mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 21:54:06 +08:00
03ca370fbf
The patch enables to register notifier_block for an OPP-device in order to get notified for any changes in the availability of OPPs of the device. For example, if a new OPP is inserted or enable/disable status of an OPP is changed, the notifier is executed. This enables the usage of opp_add, opp_enable, and opp_disable to directly take effect with any connected entities such as cpufreq or devfreq. Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Mike Turquette <mturquette@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
126 lines
2.7 KiB
C
126 lines
2.7 KiB
C
/*
|
|
* Generic OPP Interface
|
|
*
|
|
* Copyright (C) 2009-2010 Texas Instruments Incorporated.
|
|
* Nishanth Menon
|
|
* Romit Dasgupta
|
|
* 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 __LINUX_OPP_H__
|
|
#define __LINUX_OPP_H__
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/cpufreq.h>
|
|
#include <linux/notifier.h>
|
|
|
|
struct opp;
|
|
|
|
enum opp_event {
|
|
OPP_EVENT_ADD, OPP_EVENT_ENABLE, OPP_EVENT_DISABLE,
|
|
};
|
|
|
|
#if defined(CONFIG_PM_OPP)
|
|
|
|
unsigned long opp_get_voltage(struct opp *opp);
|
|
|
|
unsigned long opp_get_freq(struct opp *opp);
|
|
|
|
int opp_get_opp_count(struct device *dev);
|
|
|
|
struct opp *opp_find_freq_exact(struct device *dev, unsigned long freq,
|
|
bool available);
|
|
|
|
struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq);
|
|
|
|
struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq);
|
|
|
|
int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt);
|
|
|
|
int opp_enable(struct device *dev, unsigned long freq);
|
|
|
|
int opp_disable(struct device *dev, unsigned long freq);
|
|
|
|
struct srcu_notifier_head *opp_get_notifier(struct device *dev);
|
|
|
|
#else
|
|
static inline unsigned long opp_get_voltage(struct opp *opp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned long opp_get_freq(struct opp *opp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int opp_get_opp_count(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline struct opp *opp_find_freq_exact(struct device *dev,
|
|
unsigned long freq, bool available)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
static inline struct opp *opp_find_freq_floor(struct device *dev,
|
|
unsigned long *freq)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
static inline struct opp *opp_find_freq_ceil(struct device *dev,
|
|
unsigned long *freq)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
static inline int opp_add(struct device *dev, unsigned long freq,
|
|
unsigned long u_volt)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int opp_enable(struct device *dev, unsigned long freq)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int opp_disable(struct device *dev, unsigned long freq)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
struct srcu_notifier_head *opp_get_notifier(struct device *dev)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
#endif /* CONFIG_PM */
|
|
|
|
#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP)
|
|
int opp_init_cpufreq_table(struct device *dev,
|
|
struct cpufreq_frequency_table **table);
|
|
void opp_free_cpufreq_table(struct device *dev,
|
|
struct cpufreq_frequency_table **table);
|
|
#else
|
|
static inline int opp_init_cpufreq_table(struct device *dev,
|
|
struct cpufreq_frequency_table **table)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline
|
|
void opp_free_cpufreq_table(struct device *dev,
|
|
struct cpufreq_frequency_table **table)
|
|
{
|
|
}
|
|
#endif /* CONFIG_CPU_FREQ */
|
|
|
|
#endif /* __LINUX_OPP_H__ */
|