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

From: Revanth Kumar Uppala <ruppala@nvidia.com>
To: <linux@armlinux.org.uk>, <andrew@lunn.ch>, <hkallweit1@gmail.com>,
	<netdev@vger.kernel.org>
Cc: <linux-tegra@vger.kernel.org>,
	Revanth Kumar Uppala <ruppala@nvidia.com>,
	Narayan Reddy <narayanr@nvidia.com>
Subject: [PATCH 2/4] net: phy: aquantia: Enable MAC Controlled EEE
Date: Wed, 28 Jun 2023 18:13:24 +0530	[thread overview]
Message-ID: <20230628124326.55732-2-ruppala@nvidia.com> (raw)
In-Reply-To: <20230628124326.55732-1-ruppala@nvidia.com>

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@nvidia.com>
Signed-off-by: Revanth Kumar Uppala <ruppala@nvidia.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

