linux-toradex.git/drivers/of/of_mdio.c, branch v4.5-rc3

of: of_mdio: Add a whitelist of PHY compatibilities.

2016-01-29T06:53:16+00:00

Some phy nodes list a compatible value indicating the PHY make/model.
This is never used to match the device to the driver. However it does
confuse the code to separate a PHY from a generic MDIO device like a
switch. Generic MDIO devices must have a compatible value, PHYs can
list clause 22 or 45, but nothing else.

Issue a warning if we find a compatible value known on the whitelist,
and say it is a PHY.

Fixes: a9049e0c513c ("mdio: Add support for mdio drivers.")
Reported-by: Aaro Koskinen 
Reported-by: Olof Johansson 
Tested-by: Aaro Koskinen 
Signed-off-by: Andrew Lunn 
Signed-off-by: David S. Miller

of: of_mdio: Ensure mdio device is a PHY

2016-01-29T00:07:32+00:00

of_phy_find_device() is used to find the phy device associated with a
device node. It is expected the node is for a PHY device, but in fact
it could of been probed as a generic MDIO device. Ensure the device is
a PHY before returning it.

Fixes: a9049e0c513c ("mdio: Add support for mdio drivers.")
Reported-by: Aaro Koskinen 
Reported-by: Olof Johansson 
Signed-off-by: Andrew Lunn 
Tested-by: Aaro Koskinen 
Signed-off-by: David S. Miller

mdio: remove an unneed condition

2016-01-12T16:51:57+00:00

It used to be that mdio->irq was a pointer but after e7f4dc3536a4
('mdio: Move allocation of interrupts into core') it's an array inside
the mdio struct so it can never be NULL.

Reviewed-by: Andrew Lunn 
Signed-off-by: Dan Carpenter 
Signed-off-by: David S. Miller

mdio: Add support for mdio drivers.

2016-01-07T19:31:27+00:00

Not all devices on an MDIO bus are PHYs. Meaning not all MDIO drivers
are PHY drivers. Add support for generic MDIO drivers.

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

phy: Add API for {un}registering an mdio device to a bus.

2016-01-07T19:31:26+00:00

Rather than have drivers directly manipulate the mii_bus structure,
provide and API for registering and unregistering devices on an MDIO
bus, and performing lookups.

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

of: phy: Only register a phy device for phys

2016-01-07T19:31:26+00:00

We will soon support devices other than phys on the mdio bus. Look at
a child's compatibility string to determine if it is a phy, before
registering a phy device.

Signed-off-by: Andrew Lunn 
Signed-off-by: David S. Miller

phy: Add an mdio_device structure

2016-01-07T19:31:26+00:00

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 
Signed-off-by: David S. Miller

mdio: Move allocation of interrupts into core

2016-01-07T19:31:26+00:00

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

of_mdio: fix MDIO phy device refcounting

2015-09-25T06:04:52+00:00

bus_find_device() is defined as:

 * This is similar to the bus_for_each_dev() function above, but it
 * returns a reference to a device that is 'found' for later use, as
 * determined by the @match callback.

and it does indeed return a reference-counted pointer to the device:

        while ((dev = next_device(&i)))
                if (match(dev, data) && get_device(dev))
                                        ^^^^^^^^^^^^^^^
                        break;
        klist_iter_exit(&i);
        return dev;

What that means is that when we're done with the struct device, we must
drop that reference.  Neither of_phy_connect() nor of_phy_attach() did
this when phy_connect_direct() or phy_attach_direct() failed.

With our previous patch, phy_connect_direct() and phy_attach_direct()
take a new refcount on the phy device when successful, so we can drop
our local reference immediatley after these functions, whether or not
they succeeded.

Signed-off-by: Russell King 
Acked-by: Rob Herring 
Signed-off-by: David S. Miller

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

2015-08-31T21:48:02+00:00

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