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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*/
#include <linux/debugfs.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.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)
{
struct tsens_sensor *s = data;
struct tsens_priv *priv = s->priv;
return priv->ops->get_temp(s, temp);
}
static int tsens_get_trend(void *data, int trip, enum thermal_trend *trend)
{
struct tsens_sensor *s = data;
struct tsens_priv *priv = s->priv;
if (priv->ops->get_trend)
return priv->ops->get_trend(s, trend);
return -ENOTSUPP;
}
static int __maybe_unused tsens_suspend(struct device *dev)
{
struct tsens_priv *priv = dev_get_drvdata(dev);
if (priv->ops && priv->ops->suspend)
return priv->ops->suspend(priv);
return 0;
}
static int __maybe_unused tsens_resume(struct device *dev)
{
struct tsens_priv *priv = dev_get_drvdata(dev);
if (priv->ops && priv->ops->resume)
return priv->ops->resume(priv);
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,
}, {
.compatible = "qcom,msm8976-tsens",
.data = &data_8976,
}, {
.compatible = "qcom,msm8996-tsens",
.data = &data_8996,
}, {
.compatible = "qcom,tsens-v1",
.data = &data_tsens_v1,
}, {
.compatible = "qcom,tsens-v2",
.data = &data_tsens_v2,
},
{}
};
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,
.set_trips = tsens_set_trips,
};
static int tsens_register_irq(struct tsens_priv *priv, char *irqname,
irq_handler_t thread_fn)
{
struct platform_device *pdev;
int ret, irq;
pdev = of_find_device_by_node(priv->dev->of_node);
if (!pdev)
return -ENODEV;
irq = platform_get_irq_byname(pdev, irqname);
if (irq < 0) {
ret = irq;
/* For old DTs with no IRQ defined */
if (irq == -ENXIO)
ret = 0;
} else {
ret = devm_request_threaded_irq(&pdev->dev, irq,
NULL, thread_fn,
IRQF_ONESHOT,
dev_name(&pdev->dev), priv);
if (ret)
dev_err(&pdev->dev, "%s: failed to get irq\n",
__func__);
else
enable_irq_wake(irq);
}
put_device(&pdev->dev);
return ret;
}
static int tsens_register(struct tsens_priv *priv)
{
int i, ret;
struct thermal_zone_device *tzd;
for (i = 0; i < priv->num_sensors; i++) {
priv->sensor[i].priv = priv;
tzd = devm_thermal_zone_of_sensor_register(priv->dev, priv->sensor[i].hw_id,
&priv->sensor[i],
&tsens_of_ops);
if (IS_ERR(tzd))
continue;
priv->sensor[i].tzd = tzd;
if (priv->ops->enable)
priv->ops->enable(priv, i);
}
ret = tsens_register_irq(priv, "uplow", tsens_irq_thread);
if (ret < 0)
return ret;
if (priv->feat->crit_int)
ret = tsens_register_irq(priv, "critical",
tsens_critical_irq_thread);
return ret;
}
static int tsens_probe(struct platform_device *pdev)
{
int ret, i;
struct device *dev;
struct device_node *np;
struct tsens_priv *priv;
const struct tsens_plat_data *data;
const struct of_device_id *id;
u32 num_sensors;
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)
data = id->data;
else
data = &data_8960;
num_sensors = data->num_sensors;
if (np)
of_property_read_u32(np, "#qcom,sensors", &num_sensors);
if (num_sensors <= 0) {
dev_err(dev, "%s: invalid number of sensors\n", __func__);
return -EINVAL;
}
priv = devm_kzalloc(dev,
struct_size(priv, sensor, num_sensors),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->dev = dev;
priv->num_sensors = num_sensors;
priv->ops = data->ops;
for (i = 0; i < priv->num_sensors; i++) {
if (data->hw_ids)
priv->sensor[i].hw_id = data->hw_ids[i];
else
priv->sensor[i].hw_id = i;
}
priv->feat = data->feat;
priv->fields = data->fields;
platform_set_drvdata(pdev, priv);
if (!priv->ops || !priv->ops->init || !priv->ops->get_temp)
return -EINVAL;
ret = priv->ops->init(priv);
if (ret < 0) {
dev_err(dev, "%s: init failed\n", __func__);
return ret;
}
if (priv->ops->calibrate) {
ret = priv->ops->calibrate(priv);
if (ret < 0) {
if (ret != -EPROBE_DEFER)
dev_err(dev, "%s: calibration failed\n", __func__);
return ret;
}
}
return tsens_register(priv);
}
static int tsens_remove(struct platform_device *pdev)
{
struct tsens_priv *priv = platform_get_drvdata(pdev);
debugfs_remove_recursive(priv->debug_root);
tsens_disable_irq(priv);
if (priv->ops->disable)
priv->ops->disable(priv);
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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