1 /*
2 * Copyright (c) 2011-2020 The Linux Foundation. All rights reserved.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 /**
18 * DOC: wlan_hdd_sysfs_temperature.c
19 *
20 * Implementation for creating sysfs file temperature
21 */
22
23 #include <wlan_hdd_includes.h>
24 #include <wlan_hdd_sysfs.h>
25 #include "osif_vdev_sync.h"
26 #include <wlan_hdd_sysfs_temperature.h>
27 #include <wlan_hdd_stats.h>
28
29 static ssize_t
__hdd_sysfs_temperature_show(struct net_device * net_dev,char * buf)30 __hdd_sysfs_temperature_show(struct net_device *net_dev, char *buf)
31 {
32 struct hdd_adapter *adapter = netdev_priv(net_dev);
33 struct hdd_context *hdd_ctx;
34 int value;
35 int ret;
36
37 if (hdd_validate_adapter(adapter))
38 return -EINVAL;
39
40 hdd_ctx = WLAN_HDD_GET_CTX(adapter);
41 ret = wlan_hdd_validate_context(hdd_ctx);
42 if (ret)
43 return ret;
44
45 if (!wlan_hdd_validate_modules_state(hdd_ctx))
46 return -EINVAL;
47
48 hdd_debug("SYSFS_GET_TEMPERATURE");
49 ret = wlan_hdd_get_temperature(adapter, &value);
50
51 if (ret) {
52 hdd_err_rl("GET_TEMP failed: %d", ret);
53 return ret;
54 }
55
56 return scnprintf(buf, PAGE_SIZE, "%d\n", value);
57 }
58
59 static ssize_t
hdd_sysfs_temperature_show(struct device * dev,struct device_attribute * attr,char * buf)60 hdd_sysfs_temperature_show(struct device *dev,
61 struct device_attribute *attr,
62 char *buf)
63 {
64 struct net_device *net_dev = container_of(dev, struct net_device, dev);
65 struct osif_vdev_sync *vdev_sync;
66 ssize_t err_size;
67
68 err_size = osif_vdev_sync_op_start(net_dev, &vdev_sync);
69 if (err_size)
70 return err_size;
71
72 err_size = __hdd_sysfs_temperature_show(net_dev, buf);
73
74 osif_vdev_sync_op_stop(vdev_sync);
75
76 return err_size;
77 }
78
79 static DEVICE_ATTR(temperature, 0440,
80 hdd_sysfs_temperature_show, NULL);
81
hdd_sysfs_temperature_create(struct hdd_adapter * adapter)82 int hdd_sysfs_temperature_create(struct hdd_adapter *adapter)
83 {
84 int error;
85
86 error = device_create_file(&adapter->dev->dev,
87 &dev_attr_temperature);
88 if (error)
89 hdd_err("could not create temperature sysfs file");
90
91 return error;
92 }
93
hdd_sysfs_temperature_destroy(struct hdd_adapter * adapter)94 void hdd_sysfs_temperature_destroy(struct hdd_adapter *adapter)
95 {
96 device_remove_file(&adapter->dev->dev, &dev_attr_temperature);
97 }
98