1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Intel Wireless WiMAX Connection 2400m
4 * Sysfs interfaces to show driver and device information
5 *
6 * Copyright (C) 2007 Intel Corporation <linux-wimax@intel.com>
7 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
8 */
9
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/spinlock.h>
13 #include <linux/device.h>
14 #include "i2400m.h"
15
16
17 #define D_SUBMODULE sysfs
18 #include "debug-levels.h"
19
20
21 /*
22 * Set the idle timeout (msecs)
23 *
24 * FIXME: eventually this should be a common WiMAX stack method, but
25 * would like to wait to see how other devices manage it.
26 */
27 static
i2400m_idle_timeout_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t size)28 ssize_t i2400m_idle_timeout_store(struct device *dev,
29 struct device_attribute *attr,
30 const char *buf, size_t size)
31 {
32 ssize_t result;
33 struct i2400m *i2400m = net_dev_to_i2400m(to_net_dev(dev));
34 unsigned val;
35
36 result = -EINVAL;
37 if (sscanf(buf, "%u\n", &val) != 1)
38 goto error_no_unsigned;
39 if (val != 0 && (val < 100 || val > 300000 || val % 100 != 0)) {
40 dev_err(dev, "idle_timeout: %u: invalid msecs specification; "
41 "valid values are 0, 100-300000 in 100 increments\n",
42 val);
43 goto error_bad_value;
44 }
45 result = i2400m_set_idle_timeout(i2400m, val);
46 if (result >= 0)
47 result = size;
48 error_no_unsigned:
49 error_bad_value:
50 return result;
51 }
52
53 static
54 DEVICE_ATTR_WO(i2400m_idle_timeout);
55
56 static
57 struct attribute *i2400m_dev_attrs[] = {
58 &dev_attr_i2400m_idle_timeout.attr,
59 NULL,
60 };
61
62 struct attribute_group i2400m_dev_attr_group = {
63 .name = NULL, /* we want them in the same directory */
64 .attrs = i2400m_dev_attrs,
65 };
66
