net: phy: microchip_t1: Enable pin out specific to lan887x phy for PEROUT signal

Adds support for enabling pin out that is required
to generate periodic output signal on lan887x phy.

Signed-off-by: Divya Koppera <divya.koppera@microchip.com>
Link: https://patch.msgid.link/20250115090634.12941-3-divya.koppera@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: Divya-Koppera

drivers/net/phy/microchip_t1.c

@@ -238,6 +238,9 @@
 #define LAN887X_INT_MSK_LINK_UP_MSK		BIT(1)
 #define LAN887X_INT_MSK_LINK_DOWN_MSK		BIT(0)
 
+#define LAN887X_MX_CHIP_TOP_REG_CONTROL1	0xF002
+#define LAN887X_MX_CHIP_TOP_REG_CONTROL1_EVT_EN	BIT(8)
+
 #define LAN887X_MX_CHIP_TOP_LINK_MSK	(LAN887X_INT_MSK_LINK_UP_MSK |\
 					 LAN887X_INT_MSK_LINK_DOWN_MSK)
 
@@ -1286,6 +1289,15 @@ static int lan887x_phy_init(struct phy_device *phydev)
 		if (IS_ERR(priv->clock))
 			return PTR_ERR(priv->clock);
 
+		/* Enable pin mux for EVT */
+		phy_modify_mmd(phydev, MDIO_MMD_VEND1,
+			       LAN887X_MX_CHIP_TOP_REG_CONTROL1,
+			       LAN887X_MX_CHIP_TOP_REG_CONTROL1_EVT_EN,
+			       LAN887X_MX_CHIP_TOP_REG_CONTROL1_EVT_EN);
+
+		/* Initialize pin numbers specific to PEROUT */
+		priv->clock->event_pin = 3;
+
 		priv->init_done = true;
 	}
 
@@ -2154,7 +2166,7 @@ static struct phy_driver microchip_t1_phy_driver[] = {
 
 module_phy_driver(microchip_t1_phy_driver);
 
-static const struct mdio_device_id __maybe_unused microchip_t1_tbl[] = {
+static struct mdio_device_id __maybe_unused microchip_t1_tbl[] = {
 	{ PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX) },
 	{ PHY_ID_MATCH_MODEL(PHY_ID_LAN937X) },
 	{ PHY_ID_MATCH_MODEL(PHY_ID_LAN887X) },