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/*
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef __ARCH_ARM_MSM_CLOCK_CONTROLLER_H
#define __ARCH_ARM_MSM_CLOCK_CONTROLLER_H
#include <linux/list.h>
#include <linux/clkdev.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#define dt_err(np, fmt, ...) \
pr_err("%s: " fmt, np->name, ##__VA_ARGS__)
#define dt_prop_err(np, str, fmt, ...) \
dt_err(np, "%s: " fmt, str, ##__VA_ARGS__)
/**
* struct msmclk_parser
* @compatible
* matches compatible property from devicetree
* @parsedt
* constructs & returns an instance of the appropriate obj based on
* the data from devicetree.
*/
struct msmclk_parser {
struct list_head list;
char *compatible;
void * (*parsedt)(struct device *dev, struct device_node *of);
};
#define MSMCLK_PARSER(fn, str, id) \
static struct msmclk_parser _msmclk_##fn##id = { \
.list = LIST_HEAD_INIT(_msmclk_##fn##id.list), \
.compatible = str, \
.parsedt = fn, \
}; \
static int __init _msmclk_init_##fn##id(void) \
{ \
msmclk_parser_register(&_msmclk_##fn##id); \
return 0; \
} \
early_initcall(_msmclk_init_##fn##id)
/*
* struct msmclk_data
* @base
* ioremapped region for sub_devices
* @list
* tracks all registered driver instances
* @htable
* tracks all registered child clocks
* @clk_tbl
* array of clk_lookup to be registered with the clock framework
*/
#define HASHTABLE_SIZE 200
struct msmclk_data {
void __iomem *base;
struct device *dev;
struct list_head list;
struct hlist_head htable[HASHTABLE_SIZE];
struct clk_lookup *clk_tbl;
int clk_tbl_size;
int max_clk_tbl_size;
};
#if defined(CONFIG_MSM_CLK_CONTROLLER_V2)
/* Utility functions */
int of_property_count_phandles(struct device_node *np, char *propname);
int of_property_read_phandle_index(struct device_node *np, char *propname,
int index, phandle *p);
void *msmclk_generic_clk_init(struct device *dev, struct device_node *np,
struct clk *c);
/*
* msmclk_parser_register
* Registers a parser which will be matched with a node from dt
* according to the compatible string.
*/
void msmclk_parser_register(struct msmclk_parser *);
/*
* msmclk_parse_phandle
* On hashtable miss, the corresponding entry will be retrieved from
* devicetree, and added to the hashtable.
*/
void *msmclk_parse_phandle(struct device *dev, phandle key);
/*
* msmclk_lookup_phandle
* Straightforward hashtable lookup
*/
void *msmclk_lookup_phandle(struct device *dev, phandle key);
int __init msmclk_init(void);
#else
static inline int of_property_count_phandles(struct device_node *np,
char *propname)
{
return 0;
}
static inline int of_property_read_phandle_index(struct device_node *np,
char *propname, int index, phandle *p)
{
return 0;
}
static inline void *msmclk_generic_clk_init(struct device *dev,
struct device_node *np, struct clk *c)
{
return ERR_PTR(-EINVAL);
}
static inline void msmclk_parser_register(struct msmclk_parser *p) {};
static inline void *msmclk_parse_phandle(struct device *dev, phandle key)
{
return ERR_PTR(-EINVAL);
}
static inline void *msmclk_lookup_phandle(struct device *dev, phandle key)
{
return ERR_PTR(-EINVAL);
}
static inline int __init msmclk_init(void)
{
return 0;
}
#endif /* CONFIG_MSM_CLK_CONTROLLER_V2 */
#endif /* __ARCH_ARM_MSM_CLOCK_CONTROLLER_H */
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