netdev - [PATCH 5/9] stmmac: support wake up irq from external sources

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Message-Id: <1314259229-13767-6-git-send-email-peppe.cavallaro@st.com>
Date:	Thu, 25 Aug 2011 10:00:25 +0200
From:	Giuseppe CAVALLARO <peppe.cavallaro@...com>
To:	netdev@...r.kernel.org
Cc:	Deepak Sikri <deepak.sikri@...com>,
	Giuseppe Cavallaro <peppe.cavallaro@...com>
Subject: [PATCH 5/9] stmmac: support wake up irq from external sources

From: Deepak Sikri <deepak.sikri@...com>

On some platforms e.g. SPEAr the wake up irq differs from the
GMAC interrupt source.
With this patch an external wake up irq can be passed through the
platform code and named as "eth_wake_irq".

In case the wake up interrupt is not passed from the platform
so the driver will continue to use the mac irq (ndev->irq)

Signed-off-by: Deepak Sikri <deepak.sikri@...com>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@...com>
---
 drivers/net/stmmac/stmmac.h         |    1 +
 drivers/net/stmmac/stmmac_ethtool.c |    4 ++--
 drivers/net/stmmac/stmmac_main.c    |   14 +++++++++++++-
 3 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/net/stmmac/stmmac.h b/drivers/net/stmmac/stmmac.h
index bccf1f1..f86ea87 100644
--- a/drivers/net/stmmac/stmmac.h
+++ b/drivers/net/stmmac/stmmac.h
@@ -73,6 +73,7 @@ struct stmmac_priv {
 	spinlock_t lock;
 	int wolopts;
 	int wolenabled;
+	int wol_irq;
 #ifdef CONFIG_STMMAC_TIMER
 	struct stmmac_timer *tm;
 #endif
diff --git a/drivers/net/stmmac/stmmac_ethtool.c b/drivers/net/stmmac/stmmac_ethtool.c
index 7ed8fb6..79df79d 100644
--- a/drivers/net/stmmac/stmmac_ethtool.c
+++ b/drivers/net/stmmac/stmmac_ethtool.c
@@ -321,10 +321,10 @@ static int stmmac_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
 	if (wol->wolopts) {
 		pr_info("stmmac: wakeup enable\n");
 		device_set_wakeup_enable(priv->device, 1);
-		enable_irq_wake(dev->irq);
+		enable_irq_wake(priv->wol_irq);
 	} else {
 		device_set_wakeup_enable(priv->device, 0);
-		disable_irq_wake(dev->irq);
+		disable_irq_wake(priv->wol_irq);
 	}
 
 	spin_lock_irq(&priv->lock);
diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c
index 50fe89f..5b20e1b 100644
--- a/drivers/net/stmmac/stmmac_main.c
+++ b/drivers/net/stmmac/stmmac_main.c
@@ -1845,7 +1845,7 @@ static int stmmac_mac_device_setup(struct net_device *dev)
 
 	if (device_can_wakeup(priv->device)) {
 		priv->wolopts = WAKE_MAGIC; /* Magic Frame as default */
-		enable_irq_wake(dev->irq);
+		enable_irq_wake(priv->wol_irq);
 	}
 
 	return 0;
@@ -1918,6 +1918,18 @@ static int stmmac_dvr_probe(struct platform_device *pdev)
 		pr_info("\tPMT module supported\n");
 		device_set_wakeup_capable(&pdev->dev, 1);
 	}
+	/*
+	 * On some platforms e.g. SPEAr the wake up irq differs from the mac irq
+	 * The external wake up irq can be passed through the platform code
+	 * named as "eth_wake_irq"
+	 *
+	 * In case the wake up interrupt is not passed from the platform
+	 * so the driver will continue to use the mac irq (ndev->irq)
+	 */
+	priv->wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
+	if (priv->wol_irq == -ENXIO)
+		priv->wol_irq = ndev->irq;
+
 
 	platform_set_drvdata(pdev, ndev);
 
-- 
1.7.4.4

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