linux/drivers/net/phy/phy_led_triggers.c
Andy Shevchenko 043d2be2a7 net: phy: leds: Deduplicate link LED trigger registration
Refactor phy_led_trigger_register() and deduplicate its functionality
when registering LED trigger for link.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20201027182146.21355-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-10-30 10:43:37 -07:00

153 lines
3.8 KiB
C

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