We detected some problems using the smsc lan8720a in combination with
i.MX28 and tracked this down to commit 21009686662f ("net: phy: smsc: move
smsc_phy_config_init reset part in a soft_reset function")
With 2100968666 the generic soft reset is replaced by a specific function
which handles power down state correctly. But additionally the soft reset
itself got conditional and is therefore also only performed if the phy is
in power down state.

This patch keeps the conditional wake up from power down, but
re-introduces the unconditional soft reset using the generic soft reset
function.
It was tested on linux-4.1.25 and linux-4.7.0-rc2.

Signed-off-by: Manfred Schlaegl <manfred.schlaegl@ginzinger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When the lan87xx_read_status function is getting called the
energy detect mode is enabled again even if it has been
disabled by device tree.

Added private struct to check the energy detect status.

Signed-off-by: Teresa Remmet <t.remmet@phytec.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

LAN8740 has a different phy_id than LAN8710/LAN8720.

Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Rather than have each driver set the driver owner field, do it once in
the core code. This will also help with later changes, when the device
structure will move.

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>

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>

On some boards the energy enable detect mode leads in
trouble with some switches, so make the enabling of
this mode configurable through DT.

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/smsc.c:127:3-4: Unneeded semicolon

 Remove unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

CC: Igor Plyatov <plyatov@gmail.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

* Due to HW bug, LAN8700 sometimes does not detect presence of energy in the
  Ethernet cable in Energy Detect Power-Down mode (e.g while EDPWRDOWN bit is
  set, the ENERGYON bit does not asserted sometimes). This is a common bug of
  LAN87xx family of PHY chips.
* The lan87xx_read_status() was improved to acquire ENERGYON bit. Its previous
  algorythm still not reliable on 100 % and sometimes skip cable plugging.

Signed-off-by: Igor Plyatov <plyatov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Replace module init/exit which only calls phy_drivers_register with
module_phy_driver macro.

Tested using Micrel driver, and otherwise compile-tested only.

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

On the one hand, phy_device.c provides a generic reset function if the phy
driver does not provide a soft_reset pointer. This generic reset does not take
into account the state of the phy, with a potential failure if the phy is in
powerdown mode. On the other hand, smsc driver provides a function with both
correct reset behaviour and configuration.

This patch moves the reset part into a new smsc_phy_reset function and provides
the soft_reset pointer to have a correct reset behaviour by default.

Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou@armadeus.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>