linux-toradex.git/drivers/gpio/gpio-sch.c, branch v4.1.12

gpio: sch: Consolidate similar algorithms

2015-01-29T12:46:29+00:00

Consolidating similar algorithms into common functions to make
GPIO SCH simpler and manageable.

Signed-off-by: Chang Rebecca Swee Fun 
Reviewed-by: Alexandre Courbot 
Reviewed-by: Mika Westerberg 
Signed-off-by: Linus Walleij

gpio: sch: Add support for Intel Quark X1000 SoC

2015-01-15T16:23:12+00:00

Intel Quark X1000 provides a total of 16 GPIOs. The GPIOs are split between
the legacy I/O bridge and the GPIO controller.

GPIO-SCH is the GPIO pins on legacy bridge for Intel Quark SoC.
Intel Quark X1000 has 2 GPIOs powered by the core power well and 6 from
the suspend power well.

This piece of work is derived from Dan O'Donovan's initial work for Quark
X1000 enabling.

Signed-off-by: Chang Rebecca Swee Fun 
Reviewed-by: Mika Westerberg 
Reviewed-by: Alexandre Courbot 
Signed-off-by: Linus Walleij

Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2014-12-15T00:10:09+00:00

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev__once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...

gpio: sch: Consolidate core and resume banks

2014-11-04T20:58:22+00:00

This is actually a single device with two sets of identical registers,
which just happen to start from a different offset. Instead of having
separate GPIO chips created we consolidate them to be single GPIO chip.

In addition having a single GPIO chip allows us to handle ACPI GPIO
translation in the core in a more generic way, since the two GPIO chips
share the same parent ACPI device.

Signed-off-by: Mika Westerberg 
Acked-by: Linus Walleij 
Acked-by: Grant Likely 
Signed-off-by: Rafael J. Wysocki

gpio: drop owner assignment from platform_drivers

2014-10-20T14:20:31+00:00

A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang

gpio: remove all usage of gpio_remove retval in driver/gpio

2014-07-22T14:39:26+00:00

Signed-off-by: abdoulaye berthe 
Signed-off-by: Linus Walleij

gpio-sch: set output level after configuration of direction

2014-04-28T19:35:08+00:00

According to the datasheet, writing to the level register has no effect
when GPIO is programmed as input. Actually the the level register is
read-only when configured as input. Thus presetting the output level
before switching to output is _NOT_ possible. Any writes are lost!
Hence we set the level after configuring the GPIO as output.
But we cannot prevent a short low pulse if direction is set to high and
an external  pull-up is connected.

Signed-off-by: Daniel Krueger 
Signed-off-by: Alexander Stein 
Signed-off-by: Linus Walleij

gpio: Don't override the error code in probe error handling

2013-05-20T18:27:30+00:00

Otherwise, we return 0 in probe error paths when gpiochip_remove() returns 0.
Also show error message if gpiochip_remove() fails.

Signed-off-by: Axel Lin 
Cc: Tomoya MORINAGA 
Cc: Denis Turischev 
Cc: Lars Poeschel 
Signed-off-by: Linus Walleij

gpio: gpio-sch.c: fix checkpatch error

2013-03-27T15:05:16+00:00

Fix :
 gpio/gpio-sch.c:206: ERROR: switch and case should be at the same indent

Also remove blank lines

Signed-off-by: Laurent Navet 
Signed-off-by: Linus Walleij

gpio-sch: Allow for more than 8 lines in the resume well

2013-03-27T15:05:08+00:00

The E6xx (TunnelCreek) CPUs have 9 GPIO lines in the resume well. Update
the resume functions to allow for more than 8 GPIO lines, using the core
functions as a template.

Cc: Grant Likely 
Cc: Linus Walleij 
Signed-off-by: Darren Hart 
Signed-off-by: Linus Walleij