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/*
* Google LWIS Clock Interface
*
* Copyright (c) 2018 Google, LLC
*
* 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 LWIS_CLOCK_H_
#define LWIS_CLOCK_H_
#include <linux/clk.h>
#include <linux/device.h>
/*
* LWIS Clock Structures
*/
struct lwis_clock {
struct clk *clk;
char *name;
uint32_t rate;
};
struct lwis_clock_list {
struct lwis_clock *clk;
int count;
};
/*
* LWIS Clock Interface Functions
*/
/*
* lwis_clock_list_alloc: Allocate an instance of the lwis_clock_list
* and initialize the data structures according to the number of clocks
* specified.
* NOTE: This does not register the clock structs.
*/
struct lwis_clock_list *lwis_clock_list_alloc(int num_clks);
/*
* lwis_clock_list_free: Deallocate the lwis_clock_list structure.
*/
void lwis_clock_list_free(struct lwis_clock_list *list);
/*
* lwis_clock_get: Register the clock by name and store its assigned
* clock rate.
* Returns: index number (>= 0) if success, -ve if error
*/
int lwis_clock_get(struct lwis_clock_list *list, char *name, struct device *dev, uint32_t rate);
/*
* lwis_clock_put_by_idx: Unregister the clock by index.
* Returns: 0 if success, -ve if error
*/
int lwis_clock_put_by_idx(struct lwis_clock_list *list, int index, struct device *dev);
/*
* lwis_clock_put_by_name: Unregister the clock by name.
* Returns: 0 if success, -ve if error
*/
int lwis_clock_put_by_name(struct lwis_clock_list *list, char *name, struct device *dev);
/*
* lwis_clock_enable_by_idx: Enable clock by index.
* Returns: 0 if success, -ve if error
*/
int lwis_clock_enable_by_idx(struct lwis_clock_list *list, int index);
/*
* lwis_clock_enable_by_name: Enable clock by name.
* Returns: 0 if success, -ve if error
*/
int lwis_clock_enable_by_name(struct lwis_clock_list *list, char *name);
/*
* lwis_clock_enable_all: Enable all clocks.
* Returns: 0 if success, -ve if error
*/
int lwis_clock_enable_all(struct lwis_clock_list *list);
/*
* lwis_clock_disable_by_idx: Disable clock by index.
*/
void lwis_clock_disable_by_idx(struct lwis_clock_list *list, int index);
/*
* lwis_clock_disable_by_name: Disable clock by name.
*/
void lwis_clock_disable_by_name(struct lwis_clock_list *list, char *name);
/*
* lwis_clock_disable_all: Disable all clocks.
*/
void lwis_clock_disable_all(struct lwis_clock_list *list);
/*
* lwis_clock_print: Debug function to print all the clocks in the
* supplied list.
*/
void lwis_clock_print(struct lwis_clock_list *list);
#endif /* LWIS_CLOCK_H_ */
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