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  1. 19 Sep, 2017 1 commit
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  5. 14 Apr, 2017 1 commit
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  11. 17 Feb, 2017 1 commit
    • H. Nikolaus Schaller's avatar
      Input: tsc2007 - add iio interface to read external ADC input and temperature · f1443404
      H. Nikolaus Schaller authored 
      The tsc2007 chip not only has a resistive touch screen controller but
also an external AUX adc imput which can be used for an ambient
light sensor, battery voltage monitoring or any general purpose.

Additionally it can measure the chip temperature.

This extension provides an iio interface for these adc channels.

Since it is not wasting much resources and is very straightforward,
we simply provide all other adc channels as optional iio interfaces
as weel. This can be used for debugging or special applications.

This patch also splits the tsc2007 driver in several source files:
tsc2007.h -- constants, structs and stubs
tsc2007_core.c -- functional parts of the original driver
tsc2007_iio.c -- the optional iio stuff

Makefile magic allows to conditionally link the iio stuff
if CONFIG_IIO=y or =m in a way that it works with
CONFIG_TOUCHSCREEN_TSC2007=m.
Signed-off-by: default avatarH. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: default avatarJonathan Cameron <jic23@kernel.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
      f1443404
  13. 09 Feb, 2017 1 commit
  15. 06 Jan, 2017 1 commit
  17. 27 Sep, 2016 1 commit
  19. 19 Sep, 2016 1 commit
    • Arnd Bergmann's avatar
      [media] Input: atmel_mxt: disallow impossible configuration · 7a4b9a29
      Arnd Bergmann authored 
      The newnly added debug mode for the atmel_mxt_ts driver relies on
the v4l2 interface and vb2_vmalloc, but those might be configured
as loadable modules when the driver itself is built-in, resulting
in a link failure:

drivers/input/touchscreen/atmel_mxt_ts.o: In function `mxt_vidioc_querycap':
atmel_mxt_ts.c:(.text.mxt_vidioc_querycap+0x10): undefined reference to `video_devdata'
drivers/input/touchscreen/atmel_mxt_ts.o: In function `mxt_buffer_queue':
atmel_mxt_ts.c:(.text.mxt_buffer_queue+0x20): undefined reference to `vb2_plane_vaddr'
atmel_mxt_ts.c:(.text.mxt_buffer_queue+0x164): undefined reference to `vb2_buffer_done'
drivers/input/touchscreen/atmel_mxt_ts.o: In function `mxt_free_object_table':
atmel_mxt_ts.c:(.text.mxt_free_object_table+0x18): undefined reference to `video_unregister_device'
atmel_mxt_ts.c:(.text.mxt_free_object_table+0x20): undefined reference to `v4l2_device_unregister'

The best workaround I could come up with is to disallow the debug
mode unless it's actually possible to call it.

Fixes: ecfdd7e2 ("[media] Input: atmel_mxt_ts - output diagnostic debug via V4L2 device")
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarNick Dyer <nick@shmanahar.org>
Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
      7a4b9a29
  21. 23 Aug, 2016 2 commits
  23. 22 Aug, 2016 1 commit
  25. 04 Aug, 2016 1 commit
  27. 03 Aug, 2016 2 commits
  29. 28 May, 2016 1 commit
  31. 19 May, 2016 1 commit
  33. 18 May, 2016 1 commit
  35. 04 Mar, 2016 1 commit
  37. 17 Feb, 2016 1 commit
  39. 11 Feb, 2016 1 commit
  41. 09 Feb, 2016 1 commit
  43. 18 Dec, 2015 1 commit
    • Irina Tirdea's avatar
      Input: goodix - reset device at init · ec6e1b40
      Irina Tirdea authored 
      After power on, it is recommended that the driver resets the device.
The reset procedure timing is described in the datasheet and is used
at device init (before writing device configuration) and
for power management. It is a sequence of setting the interrupt
and reset pins high/low at specific timing intervals. This procedure
also includes setting the slave address to the one specified in the
ACPI/device tree.

This is based on Goodix datasheets for GT911 and GT9271 and on Goodix
driver gt9xx.c for Android (publicly available in Android kernel
trees for various devices).

