Implement support for the following device-tree and ACPI 5.1 DSD
properties in the goodix touchscreen driver:
- touchscreen-inverted-x: X axis is inverted (boolean)
- touchscreen-inverted-y: Y axis is inverted (boolean)
- touchscreen-swapped-x-y: X and Y axis are swapped (boolean)
These are necessary on tablets which have a display in portrait
format while the touchscreen is in landscape format, such as e.g.
the MSI Primo 81.
Signed-off-by: Karsten Merker <merker@debian.org>
Tested-by: Bastien Nocera <hadess@hadess.net>
Tested-by: Irina Tirdea <irina.tirdea@intel.com> (with ACPI DSD properties)
Tested-by: Aleksei Mamlin <mamlinav@gmail.com> (with device-tree properties)
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Bastien Nocera <hadess@hadess.net>
Tested-by: Bastien Nocera <hadess@hadess.net>
Tested-by: Aleksei Mamlin <mamlinav@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
On this board, the touchscreen, an ads7843, is not handled directly by
Linux but by a companion FPGA. This FPGA is memory-mapped and the IP
design is very similar to the mk712.
This commit adds the support for this IP.
Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
On some devices the wake and enable pins of the pixcir touchscreen
controller are connected to gpios and these must be controlled by the
driver for the device to operate properly.
Signed-off-by: Sander Vermin <sander@vermin.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This adds support for the i2c based tsc2004 touchscreen controller.
Signed-off-by: Michael Welling <mwelling@ieee.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
FT5506 is essentially the same as other FT5x06 devices other than
supporting 10 support points.
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This adds support for the FT6x06 and the FT6x36 family of capacitive touch
panel controllers, in particular the FT6236.
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Instead of hardcoding IRQ trigger type to IRQF_TRIGGER_FALLING, let's
respect settings specified in device tree. To be compatible with older
DTSes, if trigger type is not set up in DTS we'll set it to default
(falling edge).
Tested-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The current/old gpio framework used doesn't properly listen to
ACTIVE_LOW and ACTIVE_HIGH flags. The newer gpio framework takes into
account these flags when setting gpio values.
Since the values being output were based on voltage and not logic they
change to reflect this difference. Also use gpiod_set_value_cansleep since
wake and reset pins can be provided by bus based io expanders.
Switch from msleep(5) to udelay_range(5000,6000) to avoid check patch
warning.
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Freescale i.MX6UL contains a internal touchscreen controller,
this patch add a driver to support this controller.
Signed-off-by: Haibo Chen <haibo.chen@freescale.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The Colibri Vybrid VF50 module supports 4-wire touchscreens using
FETs and ADC inputs. This driver uses the IIO consumer interface
and relies on the vf610_adc driver based on the IIO framework.
Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Add support for hardware which uses an I2C Serializer / Deserializer
(SerDes) to communicate with the zFroce touch driver. In this case the
SerDes will be configured as an interrupt controller and the zForce driver
will have no access to poll the GPIO line.
To support this, we add two dedicated new GPIOs in the device tree:
reset-gpios and irq-gpios, with the irq-gpios being optional.
To not break the existing device trees, the index based 'gpios' entries
are still supported, but marked as deprecated.
With this, if the interrupt GPIO is available, either via the old or new
device tree style, the while loop will read and handle the packets as long
as the GPIO indicates that the interrupt is asserted (existing, unchanged
driver behavior).
If the interrupt GPIO isn't available, i.e. not configured via the new
device tree style, we are falling back to one read per ISR invocation
(new behavior to support the SerDes).
Note that the gpiod functions help to handle the optional GPIO:
devm_gpiod_get_index_optional() will return NULL in case the interrupt
GPIO isn't available. And gpiod_get_value_cansleep() does cover this, too,
by returning 0 in this case.
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Reviewed-by: Heiko Stuebner <heiko.stuebner@bq.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Merge tag 'v4.2-rc3' into next
Sync up with Linux 4.2-rc3 to bring in infrastructure (OF) pieces.
The controller has a RESET pin which is usually controlled over
a GPIO line. If such a GPIO is provided, perform a RESET
during probe.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Here's the big, really big, staging tree patches for 4.2-rc1.
