mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 06:55:13 +08:00
a4ebd42374
The upper-layer devm_thermal_add_hwmon_sysfs() function can directly print error information. Signed-off-by: Yangtao Li <frank.li@vivo.com> Acked-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20230620090732.50025-8-frank.li@vivo.com
270 lines
6.3 KiB
C
270 lines
6.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* OMAP thermal driver interface
|
|
*
|
|
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
|
|
* Contact:
|
|
* Eduardo Valentin <eduardo.valentin@ti.com>
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/err.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/thermal.h>
|
|
#include <linux/cpufreq.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/cpu_cooling.h>
|
|
#include <linux/of.h>
|
|
|
|
#include "ti-thermal.h"
|
|
#include "ti-bandgap.h"
|
|
#include "../thermal_hwmon.h"
|
|
|
|
#define TI_BANDGAP_UPDATE_INTERVAL_MS 250
|
|
|
|
/* common data structures */
|
|
struct ti_thermal_data {
|
|
struct cpufreq_policy *policy;
|
|
struct thermal_zone_device *ti_thermal;
|
|
struct thermal_zone_device *pcb_tz;
|
|
struct thermal_cooling_device *cool_dev;
|
|
struct ti_bandgap *bgp;
|
|
enum thermal_device_mode mode;
|
|
struct work_struct thermal_wq;
|
|
int sensor_id;
|
|
bool our_zone;
|
|
};
|
|
|
|
static void ti_thermal_work(struct work_struct *work)
|
|
{
|
|
struct ti_thermal_data *data = container_of(work,
|
|
struct ti_thermal_data, thermal_wq);
|
|
|
|
thermal_zone_device_update(data->ti_thermal, THERMAL_EVENT_UNSPECIFIED);
|
|
|
|
dev_dbg(data->bgp->dev, "updated thermal zone %s\n",
|
|
thermal_zone_device_type(data->ti_thermal));
|
|
}
|
|
|
|
/**
|
|
* ti_thermal_hotspot_temperature - returns sensor extrapolated temperature
|
|
* @t: omap sensor temperature
|
|
* @s: omap sensor slope value
|
|
* @c: omap sensor const value
|
|
*/
|
|
static inline int ti_thermal_hotspot_temperature(int t, int s, int c)
|
|
{
|
|
int delta = t * s / 1000 + c;
|
|
|
|
if (delta < 0)
|
|
delta = 0;
|
|
|
|
return t + delta;
|
|
}
|
|
|
|
/* thermal zone ops */
|
|
/* Get temperature callback function for thermal zone */
|
|
static inline int __ti_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
|
|
{
|
|
struct thermal_zone_device *pcb_tz = NULL;
|
|
struct ti_thermal_data *data = thermal_zone_device_priv(tz);
|
|
struct ti_bandgap *bgp;
|
|
const struct ti_temp_sensor *s;
|
|
int ret, tmp, slope, constant;
|
|
int pcb_temp;
|
|
|
|
if (!data)
|
|
return 0;
|
|
|
|
bgp = data->bgp;
|
|
s = &bgp->conf->sensors[data->sensor_id];
|
|
|
|
ret = ti_bandgap_read_temperature(bgp, data->sensor_id, &tmp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Default constants */
|
|
slope = thermal_zone_get_slope(tz);
|
|
constant = thermal_zone_get_offset(tz);
|
|
|
|
pcb_tz = data->pcb_tz;
|
|
/* In case pcb zone is available, use the extrapolation rule with it */
|
|
if (!IS_ERR(pcb_tz)) {
|
|
ret = thermal_zone_get_temp(pcb_tz, &pcb_temp);
|
|
if (!ret) {
|
|
tmp -= pcb_temp; /* got a valid PCB temp */
|
|
slope = s->slope_pcb;
|
|
constant = s->constant_pcb;
|
|
} else {
|
|
dev_err(bgp->dev,
|
|
"Failed to read PCB state. Using defaults\n");
|
|
ret = 0;
|
|
}
|
|
}
|
|
*temp = ti_thermal_hotspot_temperature(tmp, slope, constant);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __ti_thermal_get_trend(struct thermal_zone_device *tz, int trip, enum thermal_trend *trend)
|
|
{
|
|
struct ti_thermal_data *data = thermal_zone_device_priv(tz);
|
|
struct ti_bandgap *bgp;
|
|
int id, tr, ret = 0;
|
|
|
|
bgp = data->bgp;
|
|
id = data->sensor_id;
|
|
|
|
ret = ti_bandgap_get_trend(bgp, id, &tr);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (tr > 0)
|
