This is a note to let you know that I've just added the patch titled
net: ethernet: stmmac: dwmac-rk: fix optional phy regulator handling
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-ethernet-stmmac-dwmac-rk-fix-optional-phy-regula.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7ba80ef45bbf19aeb1245cd3fe7e0ae3941dd7ba
Author: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
Date: Fri Apr 7 18:11:29 2023 +0200
net: ethernet: stmmac: dwmac-rk: fix optional phy regulator handling
[ Upstream commit db21973263f8c56750cb610f1d5e8bee00a513b9 ]
The usual devm_regulator_get() call already handles "optional"
regulators by returning a valid dummy and printing a warning
that the dummy regulator should be described properly. This
code open coded the same behaviour, but masked any errors that
are not -EPROBE_DEFER and is quite noisy.
This change effectively unmasks and propagates regulators errors
not involving -ENODEV, downgrades the error print to warning level
if no regulator is specified and captures the probe defer message
for /sys/kernel/debug/devices_deferred.
Fixes: 2e12f536635f ("net: stmmac: dwmac-rk: Use standard devicetree property for phy regulator")
Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
index e7fbc9b30bf96..d0d47d91b460c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
@@ -1194,9 +1194,6 @@ static int phy_power_on(struct rk_priv_data *bsp_priv, bool enable)
int ret;
struct device *dev = &bsp_priv->pdev->dev;
- if (!ldo)
- return 0;
-
if (enable) {
ret = regulator_enable(ldo);
if (ret)
@@ -1227,14 +1224,11 @@ static struct rk_priv_data *rk_gmac_setup(struct platform_device *pdev,
of_get_phy_mode(dev->of_node, &bsp_priv->phy_iface);
bsp_priv->ops = ops;
- bsp_priv->regulator = devm_regulator_get_optional(dev, "phy");
+ bsp_priv->regulator = devm_regulator_get(dev, "phy");
if (IS_ERR(bsp_priv->regulator)) {
- if (PTR_ERR(bsp_priv->regulator) == -EPROBE_DEFER) {
- dev_err(dev, "phy regulator is not available yet, deferred probing\n");
- return ERR_PTR(-EPROBE_DEFER);
- }
- dev_err(dev, "no regulator found\n");
- bsp_priv->regulator = NULL;
+ ret = PTR_ERR(bsp_priv->regulator);
+ dev_err_probe(dev, ret, "failed to get phy regulator\n");
+ return ERR_PTR(ret);
}
ret = of_property_read_string(dev->of_node, "clock_in_out", &strings);
