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net: phy: aquantia: wait for the GLOBAL_CFG to start returning real values

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When the PHY is first coming up (or resuming from suspend), it's
possible that although the FW status shows as running, we still see
zeroes in the GLOBAL_CFG set of registers and cannot determine available
modes. Since all models support 10M, add a poll and wait the config to
become available.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bartosz Golaszewski 2024-07-08 09:50:22 +02:00 committed by David S. Miller
parent ad649a1fac
commit 708405f3e5
1 changed files with 7 additions and 1 deletions
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8
drivers/net/phy/aquantia/aquantia_main.c
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@ -652,7 +652,13 @@ static int aqr107_fill_interface_modes(struct phy_device *phydev)
unsigned long *possible = phydev->possible_interfaces; unsigned long *possible = phydev->possible_interfaces;
unsigned int serdes_mode, rate_adapt; unsigned int serdes_mode, rate_adapt;
phy_interface_t interface; phy_interface_t interface;
int i, val; int i, val, ret;
ret = phy_read_mmd_poll_timeout(phydev, MDIO_MMD_VEND1,
VEND1_GLOBAL_CFG_10M, val, val != 0,
1000, 100000, false);
if (ret)
return ret;
/* Walk the media-speed configuration registers to determine which /* Walk the media-speed configuration registers to determine which
* host-side serdes modes may be used by the PHY depending on the * host-side serdes modes may be used by the PHY depending on the