1 // SPDX-License-Identifier: GPL-2.0
7  * state of the sensor, keeping it on only while userspace holds an open file
31 	gpiod_set_value_cansleep(hps->enable_gpio, state);  in hps_set_power()
36 	struct hps_drvdata *hps = container_of(file->private_data,  in hps_open()
38 	struct device *dev = &hps->client->dev;  in hps_open()
45 	struct hps_drvdata *hps = container_of(file->private_data,  in hps_release()
47 	struct device *dev = &hps->client->dev;  in hps_release()
63 	hps = devm_kzalloc(&client->dev, sizeof(*hps), GFP_KERNEL);  in hps_i2c_probe()
65 		return -ENOMEM;  in hps_i2c_probe()
67 	hps->misc_device.parent = &client->dev;  in hps_i2c_probe()
68 	hps->misc_device.minor = MISC_DYNAMIC_MINOR;  in hps_i2c_probe()
69 	hps->misc_device.name = "cros-hps";  in hps_i2c_probe()
70 	hps->misc_device.fops = &hps_fops;  in hps_i2c_probe()
73 	hps->client = client;  in hps_i2c_probe()
76 	 * HPS is powered on from firmware before entering the kernel, so we  in hps_i2c_probe()
78 	 * state. The peripheral is powered off after successful probe below.  in hps_i2c_probe()
80 	hps->enable_gpio = devm_gpiod_get(&client->dev, "enable", GPIOD_OUT_HIGH);  in hps_i2c_probe()
81 	if (IS_ERR(hps->enable_gpio)) {  in hps_i2c_probe()
82 		ret = PTR_ERR(hps->enable_gpio);  in hps_i2c_probe()
83 		dev_err(&client->dev, "failed to get enable gpio: %d\n", ret);  in hps_i2c_probe()
87 	ret = misc_register(&hps->misc_device);  in hps_i2c_probe()
89 		dev_err(&client->dev, "failed to initialize misc device: %d\n", ret);  in hps_i2c_probe()
94 	pm_runtime_enable(&client->dev);  in hps_i2c_probe()
102 	pm_runtime_disable(&client->dev);  in hps_i2c_remove()
103 	misc_deregister(&hps->misc_device);  in hps_i2c_remove()
106 	 * Re-enable HPS, in order to return it to its default state  in hps_i2c_remove()
107 	 * (i.e. powered on).  in hps_i2c_remove()
132 	{ "cros-hps", 0 },
150 		.name = "cros-hps",