Commit fe26821f authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller

net: phy: broadcom: Wire suspend/resume for BCM54810

The BCM54810 PHY can use the standard BMCR Power down suspend, but needs
a custom resume routine which first clear the Power down bit, and then
re-initializes the PHY. While in low-power mode, the PHY only accepts
writes to the BMCR register. The datasheet clearly says it:

Reads or writes to any MII register other than MII Control register
(address 00h) while the device is in the standby power-down mode may
cause unpredictable results.
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent cb64da3a
......@@ -313,6 +313,20 @@ static int bcm54xx_config_init(struct phy_device *phydev)
return 0;
}
static int bcm54xx_resume(struct phy_device *phydev)
{
int ret;
/* Writes to register other than BMCR would be ignored
* unless we clear the PDOWN bit first
*/
ret = genphy_resume(phydev);
if (ret < 0)
return ret;
return bcm54xx_config_init(phydev);
}
static int bcm5482_config_init(struct phy_device *phydev)
{
int err, reg;
......@@ -706,6 +720,8 @@ static struct phy_driver broadcom_drivers[] = {
.config_aneg = bcm5481_config_aneg,
.ack_interrupt = bcm_phy_ack_intr,
.config_intr = bcm_phy_config_intr,
.suspend = genphy_suspend,
.resume = bcm54xx_resume,
}, {
.phy_id = PHY_ID_BCM5482,
.phy_id_mask = 0xfffffff0,
......
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