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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2023-02-25 GuEe-GUI the first version
*/
#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>
#define DBG_TAG "thermal.cool.dvfs"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
struct dvfs_cool
{
struct rt_thermal_cooling_device parent;
struct rt_dvfs_scaling *dvfs;
};
#define raw_to_dvfs_cool(raw) rt_container_of(raw, struct dvfs_cool, parent)
static rt_err_t dvfs_cool_get_max_level(struct rt_thermal_cooling_device *cdev,
rt_ubase_t *out_level)
{
struct dvfs_cool *dvfs_cool = raw_to_dvfs_cool(cdev);
struct rt_dvfs_scaling *dvfs = dvfs_cool->dvfs;
rt_dvfs_scaling_enter(dvfs);
if (dvfs->opp_table->opp_nodes.next)
{
*out_level = rt_list_len(&dvfs->opp_table->opp_nodes);
if (*out_level > 0)
{
(*out_level)--;
}
}
else
{
*out_level = 0;
}
rt_dvfs_scaling_leave(dvfs);
return RT_EOK;
}
static rt_err_t dvfs_cool_get_cur_level(struct rt_thermal_cooling_device *cdev,
rt_ubase_t *out_level)
{
struct rt_dvfs_opp *opp;
struct dvfs_cool *dvfs_cool = raw_to_dvfs_cool(cdev);
struct rt_dvfs_scaling *dvfs = dvfs_cool->dvfs;
rt_dvfs_scaling_enter(dvfs);
*out_level = 0;
rt_list_for_each_entry(opp, &dvfs->opp_table->opp_nodes, list)
{
if (opp == dvfs->opp_table->current_opp)
{
break;
}
(*out_level)++;
}
rt_dvfs_scaling_leave(dvfs);
return RT_EOK;
}
static rt_err_t dvfs_cool_set_cur_level(struct rt_thermal_cooling_device *cdev,
rt_ubase_t level)
{
struct rt_dvfs_opp *opp, *target_opp = RT_NULL;
struct dvfs_cool *dvfs_cool = raw_to_dvfs_cool(cdev);
struct rt_dvfs_scaling *dvfs = dvfs_cool->dvfs;
rt_dvfs_scaling_enter(dvfs);
rt_list_for_each_entry(opp, &dvfs->opp_table->opp_nodes, list)
{
if (!level)
{
target_opp = opp;
break;
}
--level;
}
rt_dvfs_scaling_leave(dvfs);
if (target_opp)
{
return rt_dvfs_scaling_apply_opp(dvfs, target_opp);
}
return -RT_EINVAL;
}
const static struct rt_thermal_cooling_device_ops dvfs_cool_ops =
{
.get_max_level = dvfs_cool_get_max_level,
.get_cur_level = dvfs_cool_get_cur_level,
.set_cur_level = dvfs_cool_set_cur_level,
};
static rt_err_t dvfs_cool_probe(struct rt_platform_device *pdev)
{
rt_err_t err;
struct dvfs_cool *dvfs_cool;
struct rt_device *dev = &pdev->parent;
if (!pdev->priv)
{
return -RT_EINVAL;
}
if (!(dvfs_cool = rt_calloc(1, sizeof(*dvfs_cool))))
{
return -RT_ENOMEM;
}
dvfs_cool->dvfs = pdev->priv;
rt_dm_dev_set_name(&dvfs_cool->parent.parent, "%s-cool",
rt_dm_dev_get_name(dvfs_cool->dvfs->dev));
dvfs_cool->parent.parent.ofw_node = dev->ofw_node;
dvfs_cool->parent.ops = &dvfs_cool_ops;
if ((err = rt_thermal_cooling_device_register(&dvfs_cool->parent)))
{
goto _fail;
}
dev->user_data = dvfs_cool;
return RT_EOK;
_fail:
rt_free(dvfs_cool);
return err;
}
static rt_err_t dvfs_cool_remove(struct rt_platform_device *pdev)
{
struct dvfs_cool *dvfs_cool = pdev->parent.user_data;
rt_thermal_cooling_device_unregister(&dvfs_cool->parent);
rt_free(dvfs_cool);
return RT_EOK;
}
static struct rt_platform_driver dvfs_cool_driver =
{
.name = "dvfs-cool",
.probe = dvfs_cool_probe,
.remove = dvfs_cool_remove,
};
RT_PLATFORM_DRIVER_EXPORT(dvfs_cool_driver);
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