From: Rafał Miłecki <rafal@xxxxxxxxxx>
Parse "trigger-sources", find referenced netdev & use it as default
trigger source.
Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
---
This is a proof on concept, please don't apply this patch. I'll rework
this on top of Ansuel's netdev trigger refactoring once it gets accepted
----
drivers/leds/trigger/ledtrig-netdev.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c
index d5e774d83021..c036a3671773 100644
--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -20,6 +20,8 @@
#include <linux/list.h>
#include <linux/module.h>
#include <linux/netdevice.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
#include "../leds.h"
@@ -389,6 +391,28 @@ static void netdev_trig_work(struct work_struct *work)
(atomic_read(&trigger_data->interval)*2));
}
+static void netdev_trig_of_init(struct led_classdev *led_cdev)
+{
+ struct device *dev = led_cdev->dev;
+ struct device_node *np = dev->of_node;
+ struct of_phandle_args args;
+ struct net_device *netdev;
+ int err;
+
+ err = of_parse_phandle_with_args(np, "trigger-sources", "#trigger-source-cells", 0, &args);
+ if (err || WARN_ON(!args.np)) {
+ dev_err(dev, "Failed to get trigger source phandle: %d\n", err);
+ return;
+ }
+
+ netdev = of_find_net_device_by_node(args.np);
+ if (netdev) {
+ device_name_store(dev, NULL, netdev->name, strlen(netdev->name) + 1);
+ }
+
+ of_node_put(args.np);
+}
+
static int netdev_trig_activate(struct led_classdev *led_cdev)
{
struct led_netdev_data *trigger_data;
@@ -415,6 +439,8 @@ static int netdev_trig_activate(struct led_classdev *led_cdev)
led_set_trigger_data(led_cdev, trigger_data);
+ netdev_trig_of_init(led_cdev);
+
rc = register_netdevice_notifier(&trigger_data->notifier);
if (rc)
kfree(trigger_data);
--
2.34.1
