summaryrefslogtreecommitdiffstats
path: root/drivers/thermal/qcom/tsens.c
blob: 7d317660211e146a7dbce745b8205347eef72373 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
// 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,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(struct tsens_priv *priv)
{
	int i, ret, irq;
	struct thermal_zone_device *tzd;
	struct platform_device *pdev;

	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);
	}

	pdev = of_find_device_by_node(priv->dev->of_node);
	if (!pdev)
		return -ENODEV;

	irq = platform_get_irq_byname(pdev, "uplow");
	if (irq < 0) {
		ret = irq;
		goto err_put_device;
	}

	ret = devm_request_threaded_irq(&pdev->dev, irq,
					NULL, tsens_irq_thread,
					IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
					dev_name(&pdev->dev), priv);
	if (ret) {
		dev_err(&pdev->dev, "%s: failed to get irq\n", __func__);
		goto err_put_device;
	}

	enable_irq_wake(irq);

err_put_device:
	put_device(&pdev->dev);
	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");