Loads of stuff in here, almost all just coding style fixes / churn, and
a few new drivers as well, one of which I just disabled from the build a
few minutes ago due to way too many build warnings.
Other than the one "disable this driver" patch, all of these have been
in linux-next for quite a while with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver updates from Greg KH:
"Here's the big, really big, staging tree patches for 4.2-rc1.
Loads of stuff in here, almost all just coding style fixes / churn,
and a few new drivers as well, one of which I just disabled from the
build a few minutes ago due to way too many build warnings.
Other than the one "disable this driver" patch, all of these have been
in linux-next for quite a while with no reported issues"
* tag 'staging-4.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1163 commits)
staging: wilc1000: disable driver due to build warnings
Staging: rts5208: fix CHANGE_LINK_STATE value
Staging: sm750fb: ddk750_swi2c.c: Insert spaces before parenthesis
Staging: sm750fb: ddk750_swi2c.c: Place braces on correct lines
Staging: sm750fb: ddk750_swi2c.c: Insert spaces around operators
Staging: sm750fb: ddk750_swi2c.c: Replace spaces with tabs
Staging: sm750fb: ddk750_swi2c.h: Shorten lines to under 80 characters
Staging: sm750fb: ddk750_swi2c.h: Replace spaces with tabs
Staging: sm750fb: modedb.h: Shorten lines to under 80 characters
Staging: sm750fb: modedb.h: Replace spaces with tabs
staging: comedi: addi_apci_3120: rename 'this_board' variables
staging: comedi: addi_apci_1516: rename 'this_board' variables
staging: comedi: ni_atmio: cleanup ni_getboardtype()
staging: comedi: vmk80xx: sanity check context used to get the boardinfo
staging: comedi: vmk80xx: rename 'boardinfo' variables
staging: comedi: dt3000: rename 'this_board' variables
staging: comedi: adv_pci_dio: rename 'this_board' variables
staging: comedi: cb_pcidas64: rename 'thisboard' variables
staging: comedi: cb_pcidas: rename 'thisboard' variables
staging: comedi: me4000: rename 'thisboard' variables
...
Fix dts to match what the Linux kernel expects. This works around
touchscreen problems in 4.1 linux on Nokia n900.
Signed-off-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Add optional DT properties to set open delay, sample delay and number
of averages per sample for each adc step. Open delay, sample delay
and averaging are some of the parameters that affect the sampling rate
and accuracy of the sample. Making these parameters configurable via
DT will help in balancing speed vs accuracy.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
The ChipOne icn8318 is an i2c capacitive touchscreen controller typically
used in cheap android tablets, this commit adds a driver for it.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
On devices with a native portrait screen a landscape touchscreen /
digitizer may be used, this happens e.g. on ebook readers. In this case the
X and Y axis of the touchscreen are swapped compared to the screen.
Add a touchscreen-swapped-x-y property which drivers can use to see if they
need to swap the axis to make the touchscreen coordinates match the screen
coordinates.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Add initial version of the Broadcom touchscreen driver.
Reviewed-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Tested-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Jonathan Richardson <jonathar@broadcom.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit introduces two new optional device-tree properties:
"tp-sensitive-adjust": adjust sensitivity of pen down detection
"filter-type": select median and averaging filter
The previous fixed defaults, didn't work well for the Olimex
A13-LCD10TS (I have).
Signed-off-by: Jens Thiele <karme@karme.de>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Testing has revealed that the temperature in the rtp controller of the A10
(sun4i) SoC has a different curve then on the A13 (sun5i) and later models.
Add a new sun5i-a13-ts compatible to differentiate the newer models and
set the curve based on the compatible string.
The new curve is still not ideal on all A10-s, that seems to have to
do with there being a large spread between different A10-s out there,
the new curve us based on callibration results on 4 completely different
models:
raw min raw max temp min temp max stepsize offset
Tong Zhang's hackberry 2402 2680 45.0 80.0 0.125 -255.3
Hansg's Cubieboard 2207 2300 36.0 45.0 0.096 -175.8
Olliver's lime 1 (*): 2258 2537 48.3 87.1 0.139 -265.7
Olliver's lime 2 (*): 2222 2486 46.7 91.7 0.170 -331.0
*) from: http://linux-sunxi.org/Temperature_Calibration
Average all 4: 0.133 -257.0
Average without outliers (middle 2): 0.132 -261.0
Since it is better to slightly overreport the temperature this patch uses
the average of all 4 as curve.
