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net: phy: Expose phydev::dev_flags through sysfs 

phydev::dev_flags contains a bitmask of configuration bits requested by
the consumer of a PHY device (Ethernet MAC or switch) towards the PHY
driver. Since these flags are often used for requesting LED or other
type of configuration being able to quickly audit them without
instrumenting the kernel is useful.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Fainelli 2021-03-10 14:12:43 -08:00 committed by David S. Miller
parent ee47ed08d7
commit b0bade515d
2 changed files with 23 additions and 0 deletions
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12
Documentation/ABI/testing/sysfs-class-net-phydev
View File

@ -51,3 +51,15 @@ Description:
Boolean value indicating whether the PHY device is used in
standalone mode, without a net_device associated, by PHYLINK.
Attribute created only when this is the case.
What: /sys/class/mdio_bus/<bus>/<device>/phy_dev_flags
Date: March 2021
KernelVersion: 5.13
Contact: netdev@vger.kernel.org
Description:
32-bit hexadecimal number representing a bit mask of the
configuration bits passed from the consumer of the PHY
(Ethernet MAC, switch, etc.) to the PHY driver. The flags are
only used internally by the kernel and their placement are
not meant to be stable across kernel versions. This is intended
for facilitating the debugging of PHY drivers.

11
drivers/net/phy/phy_device.c
View File

@ -512,10 +512,21 @@ phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
}
static DEVICE_ATTR_RO(phy_has_fixups);
static ssize_t phy_dev_flags_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct phy_device *phydev = to_phy_device(dev);
return sprintf(buf, "0x%08x\n", phydev->dev_flags);
}
static DEVICE_ATTR_RO(phy_dev_flags);
static struct attribute *phy_dev_attrs[] = {
&dev_attr_phy_id.attr,
&dev_attr_phy_interface.attr,
&dev_attr_phy_has_fixups.attr,
&dev_attr_phy_dev_flags.attr,
NULL,
};
ATTRIBUTE_GROUPS(phy_dev);