net: phy: fixed_phy: Fix fixed_phy not checking GPIO

Fix fixed_phy not checking GPIO if no link_update callback
is registered.

In the original version all users registered a lin

net: phy: fixed_phy: Fix fixed_phy not checking GPIO

Fix fixed_phy not checking GPIO if no link_update callback
is registered.

In the original version all users registered a link_update
callback so the issue was masked.

Fixes: a5597008dbc2 ("phy: fixed_phy: Add gpio to determine link up/down.")
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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net: phy: fixed-phy: Drop GPIO from fixed_phy_add()

All users of the fixed_phy_add() pass -1 as GPIO number
to the fixed phy driver, and all users of fixed_phy_register()
pass -1 as

net: phy: fixed-phy: Drop GPIO from fixed_phy_add()

All users of the fixed_phy_add() pass -1 as GPIO number
to the fixed phy driver, and all users of fixed_phy_register()
pass -1 as GPIO number as well, except for the device
tree MDIO bus.

Any new users should create a proper device and pass the
GPIO as a descriptor associated with the device so delete
the GPIO argument from the calls and drop the code looking
requesting a GPIO in fixed_phy_add().

In fixed phy_register(), investigate the "fixed-link"
node and pick the GPIO descriptor from "link-gpios" if
this property exists. Move the corresponding code out
of of_mdio.c as the fixed phy code anyways requires
OF to be in use.

Tested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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net: phy: Convert some PHY and MDIO driver files to SPDX headers

Where the license text and the MODULE_LICENSE() value agree, convert
to using an SPDX header, removing the license text.

net: phy: Convert some PHY and MDIO driver files to SPDX headers

Where the license text and the MODULE_LICENSE() value agree, convert
to using an SPDX header, removing the license text.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Fixed PHY: Add fixed_phy_change_carrier()

Drivers can use this as .ndo_change_carrier() to change carrier
via /sys/class/net/ethX/carrier.

Signed-off-by: Joakim Tjernlund <joaki

Fixed PHY: Add fixed_phy_change_carrier()

Drivers can use this as .ndo_change_carrier() to change carrier
via /sys/class/net/ethX/carrier.

Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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net: ethernet: Convert phydev advertize and supported from u32 to link mode

There are a few MAC/PHYs combinations which now support > 1Gbps. These
may need to make use of link modes with

net: ethernet: Convert phydev advertize and supported from u32 to link mode

There are a few MAC/PHYs combinations which now support > 1Gbps. These
may need to make use of link modes with bits > 31. Thus their
supported PHY features or advertised features cannot be implemented
using the current bitmap in a u32. Convert to using a linkmode bitmap,
which can support all the currently devices link modes, and is future
proof as more modes are added.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

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net: phy: fixed-phy: Make the error path simpler

When platform_device_register_simple() fails we can return
the error immediately instead of jumping to the 'err_pdev'
label.

net: phy: fixed-phy: Make the error path simpler

When platform_device_register_simple() fails we can return
the error immediately instead of jumping to the 'err_pdev'
label.

This makes the error path a bit simpler.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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net: phy: fixed-phy: remove fixed_phy_update_state()

mvneta is the only user of fixed_phy_update_state(), which has been
converted to use phylink instead. Remove fixed_phy_update_state(

net: phy: fixed-phy: remove fixed_phy_update_state()

mvneta is the only user of fixed_phy_update_state(), which has been
converted to use phylink instead. Remove fixed_phy_update_state().

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

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net: phy: fixed_phy: fix of_node leak in fixed_phy_unregister

Make sure to drop the of_node reference taken in fixed_phy_register()
when deregistering a PHY.

Fixes: a75951217472

net: phy: fixed_phy: fix of_node leak in fixed_phy_unregister

Make sure to drop the of_node reference taken in fixed_phy_register()
when deregistering a PHY.

Fixes: a75951217472 ("net: phy: extend fixed driver with
fixed_phy_register()")

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

Several cases of overlapping changes, except the packet scheduler
conflicts which deal with the addition of the free list pa

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

Several cases of overlapping changes, except the packet scheduler
conflicts which deal with the addition of the free list parameter
to qdisc_enqueue().

