Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * WMI Thunderbolt driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2017 Dell Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/wmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define INTEL_WMI_THUNDERBOLT_GUID "86CCFD48-205E-4A77-9C48-2021CBEDE341"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static ssize_t force_power_store(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 				 struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 				 const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	struct acpi_buffer input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	u8 mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	input.length = sizeof(u8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	input.pointer = &mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	mode = hex_to_bin(buf[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	dev_dbg(dev, "force_power: storing %#x\n", mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	if (mode == 0 || mode == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		status = wmi_evaluate_method(INTEL_WMI_THUNDERBOLT_GUID, 0, 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 					     &input, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 			dev_dbg(dev, "force_power: failed to evaluate ACPI method\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 			return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		dev_dbg(dev, "force_power: unsupported mode\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static DEVICE_ATTR_WO(force_power);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static struct attribute *tbt_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	&dev_attr_force_power.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static const struct attribute_group tbt_attribute_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	.attrs = tbt_attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static int intel_wmi_thunderbolt_probe(struct wmi_device *wdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 				       const void *context)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	ret = sysfs_create_group(&wdev->dev.kobj, &tbt_attribute_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	kobject_uevent(&wdev->dev.kobj, KOBJ_CHANGE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static int intel_wmi_thunderbolt_remove(struct wmi_device *wdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	sysfs_remove_group(&wdev->dev.kobj, &tbt_attribute_group);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	kobject_uevent(&wdev->dev.kobj, KOBJ_CHANGE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static const struct wmi_device_id intel_wmi_thunderbolt_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	{ .guid_string = INTEL_WMI_THUNDERBOLT_GUID },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static struct wmi_driver intel_wmi_thunderbolt_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 		.name = "intel-wmi-thunderbolt",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 	.probe = intel_wmi_thunderbolt_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 	.remove = intel_wmi_thunderbolt_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 	.id_table = intel_wmi_thunderbolt_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) module_wmi_driver(intel_wmi_thunderbolt_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) MODULE_DEVICE_TABLE(wmi, intel_wmi_thunderbolt_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) MODULE_AUTHOR("Mario Limonciello <mario.limonciello@dell.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) MODULE_DESCRIPTION("Intel WMI Thunderbolt force power driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) MODULE_LICENSE("GPL v2");