netdev - [PATCH/RFC net-next 2/5] ravb: correct ptp does failure after suspend and resume

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Date:   Tue, 17 Apr 2018 10:50:27 +0200
From:   Simon Horman <horms+renesas@...ge.net.au>
To:     Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:     Magnus Damm <magnus.damm@...il.com>, netdev@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Kazuya Mizuguchi <kazuya.mizuguchi.ks@...esas.com>,
        Simon Horman <horms+renesas@...ge.net.au>
Subject: [PATCH/RFC net-next 2/5] ravb: correct ptp does failure after suspend and resume

From: Kazuya Mizuguchi <kazuya.mizuguchi.ks@...esas.com>

This patch fixes the problem that ptp4l command does not work after
suspend and resume.
Add the initial setting in ravb_suspend() and ravb_resume(),
because ptp does not work.

Fixes: a0d2f20650e8 ("Renesas Ethernet AVB PTP clock driver")
Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@...esas.com>
Signed-off-by: Simon Horman <horms+renesas@...ge.net.au>
---
 drivers/net/ethernet/renesas/ravb_main.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index b311b1ac1286..dbde3d11458b 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2295,6 +2295,9 @@ static int __maybe_unused ravb_suspend(struct device *dev)
 	else
 		ret = ravb_close(ndev);
 
+	if (priv->chip_id != RCAR_GEN2)
+		ravb_ptp_stop(ndev);
+
 	return ret;
 }
 
@@ -2302,6 +2305,7 @@ static int __maybe_unused ravb_resume(struct device *dev)
 {
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct ravb_private *priv = netdev_priv(ndev);
+	struct platform_device *pdev = priv->pdev;
 	int ret = 0;
 
 	/* If WoL is enabled set reset mode to rearm the WoL logic */
@@ -2330,6 +2334,9 @@ static int __maybe_unused ravb_resume(struct device *dev)
 	/* Restore descriptor base address table */
 	ravb_write(ndev, priv->desc_bat_dma, DBAT);
 
+	if (priv->chip_id != RCAR_GEN2)
+		ravb_ptp_init(ndev, pdev);
+
 	if (netif_running(ndev)) {
 		if (priv->wol_enabled) {
 			ret = ravb_wol_restore(ndev);
-- 
2.11.0