Signed-off-by: David S. Miller <davem@davemloft.net>

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net: phy: Manage fixed PHY address space using IDA

If we have a system which uses fixed PHY devices and calls
fixed_phy_register() then fixed_phy_unregister() we can exhaust the
numb

net: phy: Manage fixed PHY address space using IDA

If we have a system which uses fixed PHY devices and calls
fixed_phy_register() then fixed_phy_unregister() we can exhaust the
number of fixed PHYs available after a while, since we keep incrementing
the variable phy_fixed_addr, but we never decrement it.

This patch fixes that by converting the fixed PHY allocation to using
IDA, which takes care of the allocation/dealloaction of the PHY
addresses for us.

Fixes: a75951217472 ("net: phy: extend fixed driver with fixed_phy_register()")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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phy: improve safety of fixed-phy MII register reading

There is no prevention of a concurrent call to both fixed_mdio_read()
and fixed_phy_update_state(), which can result in the state be

phy: improve safety of fixed-phy MII register reading

There is no prevention of a concurrent call to both fixed_mdio_read()
and fixed_phy_update_state(), which can result in the state being
modified while it's being inspected. Fix this by using a seqcount
to detect modifications, and memcpy()ing the state.

We remain slightly naughty here, calling link_update() and updating
the link status within the read-side loop - which would need rework
of the design to change.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

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phy: generate swphy registers on the fly

Generate software phy registers as and when requested, rather than
duplicating the state in fixed_phy. This allows us to eliminate
the dupli

phy: generate swphy registers on the fly

Generate software phy registers as and when requested, rather than
duplicating the state in fixed_phy. This allows us to eliminate
the duplicate storage of of the same data, which is only different
in format.

As fixed_phy_update_regs() no longer updates register state, rename
it to fixed_phy_update().

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

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phy: separate swphy state validation from register generation

Separate out the generation of MII registers from the state validation.
This allows us to simplify the error handing in fixe

phy: separate swphy state validation from register generation

Separate out the generation of MII registers from the state validation.
This allows us to simplify the error handing in fixed_phy() by allowing
earlier error detection.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

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phy: move fixed_phy MII register generation to a library

Move the fixed_phy MII register generation to a library to allow other
software phy implementations to use this code.

Re

phy: move fixed_phy MII register generation to a library

Move the fixed_phy MII register generation to a library to allow other
software phy implementations to use this code.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

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phy: fix crash in fixed_phy_add()

Since e7f4dc3536a ("mdio: Move allocation of interrupts into core"),
platforms which call fixed_phy_add() before fixed_mdio_bus_init() is
called (fo

phy: fix crash in fixed_phy_add()

Since e7f4dc3536a ("mdio: Move allocation of interrupts into core"),
platforms which call fixed_phy_add() before fixed_mdio_bus_init() is
called (for example, because the platform code and the fixed_phy driver
use the same initcall level) crash in fixed_phy_add() since the
->mii_bus is not allocated.

Also since e7f4dc3536a, these interrupts are initalized to polling by
default. The few (old) platforms which directly use fixed_phy_add()
from their platform code all pass PHY_POLL for the irq argument, so we
can keep these platforms not crashing by simply not attempting to set
the irq if PHY_POLL is passed.

Also, even if problems have not been reported on more modern platforms
which used fixed_phy_register() from drivers' probe functions, we return
-EPROBE_DEFER if the MDIO bus is not yet registered so that the probe is
retried later.

Fixes: e7f4dc3536a400 ("mdio: Move allocation of interrupts into core")
Signed-off-by: Rabin Vincent <rabinv@axis.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

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fixed_phy: get_phy_device() doesn't return NULL anymore

Now that get_phy_device() no longer returns NULL on error, we don't need
to check for it...

Signed-off-by: Sergei Shtylyo

fixed_phy: get_phy_device() doesn't return NULL anymore

Now that get_phy_device() no longer returns NULL on error, we don't need
to check for it...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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phy: fixed: Fix removal of phys.

The fixed phys delete function simply removed the fixed phy from the
internal linked list and freed the memory. It however did not
unregister the ass

phy: fixed: Fix removal of phys.

The fixed phys delete function simply removed the fixed phy from the
internal linked list and freed the memory. It however did not
unregister the associated phy device. This meant it was still possible
to find the phy device on the mdio bus.

Make fixed_phy_del() an internal function and add a
fixed_phy_unregister() to unregisters the phy device and then uses
fixed_phy_del() to free resources.

