LXR linux/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};
  66