The gpio_request_by_name() returns zero in case of success, however the conditional return value check in gpio_request_by_name() checks only for (ret != -ENOENT) and if the condition is true, returns ret outright.
This leads to a situation where successful gpio_request_by_name() return leads to immediate successful eth_phy_of_to_plat() return as well, and to skipped parsing of "reset-assert-us" and "reset-deassert-us", so the PHY driver operates with valid reset GPIO, but with assert/deassert times set to default, which is 0, instead of the values from DT. This breaks PHY reset.
Fix this by checking if return value is non-zero and then for this one single allowed non-zero return value, -ENOENT.
Signed-off-by: Marek Vasut marex@denx.de Cc: Ramon Fried rfried.dev@gmail.com --- drivers/net/eth-phy-uclass.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/eth-phy-uclass.c b/drivers/net/eth-phy-uclass.c index c04bab944d6..a9b358ee234 100644 --- a/drivers/net/eth-phy-uclass.c +++ b/drivers/net/eth-phy-uclass.c @@ -138,7 +138,7 @@ static int eth_phy_of_to_plat(struct udevice *dev) ret = gpio_request_by_name(dev, "reset-gpios", 0, &uc_priv->reset_gpio, GPIOD_IS_OUT); - if (ret != -ENOENT) + if (ret && ret != -ENOENT) return ret;
uc_priv->reset_assert_delay = dev_read_u32_default(dev, "reset-assert-us", 0);