Modify DSA to use this new API function, so we don't leak phys.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

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phy: Add an mdio_device structure

Not all devices attached to an MDIO bus are phys. So add an
mdio_device structure to represent the generic parts of an mdio
device, and place this s

phy: Add an mdio_device structure

Not all devices attached to an MDIO bus are phys. So add an
mdio_device structure to represent the generic parts of an mdio
device, and place this structure into the phy_device.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

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mdio: Move allocation of interrupts into core

Have mdio_alloc() create the array of interrupt numbers, and
initialize it to POLLING. This is what most MDIO drivers want, so
allowing

mdio: Move allocation of interrupts into core

Have mdio_alloc() create the array of interrupt numbers, and
initialize it to POLLING. This is what most MDIO drivers want, so
allowing code to be removed from the drivers.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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phy: fixed-phy: properly validate phy in fixed_phy_update_state()

Validate that the phy_device passed into fixed_phy_update_state() is a
fixed-phy device before walking the list of phys

phy: fixed-phy: properly validate phy in fixed_phy_update_state()

Validate that the phy_device passed into fixed_phy_update_state() is a
fixed-phy device before walking the list of phys for a fixed phy at the
same address.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

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fixed_phy: pass 'irq' to fixed_phy_add()

I've noticed that fixed_phy_register() ignores its 'irq' parameter instead of
passing it to fixed_phy_add(). Luckily, fixed_phy_register() seem

fixed_phy: pass 'irq' to fixed_phy_add()

I've noticed that fixed_phy_register() ignores its 'irq' parameter instead of
passing it to fixed_phy_add(). Luckily, fixed_phy_register() seems to always
be called with PHY_POLL for 'irq'... :-)

Fixes: a75951217472 ("net: phy: extend fixed driver with fixed_phy_register()")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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net: phy: fixed_phy: Set phy capabilities even when link down.

What features a phy supports is masked in genphy_config_init() by
looking at the PHYs BMSR register.

If the link i

net: phy: fixed_phy: Set phy capabilities even when link down.

What features a phy supports is masked in genphy_config_init() by
looking at the PHYs BMSR register.

If the link is down, fixed_phy_update_regs() will only set the auto-
negotiation capable bit in BMSR. Thus genphy_config_init() comes to
the conclusion the PHY can only perform 10/Half, and masks out the
higher speed features. If however the link it up, BMSR is set to
indicate the speed the PHY is capable of auto-negotiating, and
genphy_config_init() does not mask out the high speed features.

To fix this, when the link is down, have fixed_phy_update_regs() leave
the link status, auto-negotiation complete, and link partner
capabilities unset, but set all the local capabilities depending on
the fixed phy speed.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

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phy: fixed_phy: Add gpio to determine link up/down.

An SFP module may have a link up/down status pin which can be
connection to a GPIO line of the host. Add support for reading such an

phy: fixed_phy: Add gpio to determine link up/down.

An SFP module may have a link up/down status pin which can be
connection to a GPIO line of the host. Add support for reading such an
GPIO in the fixed_phy driver.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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phy: fixed_phy: Set supported speed in phydev

Set the supported field of the phydev to indicate the speed features
of the phy. If the phy is never attached to a netdev, but used in an

phy: fixed_phy: Set supported speed in phydev

Set the supported field of the phydev to indicate the speed features
of the phy. If the phy is never attached to a netdev, but used in an
adjust_link() function, the speed will be incorrectly evaluated to
10/half rather than the correct speed/duplex.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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net: phy: Allow PHY devices to identify themselves as Ethernet switches, etc.

Some Ethernet MAC drivers using the PHY library require the hardcoding
of link parameters when interfaced to

net: phy: Allow PHY devices to identify themselves as Ethernet switches, etc.

Some Ethernet MAC drivers using the PHY library require the hardcoding
of link parameters when interfaced to a switch device, SFP module,
switch to switch port, etc. This has typically lead to various ad-hoc
implementations looking like this:

- using a "fixed PHY" emulated device, which will provide link
indication towards the Ethernet MAC driver and hardware

- pretend there is no PHY and hardcode link parameters, ala mv643x_eth

Based on that, it is desireable to have the PHY drivers advertise the
correct link parameters, just like regular Ethernet PHYs towards their
CPU Ethernet MAC drivers, however, Ethernet MAC drivers should be able
to tell whether this link should be monitored or not. In the context
of an Ethernet switch, SFP module, switch to switch link, we do not
need to monitor this link since it should be always up.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

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