This source file includes following definitions.
- tsens_get_temp
- tsens_get_trend
- tsens_suspend
- tsens_resume
- tsens_register
- tsens_probe
- tsens_remove
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6 #include <linux/err.h>
7 #include <linux/module.h>
8 #include <linux/of.h>
9 #include <linux/platform_device.h>
10 #include <linux/pm.h>
11 #include <linux/slab.h>
12 #include <linux/thermal.h>
13 #include "tsens.h"
14
15 static int tsens_get_temp(void *data, int *temp)
16 {
17 const struct tsens_sensor *s = data;
18 struct tsens_priv *priv = s->priv;
19
20 return priv->ops->get_temp(priv, s->id, temp);
21 }
22
23 static int tsens_get_trend(void *data, int trip, enum thermal_trend *trend)
24 {
25 const struct tsens_sensor *s = data;
26 struct tsens_priv *priv = s->priv;
27
28 if (priv->ops->get_trend)
29 return priv->ops->get_trend(priv, s->id, trend);
30
31 return -ENOTSUPP;
32 }
33
34 static int __maybe_unused tsens_suspend(struct device *dev)
35 {
36 struct tsens_priv *priv = dev_get_drvdata(dev);
37
38 if (priv->ops && priv->ops->suspend)
39 return priv->ops->suspend(priv);
40
41 return 0;
42 }
43
44 static int __maybe_unused tsens_resume(struct device *dev)
45 {
46 struct tsens_priv *priv = dev_get_drvdata(dev);
47
48 if (priv->ops && priv->ops->resume)
49 return priv->ops->resume(priv);
50
51 return 0;
52 }
53
54 static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume);
55
56 static const struct of_device_id tsens_table[] = {
57 {
58 .compatible = "qcom,msm8916-tsens",
59 .data = &data_8916,
60 }, {
61 .compatible = "qcom,msm8974-tsens",
62 .data = &data_8974,
63 }, {
64 .compatible = "qcom,msm8996-tsens",
65 .data = &data_8996,
66 }, {
67 .compatible = "qcom,tsens-v1",
68 .data = &data_tsens_v1,
69 }, {
70 .compatible = "qcom,tsens-v2",
71 .data = &data_tsens_v2,
72 },
73 {}
74 };
75 MODULE_DEVICE_TABLE(of, tsens_table);
76
77 static const struct thermal_zone_of_device_ops tsens_of_ops = {
78 .get_temp = tsens_get_temp,
79 .get_trend = tsens_get_trend,
80 };
81
82 static int tsens_register(struct tsens_priv *priv)
83 {
84 int i;
85 struct thermal_zone_device *tzd;
86
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,
91 &priv->sensor[i],
92 &tsens_of_ops);
93 if (IS_ERR(tzd))
94 continue;
95 priv->sensor[i].tzd = tzd;
96 if (priv->ops->enable)
97 priv->ops->enable(priv, i);
98 }
99 return 0;
100 }
101
102 static int tsens_probe(struct platform_device *pdev)
103 {
104 int ret, i;
105 struct device *dev;
106 struct device_node *np;
107 struct tsens_priv *priv;
108 const struct tsens_plat_data *data;
109 const struct of_device_id *id;
110 u32 num_sensors;
111
112 if (pdev->dev.of_node)
113 dev = &pdev->dev;
114 else
115 dev = pdev->dev.parent;
116
117 np = dev->of_node;
118
119 id = of_match_node(tsens_table, np);
120 if (id)
121 data = id->data;
122 else
123 data = &data_8960;
124
125 num_sensors = data->num_sensors;
126
127 if (np)
128 of_property_read_u32(np, "#qcom,sensors", &num_sensors);
129
130 if (num_sensors <= 0) {
131 dev_err(dev, "invalid number of sensors\n");
132 return -EINVAL;
133 }
134
135 priv = devm_kzalloc(dev,
136 struct_size(priv, sensor, num_sensors),
137 GFP_KERNEL);
138 if (!priv)
139 return -ENOMEM;
140
141 priv->dev = dev;
142 priv->num_sensors = num_sensors;
143 priv->ops = data->ops;
144 for (i = 0; i < priv->num_sensors; i++) {
145 if (data->hw_ids)
146 priv->sensor[i].hw_id = data->hw_ids[i];
147 else
148 priv->sensor[i].hw_id = i;
149 }
150 priv->feat = data->feat;
151 priv->fields = data->fields;
152
153 if (!priv->ops || !priv->ops->init || !priv->ops->get_temp)
154 return -EINVAL;
155
156 ret = priv->ops->init(priv);
157 if (ret < 0) {
158 dev_err(dev, "tsens init failed\n");
159 return ret;
160 }
161
162 if (priv->ops->calibrate) {
163 ret = priv->ops->calibrate(priv);
164 if (ret < 0) {
165 if (ret != -EPROBE_DEFER)
166 dev_err(dev, "tsens calibration failed\n");
167 return ret;
168 }
169 }
170
171 ret = tsens_register(priv);
172
173 platform_set_drvdata(pdev, priv);
174
175 return ret;
176 }
177
178 static int tsens_remove(struct platform_device *pdev)
179 {
180 struct tsens_priv *priv = platform_get_drvdata(pdev);
181
182 if (priv->ops->disable)
183 priv->ops->disable(priv);
184
185 return 0;
186 }
187
188 static struct platform_driver tsens_driver = {
189 .probe = tsens_probe,
190 .remove = tsens_remove,
191 .driver = {
192 .name = "qcom-tsens",
193 .pm = &tsens_pm_ops,
194 .of_match_table = tsens_table,
195 },
196 };
197 module_platform_driver(tsens_driver);
198
199 MODULE_LICENSE("GPL v2");
200 MODULE_DESCRIPTION("QCOM Temperature Sensor driver");
201 MODULE_ALIAS("platform:qcom-tsens");