0-only */
|
/*
|
* V4L2 clock service
|
*
|
* Copyright (C) 2012-2013, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
|
*
|
* ATTENTION: This is a temporary API and it shall be replaced by the generic
|
* clock API, when the latter becomes widely available.
|
*/
|
|
#ifndef MEDIA_V4L2_CLK_H
|
#define MEDIA_V4L2_CLK_H
|
|
#include <linux/atomic.h>
|
#include <linux/export.h>
|
#include <linux/list.h>
|
#include <linux/mutex.h>
|
|
struct module;
|
struct device;
|
|
struct clk;
|
struct v4l2_clk {
|
struct list_head list;
|
const struct v4l2_clk_ops *ops;
|
const char *dev_id;
|
int enable;
|
struct mutex lock; /* Protect the enable count */
|
atomic_t use_count;
|
struct clk *clk;
|
void *priv;
|
};
|
|
struct v4l2_clk_ops {
|
struct module *owner;
|
int (*enable)(struct v4l2_clk *clk);
|
void (*disable)(struct v4l2_clk *clk);
|
unsigned long (*get_rate)(struct v4l2_clk *clk);
|
int (*set_rate)(struct v4l2_clk *clk, unsigned long);
|
};
|
|
struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops,
|
const char *dev_name,
|
void *priv);
|
void v4l2_clk_unregister(struct v4l2_clk *clk);
|
struct v4l2_clk *v4l2_clk_get(struct device *dev, const char *id);
|
void v4l2_clk_put(struct v4l2_clk *clk);
|
int v4l2_clk_enable(struct v4l2_clk *clk);
|
void v4l2_clk_disable(struct v4l2_clk *clk);
|
unsigned long v4l2_clk_get_rate(struct v4l2_clk *clk);
|
int v4l2_clk_set_rate(struct v4l2_clk *clk, unsigned long rate);
|
|
struct module;
|
|
struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id,
|
unsigned long rate, struct module *owner);
|
void v4l2_clk_unregister_fixed(struct v4l2_clk *clk);
|
|
static inline struct v4l2_clk *v4l2_clk_register_fixed(const char *dev_id,
|
unsigned long rate)
|
{
|
return __v4l2_clk_register_fixed(dev_id, rate, THIS_MODULE);
|
}
|
|
#define V4L2_CLK_NAME_SIZE 64
|
|
#define v4l2_clk_name_i2c(name, size, adap, client) snprintf(name, size, \
|
"%d-%04x", adap, client)
|
|
#define v4l2_clk_name_of(name, size, node) snprintf(name, size, \
|
"of-%pOF", node)
|
|
#endif
|