This fixes the temperature reported on the A10 being much higher then
expected.
Reported-by: Tong Zhang <lovewilliam@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This change adds device tree support and binding information for Goodix
GT9xx series touchscreen controller. It also adds support for 5-finger
chips, like GT911 and GT912, which can be found on ARM tablets, such as
Wexler TAB7200 and MSI Primo73.
Datasheets can be found here:
https://drive.google.com/folderview?id=0BxCVOQS3ZymGfmJyY2RKbE5XbVlKNlktVTlwV0lxNEdxd2dzeWZER094cmJPVnMxN1F0Yzg&usp=sharing
Signed-off-by: Aleksei Mamlin <mamlinav@gmail.com>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This patch reads charge delay from tsc DT node and writes to
REG_CHARGEDELAY register. If the charge delay is not specified in DT then
default value of 0x400(CHARGEDLY_OPENDLY) is used.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The Allwinner A31 SoC (sun6i) has the same resistive touchpanel controller
as on other sunxi platforms. The only difference between the variants is
the control bits for enabling operations are left-shifted by 1 on the A31.
Also update the comment for the original temperature sensor with
information from Allwinner.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The touchscreen controller has a temperature sensor embedded in the SoC,
which already has hwmon support in the driver.
Add DT thermal zone support so we can use it with cpufreq for thermal
throttling.
This also adds a comment stating that we do not know the actual formula
for calculating the temperature.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Provide device tree support and binding information. Also provide support
for a new chip "pixcir_tangoc".
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
It's possible that the controller has an individually switchable power supply.
Therefore add support to control a supplying regulator.
As this is not always the case, the regulator is requested as optional.
Signed-off-by: Heiko Stuebner <heiko.stuebner@bq.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This adds DT support to the tsc2005 touchscreen driver. It also adds
regulator support to the driver if booted via DT.
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Add common DT binding documentation for touchscreen devices and
implement input_parse_touchscreen_of_params, which parses the common
properties and configures the input device accordingly.
The method currently does not interpret the axis inversion properties,
since there is no matching flag in the generic linux input device.
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
The sun4i resisitive touchscreen controller also comes with a built-in
temperature sensor. This commit adds support for it.
This commit also introduces a new "ts-attached" device-tree property,
when this is not set, the input part of the driver won't register. This way
the internal temperature sensor can be used to measure the SoC temperature
independent of there actually being a touchscreen attached to the controller.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Note the sun4i-ts controller is capable of detecting a second touch, but
when a second touch is present then the accuracy becomes so bad the
reported touch location is not useable.
The original android driver contains some complicated heuristics using the
aprox. distance between the 2 touches to see if the user is making a pinch
open / close movement, and then reports emulated multi-touch events around
the last touch coordinate (as the dual-touch coordinates are worthless).
These kinds of heuristics are just asking for trouble (and don't belong in
the kernel). So this driver offers straight forward, reliable single touch
functionality only.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This makes the zforce driver usable on devicetree-based platforms too.
Signed-off-by: Heiko Stuebner <heiko.stuebner@bqreaders.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
There was a spelling mistake on TSC/ADC binding where "coordinate" was
spelled as "coordiante".
We can't simply fix the error due to DT being an ABI, the approach taken
was to first use correct spelling and if that fails, fall back to
miss-spelled version.
It's unfortunate that has creeped into the tree.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Merge tag 'v3.11' into next
Merge with mainline to bring in sync changes to cyttsp4 driver.
This patch adds DT support to touch driver. It also provides a binding
document which is used by the MFD and IIO part of the device.
This patch also renames steps_to_configure to coordinate_readouts
because the original name misleads the purpose of the variable.
Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: Patil, Rachna <rachna@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We add the possibility to hand over a GPIO number for the reset pin.
This way we can remove existing board code that takes care of it and
group this information properly in the platform data or in the device
tree configuration.
Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Merge tag 'v3.9-rc3' into next
Merge with mainline to bring in module_platform_driver_probe() and
devm_ioremap_resource().
Add the necessary code to create the needed platformdata from devicetree
informations.
The interrupt mode of the chip is not set via devicetree, as it is not
a property of the hardware but instead only a preferred type of operation.
