linux-stable.git/drivers/net/phy/phy_device.c, branch v5.6

net: phy: fix MDIO bus PM PHY resuming

2020-03-12T22:36:12+00:00

So far we have the unfortunate situation that mdio_bus_phy_may_suspend()
is called in suspend AND resume path, assuming that function result is
the same. After the original change this is no longer the case,
resulting in broken resume as reported by Geert.

To fix this call mdio_bus_phy_may_suspend() in the suspend path only,
and let the phy_device store the info whether it was suspended by
MDIO bus PM.

Fixes: 503ba7c69610 ("net: phy: Avoid multiple suspends")
Reported-by: Geert Uytterhoeven 
Tested-by: Geert Uytterhoeven 
Signed-off-by: Heiner Kallweit 
Reviewed-by: Florian Fainelli 
Signed-off-by: David S. Miller

net: phy: corrected the return value for genphy_check_and_restart_aneg and genphy_c45_check_and_restart_aneg

2020-02-27T04:41:42+00:00

When auto-negotiation is not required, return value should be zero.

Changes v1->v2:
- improved comments and code as Andrew Lunn and Heiner Kallweit suggestion
- fixed issue in genphy_c45_check_and_restart_aneg as Russell King
  suggestion.

Fixes: 2a10ab043ac5 ("net: phy: add genphy_check_and_restart_aneg()")
Fixes: 1af9f16840e9 ("net: phy: add genphy_c45_check_and_restart_aneg()")
Signed-off-by: Sudheesh Mavila 
Reviewed-by: Heiner Kallweit 
Reviewed-by: Andrew Lunn 
Signed-off-by: David S. Miller

net: phy: Avoid multiple suspends

2020-02-24T04:57:50+00:00

It is currently possible for a PHY device to be suspended as part of a
network device driver's suspend call while it is still being attached to
that net_device, either via phy_suspend() or implicitly via phy_stop().

Later on, when the MDIO bus controller get suspended, we would attempt
to suspend again the PHY because it is still attached to a network
device.

This is both a waste of time and creates an opportunity for improper
clock/power management bugs to creep in.

Fixes: 803dd9c77ac3 ("net: phy: avoid suspending twice a PHY")
Signed-off-by: Florian Fainelli 
Signed-off-by: David S. Miller

net: phy: Added IRQ print to phylink_bringup_phy()

2020-01-14T18:56:58+00:00

The information about the PHY attached to the PHYLINK instance is useful
but is missing the IRQ prints that phy_attached_info() adds.
phy_attached_info() is a bit long and it would not be possible to use
phylink_info() anyway.

Signed-off-by: Florian Fainelli 
Signed-off-by: David S. Miller

net: mdio: of: Register discovered MII time stampers.

2019-12-26T03:51:33+00:00

When parsing a PHY node, register its time stamper, if any, and attach
the instance to the PHY device.

Signed-off-by: Richard Cochran 
Reviewed-by: Andrew Lunn 
Reviewed-by: Florian Fainelli 
Reviewed-by: Rob Herring 
Signed-off-by: David S. Miller

net: Introduce a new MII time stamping interface.

2019-12-26T03:51:33+00:00

Currently the stack supports time stamping in PHY devices.  However,
there are newer, non-PHY devices that can snoop an MII bus and provide
time stamps.  In order to support such devices, this patch introduces
a new interface to be used by both PHY and non-PHY devices.

In addition, the one and only user of the old PHY time stamping API is
converted to the new interface.

Signed-off-by: Richard Cochran 
Reviewed-by: Andrew Lunn 
Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2019-12-22T23:15:05+00:00

Mere overlapping changes in the conflicts here.

Signed-off-by: David S. Miller

net: phy: ensure that phy IDs are correctly typed

2019-12-21T05:48:06+00:00

PHY IDs are 32-bit unsigned quantities. Ensure that they are always
treated as such, and not passed around as "int"s.

Fixes: 13d0ab6750b2 ("net: phy: check return code when requesting PHY driver module")
Signed-off-by: Russell King 
Reviewed-by: Florian Fainelli 
Reviewed-by: Andrew Lunn 
Signed-off-by: David S. Miller

net: phy: provide and use genphy_read_status_fixed()

2019-12-19T20:52:34+00:00

There are two drivers and generic code which contain exactly the same
code to read the status of a PHY operating without autonegotiation
enabled. Rather than duplicate this code, provide a helper to read
this information.

Signed-off-by: Russell King 
Reviewed-by: Andrew Lunn 
Reviewed-by: Florian Fainelli 
Signed-off-by: David S. Miller

net: phy: add genphy_check_and_restart_aneg()

2019-12-19T20:52:34+00:00

Add a helper for restarting autonegotiation(), similar to the clause 45
variant.  Use it in __genphy_config_aneg()

Signed-off-by: Russell King 
Reviewed-by: Andrew Lunn 
Reviewed-by: Florian Fainelli 
Signed-off-by: David S. Miller