linux-toradex.git/include/linux/of_mdio.h, branch v4.12

of_mdio: Correct check against CONFIG_OF

2017-03-24T19:51:04+00:00

CONFIG_OF_MDIO is actually what triggers the build of drivers/of/of_mdio.c, so
providing inline stubs when CONFIG_OF_MDIO=y should be based on that symbol as
well.

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

of_mdio: add helper to deregister fixed-link PHYs

2016-11-30T04:17:02+00:00

Add helper to deregister fixed-link PHYs registered using
of_phy_register_fixed_link().

Convert the two drivers that care to deregister their fixed-link PHYs to
use the new helper, but note that most drivers currently fail to do so.

Signed-off-by: Johan Hovold 
Signed-off-by: David S. Miller

of_mdio: Abstract a general interface for phy connect

2016-07-17T04:32:58+00:00

Abstract a general interface "of_phy_get_and_connect"
for PHY connect. User will have no bother with getting
"phy-mode" and "phy-handle" any more.

Suggested-by: Arnd Bergmann 
Signed-off-by: Dongpo Li 
Reviewed-by: Jiancheng Xue 
Signed-off-by: David S. Miller

of_mdio: select fixed phy support unconditionally

2016-06-28T09:47:52+00:00

Calling the fixed-phy functions when CONFIG_FIXED_PHY=m as a previous
change tried cannot work if the caller is in built-in code:

drivers/of/built-in.o: In function `of_phy_register_fixed_link':
of_reserved_mem.c:(.text+0x85e0): undefined reference to `fixed_phy_register'

Making of_mdio depend on 'FIXED_PHY || !FIXED_PHY' would solve this
dependency by enforcing that OF_MDIO itself becomes a loadable module
when FIXED_PHY=y, but that creates a different dependency as it
breaks any built-in ethernet driver that uses of_mdio.

Making FIXED_PHY a bool option also cannot work, since it depends on
PHYLIB, which again is tristate.

This version now uses 'select FIXED_PHY' to ensure that the fixed-phy
portion of of_mdio is not optional. The main downside of this is
a small increase in code size for cases that do not need fixed phy
support, but it should avoid all of the link-time problems.

Signed-off-by: Arnd Bergmann 
Fixes: d1bd330a229f ("of_mdio: Enable fixed PHY support if driver is a module")
Acked-by: Randy Dunlap 
Signed-off-by: David S. Miller

of_mdio: Enable fixed PHY support if driver is a module

2016-06-23T19:12:21+00:00

The fixed_phy driver doesn't have to be built-in, and it's
important that of_mdio supports it even if it's a module.

Signed-off-by: Ben Hutchings 
Acked-by: Florian Fainelli 
Signed-off-by: David S. Miller

of: mdio: export of_mdio_parse_addr

2015-03-11T21:56:28+00:00

Export of_mdio_parse_addr() which allows parsing a given Ethernet PHY
node MDIO address, verify it is within the allowed range, and return
its value. This is going to be useful for the DSA code which needs to
deal with multiple layers of MDIO buses.

Signed-off-by: Florian Fainelli 
Acked-by: Rob Herring 
Signed-off-by: David S. Miller

net: fix circular dependency in of_mdio code

2014-07-02T07:24:14+00:00

Commit 86f6cf4127 (net: of_mdio: add of_mdiobus_link_phydev()) introduced a
circular dependency between libphy and of_mdio.

depmod: ERROR: /kernel/drivers/net/phy/libphy.ko in
dependency cycle!
depmod: ERROR: /kernel/drivers/of/of_mdio.ko in dependency cycle!

The problem is that of_mdio.c references &mdio_bus_type and libphy now
references of_mdiobus_link_phydev.

Fix this by not exporting of_mdiobus_link_phydev() from of_mdio.ko.
Make it a static function in mdio_bus.c instead.

Signed-off-by: Daniel Mack 
Reported-by: Jeff Mahoney 
Fixes: 86f6cf4127 (net: of_mdio: add of_mdiobus_link_phydev())
Reviewed-by: Florian Fainelli 
Signed-off-by: David S. Miller

net: of_mdio: add of_mdiobus_link_phydev()

2014-05-29T22:23:29+00:00

Add a function to walk the list of subnodes of a mdio bus and look for
a node that matches the phy's address with its 'reg' property. If found,
set the of_node pointer for the phy. This allows auto-probed pyh
devices to be augmented by information passed in via DT.

Signed-off-by: Daniel Mack 
Reviewed-by: Florian Fainelli 
Signed-off-by: David S. Miller

of: mdio: remove of_phy_connect_fixed_link

2014-05-22T19:16:44+00:00

All in-tree drivers have been converted to use the new pair of
functions: of_is_fixed_phy_link() plus of_phy_register_fixed_link(), we
can now safely remove of_phy_connect_fixed_link.

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

of: provide a binding for fixed link PHYs

2014-05-16T21:19:22+00:00

Some Ethernet MACs have a "fixed link", and are not connected to a
normal MDIO-managed PHY device. For those situations, a Device Tree
binding allows to describe a "fixed link" using a special PHY node.

This patch adds:

 * A documentation for the fixed PHY Device Tree binding.

 * An of_phy_is_fixed_link() function that an Ethernet driver can call
   on its PHY phandle to find out whether it's a fixed link PHY or
   not. It should typically be used to know if
   of_phy_register_fixed_link() should be called.

 * An of_phy_register_fixed_link() function that instantiates the
   fixed PHY into the PHY subsystem, so that when the driver calls
   of_phy_connect(), the PHY device associated to the OF node will be
   found.

These two additional functions also support the old fixed-link Device
Tree binding used on PowerPC platforms, so that ultimately, the
network device drivers for those platforms could be converted to use
of_phy_is_fixed_link() and of_phy_register_fixed_link() instead of
of_phy_connect_fixed_link(), while keeping compatibility with their
respective Device Tree bindings.

Signed-off-by: Thomas Petazzoni 
Reviewed-by: Florian Fainelli 
Tested-by: Florian Fainelli 
Signed-off-by: David S. Miller