diff mbox series

[5.10,112/221] net: phy: broadcom: Add power down exit reset state delay

Message ID 20210329075632.954177697@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman March 29, 2021, 7:57 a.m. UTC 
From: Florian Fainelli <f.fainelli@gmail.com>

[ 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 <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/phy/broadcom.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

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);
 }