// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
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<http://rt2x00.serialmonkey.com>
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*/
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/*
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Module: rt2x00lib
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Abstract: rt2x00 led specific routines.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include "rt2x00.h"
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#include "rt2x00lib.h"
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void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev, int rssi)
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{
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struct rt2x00_led *led = &rt2x00dev->led_qual;
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unsigned int brightness;
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if ((led->type != LED_TYPE_QUALITY) || !(led->flags & LED_REGISTERED))
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return;
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/*
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* Led handling requires a positive value for the rssi,
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* to do that correctly we need to add the correction.
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*/
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rssi += rt2x00dev->rssi_offset;
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/*
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* Get the rssi level, this is used to convert the rssi
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* to a LED value inside the range LED_OFF - LED_FULL.
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*/
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if (rssi <= 30)
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rssi = 0;
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else if (rssi <= 39)
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rssi = 1;
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else if (rssi <= 49)
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rssi = 2;
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else if (rssi <= 53)
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rssi = 3;
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else if (rssi <= 63)
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rssi = 4;
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else
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rssi = 5;
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/*
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* Note that we must _not_ send LED_OFF since the driver
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* is going to calculate the value and might use it in a
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* division.
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*/
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brightness = ((LED_FULL / 6) * rssi) + 1;
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if (brightness != led->led_dev.brightness) {
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led->led_dev.brightness_set(&led->led_dev, brightness);
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led->led_dev.brightness = brightness;
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}
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}
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static void rt2x00led_led_simple(struct rt2x00_led *led, bool enabled)
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{
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unsigned int brightness = enabled ? LED_FULL : LED_OFF;
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if (!(led->flags & LED_REGISTERED))
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return;
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led->led_dev.brightness_set(&led->led_dev, brightness);
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led->led_dev.brightness = brightness;
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}
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void rt2x00led_led_activity(struct rt2x00_dev *rt2x00dev, bool enabled)
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{
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if (rt2x00dev->led_qual.type == LED_TYPE_ACTIVITY)
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rt2x00led_led_simple(&rt2x00dev->led_qual, enabled);
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}
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void rt2x00leds_led_assoc(struct rt2x00_dev *rt2x00dev, bool enabled)
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{
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if (rt2x00dev->led_assoc.type == LED_TYPE_ASSOC)
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rt2x00led_led_simple(&rt2x00dev->led_assoc, enabled);
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}
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void rt2x00leds_led_radio(struct rt2x00_dev *rt2x00dev, bool enabled)
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{
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if (rt2x00dev->led_radio.type == LED_TYPE_RADIO)
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rt2x00led_led_simple(&rt2x00dev->led_radio, enabled);
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}
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static int rt2x00leds_register_led(struct rt2x00_dev *rt2x00dev,
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struct rt2x00_led *led,
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const char *name)
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{
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struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
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int retval;
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led->led_dev.name = name;
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led->led_dev.brightness = LED_OFF;
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retval = led_classdev_register(device, &led->led_dev);
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if (retval) {
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rt2x00_err(rt2x00dev, "Failed to register led handler\n");
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return retval;
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}
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led->flags |= LED_REGISTERED;
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return 0;
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}
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void rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
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{
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char name[36];
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int retval;
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unsigned long on_period;
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unsigned long off_period;
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const char *phy_name = wiphy_name(rt2x00dev->hw->wiphy);
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if (rt2x00dev->led_radio.flags & LED_INITIALIZED) {
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snprintf(name, sizeof(name), "%s-%s::radio",
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rt2x00dev->ops->name, phy_name);
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retval = rt2x00leds_register_led(rt2x00dev,
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&rt2x00dev->led_radio,
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name);
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if (retval)
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goto exit_fail;
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}
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if (rt2x00dev->led_assoc.flags & LED_INITIALIZED) {
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snprintf(name, sizeof(name), "%s-%s::assoc",
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rt2x00dev->ops->name, phy_name);
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retval = rt2x00leds_register_led(rt2x00dev,
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&rt2x00dev->led_assoc,
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name);
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if (retval)
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goto exit_fail;
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}
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if (rt2x00dev->led_qual.flags & LED_INITIALIZED) {
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snprintf(name, sizeof(name), "%s-%s::quality",
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rt2x00dev->ops->name, phy_name);
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retval = rt2x00leds_register_led(rt2x00dev,
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&rt2x00dev->led_qual,
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name);
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if (retval)
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goto exit_fail;
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}
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/*
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* Initialize blink time to default value:
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* On period: 70ms
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* Off period: 30ms
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*/
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if (rt2x00dev->led_radio.led_dev.blink_set) {
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on_period = 70;
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off_period = 30;
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rt2x00dev->led_radio.led_dev.blink_set(
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&rt2x00dev->led_radio.led_dev, &on_period, &off_period);
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}
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return;
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exit_fail:
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rt2x00leds_unregister(rt2x00dev);
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}
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static void rt2x00leds_unregister_led(struct rt2x00_led *led)
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{
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led_classdev_unregister(&led->led_dev);
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/*
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* This might look weird, but when we are unregistering while
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* suspended the led is already off, and since we haven't
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* fully resumed yet, access to the device might not be
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* possible yet.
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*/
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if (!(led->led_dev.flags & LED_SUSPENDED))
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led->led_dev.brightness_set(&led->led_dev, LED_OFF);
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led->flags &= ~LED_REGISTERED;
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}
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void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev)
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{
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if (rt2x00dev->led_qual.flags & LED_REGISTERED)
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rt2x00leds_unregister_led(&rt2x00dev->led_qual);
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if (rt2x00dev->led_assoc.flags & LED_REGISTERED)
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rt2x00leds_unregister_led(&rt2x00dev->led_assoc);
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if (rt2x00dev->led_radio.flags & LED_REGISTERED)
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rt2x00leds_unregister_led(&rt2x00dev->led_radio);
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}
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static inline void rt2x00leds_suspend_led(struct rt2x00_led *led)
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{
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led_classdev_suspend(&led->led_dev);
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/* This shouldn't be needed, but just to be safe */
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led->led_dev.brightness_set(&led->led_dev, LED_OFF);
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led->led_dev.brightness = LED_OFF;
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}
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void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev)
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{
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if (rt2x00dev->led_qual.flags & LED_REGISTERED)
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rt2x00leds_suspend_led(&rt2x00dev->led_qual);
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if (rt2x00dev->led_assoc.flags & LED_REGISTERED)
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rt2x00leds_suspend_led(&rt2x00dev->led_assoc);
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if (rt2x00dev->led_radio.flags & LED_REGISTERED)
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rt2x00leds_suspend_led(&rt2x00dev->led_radio);
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}
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static inline void rt2x00leds_resume_led(struct rt2x00_led *led)
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{
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led_classdev_resume(&led->led_dev);
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/* Device might have enabled the LEDS during resume */
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led->led_dev.brightness_set(&led->led_dev, LED_OFF);
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led->led_dev.brightness = LED_OFF;
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}
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void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev)
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{
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if (rt2x00dev->led_radio.flags & LED_REGISTERED)
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rt2x00leds_resume_led(&rt2x00dev->led_radio);
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if (rt2x00dev->led_assoc.flags & LED_REGISTERED)
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rt2x00leds_resume_led(&rt2x00dev->led_assoc);
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if (rt2x00dev->led_qual.flags & LED_REGISTERED)
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rt2x00leds_resume_led(&rt2x00dev->led_qual);
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}
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