generic: backport initial LEDs hw control support

Backport initial LEDs hw control support. Currently this is limited to
only rx/tx and link events for the netdev trigger but the API got
accepted and the additional modes are working on and will be backported
later.

Refresh every patch and add the additional config flag for QCA8K new
LEDs support.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 0a4b309f41062ef40706162ae53b6428982a0685)

1 files changed, 97 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.15/815-v6.4-06-net-phy-phy_device-Call-into-the-PHY-driver-to-set-L.patch b/target/linux/generic/backport-5.15/815-v6.4-06-net-phy-phy_device-Call-into-the-PHY-driver-to-set-L.patch
new file mode 100644
index 0000000000..f990557cc7
--- /dev/null
+++ b/target/linux/generic/backport-5.15/815-v6.4-06-net-phy-phy_device-Call-into-the-PHY-driver-to-set-L.patch
@@ -0,0 +1,97 @@
+From 684818189b04b095b34964ed4a3ea5249a840eab Mon Sep 17 00:00:00 2001
+From: Andrew Lunn <andrew@lunn.ch>
+Date: Mon, 17 Apr 2023 17:17:28 +0200
+Subject: [PATCH 6/9] net: phy: phy_device: Call into the PHY driver to set LED
+ brightness
+
+Linux LEDs can be software controlled via the brightness file in /sys.
+LED drivers need to implement a brightness_set function which the core
+will call. Implement an intermediary in phy_device, which will call
+into the phy driver if it implements the necessary function.
+
+Signed-off-by: Andrew Lunn <andrew@lunn.ch>
+Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/phy/phy_device.c | 15 ++++++++++++---
+ include/linux/phy.h          | 13 +++++++++++++
+ 2 files changed, 25 insertions(+), 3 deletions(-)
+
+--- a/drivers/net/phy/phy_device.c
++++ b/drivers/net/phy/phy_device.c
+@@ -2945,11 +2945,18 @@ static bool phy_drv_supports_irq(struct
+ 	return phydrv->config_intr && phydrv->handle_interrupt;
+ }
+ 
+-/* Dummy implementation until calls into PHY driver are added */
+ static int phy_led_set_brightness(struct led_classdev *led_cdev,
+ 				  enum led_brightness value)
+ {
+-	return 0;
++	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_brightness_set(phydev, phyled->index, value);
++	mutex_unlock(&phydev->lock);
++
++	return err;
+ }
+ 
+ static int of_phy_led(struct phy_device *phydev,
+@@ -2966,12 +2973,14 @@ static int of_phy_led(struct phy_device
+ 		return -ENOMEM;
+ 
+ 	cdev = &phyled->led_cdev;
++	phyled->phydev = phydev;
+ 
+ 	err = of_property_read_u8(led, "reg", &phyled->index);
+ 	if (err)
+ 		return err;
+ 
+-	cdev->brightness_set_blocking = phy_led_set_brightness;
++	if (phydev->drv->led_brightness_set)
++		cdev->brightness_set_blocking = phy_led_set_brightness;
+ 	cdev->max_brightness = 1;
+ 	init_data.devicename = dev_name(&phydev->mdio.dev);
+ 	init_data.fwnode = of_fwnode_handle(led);
+--- a/include/linux/phy.h
++++ b/include/linux/phy.h
+@@ -745,15 +745,19 @@ struct phy_tdr_config {
+  * struct phy_led: An LED driven by the PHY
+  *
+  * @list: List of LEDs
++ * @phydev: PHY this LED is attached to
+  * @led_cdev: Standard LED class structure
+  * @index: Number of the LED
+  */
+ struct phy_led {
+ 	struct list_head list;
++	struct phy_device *phydev;
+ 	struct led_classdev led_cdev;
+ 	u8 index;
+ };
+ 
++#define to_phy_led(d) container_of(d, struct phy_led, led_cdev)
++
+ /**
+  * struct phy_driver - Driver structure for a particular PHY type
+  *
+@@ -953,6 +957,15 @@ struct phy_driver {
+ 	int (*get_sqi)(struct phy_device *dev);
+ 	/** @get_sqi_max: Get the maximum signal quality indication */
+ 	int (*get_sqi_max)(struct phy_device *dev);
++
++	/**
++	 * @led_brightness_set: Set a PHY LED brightness. Index
++	 * indicates which of the PHYs led should be set. Value
++	 * follows the standard LED class meaning, e.g. LED_OFF,
++	 * LED_HALF, LED_FULL.
++	 */
++	int (*led_brightness_set)(struct phy_device *dev,
++				  u8 index, enum led_brightness value);
+ };
+ #define to_phy_driver(d) container_of(to_mdio_common_driver(d),		\
+ 				      struct phy_driver, mdiodrv)