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/*
* OMAP OPP Interface
*
* Copyright (C) 2009-2010 Texas Instruments Incorporated.
* Nishanth Menon
* Romit Dasgupta <romit@ti.com>
* Copyright (C) 2009 Deep Root Systems, LLC.
* Kevin Hilman
*
* 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 __ASM_ARM_OMAP_OPP_H
#define __ASM_ARM_OMAP_OPP_H
#include <linux/err.h>
#include <linux/cpufreq.h>
#include <linux/clk.h>
#include <plat/common.h>
#include <plat/voltage.h>
/**
* struct omap_opp_def - OMAP OPP Definition
* @enabled: True/false - is this OPP enabled/disabled by default
* @freq: Frequency in hertz corresponding to this OPP
* @u_volt: Nominal voltage in microvolts corresponding to this OPP
*
* OMAP SOCs have a standard set of tuples consisting of frequency and voltage
* pairs that the device will support per voltage domain. This is called
* Operating Points or OPP. The actual definitions of OMAP Operating Points
* varies over silicon within the same family of devices. For a specific
* domain, you can have a set of {frequency, voltage} pairs and this is denoted
* by an array of omap_opp_def. As the kernel boots and more information is
* available, a set of these are activated based on the precise nature of
* device the kernel boots up on. It is interesting to remember that each IP
* which belongs to a voltage domain may define their own set of OPPs on top
* of this - but this is handled by the appropriate driver.
*/
struct omap_opp_def {
char *hwmod_name;
unsigned long freq;
unsigned long u_volt;
bool enabled;
};
/*
* Initialization wrapper used to define an OPP.
* To point at the end of a terminator of a list of OPPs,
* use OMAP_OPP_DEF(0, 0, 0)
*/
#define OMAP_OPP_DEF(_hwmod_name, _enabled, _freq, _uv) \
{ \
.hwmod_name = _hwmod_name, \
.enabled = _enabled, \
.freq = _freq, \
.u_volt = _uv, \
}
struct omap_opp;
#ifdef CONFIG_PM
unsigned long opp_get_voltage(const struct omap_opp *opp);
unsigned long opp_get_freq(const struct omap_opp *opp);
int opp_get_opp_count(struct device *dev);
struct omap_opp *opp_find_freq_exact(struct device *dev,
unsigned long freq, bool enabled);
struct omap_opp *opp_find_freq_floor(struct device *dev, unsigned long *freq);
struct omap_opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq);
struct omap_opp *opp_find_voltage(struct device *dev, unsigned long volt,
unsigned long hack_freq);
int opp_set_rate(struct device *dev, unsigned long freq);
unsigned long opp_get_rate(struct device *dev);
void opp_populate_rate_fns(struct device *dev,
int (*set_rate)(struct device *dev, unsigned long rate),
unsigned long (*get_rate) (struct device *dev));
int opp_add(const struct omap_opp_def *opp_def);
int opp_enable(struct omap_opp *opp);
int opp_disable(struct omap_opp *opp);
struct omap_opp *__deprecated opp_find_by_opp_id(struct device *dev,
u8 opp_id);
u8 __deprecated opp_get_opp_id(struct omap_opp *opp);
void opp_init_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table);
struct device **opp_init_voltage_params(struct voltagedomain *voltdm,
int *dev_count);
#else
static inline unsigned long opp_get_voltage(const struct omap_opp *opp)
{
return 0;
}
static inline unsigned long opp_get_freq(const struct omap_opp *opp)
{
return 0;
}
static inline int opp_get_opp_count(struct device *dev)
{
return 0;
}
static inline struct omap_opp *opp_find_freq_exact(struct device *dev,
unsigned long freq,
bool enabled)
{
return ERR_PTR(-EINVAL);
}
static inline struct omap_opp *opp_find_freq_floor(struct device *dev,
unsigned long *freq)
{
return ERR_PTR(-EINVAL);
}
static inline struct omap_opp *opp_find_freq_ceil(struct device *dev,
unsigned long *freq)
{
return ERR_PTR(-EINVAL);
}
static inline struct omap_opp *opp_find_voltage(struct device *dev,
unsigned long volt,
unsigned long hack_freq)
{
return ERR_PTR(-EINVAL);
}
static inline int opp_set_rate(struct device *dev, unsigned long freq)
{
return -EINVAL;
}
static inline unsigned long opp_get_rate(struct device *dev)
{
return 0;
}
static inline void opp_populate_rate_fns(struct device *dev,
int (*set_rate)(struct device *dev, unsigned long rate),
unsigned long (*get_rate) (struct device *dev))
{
return;
}
static inline struct omap_opp *opp_add(struct omap_opp *oppl,
const struct omap_opp_def *opp_def)
{
return ERR_PTR(-EINVAL);
}
static inline int opp_enable(struct omap_opp *opp)
{
return 0;
}
static inline int opp_disable(struct omap_opp *opp)
{
return 0;
}
static inline struct omap_opp *__deprecated
opp_find_by_opp_id(struct device *dev, u8 opp_id)
{
return ERR_PTR(-EINVAL);
}
static inline u8 __deprecated opp_get_opp_id(struct omap_opp *opp)
{
return 0;
}
static inline
void opp_init_cpufreq_table(struct device *dev,
struct cpufreq_frequency_table **table)
{
}
static inline struct device **opp_init_voltage_params(
struct voltagedomain *voltdm, int *dev_count)
{
return ERR_PTR(-EINVAL);
}
#endif /* CONFIG_PM */
#endif /* __ASM_ARM_OMAP_OPP_H */
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