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| author | Arun Parameswaran <arun.parameswaran@broadcom.com> | 2020-02-14 13:47:46 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-02-16 19:19:18 -0800 |
| commit | 6f08e98d62799e53c89dbf2c9a49d77e20ca648c (patch) | |
| tree | 5e5cfa2a908a4b611ac84760e7d55c8df02e01a0 | |
| parent | e08ad80551b4b33c02f2fce1522f6c227d3976cf (diff) | |
| download | linux-6f08e98d62799e53c89dbf2c9a49d77e20ca648c.tar.gz linux-6f08e98d62799e53c89dbf2c9a49d77e20ca648c.tar.bz2 linux-6f08e98d62799e53c89dbf2c9a49d77e20ca648c.zip | |
net: phy: restore mdio regs in the iproc mdio driver
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>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/phy/mdio-bcm-iproc.c | 20 |
1 files changed, 20 insertions, 0 deletions
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, |