1 // SPDX-License-Identifier: GPL-2.0+
2 /* Copyright (C) 2016 National Instruments Corp. */
3 #include <linux/leds.h>
5 #include <linux/phy_led_triggers.h>
6 #include <linux/netdevice.h>
8 static struct phy_led_trigger *phy_speed_to_led_trigger(struct phy_device *phy,
13 for (i = 0; i < phy->phy_num_led_triggers; i++) {
14 if (phy->phy_led_triggers[i].speed == speed)
15 return &phy->phy_led_triggers[i];
20 static void phy_led_trigger_no_link(struct phy_device *phy)
22 if (phy->last_triggered) {
23 led_trigger_event(&phy->last_triggered->trigger, LED_OFF);
24 led_trigger_event(&phy->led_link_trigger->trigger, LED_OFF);
25 phy->last_triggered = NULL;
29 void phy_led_trigger_change_speed(struct phy_device *phy)
31 struct phy_led_trigger *plt;
34 return phy_led_trigger_no_link(phy);
39 plt = phy_speed_to_led_trigger(phy, phy->speed);
41 netdev_alert(phy->attached_dev,
42 "No phy led trigger registered for speed(%d)\n",
44 return phy_led_trigger_no_link(phy);
47 if (plt != phy->last_triggered) {
48 if (!phy->last_triggered)
49 led_trigger_event(&phy->led_link_trigger->trigger,
52 led_trigger_event(&phy->last_triggered->trigger, LED_OFF);
54 led_trigger_event(&plt->trigger, LED_FULL);
55 phy->last_triggered = plt;
58 EXPORT_SYMBOL_GPL(phy_led_trigger_change_speed);
60 static void phy_led_trigger_format_name(struct phy_device *phy, char *buf,
61 size_t size, const char *suffix)
63 snprintf(buf, size, PHY_ID_FMT ":%s",
64 phy->mdio.bus->id, phy->mdio.addr, suffix);
67 static int phy_led_trigger_register(struct phy_device *phy,
68 struct phy_led_trigger *plt,
73 phy_led_trigger_format_name(phy, plt->name, sizeof(plt->name), suffix);
74 plt->trigger.name = plt->name;
76 return led_trigger_register(&plt->trigger);
79 static void phy_led_trigger_unregister(struct phy_led_trigger *plt)
81 led_trigger_unregister(&plt->trigger);
84 int phy_led_triggers_register(struct phy_device *phy)
87 unsigned int speeds[50];
89 phy->phy_num_led_triggers = phy_supported_speeds(phy, speeds,
91 if (!phy->phy_num_led_triggers)
94 phy->led_link_trigger = devm_kzalloc(&phy->mdio.dev,
95 sizeof(*phy->led_link_trigger),
97 if (!phy->led_link_trigger) {
102 err = phy_led_trigger_register(phy, phy->led_link_trigger, 0, "link");
106 phy->phy_led_triggers = devm_kcalloc(&phy->mdio.dev,
107 phy->phy_num_led_triggers,
108 sizeof(struct phy_led_trigger),
110 if (!phy->phy_led_triggers) {
115 for (i = 0; i < phy->phy_num_led_triggers; i++) {
116 err = phy_led_trigger_register(phy, &phy->phy_led_triggers[i],
118 phy_speed_to_str(speeds[i]));
123 phy->last_triggered = NULL;
124 phy_led_trigger_change_speed(phy);
129 phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
130 devm_kfree(&phy->mdio.dev, phy->phy_led_triggers);
132 phy_led_trigger_unregister(phy->led_link_trigger);
134 devm_kfree(&phy->mdio.dev, phy->led_link_trigger);
135 phy->led_link_trigger = NULL;
137 phy->phy_num_led_triggers = 0;
140 EXPORT_SYMBOL_GPL(phy_led_triggers_register);
142 void phy_led_triggers_unregister(struct phy_device *phy)
146 for (i = 0; i < phy->phy_num_led_triggers; i++)
147 phy_led_trigger_unregister(&phy->phy_led_triggers[i]);
149 if (phy->led_link_trigger)
150 phy_led_trigger_unregister(phy->led_link_trigger);
152 EXPORT_SYMBOL_GPL(phy_led_triggers_unregister);