2 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #include <linux/err.h>
16 #include <linux/module.h>
18 #include <linux/platform_device.h>
20 #include <linux/slab.h>
21 #include <linux/thermal.h>
24 static int tsens_get_temp(void *data, int *temp)
26 const struct tsens_sensor *s = data;
27 struct tsens_device *tmdev = s->tmdev;
29 return tmdev->ops->get_temp(tmdev, s->id, temp);
32 static int tsens_get_trend(void *p, int trip, enum thermal_trend *trend)
34 const struct tsens_sensor *s = p;
35 struct tsens_device *tmdev = s->tmdev;
37 if (tmdev->ops->get_trend)
38 return tmdev->ops->get_trend(tmdev, s->id, trend);
43 static int __maybe_unused tsens_suspend(struct device *dev)
45 struct tsens_device *tmdev = dev_get_drvdata(dev);
47 if (tmdev->ops && tmdev->ops->suspend)
48 return tmdev->ops->suspend(tmdev);
53 static int __maybe_unused tsens_resume(struct device *dev)
55 struct tsens_device *tmdev = dev_get_drvdata(dev);
57 if (tmdev->ops && tmdev->ops->resume)
58 return tmdev->ops->resume(tmdev);
63 static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume);
65 static const struct of_device_id tsens_table[] = {
67 .compatible = "qcom,msm8916-tsens",
70 .compatible = "qcom,msm8974-tsens",
73 .compatible = "qcom,msm8996-tsens",
76 .compatible = "qcom,tsens-v2",
77 .data = &data_tsens_v2,
81 MODULE_DEVICE_TABLE(of, tsens_table);
83 static const struct thermal_zone_of_device_ops tsens_of_ops = {
84 .get_temp = tsens_get_temp,
85 .get_trend = tsens_get_trend,
88 static int tsens_register(struct tsens_device *tmdev)
91 struct thermal_zone_device *tzd;
92 u32 *hw_id, n = tmdev->num_sensors;
94 hw_id = devm_kcalloc(tmdev->dev, n, sizeof(u32), GFP_KERNEL);
98 for (i = 0; i < tmdev->num_sensors; i++) {
99 tmdev->sensor[i].tmdev = tmdev;
100 tmdev->sensor[i].id = i;
101 tzd = devm_thermal_zone_of_sensor_register(tmdev->dev, i,
106 tmdev->sensor[i].tzd = tzd;
107 if (tmdev->ops->enable)
108 tmdev->ops->enable(tmdev, i);
113 static int tsens_probe(struct platform_device *pdev)
117 struct device_node *np;
118 struct tsens_device *tmdev;
119 const struct tsens_data *data;
120 const struct of_device_id *id;
123 if (pdev->dev.of_node)
126 dev = pdev->dev.parent;
130 id = of_match_node(tsens_table, np);
136 num_sensors = data->num_sensors;
139 of_property_read_u32(np, "#qcom,sensors", &num_sensors);
141 if (num_sensors <= 0) {
142 dev_err(dev, "invalid number of sensors\n");
146 tmdev = devm_kzalloc(dev,
147 struct_size(tmdev, sensor, num_sensors),
153 tmdev->num_sensors = num_sensors;
154 tmdev->ops = data->ops;
155 for (i = 0; i < tmdev->num_sensors; i++) {
157 tmdev->sensor[i].hw_id = data->hw_ids[i];
159 tmdev->sensor[i].hw_id = i;
162 if (!tmdev->ops || !tmdev->ops->init || !tmdev->ops->get_temp)
165 ret = tmdev->ops->init(tmdev);
167 dev_err(dev, "tsens init failed\n");
171 if (tmdev->ops->calibrate) {
172 ret = tmdev->ops->calibrate(tmdev);
174 if (ret != -EPROBE_DEFER)
175 dev_err(dev, "tsens calibration failed\n");
180 ret = tsens_register(tmdev);
182 platform_set_drvdata(pdev, tmdev);
187 static int tsens_remove(struct platform_device *pdev)
189 struct tsens_device *tmdev = platform_get_drvdata(pdev);
191 if (tmdev->ops->disable)
192 tmdev->ops->disable(tmdev);
197 static struct platform_driver tsens_driver = {
198 .probe = tsens_probe,
199 .remove = tsens_remove,
201 .name = "qcom-tsens",
203 .of_match_table = tsens_table,
206 module_platform_driver(tsens_driver);
208 MODULE_LICENSE("GPL v2");
209 MODULE_DESCRIPTION("QCOM Temperature Sensor driver");
210 MODULE_ALIAS("platform:qcom-tsens");