linux-toradex.git/drivers/pwm, branch v4.4.2

Merge tag 'pwm/for-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm

2015-11-11T17:16:10+00:00

Pull pwm updates from Thierry Reding:
 "This round contains a couple of new drivers for the Marvell Berlin
  family of SoCs, various SoCs from Renesas and Broadcom as well as the
  backlight PWM present on MediaTek SoCs.

  Further existing drivers are extended to support a wider range of
  hardware.

  The remaining patches are minor fixes and cleanups across the board.

  Note that one of the patches included in this pull request is against
  arch/unicore32.  I've included it here because I couldn't get a
  response from Guan Xuetao and I consider the change low-risk.
  Equivalent patches have been merged and tested in Samsung and PXA
  trees.  The goal is to finally get rid of legacy code paths that have
  repeatedly been causing headaches"

* tag 'pwm/for-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (24 commits)
  pwm: sunxi: Fix whitespace issue
  pwm: sysfs: Make use of the DEVICE_ATTR_[RW][WO] macro's
  pwm: sysfs: Remove unnecessary temporary variable
  unicore32: nb0916: Use PWM lookup table
  pwm: pwm-rcar: Revise the device tree binding document about compatible
  pwm: Return -ENODEV if no PWM lookup match is found
  pwm: sun4i: Add support for PWM controller on sun5i SoCs
  pwm: Set enable state properly on failed call to enable
  pwm: lpss: Add support for runtime PM
  pwm: lpss: Add more Intel Broxton IDs
  pwm: lpss: Support all four PWMs on Intel Broxton
  pwm: lpss: Add support for multiple PWMs
  pwm-pca9685: enable ACPI device found on Galileo Gen2
  pwm: Add MediaTek display PWM driver support
  dt-bindings: pwm: Add MediaTek display PWM bindings
  pwm: tipwmss: Enable on TI DRA7x and AM437x
  pwm: atmel-hlcdc: add sama5d2 SoC support.
  pwm: Add Broadcom BCM7038 PWM controller support
  Documentation: dt: add Broadcom BCM7038 PWM controller binding
  pwm: Add support for R-Car PWM Timer
  ...

pwm: sunxi: Fix whitespace issue

2015-11-10T12:06:47+00:00

This patch changes no code, it just fixes the whitespacing. Operators
should be separated from operands by a single space.

Signed-off-by: Olliver Schinagl 
Signed-off-by: Thierry Reding

pwm: sysfs: Make use of the DEVICE_ATTR_[RW][WO] macro's

2015-11-10T12:06:46+00:00

For the npwm property the PWM sysfs interface already made use of the
DEVICE_ATTR_RO macro. This patch expands this to the other sysfs
properties so that the code base is concise and makes use of this
helpful macro.

This has the advantage of slightly reducing the code size, improving
readability and no longer using magic values for permissions.

Signed-off-by: Olliver Schinagl 
Signed-off-by: Thierry Reding

pwm: sysfs: Remove unnecessary temporary variable

2015-11-10T12:06:45+00:00

Use the result of pwm_is_enabled() directly instead of storing it in a
temporary variable.

Signed-off-by: Olliver Schinagl 
Signed-off-by: Thierry Reding

pwm: Return -ENODEV if no PWM lookup match is found

2015-11-10T12:06:42+00:00

When looking up a PWM using the lookup table, assume that all entries
will have been added already, so failure to find a match means that no
corresponding entry has been registered.

This fixes an issue where -EPROBE_DEFER would be returned if the PWM
lookup table is empty. After this fix, -EPROBE_DEFER is reserved for
situations where no provider has yet registered for a matching entry.

Signed-off-by: Thierry Reding

pwm: sun4i: Add support for PWM controller on sun5i SoCs

2015-11-10T12:06:41+00:00

The PWM controller on sun5i SoCs is identical to the one found on sun7i
SoCs. On the A13 package only one of the 2 pins is routed to the outside,
so only advertise one PWM channel there.

Signed-off-by: Hans de Goede 
Acked-by: Maxime Ripard 
Signed-off-by: Thierry Reding

pwm: Set enable state properly on failed call to enable

2015-11-10T12:06:16+00:00

The pwm_enable() function didn't clear the enabled bit if a call to the
driver's ->enable() callback returned an error. The result was that the
state of the PWM core was wrong. Clearing the bit when enable returns
an error ensures the state is properly set.

Tested-by: Jonathan Richardson 
Reviewed-by: Dmitry Torokhov 
Signed-off-by: Jonathan Richardson 
[thierry.reding@gmail.com: add missing kerneldoc for the lock]
Signed-off-by: Thierry Reding

pwm: lpss: Add support for runtime PM

2015-11-06T13:34:13+00:00

To be able to save some power when PWM is not in use, add support for
runtime PM for this driver. This also allows the platform to transition to
low power S0ix states when the system is idle.

Signed-off-by: Huiquan Zhong 
Signed-off-by: Qipeng Zha 
Signed-off-by: Mika Westerberg 
Signed-off-by: Thierry Reding

pwm: lpss: Add more Intel Broxton IDs

2015-11-06T13:26:29+00:00

Add more Intel Broxton ACPI and PCI IDs to the driver supported devices
list.

Signed-off-by: Mika Westerberg 
Signed-off-by: Thierry Reding

pwm: lpss: Support all four PWMs on Intel Broxton

2015-11-06T13:26:28+00:00

Intel Broxton has similar PWM than Intel Braswell but instead of one it has
four PWMs included in one PCI/ACPI device. This patch adds support for all
the four PWMs and changes the PCI part of the driver to use
'pwm_lpss_bxt_info' instead.

Signed-off-by: Mika Westerberg 
Signed-off-by: Thierry Reding