netdev - [PATCH net-next 10/11] net: bcmgenet: suspend and resume from Wake-on-LAN

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Date:	Thu, 10 Jul 2014 15:46:23 -0700
From:	Florian Fainelli <f.fainelli@...il.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, Florian Fainelli <f.fainelli@...il.com>
Subject: [PATCH net-next 10/11] net: bcmgenet: suspend and resume from Wake-on-LAN

Update bcmgenet_suspend() to prepare the hardware for being put into
Wake-on-LAN mode if the device can wakeup the system, and Wake-on-LAN is
enabled. Whether we resume from Wake-on-LAN or not, make sure that
bcmgenet_resume() disables the UniMAC MagicPacket matching mode and puts
the hardware in a state where it can receive all incoming packets.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 5b2b9c546ee7..e80afa3cc321 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -2639,6 +2639,12 @@ static int bcmgenet_suspend(struct device *d)
 	bcmgenet_tx_reclaim_all(dev);
 	bcmgenet_fini_dma(priv);
 
+	/* Prepare the device for Wake-on-LAN and switch to the slow clock */
+	if (device_may_wakeup(d) && priv->wolopts) {
+		bcmgenet_power_down(priv, GENET_POWER_WOL_MAGIC);
+		clk_prepare_enable(priv->clk_wol);
+	}
+
 	/* Turn off the clocks */
 	clk_disable_unprepare(priv->clk);
 
@@ -2667,6 +2673,12 @@ static int bcmgenet_resume(struct device *d)
 	if (ret)
 		goto out_clk_disable;
 
+	if (priv->wolopts)
+		ret = bcmgenet_wol_resume(priv);
+
+	if (ret)
+		goto out_clk_disable;
+
 	/* disable ethernet MAC while updating its registers */
 	umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, 0);
 
-- 
1.9.1

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