/drivers/net/wimax/i2400m/sysfs.c

 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 */
27static
28ssize_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;
48error_no_unsigned:
49error_bad_value:
50	return result;
51}
52
53static
54DEVICE_ATTR_WO(i2400m_idle_timeout);
55
56static
57struct attribute *i2400m_dev_attrs[] = {
58	&dev_attr_i2400m_idle_timeout.attr,
59	NULL,
60};
61
62struct attribute_group i2400m_dev_attr_group = {
63	.name = NULL,		/* we want them in the same directory */
64	.attrs = i2400m_dev_attrs,
65};