netdev - [PATCH v4 5/6] net: phy: at803x: Add qca8084_config

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Date: Thu, 16 Nov 2023 19:24:36 +0800
From: Luo Jie <quic_luoj@...cinc.com>
To: <andrew@...n.ch>, <davem@...emloft.net>, <edumazet@...gle.com>,
        <kuba@...nel.org>, <pabeni@...hat.com>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <hkallweit1@...il.com>, <linux@...linux.org.uk>, <corbet@....net>
CC: <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>
Subject: [PATCH v4 5/6] net: phy: at803x: Add qca8084_config_init function

Configure MSE detect threshold and ADC clock edge invert.

Signed-off-by: Luo Jie <quic_luoj@...cinc.com>
---
 drivers/net/phy/at803x.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index f56202f5944d..06a068ca5539 100644
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -280,6 +280,15 @@
 #define QCA8081_PHY_SERDES_MMD1_FIFO_CTRL	0x9072
 #define QCA8081_PHY_FIFO_RSTN			BIT(11)
 
+/* QCA8084 ADC clock edge */
+#define QCA8084_ADC_CLK_SEL			0x8b80
+#define QCA8084_ADC_CLK_SEL_ACLK		GENMASK(7, 4)
+#define QCA8084_ADC_CLK_SEL_ACLK_FALL		0xf
+#define QCA8084_ADC_CLK_SEL_ACLK_RISE		0x0
+
+#define QCA8084_MSE_THRESHOLD			0x800a
+#define QCA8084_MSE_THRESHOLD_2P5G_VAL		0x51c6
+
 MODULE_DESCRIPTION("Qualcomm Atheros AR803x and QCA808X PHY driver");
 MODULE_AUTHOR("Matus Ujhelyi");
 MODULE_LICENSE("GPL");
@@ -2083,6 +2092,23 @@ static void qca808x_link_change_notify(struct phy_device *phydev)
 			QCA8081_PHY_FIFO_RSTN, phydev->link ? QCA8081_PHY_FIFO_RSTN : 0);
 }
 
+static int qca8084_config_init(struct phy_device *phydev)
+{
+	int ret;
+
+	/* Invert ADC clock edge */
+	ret = at803x_debug_reg_mask(phydev, QCA8084_ADC_CLK_SEL,
+				    QCA8084_ADC_CLK_SEL_ACLK,
+				    FIELD_PREP(QCA8084_ADC_CLK_SEL_ACLK,
+					       QCA8084_ADC_CLK_SEL_ACLK_FALL));
+	if (ret < 0)
+		return ret;
+
+	/* Adjust MSE threshold value to avoid link issue with some link partner */
+	return phy_write_mmd(phydev, MDIO_MMD_PMAPMD,
+			     QCA8084_MSE_THRESHOLD, QCA8084_MSE_THRESHOLD_2P5G_VAL);
+}
+
 static struct phy_driver at803x_driver[] = {
 {
 	/* Qualcomm Atheros AR8035 */
@@ -2280,6 +2306,7 @@ static struct phy_driver at803x_driver[] = {
 	.soft_reset		= qca808x_soft_reset,
 	.cable_test_start	= qca808x_cable_test_start,
 	.cable_test_get_status	= qca808x_cable_test_get_status,
+	.config_init		= qca8084_config_init,
 }, };
 
 module_phy_driver(at803x_driver);
-- 
2.42.0