diff mbox series

[v7,08/11] leds: trigger: netdev: add available mode sysfs attr

Message ID 20221214235438.30271-9-ansuelsmth@gmail.com
State New
Headers show
Series [v7,01/11] leds: add support for hardware driven LEDs | expand

Commit Message

Christian Marangi Dec. 14, 2022, 11:54 p.m. UTC
Add avaiable_mode sysfs attr to show and give some details about the
supported modes and how they can be handled by the trigger.
This is in preparation for hardware only modes that doesn't support
software fallback.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/leds/trigger/ledtrig-netdev.c | 32 +++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
diff mbox series

Patch

diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c
index a471e0cde836..3a3b77bb41fb 100644
--- a/drivers/leds/trigger/ledtrig-netdev.c
+++ b/drivers/leds/trigger/ledtrig-netdev.c
@@ -33,6 +33,8 @@ 
  *         (has carrier) or not
  * tx -  LED blinks on transmitted data
  * rx -  LED blinks on receive data
+ * available_mode - Display available mode and how they can be handled
+ *                  by the LED
  *
  */
 
@@ -370,12 +372,42 @@  static ssize_t interval_store(struct device *dev,
 
 static DEVICE_ATTR_RW(interval);
 
+static ssize_t available_mode_show(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
+	struct netdev_led_attr_detail *detail;
+	int i, len = 0;
+
+	for (i = 0; i < ARRAY_SIZE(attr_details); i++) {
+		detail = &attr_details[i];
+
+		if (led_trigger_blink_mode_is_supported(trigger_data->led_cdev, detail->bit)) {
+			if (!trigger_data->net_dev) {
+				if (detail->hardware_only)
+					len += sprintf(buf + len, "%s [hardware]\n",
+						       detail->name);
+				else
+					len += sprintf(buf + len, "%s [software-hardware]\n",
+						       detail->name);
+			}
+		} else {
+			len += sprintf(buf + len, "%s [software]\n", detail->name);
+		}
+	}
+
+	return len;
+}
+
+static DEVICE_ATTR_RO(available_mode);
+
 static struct attribute *netdev_trig_attrs[] = {
 	&dev_attr_device_name.attr,
 	&dev_attr_link.attr,
 	&dev_attr_rx.attr,
 	&dev_attr_tx.attr,
 	&dev_attr_interval.attr,
+	&dev_attr_available_mode.attr,
 	NULL
 };
 ATTRIBUTE_GROUPS(netdev_trig);