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Commit 83bf79b6 authored by Giuseppe CAVALLARO's avatar Giuseppe CAVALLARO Committed by David S. Miller
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stmmac: disable at run-time the EEE if not supported 



This patch is to disable the EEE (so HW and timers)
for example when the phy communicates that the EEE
can be supported anymore.

Signed-off-by: default avatarGiuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d25f06ea

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

+19 −4
Original line number Diff line number Diff line
@@ -286,10 +286,25 @@ bool stmmac_eee_init(struct stmmac_priv *priv) 


	/* MAC core supports the EEE feature. */

	if (priv->dma_cap.eee) {

		int tx_lpi_timer = priv->tx_lpi_timer;



		/* Check if the PHY supports EEE */

		if (phy_init_eee(priv->phydev, 1))

		if (phy_init_eee(priv->phydev, 1)) {

			/* To manage at run-time if the EEE cannot be supported

			 * anymore (for example because the lp caps have been

			 * changed).

			 * In that case the driver disable own timers.

			 */

			if (priv->eee_active) {

				pr_debug("stmmac: disable EEE\n");

				del_timer_sync(&priv->eee_ctrl_timer);

				priv->hw->mac->set_eee_timer(priv->ioaddr, 0,

							     tx_lpi_timer);

			}

			priv->eee_active = 0;

			goto out;



		}

		/* Activate the EEE and start timers */

		if (!priv->eee_active) {

			priv->eee_active = 1;

			init_timer(&priv->eee_ctrl_timer);
@@ -300,13 +315,13 @@ bool stmmac_eee_init(struct stmmac_priv *priv) 


			priv->hw->mac->set_eee_timer(priv->ioaddr,

						     STMMAC_DEFAULT_LIT_LS,

						     priv->tx_lpi_timer);

						     tx_lpi_timer);

		} else

			/* Set HW EEE according to the speed */

			priv->hw->mac->set_eee_pls(priv->ioaddr,

						   priv->phydev->link);



		pr_info("stmmac: Energy-Efficient Ethernet initialized\n");

		pr_debug("stmmac: Energy-Efficient Ethernet initialized\n");



		ret = true;

	}