Merge tag 'for-5.18-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[platform/kernel/linux-starfive.git] / drivers / peci / sysfs.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2021 Intel Corporation
3
4 #include <linux/device.h>
5 #include <linux/kernel.h>
6 #include <linux/peci.h>
7
8 #include "internal.h"
9
10 static int rescan_controller(struct device *dev, void *data)
11 {
12         if (dev->type != &peci_controller_type)
13                 return 0;
14
15         return peci_controller_scan_devices(to_peci_controller(dev));
16 }
17
18 static ssize_t rescan_store(struct bus_type *bus, const char *buf, size_t count)
19 {
20         bool res;
21         int ret;
22
23         ret = kstrtobool(buf, &res);
24         if (ret)
25                 return ret;
26
27         if (!res)
28                 return count;
29
30         ret = bus_for_each_dev(&peci_bus_type, NULL, NULL, rescan_controller);
31         if (ret)
32                 return ret;
33
34         return count;
35 }
36 static BUS_ATTR_WO(rescan);
37
38 static struct attribute *peci_bus_attrs[] = {
39         &bus_attr_rescan.attr,
40         NULL
41 };
42
43 static const struct attribute_group peci_bus_group = {
44         .attrs = peci_bus_attrs,
45 };
46
47 const struct attribute_group *peci_bus_groups[] = {
48         &peci_bus_group,
49         NULL
50 };
51
52 static ssize_t remove_store(struct device *dev, struct device_attribute *attr,
53                             const char *buf, size_t count)
54 {
55         struct peci_device *device = to_peci_device(dev);
56         bool res;
57         int ret;
58
59         ret = kstrtobool(buf, &res);
60         if (ret)
61                 return ret;
62
63         if (res && device_remove_file_self(dev, attr))
64                 peci_device_destroy(device);
65
66         return count;
67 }
68 static DEVICE_ATTR_IGNORE_LOCKDEP(remove, 0200, NULL, remove_store);
69
70 static struct attribute *peci_device_attrs[] = {
71         &dev_attr_remove.attr,
72         NULL
73 };
74
75 static const struct attribute_group peci_device_group = {
76         .attrs = peci_device_attrs,
77 };
78
79 const struct attribute_group *peci_device_groups[] = {
80         &peci_device_group,
81         NULL
82 };