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>

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 (file)
index 0000000..a69ec97
--- /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;
+ }
+