From e64a5a5b8e93a4064da38cde8b25e68750c60d54 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Wed, 10 Mar 2021 20:53:42 -0800 Subject: [PATCH] net: phy: broadcom: Add power down exit reset state delay [ 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: fe26821fa614 ("net: phy: broadcom: Wire suspend/resume for BCM54810") Signed-off-by: Florian Fainelli Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/phy/broadcom.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c index cd271de9609b..69713ea36d4e 100644 --- a/drivers/net/phy/broadcom.c +++ b/drivers/net/phy/broadcom.c @@ -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); }