This should probably be made settable via configfs in the future.
The option set as default is the mode the datasheet mentions as default.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Pull second round of input updates from Dmitry Torokhov:
"As usual, there are a couple of new drivers, input core now supports
managed input devices (devres), a slew of drivers now have device tree
support and a bunch of fixes and cleanups."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (71 commits)
Input: walkera0701 - fix crash on startup
Input: matrix-keymap - provide a proper module license
Input: gpio_keys_polled - switch to using gpio_request_one()
Input: gpio_keys - switch to using gpio_request_one()
Input: wacom - fix touch support for Bamboo Fun CTH-461
Input: xpad - add a few new VID/PID combinations
Input: xpad - minor formatting fixes
Input: gpio-keys-polled - honor 'autorepeat' setting in platform data
Input: tca8418-keypad - switch to using managed resources
Input: tca8418_keypad - increase severity of failures in probe()
Input: tca8418_keypad - move device ID tables closer to where they are used
Input: tca8418_keypad - use dev_get_platdata() to retrieve platform data
Input: tca8418_keypad - use a temporary variable for parent device
Input: tca8418_keypad - add support for shared interrupt
Input: tca8418_keypad - add support for device tree bindings
Input: remove Compaq iPAQ H3600 (Bitsy) touchscreen driver
Input: bu21013_ts - add support for Device Tree booting
Input: bu21013_ts - move GPIO init and exit functions into the driver
Input: bu21013_ts - request regulator that actually exists
ARM: ux500: Strip out duplicate touch screen platform information
...
This patch allows the STMPE Touchscreen driver to be successfully probed and
initialised when Device Tree support is enabled. Bindings are mentioned in
Documentation too.
Signed-off-by: Vipul Kumar Samar <vipulkumar.samar@st.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Merge tag 'v3.7-rc4' into next to sync up Wacom bits
Linux 3.7-rc4
From Lee Jones:
* 'ste-dt-for-next' of git://git.linaro.org/people/ljones/linux-3.0-ux500: (31 commits)
ARM: ux500: Convert DT_MACHINE_START to use SMP operations
ARM: ux500: CONFIG: Enable GPIO Regulators
ARM: ux500: Change the type of interrupt to something compatible
ARM: ux500: Add node for the MMC GPIO regulator
ARM: ux500: List DT compatibility using platform names rather than by board
ARM: ux500: Remove duplicate DT_MACHINE_START - make u8500 for generic
ARM: ux500: Rename references to the ccu9540 dev board accordingly
ARM: ux500: Enable all MMC devices on the u9540 when booting with DT
ARM: ux500: Enable SDI4 port on the u9540 when booting with Device Tree
ARM: ux500: Add UART support to the u9540 Device Tree
ARM: ux500: Add support for ST-Ericsson's u9540 SoC
ARM: ux500: Add skeleton DTS file for the u9540
ARM: ux500: Remove unused board compatible string
ARM: ux500: Supply the STMPE keypad Device Tree node to the STUIB DT
ARM: ux500: Apply a Device Tree node for the STMPE MFD
ARM: ux500: Stop informing the regulator subsystem that we have full constraints
ARM: ux500: Add all bu21013 touch screen components to supported Device Trees
ARM: ux500: Stop calling the UIB init function when using Device Tree
ARM: ux500: Create a new Device Tree include file for boards supporting STUIBs
Documentation: Detail permitted DT properties for the BU21013 Touch Screen
...
Here we apply required documentation for the Rohm BU21013 Touch
Screen driver which describe available properties and how to use
them.
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org
Cc: devicetree-discuss@lists.ozlabs.org
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
The irq_to_gpio() is old, most platforms use GENERIC_GPIO framework
and don't support this API anymore.
The i.MX6q sabrelite platform equips an egalax touchscreen controller,
and this platform already transfered to GENERIC_GPIO framework, to
support this driver, we use a more generic way to get gpio.
Add a return value checking for waking up the controller in the probe
function, this guarantee only a workable device can pass init.
[dmitry.torokhov@gmail.com: Make driver depend on CONFIG_OF as it is
now required.]
Acked-by Zhang Jiejing <jiejing.zhang@freescale.com>
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Hui Wang <jason77.wang@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
