248 lines
5.2 KiB
C
248 lines
5.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2015, The Linux Foundation. All rights reserved.
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*/
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#include <linux/debugfs.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/slab.h>
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#include <linux/thermal.h>
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#include "tsens.h"
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static int tsens_get_temp(void *data, int *temp)
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{
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struct tsens_sensor *s = data;
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struct tsens_priv *priv = s->priv;
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return priv->ops->get_temp(s, temp);
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}
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static int tsens_get_trend(void *data, int trip, enum thermal_trend *trend)
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{
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struct tsens_sensor *s = data;
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struct tsens_priv *priv = s->priv;
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if (priv->ops->get_trend)
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return priv->ops->get_trend(s, trend);
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return -ENOTSUPP;
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}
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static int __maybe_unused tsens_suspend(struct device *dev)
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{
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struct tsens_priv *priv = dev_get_drvdata(dev);
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if (priv->ops && priv->ops->suspend)
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return priv->ops->suspend(priv);
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return 0;
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}
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static int __maybe_unused tsens_resume(struct device *dev)
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{
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struct tsens_priv *priv = dev_get_drvdata(dev);
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if (priv->ops && priv->ops->resume)
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return priv->ops->resume(priv);
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return 0;
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}
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static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume);
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static const struct of_device_id tsens_table[] = {
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{
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.compatible = "qcom,msm8916-tsens",
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.data = &data_8916,
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}, {
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.compatible = "qcom,msm8974-tsens",
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.data = &data_8974,
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}, {
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.compatible = "qcom,msm8976-tsens",
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.data = &data_8976,
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}, {
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.compatible = "qcom,msm8996-tsens",
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.data = &data_8996,
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}, {
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.compatible = "qcom,tsens-v1",
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.data = &data_tsens_v1,
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}, {
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.compatible = "qcom,tsens-v2",
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.data = &data_tsens_v2,
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},
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{}
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};
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MODULE_DEVICE_TABLE(of, tsens_table);
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static const struct thermal_zone_of_device_ops tsens_of_ops = {
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.get_temp = tsens_get_temp,
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.get_trend = tsens_get_trend,
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.set_trips = tsens_set_trips,
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};
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static int tsens_register_irq(struct tsens_priv *priv, char *irqname,
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irq_handler_t thread_fn)
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{
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struct platform_device *pdev;
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int ret, irq;
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pdev = of_find_device_by_node(priv->dev->of_node);
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if (!pdev)
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return -ENODEV;
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irq = platform_get_irq_byname(pdev, irqname);
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if (irq < 0) {
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ret = irq;
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/* For old DTs with no IRQ defined */
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if (irq == -ENXIO)
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ret = 0;
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} else {
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ret = devm_request_threaded_irq(&pdev->dev, irq,
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NULL, thread_fn,
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IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
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dev_name(&pdev->dev), priv);
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if (ret)
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dev_err(&pdev->dev, "%s: failed to get irq\n",
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__func__);
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else
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enable_irq_wake(irq);
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}
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put_device(&pdev->dev);
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return ret;
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}
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static int tsens_register(struct tsens_priv *priv)
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{
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int i, ret;
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struct thermal_zone_device *tzd;
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for (i = 0; i < priv->num_sensors; i++) {
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priv->sensor[i].priv = priv;
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tzd = devm_thermal_zone_of_sensor_register(priv->dev, priv->sensor[i].hw_id,
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&priv->sensor[i],
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&tsens_of_ops);
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if (IS_ERR(tzd))
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continue;
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priv->sensor[i].tzd = tzd;
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if (priv->ops->enable)
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priv->ops->enable(priv, i);
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}
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ret = tsens_register_irq(priv, "uplow", tsens_irq_thread);
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if (ret < 0)
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return ret;
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if (priv->feat->crit_int)
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ret = tsens_register_irq(priv, "critical",
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tsens_critical_irq_thread);
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return ret;
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}
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static int tsens_probe(struct platform_device *pdev)
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{
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int ret, i;
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struct device *dev;
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struct device_node *np;
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struct tsens_priv *priv;
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const struct tsens_plat_data *data;
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const struct of_device_id *id;
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u32 num_sensors;
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if (pdev->dev.of_node)
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dev = &pdev->dev;
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else
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dev = pdev->dev.parent;
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np = dev->of_node;
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id = of_match_node(tsens_table, np);
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if (id)
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data = id->data;
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else
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data = &data_8960;
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num_sensors = data->num_sensors;
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if (np)
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of_property_read_u32(np, "#qcom,sensors", &num_sensors);
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if (num_sensors <= 0) {
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dev_err(dev, "%s: invalid number of sensors\n", __func__);
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return -EINVAL;
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}
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priv = devm_kzalloc(dev,
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struct_size(priv, sensor, num_sensors),
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GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->dev = dev;
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priv->num_sensors = num_sensors;
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priv->ops = data->ops;
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for (i = 0; i < priv->num_sensors; i++) {
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if (data->hw_ids)
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priv->sensor[i].hw_id = data->hw_ids[i];
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else
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priv->sensor[i].hw_id = i;
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}
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priv->feat = data->feat;
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priv->fields = data->fields;
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platform_set_drvdata(pdev, priv);
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if (!priv->ops || !priv->ops->init || !priv->ops->get_temp)
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return -EINVAL;
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ret = priv->ops->init(priv);
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if (ret < 0) {
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dev_err(dev, "%s: init failed\n", __func__);
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return ret;
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}
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if (priv->ops->calibrate) {
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ret = priv->ops->calibrate(priv);
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if (ret < 0) {
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if (ret != -EPROBE_DEFER)
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dev_err(dev, "%s: calibration failed\n", __func__);
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return ret;
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}
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}
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return tsens_register(priv);
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}
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static int tsens_remove(struct platform_device *pdev)
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{
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struct tsens_priv *priv = platform_get_drvdata(pdev);
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debugfs_remove_recursive(priv->debug_root);
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tsens_disable_irq(priv);
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if (priv->ops->disable)
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priv->ops->disable(priv);
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return 0;
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}
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static struct platform_driver tsens_driver = {
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.probe = tsens_probe,
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.remove = tsens_remove,
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.driver = {
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.name = "qcom-tsens",
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.pm = &tsens_pm_ops,
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.of_match_table = tsens_table,
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},
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};
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module_platform_driver(tsens_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("QCOM Temperature Sensor driver");
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MODULE_ALIAS("platform:qcom-tsens");
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