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] net: phy: restore mdio regs in the iproc mdio driver
Date: Fri, 14 Feb 2020 11:48:58 -0800 [thread overview]
Message-ID: <20200214194858.8528-1-scott.branden@broadcom.com> (raw)
From: Arun Parameswaran <arun.parameswaran@broadcom.com>
The mii management register in iproc mdio block
does not have a reention 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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next reply other threads:[~2020-02-14 19:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-14 19:48 Scott Branden [this message]
2020-02-14 20:33 ` [PATCH] net: phy: restore mdio regs in the iproc mdio driver Andrew Lunn
2020-02-14 20:37 ` Florian Fainelli
2020-02-14 21:45 ` Scott Branden
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