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/*
* Copyright (c) 2015, 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.
*
*/
#include <linux/err.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/thermal.h>
#include "tsens.h"
static int tsens_get_temp(void *data, int *temp)
{
const struct tsens_sensor *s = data;
struct tsens_device *tmdev = s->tmdev;
return tmdev->ops->get_temp(tmdev, s->id, temp);
}
static int tsens_get_trend(void *data, long *temp)
{
const struct tsens_sensor *s = data;
struct tsens_device *tmdev = s->tmdev;
if (tmdev->ops->get_trend)
return tmdev->ops->get_trend(tmdev, s->id, temp);
return -ENOTSUPP;
}
static int tsens_suspend(struct device *dev)
{
struct tsens_device *tmdev = dev_get_drvdata(dev);
if (tmdev->ops && tmdev->ops->suspend)
return tmdev->ops->suspend(tmdev);
return 0;
}
static int tsens_resume(struct device *dev)
{
struct tsens_device *tmdev = dev_get_drvdata(dev);
if (tmdev->ops && tmdev->ops->resume)
return tmdev->ops->resume(tmdev);
return 0;
}
static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume);
static const struct of_device_id tsens_table[] = {
{
.compatible = "qcom,msm8916-tsens",
.data = &data_8916,
}, {
.compatible = "qcom,msm8974-tsens",
.data = &data_8974,
},
{}
};
MODULE_DEVICE_TABLE(of, tsens_table);
static const struct thermal_zone_of_device_ops tsens_of_ops = {
.get_temp = tsens_get_temp,
.get_trend = tsens_get_trend,
};
static int tsens_register(struct tsens_device *tmdev)
{
int i;
struct thermal_zone_device *tzd;
u32 *hw_id, n = tmdev->num_sensors;
hw_id = devm_kcalloc(tmdev->dev, n, sizeof(u32), GFP_KERNEL);
if (!hw_id)
return -ENOMEM;
for (i = 0; i < tmdev->num_sensors; i++) {
tmdev->sensor[i].tmdev = tmdev;
tmdev->sensor[i].id = i;
tzd = devm_thermal_zone_of_sensor_register(tmdev->dev, i,
&tmdev->sensor[i],
&tsens_of_ops);
if (IS_ERR(tzd))
continue;
tmdev->sensor[i].tzd = tzd;
if (tmdev->ops->enable)
tmdev->ops->enable(tmdev, i);
}
return 0;
}
static int tsens_probe(struct platform_device *pdev)
{
int ret, i;
struct device *dev;
struct device_node *np;
struct tsens_sensor *s;
struct tsens_device *tmdev;
const struct tsens_data *data;
const struct of_device_id *id;
if (pdev->dev.of_node)
dev = &pdev->dev;
else
dev = pdev->dev.parent;
np = dev->of_node;
id = of_match_node(tsens_table, np);
if (!id)
return -EINVAL;
data = id->data;
if (data->num_sensors <= 0) {
dev_err(dev, "invalid number of sensors\n");
return -EINVAL;
}
tmdev = devm_kzalloc(dev, sizeof(*tmdev) +
data->num_sensors * sizeof(*s), GFP_KERNEL);
if (!tmdev)
return -ENOMEM;
tmdev->dev = dev;
tmdev->num_sensors = data->num_sensors;
tmdev->ops = data->ops;
for (i = 0; i < tmdev->num_sensors; i++) {
if (data->hw_ids)
tmdev->sensor[i].hw_id = data->hw_ids[i];
else
tmdev->sensor[i].hw_id = i;
}
if (!tmdev->ops || !tmdev->ops->init || !tmdev->ops->get_temp)
return -EINVAL;
ret = tmdev->ops->init(tmdev);
if (ret < 0) {
dev_err(dev, "tsens init failed\n");
return ret;
}
if (tmdev->ops->calibrate) {
ret = tmdev->ops->calibrate(tmdev);
if (ret < 0) {
dev_err(dev, "tsens calibration failed\n");
return ret;
}
}
ret = tsens_register(tmdev);
platform_set_drvdata(pdev, tmdev);
return ret;
}
static int tsens_remove(struct platform_device *pdev)
{
struct tsens_device *tmdev = platform_get_drvdata(pdev);
if (tmdev->ops->disable)
tmdev->ops->disable(tmdev);
return 0;
}
static struct platform_driver tsens_driver = {
.probe = tsens_probe,
.remove = tsens_remove,
.driver = {
.name = "qcom-tsens",
.pm = &tsens_pm_ops,
.of_match_table = tsens_table,
},
};
module_platform_driver(tsens_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("QCOM Temperature Sensor driver");
MODULE_ALIAS("platform:qcom-tsens");
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