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/*
* Generic OPP Domain Private
*
* Copyright (C) 2016 Texas Instruments Incorporated.
* Dave Gerlach
*
* 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 __DRIVER_OPP_DOMAIN_H__
#define __DRIVER_OPP_DOMAIN_H__
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/pm_opp.h>
struct pm_opp_domain_desc;
/**
* struct pm_opp_domain_dev - internal representation of opp domain devices
* @dev: voltage domain device
* @node: list to remaining voltage domain devices
* @node: mutex to control data structure modifications and serialize ops
*/
struct pm_opp_domain_dev {
const struct pm_opp_domain_desc *desc;
struct device *dev;
struct list_head node;
};
/**
* struct pm_opp_domain - Structure to maintain opp domain info
* @dev: device for which we scale clk and supply
* @clk: clk which we must scale
* @reg: regulator, if any, which is used for scaling voltage
* @data: opp_domain driver specific data
*/
struct pm_opp_domain {
struct device *dev;
struct clk *clk;
struct regulator *reg;
struct pm_opp_domain_dev *oppdm_dev;
void *data;
};
#if defined(CONFIG_PM_OPP)
int dev_pm_opp_domain_set_rate(struct pm_opp_domain *pod,
unsigned long target_freq);
struct pm_opp_domain *dev_pm_opp_domain_get(struct device *dev);
int dev_pm_opp_domain_put(struct pm_opp_domain *pod);
int dev_pm_opp_domain_get_supply(struct pm_opp_domain *pod,
const char *supply);
void dev_pm_opp_domain_put_supply(struct pm_opp_domain *pod);
int dev_pm_opp_domain_get_latency(struct pm_opp_domain *pod, int old_uV,
int old_uV_min, int old_uV_max, int new_uV,
int new_uV_min, int new_uV_max);
bool dev_pm_opp_domain_opp_supported_by_supply(struct pm_opp_domain *pod,
unsigned long uV_min,
unsigned long uV_max);
#else
static inline int dev_pm_opp_domain_set_rate(struct pm_opp_domain *pod,
unsigned long target_freq)
{
return -ENODEV;
}
static inline struct pm_opp_domain *dev_pm_opp_domain_get(struct device *dev,
const char *supply)
{
return NULL;
}
static inline void dev_pm_opp_domain_put(struct pm_opp_domain *pod)
{
}
static inline int dev_pm_opp_domain_get_supply(struct pm_opp_domain *pod,
const char *supply)
{
return -ENODEV;
}
static inline void dev_pm_opp_domain_put_supply(struct pm_opp_domain *pod)
{
}
static inline int dev_pm_opp_domain_get_latency(struct pm_opp_domain *pod,
int old_uV, int old_uV_min,
int old_uV_max, int new_uV,
int new_uV_min, int new_uV_max)
{
return -ENODEV;
}
static inline
bool dev_pm_opp_domain_opp_supported_by_supply(struct pm_opp_domain *pod,
unsigned long uV_min,
unsigned long uV_max)
{
return false;
}
#endif /* CONFIG_PM_OPP */
#endif /* __DRIVER_OPP_DOMAIN_H__ */
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