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152 lines
3.8 KiB
152 lines
3.8 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* Copyright (C) 2016 National Instruments Corp. */ |
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#include <linux/leds.h> |
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#include <linux/phy.h> |
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#include <linux/phy_led_triggers.h> |
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#include <linux/netdevice.h> |
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static struct phy_led_trigger *phy_speed_to_led_trigger(struct phy_device *phy, |
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unsigned int speed) |
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{ |
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unsigned int i; |
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for (i = 0; i < phy->phy_num_led_triggers; i++) { |
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if (phy->phy_led_triggers[i].speed == speed) |
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return &phy->phy_led_triggers[i]; |
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} |
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return NULL; |
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} |
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static void phy_led_trigger_no_link(struct phy_device *phy) |
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{ |
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if (phy->last_triggered) { |
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led_trigger_event(&phy->last_triggered->trigger, LED_OFF); |
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led_trigger_event(&phy->led_link_trigger->trigger, LED_OFF); |
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phy->last_triggered = NULL; |
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} |
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} |
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void phy_led_trigger_change_speed(struct phy_device *phy) |
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{ |
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struct phy_led_trigger *plt; |
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if (!phy->link) |
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return phy_led_trigger_no_link(phy); |
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if (phy->speed == 0) |
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return; |
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plt = phy_speed_to_led_trigger(phy, phy->speed); |
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if (!plt) { |
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netdev_alert(phy->attached_dev, |
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"No phy led trigger registered for speed(%d)\n", |
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phy->speed); |
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return phy_led_trigger_no_link(phy); |
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} |
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if (plt != phy->last_triggered) { |
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if (!phy->last_triggered) |
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led_trigger_event(&phy->led_link_trigger->trigger, |
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LED_FULL); |
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else |
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led_trigger_event(&phy->last_triggered->trigger, LED_OFF); |
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led_trigger_event(&plt->trigger, LED_FULL); |
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phy->last_triggered = plt; |
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} |
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} |
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EXPORT_SYMBOL_GPL(phy_led_trigger_change_speed); |
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static void phy_led_trigger_format_name(struct phy_device *phy, char *buf, |
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size_t size, const char *suffix) |
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{ |
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snprintf(buf, size, PHY_ID_FMT ":%s", |
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phy->mdio.bus->id, phy->mdio.addr, suffix); |
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} |
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static int phy_led_trigger_register(struct phy_device *phy, |
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struct phy_led_trigger *plt, |
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unsigned int speed, |
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const char *suffix) |
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{ |
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plt->speed = speed; |
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phy_led_trigger_format_name(phy, plt->name, sizeof(plt->name), suffix); |
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plt->trigger.name = plt->name; |
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return led_trigger_register(&plt->trigger); |
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} |
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static void phy_led_trigger_unregister(struct phy_led_trigger *plt) |
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{ |
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led_trigger_unregister(&plt->trigger); |
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} |
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int phy_led_triggers_register(struct phy_device *phy) |
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{ |
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int i, err; |
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unsigned int speeds[50]; |
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phy->phy_num_led_triggers = phy_supported_speeds(phy, speeds, |
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ARRAY_SIZE(speeds)); |
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if (!phy->phy_num_led_triggers) |
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return 0; |
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phy->led_link_trigger = devm_kzalloc(&phy->mdio.dev, |
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sizeof(*phy->led_link_trigger), |
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GFP_KERNEL); |
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if (!phy->led_link_trigger) { |
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err = -ENOMEM; |
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goto out_clear; |
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} |
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err = phy_led_trigger_register(phy, phy->led_link_trigger, 0, "link"); |
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if (err) |
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goto out_free_link; |
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phy->phy_led_triggers = devm_kcalloc(&phy->mdio.dev, |
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phy->phy_num_led_triggers, |
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sizeof(struct phy_led_trigger), |
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GFP_KERNEL); |
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if (!phy->phy_led_triggers) { |
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err = -ENOMEM; |
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goto out_unreg_link; |
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} |
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for (i = 0; i < phy->phy_num_led_triggers; i++) { |
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err = phy_led_trigger_register(phy, &phy->phy_led_triggers[i], |
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speeds[i], |
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phy_speed_to_str(speeds[i])); |
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if (err) |
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goto out_unreg; |
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} |
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phy->last_triggered = NULL; |
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phy_led_trigger_change_speed(phy); |
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return 0; |
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out_unreg: |
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while (i--) |
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phy_led_trigger_unregister(&phy->phy_led_triggers[i]); |
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devm_kfree(&phy->mdio.dev, phy->phy_led_triggers); |
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out_unreg_link: |
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phy_led_trigger_unregister(phy->led_link_trigger); |
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out_free_link: |
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devm_kfree(&phy->mdio.dev, phy->led_link_trigger); |
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phy->led_link_trigger = NULL; |
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out_clear: |
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phy->phy_num_led_triggers = 0; |
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return err; |
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} |
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EXPORT_SYMBOL_GPL(phy_led_triggers_register); |
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void phy_led_triggers_unregister(struct phy_device *phy) |
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{ |
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int i; |
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for (i = 0; i < phy->phy_num_led_triggers; i++) |
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phy_led_trigger_unregister(&phy->phy_led_triggers[i]); |
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if (phy->led_link_trigger) |
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phy_led_trigger_unregister(phy->led_link_trigger); |
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} |
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EXPORT_SYMBOL_GPL(phy_led_triggers_unregister);
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