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From: Scott Branden <scott.branden@broadcom.com>
To: Andrew Lunn <andrew@lunn.ch>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Heiner Kallweit <hkallweit1@gmail.com>
Cc: Scott Branden <scott.branden@broadcom.com>,
	Ray Jui <rjui@broadcom.com>,
	Arun Parameswaran <arun.parameswaran@broadcom.com>,
	Russell King <linux@armlinux.org.uk>,
	linux-kernel@vger.kernel.org,
	bcm-kernel-feedback-list@broadcom.com, netdev@vger.kernel.org,
	"David S . Miller" <davem@davemloft.net>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] net: phy: restore mdio regs in the iproc mdio driver
Date: Fri, 14 Feb 2020 13:47:46 -0800	[thread overview]
Message-ID: <20200214214746.10153-1-scott.branden@broadcom.com> (raw)

From: Arun Parameswaran <arun.parameswaran@broadcom.com>

The mii management register in iproc mdio block
does not have a retention register so it is lost on suspend.
Save and restore value of register while resuming from suspend.

Fixes: bb1a619735b4 ("net: phy: Initialize mdio clock at probe function")

Signed-off-by: Arun Parameswaran <arun.parameswaran@broadcom.com>
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
---
 drivers/net/phy/mdio-bcm-iproc.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/net/phy/mdio-bcm-iproc.c b/drivers/net/phy/mdio-bcm-iproc.c
index 7e9975d25066..f1ded03f0229 100644
--- a/drivers/net/phy/mdio-bcm-iproc.c
+++ b/drivers/net/phy/mdio-bcm-iproc.c
@@ -178,6 +178,23 @@ static int iproc_mdio_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+int iproc_mdio_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct iproc_mdio_priv *priv = platform_get_drvdata(pdev);
+
+	/* restore the mii clock configuration */
+	iproc_mdio_config_clk(priv->base);
+
+	return 0;
+}
+
+static const struct dev_pm_ops iproc_mdio_pm_ops = {
+	.resume = iproc_mdio_resume
+};
+#endif /* CONFIG_PM_SLEEP */
+
 static const struct of_device_id iproc_mdio_of_match[] = {
 	{ .compatible = "brcm,iproc-mdio", },
 	{ /* sentinel */ },
@@ -188,6 +205,9 @@ static struct platform_driver iproc_mdio_driver = {
 	.driver = {
 		.name = "iproc-mdio",
 		.of_match_table = iproc_mdio_of_match,
+#ifdef CONFIG_PM_SLEEP
+		.pm = &iproc_mdio_pm_ops,
+#endif
 	},
 	.probe = iproc_mdio_probe,
 	.remove = iproc_mdio_remove,
-- 
2.17.1


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WARNING: multiple messages have this Message-ID (diff)
From: Scott Branden <scott.branden@broadcom.com>
To: Andrew Lunn <andrew@lunn.ch>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Heiner Kallweit <hkallweit1@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>,
	"David S . Miller" <davem@davemloft.net>,
	Ray Jui <rjui@broadcom.com>,
	bcm-kernel-feedback-list@broadcom.com, netdev@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Arun Parameswaran <arun.parameswaran@broadcom.com>,
	Scott Branden <scott.branden@broadcom.com>
Subject: [PATCH v2] net: phy: restore mdio regs in the iproc mdio driver
Date: Fri, 14 Feb 2020 13:47:46 -0800	[thread overview]
Message-ID: <20200214214746.10153-1-scott.branden@broadcom.com> (raw)

From: Arun Parameswaran <arun.parameswaran@broadcom.com>

The mii management register in iproc mdio block
does not have a retention register so it is lost on suspend.
Save and restore value of register while resuming from suspend.

Fixes: bb1a619735b4 ("net: phy: Initialize mdio clock at probe function")

Signed-off-by: Arun Parameswaran <arun.parameswaran@broadcom.com>
Signed-off-by: Scott Branden <scott.branden@broadcom.com>
---
 drivers/net/phy/mdio-bcm-iproc.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/net/phy/mdio-bcm-iproc.c b/drivers/net/phy/mdio-bcm-iproc.c
index 7e9975d25066..f1ded03f0229 100644
--- a/drivers/net/phy/mdio-bcm-iproc.c
+++ b/drivers/net/phy/mdio-bcm-iproc.c
@@ -178,6 +178,23 @@ static int iproc_mdio_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+int iproc_mdio_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct iproc_mdio_priv *priv = platform_get_drvdata(pdev);
+
+	/* restore the mii clock configuration */
+	iproc_mdio_config_clk(priv->base);
+
+	return 0;
+}
+
+static const struct dev_pm_ops iproc_mdio_pm_ops = {
+	.resume = iproc_mdio_resume
+};
+#endif /* CONFIG_PM_SLEEP */
+
 static const struct of_device_id iproc_mdio_of_match[] = {
 	{ .compatible = "brcm,iproc-mdio", },
 	{ /* sentinel */ },
@@ -188,6 +205,9 @@ static struct platform_driver iproc_mdio_driver = {
 	.driver = {
 		.name = "iproc-mdio",
 		.of_match_table = iproc_mdio_of_match,
+#ifdef CONFIG_PM_SLEEP
+		.pm = &iproc_mdio_pm_ops,
+#endif
 	},
 	.probe = iproc_mdio_probe,
 	.remove = iproc_mdio_remove,
-- 
2.17.1


             reply	other threads:[~2020-02-14 21:48 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-14 21:47 Scott Branden [this message]
2020-02-14 21:47 ` [PATCH v2] net: phy: restore mdio regs in the iproc mdio driver Scott Branden
2020-02-14 21:50 ` Andrew Lunn
2020-02-14 21:50   ` Andrew Lunn
2020-02-14 22:02 ` Florian Fainelli
2020-02-14 22:02   ` Florian Fainelli
2020-02-17  3:19 ` David Miller
2020-02-17  3:19   ` David Miller

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