netdev - [PATCH 2/4] net: phy: aquantia: Enable MAC Controlled EEE

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Date:   Wed, 28 Jun 2023 18:13:24 +0530
From:   Revanth Kumar Uppala <ruppala@...dia.com>
To:     <linux@...linux.org.uk>, <andrew@...n.ch>, <hkallweit1@...il.com>,
        <netdev@...r.kernel.org>
CC:     <linux-tegra@...r.kernel.org>,
        Revanth Kumar Uppala <ruppala@...dia.com>,
        Narayan Reddy <narayanr@...dia.com>
Subject: [PATCH 2/4] net: phy: aquantia: Enable MAC Controlled EEE

Enable MAC controlled energy efficient ethernet (EEE) so that MAC can
keep the PHY in EEE sleep mode when link utilization is low to reduce
energy consumption.

Signed-off-by: Narayan Reddy <narayanr@...dia.com>
Signed-off-by: Revanth Kumar Uppala <ruppala@...dia.com>
---
 drivers/net/phy/aquantia_main.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/net/phy/aquantia_main.c b/drivers/net/phy/aquantia_main.c
index c99b9d066463..faca2a0b1d49 100644
--- a/drivers/net/phy/aquantia_main.c
+++ b/drivers/net/phy/aquantia_main.c
@@ -28,6 +28,9 @@
 
 #define MDIO_AN_ADVT		0x0010
 
+#define VEND1_SEC_INGRESS_CNTRL_REG1    0x7001
+#define MAC_CNTRL_EEE		(BIT(8) | BIT(12))
+
 #define MDIO_PHYXS_VEND_IF_STATUS		0xe812
 #define MDIO_PHYXS_VEND_IF_STATUS_TYPE_MASK	GENMASK(7, 3)
 #define MDIO_PHYXS_VEND_IF_STATUS_TYPE_KR	0
@@ -596,6 +599,12 @@ static int aqr107_config_init(struct phy_device *phydev)
 	if (ret < 0)
 		return ret;
 
+	/* Enable MAC Controlled EEE */
+	ret = phy_write_mmd(phydev, MDIO_MMD_VEND1,
+			    VEND1_SEC_INGRESS_CNTRL_REG1, MAC_CNTRL_EEE);
+	if (ret < 0)
+		return ret;
+
 	return aqr107_set_downshift(phydev, MDIO_AN_VEND_PROV_DOWNSHIFT_DFLT);
 }
 
-- 
2.17.1