linux-stable.git/drivers/phy, branch v3.18.26

phy: twl4030-usb: make runtime pm more reliable.

2015-08-20T21:33:10+00:00

[ Upstream commit 56301df6bcaaed31e77b8c500ca1b437f46a3158 ]

A construct like:

        if (pm_runtime_suspended(twl->dev))
               pm_runtime_get_sync(twl->dev);

is against the spirit of the runtime_pm interface as it
makes the internal refcounting useless.

In this case it is also racy, particularly as 'put_autosuspend'
is used to drop a reference.
When that happens a timer is started and the device is
runtime-suspended after the timeout.
If the above code runs in this window, the device will not be
found to be suspended so no pm_runtime reference is taken.
When the timer expires the device will be suspended, which is
against the intention of the code.

So be more direct is taking and dropping references.
If twl->linkstat is VBUS_VALID or ID_GROUND, then hold a
pm_runtime reference, otherwise don't.
Define "cable_present()" to test for this condition.

Tested-by: Tony Lindgren 
Signed-off-by: NeilBrown 
Signed-off-by: Kishon Vijay Abraham I 
Signed-off-by: Sasha Levin

phy: Find the right match in devm_phy_destroy()

2015-04-17T00:11:41+00:00

[ Upstream commit 2f1bce487cd0a02623cff3d877940f9a2026341c ]

devm_phy_create() stores the pointer to the new PHY at the address
returned by devres_alloc(). The res parameter passed to devm_phy_match()
is therefore the location where the pointer to the PHY is stored, hence
it needs to be dereferenced before comparing to the match data in order
to find the correct match.

Cc:  # v3.13+
Signed-off-by: Thierry Reding 
Signed-off-by: Kishon Vijay Abraham I 
Signed-off-by: Sasha Levin

phy: omap-usb2: Enable runtime PM of omap-usb2 phy properly

2014-11-05T22:34:06+00:00

The USB OTG port does not work since v3.16 on omap platform.
This is a regression introduced by the commit
eb82a3d846fa (phy: omap-usb2: Balance pm_runtime_enable() on probe failure
 and remove).
This because the call to pm_runtime_enable() function is moved after the
call to devm_phy_create() function, which has side effect since later in
the subsequent calls of devm_phy_create() there is a check with
pm_runtime_enabled() to configure few things.

Fixes: eb82a3d846fa
Signed-off-by: Oussama Ghorbel 
Tested-by: Rabin Vincent 
Signed-off-by: Kishon Vijay Abraham I 
Cc: stable 
Signed-off-by: Greg Kroah-Hartman

phy: remove .owner field for drivers using module_platform_driver

2014-09-24T09:48:34+00:00

This patch removes the superflous .owner field for drivers which
use the module_platform_driver or platform_driver_register api,
as this is overriden in __platform_driver_register.

Signed-off-by: Peter Griffin 
Signed-off-by: Kishon Vijay Abraham I

phy: exynos-dp-video: Use syscon support to control pmu register

2014-09-24T09:48:34+00:00

Currently the DP_PHY_ENABLE register is mapped in the driver,
and accessed to control power to the PHY.
With mfd-syscon and regmap interface available at our disposal,
it's wise to use that instead of using a 'reg' property for the
controller and allocating a memory resource for that.

To facilitate this, we have added another compatible string
for Exynso5420 SoC to acquire driver data which contains
different DP-PHY-CONTROL register offset.

Signed-off-by: Vivek Gautam 
Cc: Jingoo Han 
Cc: Kishon Vijay Abraham I 
Signed-off-by: Kishon Vijay Abraham I

phy: phy-stih41x-usb: Add usb phy support for STiH41x SoCs.

2014-09-24T09:48:33+00:00

This driver adds support for USB (1.1 and 2.0) phy for STiH415 and
STiH416 System-On-Chips from STMicroelectronics.

Signed-off-by: Maxime Coquelin 
Signed-off-by: Peter Griffin 
Signed-off-by: Kishon Vijay Abraham I

phy: phy-stih407-usb: Add usb picoPHY driver found on stih407 SoC family

2014-09-24T09:48:33+00:00

This is the generic phy driver for the picoPHY ports used by the
USB2 and USB3 Host controllers when controlling usb2/1.1 devices. It
is found on STiH407 SoC family from STMicroelectronics.

Signed-off-by: Giuseppe Cavallaro 
Signed-off-by: Peter Griffin 
Signed-off-by: Kishon Vijay Abraham I

usb: phy: twl4030-usb: Use mutex instead of spinlock for protecting the data

2014-09-24T09:48:33+00:00

We're using threaded irq on a I2C bus and we're sleeping in
twl4030_usb_irq() as it calls twl4030_usb_linkstat() which
calls the i2c functions. If we ever need to lock for longer
I2C transaction sequences a mutex will allow us to do that
easily.

Signed-off-by: Tony Lindgren 
Signed-off-by: Kishon Vijay Abraham I

usb: phy: twl4030-usb: Remove asleep and rely on runtime PM

2014-09-24T09:48:33+00:00

There's no longer need for tracking the phy state in the driver
with asleep, we can now rely on runtime PM.

Signed-off-by: Tony Lindgren 
Signed-off-by: Kishon Vijay Abraham I

usb: phy: twl4030-usb: Move code from twl4030_phy_power to the runtime PM calls

2014-09-24T09:48:32+00:00

We don't need twl4030_phy_power() any longer now that we have
the runtime PM calls. Let's get rid of it as it's confusing.
No functional changes, just move the code and use res instead
of ret as we are not returning that value.

Signed-off-by: Tony Lindgren 
Signed-off-by: Kishon Vijay Abraham I