netdev - [PATCH net-next 2/3] net: phy: microchip_t1: Enable GPIO pins specific to lan887x phy for PEROUT signals

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Message-ID: <20250103090731.1355-3-divya.koppera@microchip.com>
Date: Fri, 3 Jan 2025 14:37:30 +0530
From: Divya Koppera <divya.koppera@...rochip.com>
To: <andrew@...n.ch>, <arun.ramadoss@...rochip.com>,
	<UNGLinuxDriver@...rochip.com>, <hkallweit1@...il.com>,
	<linux@...linux.org.uk>, <davem@...emloft.net>, <edumazet@...gle.com>,
	<kuba@...nel.org>, <pabeni@...hat.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <richardcochran@...il.com>,
	<vadim.fedorenko@...ux.dev>
Subject: [PATCH net-next 2/3] net: phy: microchip_t1: Enable GPIO pins specific to lan887x phy for PEROUT signals

Adds support for enabling GPIO pins that are required
to generate periodic output signals on lan887x phy.

Signed-off-by: Divya Koppera <divya.koppera@...rochip.com>
---
 drivers/net/phy/microchip_t1.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/net/phy/microchip_t1.c b/drivers/net/phy/microchip_t1.c
index 73f28463bc35..b0a34f794f4c 100644
--- a/drivers/net/phy/microchip_t1.c
+++ b/drivers/net/phy/microchip_t1.c
@@ -273,6 +273,11 @@
 /* End offset of samples */
 #define SQI_INLIERS_END (SQI_INLIERS_START + SQI_INLIERS_NUM)
 
+#define LAN887X_MX_CHIP_TOP_REG_CONTROL1		(0xF002)
+#define LAN887X_MX_CHIP_TOP_REG_CONTROL1_EVT_EN		BIT(8)
+#define LAN887X_MX_CHIP_TOP_REG_CONTROL1_REF_CLK	BIT(9)
+#define LAN887X_MX_CHIP_TOP_REG_CONTROL1_GPIO2_EN	BIT(5)
+
 #define DRIVER_AUTHOR	"Nisar Sayed <nisar.sayed@...rochip.com>"
 #define DRIVER_DESC	"Microchip LAN87XX/LAN937x/LAN887x T1 PHY driver"
 
@@ -1286,6 +1291,19 @@ static int lan887x_phy_init(struct phy_device *phydev)
 		if (IS_ERR(priv->clock))
 			return PTR_ERR(priv->clock);
 
+		/* Enable pin mux for GPIO 2(EVT B) as ref clk */
+		/* Enable pin mux for EVT A */
+		phy_modify_mmd(phydev, MDIO_MMD_VEND1,
+			       LAN887X_MX_CHIP_TOP_REG_CONTROL1,
+			       LAN887X_MX_CHIP_TOP_REG_CONTROL1_REF_CLK |
+			       LAN887X_MX_CHIP_TOP_REG_CONTROL1_EVT_EN,
+			       LAN887X_MX_CHIP_TOP_REG_CONTROL1_REF_CLK |
+			       LAN887X_MX_CHIP_TOP_REG_CONTROL1_EVT_EN);
+
+		 /* Initialize pin numbers specific to PEROUT */
+		priv->clock->gpio_event_a = 3;
+		priv->clock->gpio_event_b = 1;
+
 		priv->init_done = true;
 	}
 
-- 
2.17.1