1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
7 #include <linux/module.h>
9 #include <linux/platform_device.h>
11 #include <linux/slab.h>
12 #include <linux/thermal.h>
15 static int tsens_get_temp(void *data, int *temp)
17 const struct tsens_sensor *s = data;
18 struct tsens_priv *priv = s->priv;
20 return priv->ops->get_temp(priv, s->id, temp);
23 static int tsens_get_trend(void *data, int trip, enum thermal_trend *trend)
25 const struct tsens_sensor *s = data;
26 struct tsens_priv *priv = s->priv;
28 if (priv->ops->get_trend)
29 return priv->ops->get_trend(priv, s->id, trend);
34 static int __maybe_unused tsens_suspend(struct device *dev)
36 struct tsens_priv *priv = dev_get_drvdata(dev);
38 if (priv->ops && priv->ops->suspend)
39 return priv->ops->suspend(priv);
44 static int __maybe_unused tsens_resume(struct device *dev)
46 struct tsens_priv *priv = dev_get_drvdata(dev);
48 if (priv->ops && priv->ops->resume)
49 return priv->ops->resume(priv);
54 static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume);
56 static const struct of_device_id tsens_table[] = {
58 .compatible = "qcom,msm8916-tsens",
61 .compatible = "qcom,msm8974-tsens",
64 .compatible = "qcom,msm8996-tsens",
67 .compatible = "qcom,tsens-v1",
68 .data = &data_tsens_v1,
70 .compatible = "qcom,tsens-v2",
71 .data = &data_tsens_v2,
75 MODULE_DEVICE_TABLE(of, tsens_table);
77 static const struct thermal_zone_of_device_ops tsens_of_ops = {
78 .get_temp = tsens_get_temp,
79 .get_trend = tsens_get_trend,
82 static int tsens_register(struct tsens_priv *priv)
85 struct thermal_zone_device *tzd;
87 for (i = 0; i < priv->num_sensors; i++) {
88 priv->sensor[i].priv = priv;
89 priv->sensor[i].id = i;
90 tzd = devm_thermal_zone_of_sensor_register(priv->dev, i,
95 priv->sensor[i].tzd = tzd;
96 if (priv->ops->enable)
97 priv->ops->enable(priv, i);
102 static int tsens_probe(struct platform_device *pdev)
106 struct device_node *np;
107 struct tsens_priv *priv;
108 const struct tsens_plat_data *data;
109 const struct of_device_id *id;
112 if (pdev->dev.of_node)
115 dev = pdev->dev.parent;
119 id = of_match_node(tsens_table, np);
125 num_sensors = data->num_sensors;
128 of_property_read_u32(np, "#qcom,sensors", &num_sensors);
130 if (num_sensors <= 0) {
131 dev_err(dev, "invalid number of sensors\n");
135 priv = devm_kzalloc(dev,
136 struct_size(priv, sensor, num_sensors),
142 priv->num_sensors = num_sensors;
143 priv->ops = data->ops;
144 for (i = 0; i < priv->num_sensors; i++) {
146 priv->sensor[i].hw_id = data->hw_ids[i];
148 priv->sensor[i].hw_id = i;
150 priv->feat = data->feat;
151 priv->fields = data->fields;
153 if (!priv->ops || !priv->ops->init || !priv->ops->get_temp)
156 ret = priv->ops->init(priv);
158 dev_err(dev, "tsens init failed\n");
162 if (priv->ops->calibrate) {
163 ret = priv->ops->calibrate(priv);
165 if (ret != -EPROBE_DEFER)
166 dev_err(dev, "tsens calibration failed\n");
171 ret = tsens_register(priv);
173 platform_set_drvdata(pdev, priv);
178 static int tsens_remove(struct platform_device *pdev)
180 struct tsens_priv *priv = platform_get_drvdata(pdev);
182 if (priv->ops->disable)
183 priv->ops->disable(priv);
188 static struct platform_driver tsens_driver = {
189 .probe = tsens_probe,
190 .remove = tsens_remove,
192 .name = "qcom-tsens",
194 .of_match_table = tsens_table,
197 module_platform_driver(tsens_driver);
199 MODULE_LICENSE("GPL v2");
200 MODULE_DESCRIPTION("QCOM Temperature Sensor driver");
201 MODULE_ALIAS("platform:qcom-tsens");