6.6-stable review patch. If anyone has any objections, please let me know.
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From: Alexander Dahl ada@thorsis.com
[ Upstream commit bccaf1fe08f2c9f96f6bc38391d41e67f6bf38e3 ]
Value CRSM_SFT_PD written to Software Power-Down Control Register (CRSM_SFT_PD_CNTRL) is 0x01 and therefor different to value CRSM_SFT_PD_RDY (0x02) read from System Status Register (CRSM_STAT) for confirmation powerdown has been reached.
The condition could have only worked when disabling powerdown (both 0x00), but never when enabling it (0x01 != 0x02).
Result is a timeout, like so:
$ ifdown eth0 macb f802c000.ethernet eth0: Link is Down ADIN1100 f802c000.ethernet-ffffffff:01: adin_set_powerdown_mode failed: -110 ADIN1100 f802c000.ethernet-ffffffff:01: adin_set_powerdown_mode failed: -110
Fixes: 7eaf9132996a ("net: phy: adin1100: Add initial support for ADIN1100 industrial PHY") Signed-off-by: Alexander Dahl ada@thorsis.com Reviewed-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Acked-by: Nuno Sá nuno.sa@analog.com Link: https://patch.msgid.link/20251119124737.280939-2-ada@thorsis.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/phy/adin1100.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/phy/adin1100.c b/drivers/net/phy/adin1100.c index 7619d6185801c..2f47b7020e12b 100644 --- a/drivers/net/phy/adin1100.c +++ b/drivers/net/phy/adin1100.c @@ -148,7 +148,7 @@ static int adin_set_powerdown_mode(struct phy_device *phydev, bool en) return ret;
return phy_read_mmd_poll_timeout(phydev, MDIO_MMD_VEND1, ADIN_CRSM_STAT, ret, - (ret & ADIN_CRSM_SFT_PD_RDY) == val, + !!(ret & ADIN_CRSM_SFT_PD_RDY) == en, 1000, 30000, true); }