For reset the driver needs to control the interrupt and
reset gpio pins (configured through ACPI/device tree). For devices
that do not have the gpio pins properly declared, the functionality
depending on these pins will not be available, but the device can still
be used with basic functionality.

For both device tree and ACPI, the interrupt gpio pin configuration is
read from the "irq-gpios" property and the reset pin configuration is
read from the "reset-gpios" property. For ACPI 5.1, named properties
can be specified using the _DSD section. This functionality will not be
available for devices that use indexed gpio pins declared in the _CRS
section (we need to provide backward compatibility with devices
that do not support using the interrupt gpio pin as output).

For ACPI, the pins can be specified using ACPI 5.1:
Device (STAC)
{
    Name (_HID, "GDIX1001")
    ...

    Method (_CRS, 0, Serialized)
    {
        Name (RBUF, ResourceTemplate ()
        {
            I2cSerialBus (0x0014, ControllerInitiated, 0x00061A80,
                AddressingMode7Bit, "\\I2C0",
                0x00, ResourceConsumer, ,
                )

            GpioInt (Edge, ActiveHigh, Exclusive, PullNone, 0x0000,
                "\\I2C0", 0x00, ResourceConsumer, ,
                 )
                 {   // Pin list
                     0
                 }

            GpioIo (Exclusive, PullDown, 0x0000, 0x0000,
                IoRestrictionOutputOnly, "\\I2C0", 0x00,
                ResourceConsumer, ,
                )
                {
                     1
                }
        })
        Return (RBUF)
    }

    Name (_DSD,  Package ()
    {
        ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
        Package ()
        {
            Package (2) {"irq-gpios", Package() {^STAC, 0, 0, 0 }},
            Package (2) {"reset-gpios", Package() {^STAC, 1, 0, 0 }},
            ...
        }
    }
Signed-off-by: default avatarOctavian Purdila <octavian.purdila@intel.com>
Signed-off-by: default avatarIrina Tirdea <irina.tirdea@intel.com>
Acked-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarBastien Nocera <hadess@hadess.net>
Tested-by: default avatarBastien Nocera <hadess@hadess.net>
Tested-by: default avatarAleksei Mamlin <mamlinav@gmail.com>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
      ec6e1b40
  45. 16 Dec, 2015 2 commits
  47. 01 Dec, 2015 1 commit
  49. 03 Nov, 2015 2 commits
  51. 18 Oct, 2015 1 commit
    • Randy Dunlap's avatar
      Input: sur40 - add dependency on VIDEO_V4L2 · c8a1978e
      Randy Dunlap authored 
      Fix build errors due to missing Kconfig dependency.

drivers/built-in.o: In function `sur40_disconnect':
sur40.c:(.text+0x22be6e): undefined reference to `video_unregister_device'
sur40.c:(.text+0x22be77): undefined reference to `v4l2_device_unregister'
drivers/built-in.o: In function `sur40_process_video':
sur40.c:(.text+0x22c1d4): undefined reference to `v4l2_get_timestamp'
drivers/built-in.o: In function `sur40_probe':
sur40.c:(.text+0x22ca82): undefined reference to `v4l2_device_register'
sur40.c:(.text+0x22cb1a): undefined reference to `v4l2_device_unregister'
sur40.c:(.text+0x22cbf7): undefined reference to `video_device_release_empty'
sur40.c:(.text+0x22cc53): undefined reference to `__video_register_device'
sur40.c:(.text+0x22cc90): undefined reference to `video_unregister_device'
drivers/built-in.o: In function `sur40_vidioc_querycap':
sur40.c:(.text+0x22ccb0): undefined reference to `video_devdata'
Signed-off-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
      c8a1978e
  53. 06 Oct, 2015 1 commit
  55. 02 Oct, 2015 1 commit
  57. 05 Sep, 2015 2 commits
  59. 04 Aug, 2015 1 commit
  61. 28 Jul, 2015 2 commits
  63. 12 Jul, 2015 1 commit
  65. 24 Jun, 2015 1 commit
  67. 26 May, 2015 1 commit
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