Messages in this thread Patch in this message | | | From | Francesco Dolcini <> | Subject | [PATCH net-next] net: phy: perform a PHY reset on resume | Date | Sat, 11 Dec 2021 14:01:46 +0100 |
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Perform a PHY reset in phy_init_hw() to ensure that the PHY is working after resume. This is required if the PHY was powered down in suspend like it is done by the freescale FEC driver in fec_suspend().
Link: https://lore.kernel.org/netdev/20211206101326.1022527-1-philippe.schenker@toradex.com/ Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
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Philippe: what about something like that? Only compile tested, but I see no reason for this not solving the issue.
Any delay required on the reset can be specified using reset-assert-us/reset-deassert-us.
--- drivers/net/phy/phy_device.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index 74d8e1dc125f..7eab0c054adf 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1158,7 +1158,8 @@ int phy_init_hw(struct phy_device *phydev) { int ret = 0; - /* Deassert the reset signal */ + /* phy reset required if the phy was powered down during suspend */ + phy_device_reset(phydev, 1); phy_device_reset(phydev, 0); if (!phydev->drv) -- 2.25.1
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