[PATCH net-next 2/3] net: fec: add support to select wakeup irq source

[Joakim Zhang]

The FEC driver default treats irq[0] as wakeup source, but this situation
changed on i.MX8M SoCs, this patch adds support to select wakeup irq
source with "fsl,wakeup-irq" property.

Signed-off-by: Fugang Duan <fugang.duan@xxxxxxx>
Signed-off-by: Joakim Zhang <qiangqing.zhang@xxxxxxx>
---
 drivers/net/ethernet/freescale/fec.h      |  1 +
 drivers/net/ethernet/freescale/fec_main.c | 15 +++++++++++----
 2 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h
index ae3259164395..fe4dfe2d25ea 100644
--- a/drivers/net/ethernet/freescale/fec.h
+++ b/drivers/net/ethernet/freescale/fec.h
@@ -578,6 +578,7 @@ struct fec_enet_private {
 	bool	bufdesc_ex;
 	int	pause_flag;
 	int	wol_flag;
+	int     wake_irq;
 	u32	quirks;
 
 	struct	napi_struct napi;
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 1201c13afa6f..c422a309d33c 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -2878,12 +2878,12 @@ fec_enet_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
 	device_set_wakeup_enable(&ndev->dev, wol->wolopts & WAKE_MAGIC);
 	if (device_may_wakeup(&ndev->dev)) {
 		fep->wol_flag |= FEC_WOL_FLAG_ENABLE;
-		if (fep->irq[0] > 0)
-			enable_irq_wake(fep->irq[0]);
+		if (fep->wake_irq > 0)
+			enable_irq_wake(fep->wake_irq);
 	} else {
 		fep->wol_flag &= (~FEC_WOL_FLAG_ENABLE);
-		if (fep->irq[0] > 0)
-			disable_irq_wake(fep->irq[0]);
+		if (fep->wake_irq > 0)
+			disable_irq_wake(fep->wake_irq);
 	}
 
 	return 0;
@@ -3935,6 +3935,13 @@ fec_probe(struct platform_device *pdev)
 		fep->irq[i] = irq;
 	}
 
+	/* Get wakeup irq */
+	ret = of_property_read_u32(np, "fsl,wakeup-irq", &irq);
+	if (!ret && irq >= 0 && irq < irq_cnt)
+		fep->wake_irq = fep->irq[irq];
+	else
+		fep->wake_irq = fep->irq[0];
+
 	ret = fec_enet_mii_init(pdev);
 	if (ret)
 		goto failed_mii_init;
-- 
2.17.1