Subject: [net-next PATCH v4 07/14] net: phy: phy_device: Call into the PHY driver to set LED blinking

From: Christian Marangi <[email-masked]>
Date: Fri, 17 Mar 2023 03:31:18 +0100

From: Andrew Lunn <[email-masked]>

Linux LEDs can be requested to perform hardware accelerated
blinking. Pass this to the PHY driver, if it implements the op.

Signed-off-by: Andrew Lunn <[email-masked]>
Signed-off-by: Christian Marangi <[email-masked]>
---
 drivers/net/phy/phy_device.c | 18 ++++++++++++++++++
 include/linux/phy.h          |  8 ++++++++
 2 files changed, 26 insertions(+)

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index c7312a9e820d..b4be02a21bb8 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -2981,6 +2981,22 @@ static int phy_led_set_brightness(struct led_classdev *led_cdev,
 	return err;
 }
 
+static int phy_led_blink_set(struct led_classdev *led_cdev,
+			     unsigned long *delay_on,
+			     unsigned long *delay_off)
+{
+	struct phy_led *phyled = to_phy_led(led_cdev);
+	struct phy_device *phydev = phyled->phydev;
+	int err;
+
+	mutex_lock(&phydev->lock);
+	err = phydev->drv->led_blink_set(phydev, phyled->index,
+					 delay_on, delay_off);
+	mutex_unlock(&phydev->lock);
+
+	return err;
+}
+
 static int of_phy_led(struct phy_device *phydev,
 		      struct device_node *led)
 {
@@ -3003,6 +3019,8 @@ static int of_phy_led(struct phy_device *phydev,
 
 	if (phydev->drv->led_brightness_set)
 		cdev->brightness_set_blocking = phy_led_set_brightness;
+	if (phydev->drv->led_blink_set)
+		cdev->blink_set = phy_led_blink_set;
 	cdev->max_brightness = 1;
 	init_data.devicename = dev_name(&phydev->mdio.dev);
 	init_data.fwnode = of_fwnode_handle(led);
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 94fd21d5e145..58cb44960573 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -1074,6 +1074,14 @@ struct phy_driver {
 	 */
 	int (*led_brightness_set)(struct phy_device *dev,
 				  u32 index, enum led_brightness value);
+	/* Activate hardware accelerated blink, delays are in milliseconds
+	 * and if both are zero then a sensible default should be chosen.
+	 * The call should adjust the timings in that case and if it can't
+	 * match the values specified exactly.
+	 */
+	int (*led_blink_set)(struct phy_device *dev, u32 index,
+			     unsigned long *delay_on,
+			     unsigned long *delay_off);
 };
 #define to_phy_driver(d) container_of(to_mdio_common_driver(d),		\
 				      struct phy_driver, mdiodrv)
-- 
2.39.2