|
*trend = THERMAL_TREND_RAISING;
|
|
else if (tr < 0)
|
|
*trend = THERMAL_TREND_DROPPING;
|
|
else
|
|
*trend = THERMAL_TREND_STABLE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct thermal_zone_device_ops ti_of_thermal_ops = {
|
|
.get_temp = __ti_thermal_get_temp,
|
|
.get_trend = __ti_thermal_get_trend,
|
|
};
|
|
|
|
static struct ti_thermal_data
|
|
*ti_thermal_build_data(struct ti_bandgap *bgp, int id)
|
|
{
|
|
struct ti_thermal_data *data;
|
|
|
|
data = devm_kzalloc(bgp->dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data) {
|
|
dev_err(bgp->dev, "kzalloc fail\n");
|
|
return NULL;
|
|
}
|
|
data->sensor_id = id;
|
|
data->bgp = bgp;
|
|
data->mode = THERMAL_DEVICE_ENABLED;
|
|
/* pcb_tz will be either valid or PTR_ERR() */
|
|
data->pcb_tz = thermal_zone_get_zone_by_name("pcb");
|
|
INIT_WORK(&data->thermal_wq, ti_thermal_work);
|
|
|
|
return data;
|
|
}
|
|
|
|
int ti_thermal_expose_sensor(struct ti_bandgap *bgp, int id,
|
|
char *domain)
|
|
{
|
|
struct ti_thermal_data *data;
|
|
|
|
data = ti_bandgap_get_sensor_data(bgp, id);
|
|
|
|
if (IS_ERR_OR_NULL(data))
|
|
data = ti_thermal_build_data(bgp, id);
|
|
|
|
if (!data)
|
|
return -EINVAL;
|
|
|
|
/* in case this is specified by DT */
|
|
data->ti_thermal = devm_thermal_of_zone_register(bgp->dev, id,
|
|
data, &ti_of_thermal_ops);
|
|
if (IS_ERR(data->ti_thermal)) {
|
|
dev_err(bgp->dev, "thermal zone device is NULL\n");
|
|
return PTR_ERR(data->ti_thermal);
|
|
}
|
|
|
|
ti_bandgap_set_sensor_data(bgp, id, data);
|
|
ti_bandgap_write_update_interval(bgp, data->sensor_id,
|
|
TI_BANDGAP_UPDATE_INTERVAL_MS);
|
|
|
|
devm_thermal_add_hwmon_sysfs(bgp->dev, data->ti_thermal);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ti_thermal_remove_sensor(struct ti_bandgap *bgp, int id)
|
|
{
|
|
struct ti_thermal_data *data;
|
|
|
|
data = ti_bandgap_get_sensor_data(bgp, id);
|
|
|
|
if (!IS_ERR_OR_NULL(data) && data->ti_thermal) {
|
|
if (data->our_zone)
|
|
thermal_zone_device_unregister(data->ti_thermal);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ti_thermal_report_sensor_temperature(struct ti_bandgap *bgp, int id)
|
|
{
|
|
struct ti_thermal_data *data;
|
|
|
|
data = ti_bandgap_get_sensor_data(bgp, id);
|
|
|
|
schedule_work(&data->thermal_wq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ti_thermal_register_cpu_cooling(struct ti_bandgap *bgp, int id)
|
|
{
|
|
struct ti_thermal_data *data;
|
|
struct device_node *np = bgp->dev->of_node;
|
|
|
|
/*
|
|
* We are assuming here that if one deploys the zone
|
|
* using DT, then it must be aware that the cooling device
|
|
* loading has to happen via cpufreq driver.
|
|
*/
|
|
if (of_property_present(np, "#thermal-sensor-cells"))
|
|
return 0;
|
|
|
|
data = ti_bandgap_get_sensor_data(bgp, id);
|
|
if (!data || IS_ERR(data))
|
|
data = ti_thermal_build_data(bgp, id);
|
|
|
|
if (!data)
|
|
return -EINVAL;
|
|
|
|
data->policy = cpufreq_cpu_get(0);
|
|
if (!data->policy) {
|
|
pr_debug("%s: CPUFreq policy not found\n", __func__);
|
|
return -EPROBE_DEFER;
|
|
}
|
|
|
|
/* Register cooling device */
|
|
data->cool_dev = cpufreq_cooling_register(data->policy);
|
|
if (IS_ERR(data->cool_dev)) {
|
|
int ret = PTR_ERR(data->cool_dev);
|
|
dev_err(bgp->dev, "Failed to register cpu cooling device %d\n",
|
|
ret);
|
|
cpufreq_cpu_put(data->policy);
|
|
|
|
return ret;
|
|
}
|
|
ti_bandgap_set_sensor_data(bgp, id, data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id)
|
|
{
|
|
struct ti_thermal_data *data;
|
|
|
|
data = ti_bandgap_get_sensor_data(bgp, id);
|
|
|
|
if (!IS_ERR_OR_NULL(data)) {
|
|
cpufreq_cooling_unregister(data->cool_dev);
|
|
if (data->policy)
|
|
cpufreq_cpu_put(data->policy);
|
|
}
|
|
|
|
return 0;
|
|
}
|