drivers/hwmon/nzxt-kraken2.c

1 // SPDX-License-Identifier: GPL-2.0+
3  * nzxt-kraken2.c - hwmon driver for NZXT Kraken X42/X52/X62/X72 coolers
6  * communicate current fan speed, pump speed and coolant temperature.  The
7  * device does not respond to Get_Report requests for this status report.
9  * Copyright 2019-2021  Jonas Malaco <jonas@protocubo.io>
50 	if (time_after(jiffies, priv->updated + STATUS_VALIDITY * HZ))  in kraken2_read()
51 		return -ENODATA;  in kraken2_read()
55 		*val = priv->temp_input[channel];  in kraken2_read()
58 		*val = priv->fan_input[channel];  in kraken2_read()
61 		return -EOPNOTSUPP; /* unreachable */  in kraken2_read()
78 		return -EOPNOTSUPP; /* unreachable */  in kraken2_read_string()
104 			     struct hid_report *report, u8 *data, int size)  in kraken2_raw_event()  argument
108 	if (size < 7 || report->id != STATUS_REPORT_ID)  in kraken2_raw_event()
122 	priv->temp_input[0] = data[1] * 1000 + data[2] * 100;  in kraken2_raw_event()
124 	priv->fan_input[0] = get_unaligned_be16(data + 3);  in kraken2_raw_event()
125 	priv->fan_input[1] = get_unaligned_be16(data + 5);  in kraken2_raw_event()
127 	priv->updated = jiffies;  in kraken2_raw_event()
138 	priv = devm_kzalloc(&hdev->dev, sizeof(*priv), GFP_KERNEL);  in kraken2_probe()
140 		return -ENOMEM;  in kraken2_probe()
142 	priv->hid_dev = hdev;  in kraken2_probe()
146 	 * Initialize ->updated to STATUS_VALIDITY seconds in the past, making  in kraken2_probe()
150 	priv->updated = jiffies - STATUS_VALIDITY * HZ;  in kraken2_probe()
159 	 * Enable hidraw so existing user-space tools can continue to work.  in kraken2_probe()
173 	priv->hwmon_dev = hwmon_device_register_with_info(&hdev->dev, "kraken2",  in kraken2_probe()
176 	if (IS_ERR(priv->hwmon_dev)) {  in kraken2_probe()
177 		ret = PTR_ERR(priv->hwmon_dev);  in kraken2_probe()
195 	hwmon_device_unregister(priv->hwmon_dev);  in kraken2_remove()
209 	.name = "nzxt-kraken2",