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net: phy: broadcom: Add power down exit reset state delay

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[ Upstream commit 7a1468ba0e02eee24ae1353e8933793a27198e20 ]

Per the datasheet, when we clear the power down bit, the PHY remains in
an internal reset state for 40us and then resume normal operation.
Account for that delay to avoid any issues in the future if
genphy_resume() changes.

Fixes: fe26821fa6 ("net: phy: broadcom: Wire suspend/resume for BCM54810")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Florian Fainelli 2021-03-10 20:53:42 -08:00 committed by Greg Kroah-Hartman
parent 87378c850f
commit e64a5a5b8e
1 changed files with 5 additions and 0 deletions
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5
drivers/net/phy/broadcom.c
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@ -332,6 +332,11 @@ static int bcm54xx_resume(struct phy_device *phydev)
if (ret < 0)
return ret;
/* Upon exiting power down, the PHY remains in an internal reset state
* for 40us
*/
fsleep(40);
return bcm54xx_config_init(phydev);
}