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/*
* Copyright (c) 2014-2016, 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 _GOVERNOR_BW_HWMON_H
#define _GOVERNOR_BW_HWMON_H
#include <linux/kernel.h>
#include <linux/devfreq.h>
/**
* struct bw_hwmon - dev BW HW monitor info
* @start_hwmon: Start the HW monitoring of the dev BW
* @stop_hwmon: Stop the HW monitoring of dev BW
* @set_thres: Set the count threshold to generate an IRQ
* @get_bytes_and_clear: Get the bytes transferred since the last call
* and reset the counter to start over.
* @set_throttle_adj: Set throttle adjust field to the given value
* @get_throttle_adj: Get the value written to throttle adjust field
* @dev: Pointer to device that this HW monitor can
* monitor.
* @of_node: OF node of device that this HW monitor can
* monitor.
* @gov: devfreq_governor struct that should be used
* when registering this HW monitor with devfreq.
* Only the name field is expected to be
* initialized.
* @df: Devfreq node that this HW monitor is being
* used for. NULL when not actively in use and
* non-NULL when in use.
*
* One of dev, of_node or governor_name needs to be specified for a
* successful registration.
*
*/
struct bw_hwmon {
int (*start_hwmon)(struct bw_hwmon *hw, unsigned long mbps);
void (*stop_hwmon)(struct bw_hwmon *hw);
int (*suspend_hwmon)(struct bw_hwmon *hw);
int (*resume_hwmon)(struct bw_hwmon *hw);
unsigned long (*set_thres)(struct bw_hwmon *hw, unsigned long bytes);
unsigned long (*set_hw_events)(struct bw_hwmon *hw,
unsigned int sample_ms);
unsigned long (*get_bytes_and_clear)(struct bw_hwmon *hw);
int (*set_throttle_adj)(struct bw_hwmon *hw, uint adj);
u32 (*get_throttle_adj)(struct bw_hwmon *hw);
struct device *dev;
struct device_node *of_node;
struct devfreq_governor *gov;
unsigned long up_wake_mbps;
unsigned long undo_over_req_mbps;
unsigned long down_wake_mbps;
unsigned int down_cnt;
struct devfreq *df;
};
#ifdef CONFIG_DEVFREQ_GOV_QCOM_BW_HWMON
int register_bw_hwmon(struct device *dev, struct bw_hwmon *hwmon);
int update_bw_hwmon(struct bw_hwmon *hwmon);
int bw_hwmon_sample_end(struct bw_hwmon *hwmon);
#else
static inline int register_bw_hwmon(struct device *dev,
struct bw_hwmon *hwmon)
{
return 0;
}
static inline int update_bw_hwmon(struct bw_hwmon *hwmon)
{
return 0;
}
static inline int bw_hwmon_sample_end(struct bw_hwmon *hwmon)
{
return 0;
}
#endif
#endif /* _GOVERNOR_BW_HWMON_H */