netdev - Re: [PATCH v2 net-next 7/9] lan743x: Add EEE support

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Date:   Fri, 13 Jul 2018 00:49:05 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Bryan Whitehead <Bryan.Whitehead@...rochip.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        UNGLinuxDriver@...rochip.com, richardcochran@...il.com
Subject: Re: [PATCH v2 net-next 7/9] lan743x: Add EEE support

> +static int lan743x_ethtool_set_eee(struct net_device *netdev,
> +				   struct ethtool_eee *eee)
> +{
> +	struct lan743x_adapter *adapter = netdev_priv(netdev);
> +	struct phy_device *phydev = NULL;
> +	u32 buf = 0;
> +	int ret = 0;
> +
> +	if (!netdev)
> +		return -EINVAL;
> +	adapter = netdev_priv(netdev);
> +	if (!adapter)
> +		return -EINVAL;
> +	phydev = netdev->phydev;
> +	if (!phydev)
> +		return -EIO;
> +	if (!phydev->drv) {
> +		netif_err(adapter, drv, adapter->netdev,
> +			  "Missing PHY Driver\n");
> +		return -EIO;
> +	}
> +
> +	if (eee->eee_enabled) {
> +		ret = phy_init_eee(phydev, 0);
> +		if (ret) {
> +			netif_err(adapter, drv, adapter->netdev,
> +				  "EEE initialization failed\n");
> +			return ret;
> +		}
> +
> +		buf = lan743x_csr_read(adapter, MAC_CR);
> +		buf |= MAC_CR_EEE_EN_;
> +		lan743x_csr_write(adapter, MAC_CR, buf);
> +
> +		phy_ethtool_set_eee(phydev, eee);
> +
> +		buf = (u32)eee->tx_lpi_timer;
> +		lan743x_csr_write(adapter, MAC_EEE_TX_LPI_REQ_DLY_CNT, buf);
> +		netif_info(adapter, drv, adapter->netdev, "Enabled EEE\n");
> +	} else {
> +		buf = lan743x_csr_read(adapter, MAC_CR);
> +		buf &= ~MAC_CR_EEE_EN_;
> +		lan743x_csr_write(adapter, MAC_CR, buf);
> +		netif_info(adapter, drv, adapter->netdev, "Disabled EEE\n");
> +	}
> +

Hi Bryan

You should call phy_ethtool_set_eee() in both cases, so that it gets
disabled in the PHY as well. It needs to stop advertising it.

       Andrew