generic: add hack for MT753x LED configuration

This adds a small hack similar to the one used for ar8xxx switches to
read a reg:value map for configuring the LED configuration registers.

This allows OpenWrt to write device-specific LED action as well as blink
configurations. It is unlikely to be accepted upstream, as upstream
plans on integrating their own framework for handling these LEDs.

Signed-off-by: David Bauer <mail@david-bauer.net>

1 files changed, 66 insertions, 0 deletions

diff --git a/target/linux/generic/hack-5.15/766-net-phy-mediatek-ge-add-LED-configuration-interface.patch b/target/linux/generic/hack-5.15/766-net-phy-mediatek-ge-add-LED-configuration-interface.patch
new file mode 100644
index 0000000000..a69ec97ca3
--- /dev/null
+++ b/target/linux/generic/hack-5.15/766-net-phy-mediatek-ge-add-LED-configuration-interface.patch
@@ -0,0 +1,66 @@
+From cc225d163b5a4f7a0d1968298bf7927306646a47 Mon Sep 17 00:00:00 2001
+From: David Bauer <mail@david-bauer.net>
+Date: Fri, 28 Apr 2023 01:53:01 +0200
+Subject: [PATCH] net: phy: mediatek-ge: add LED configuration interface
+
+This adds a small hack similar to the one used for ar8xxx switches to
+read a reg:value map for configuring the LED configuration registers.
+
+This allows OpenWrt to write device-specific LED action as well as blink
+configurations. It is unlikely to be accepted upstream, as upstream
+plans on integrating their own framework for handling these LEDs.
+
+Signed-off-by: David Bauer <mail@david-bauer.net>
+---
+ drivers/net/phy/mediatek-ge.c | 33 +++++++++++++++++++++++++++++++++
+ 1 file changed, 33 insertions(+)
+
+--- a/drivers/net/phy/mediatek-ge.c
++++ b/drivers/net/phy/mediatek-ge.c
+@@ -53,6 +53,36 @@ static int mt7530_phy_config_init(struct
+ 	return 0;
+ }
+ 
++static int mt7530_led_config_of(struct phy_device *phydev)
++{
++	struct device_node *np = phydev->mdio.dev.of_node;
++	const __be32 *paddr;
++	int len;
++	int i;
++
++	paddr = of_get_property(np, "mediatek,led-config", &len);
++	if (!paddr)
++		return 0;
++
++	if (len < (2 * sizeof(*paddr)))
++		return -EINVAL;
++
++	len /= sizeof(*paddr);
++
++	phydev_warn(phydev, "Configure LED registers (num=%d)\n", len);
++	for (i = 0; i < len - 1; i += 2) {
++		u32 reg;
++		u32 val;
++
++		reg = be32_to_cpup(paddr + i);
++		val = be32_to_cpup(paddr + i + 1);
++
++		phy_write_mmd(phydev, MDIO_MMD_VEND2, reg, val);
++	}
++
++	return 0;
++}
++
+ static int mt7531_phy_config_init(struct phy_device *phydev)
+ {
+ 	mtk_gephy_config_init(phydev);
+@@ -65,6 +95,9 @@ static int mt7531_phy_config_init(struct
+ 	phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x13, 0x404);
+ 	phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x14, 0x404);
+ 
++	/* LED Config*/
++	mt7530_led_config_of(phydev);
++
+ 	return 0;
+ }
+