linux-toradex.git/drivers/input/touchscreen/silead.c, branch v4.19

Input: silead - add MSSL0002 ACPI HID

2018-06-05T17:29:38+00:00

The Silead touchscreen on the Chuwi Vi8 tablet uses MSSL0002 as ACPI HID,
rather then the usual MSSL1680 id.

Signed-off-by: Hans de Goede 
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov

Input: silead - add Chuwi Hi8 support

2018-03-14T16:56:31+00:00

This commit add ACPI support for Chuwi Hi8 tablet. On the ACPI table of
the tablet, GSL1680 is registered as MSSL0001, so the driver does not
recognize the device. This commit resolve it.

Signed-off-by: Shohei Maruyama 
Reviewed-by: Hans de Goede 
Signed-off-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov

Input: silead - add support for capactive home button found on some x86 tablets

2018-01-10T00:38:06+00:00

On some x86 tablets with a silead touchscreen the windows logo on the
front is a capacitive home button. Touching this button results in a touch
with bits 12-15 of the Y coordinates set, while normally only the lower 12
are used.

Detect this and report a KEY_LEFTMETA press when this happens. Note for
now we only respond to the Y coordinate bits 12-15 containing 0x01, on some
tablets *without* a capacative button I've noticed these bits containing
0x04 when crossing the edges of the screen.

Acked-by: Rob Herring 
Signed-off-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov

Input: silead - disable interrupt during suspend

2017-05-30T02:58:25+00:00

When we put the touchscreen controller in low-power mode the irq
pin may trigger (float) and if we then try to read a data packet we
get the following error in dmesg:

[  478.801017] silead_ts i2c-MSSL1680:00: Data read error -121

This commit disables the irq during suspend/resume fixing this error.

Signed-off-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov

Input: silead - add OF device ID table

2017-03-23T21:46:31+00:00

The driver doesn't have a struct of_device_id table but supported devices
are registered via Device Trees. This is working on the assumption that a
I2C device registered via OF will always match a legacy I2C device ID and
that the MODALIAS reported will always be of the form i2c:.

But this could change in the future so the correct approach is to have an
OF device ID table if the devices are registered via OF.

As pointed by Hans de Goede, there's no mssl1680 and this is just used in
some ACPI systems to identify the gsl1680 chip. So isn't included in the
OF device ID table since a DT should use the proper device name instead.

Signed-off-by: Javier Martinez Canillas 
Signed-off-by: Dmitry Torokhov

Input: silead - add regulator support

2016-11-17T00:59:55+00:00

On some tablets the touchscreen controller is powered by separate
regulators, add support for this.

Signed-off-by: Hans de Goede 
Acked-by: Rob Herring 
Signed-off-by: Dmitry Torokhov

Input: silead_gsl1680 - use "silead/" prefix for firmware loading

2016-09-10T17:49:15+00:00

The silead touch-controller ICs use a different firmware per digitizer /
tablet model. So there are going to be quite a few of then and they really
should be under a separate subdir.

This commit prefixes the default firmware names with "silead/" just like
we are already doing for devicetree specified firmware names.

Signed-off-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov

Input: silead_gsl1680 - document firmware-name, fix implementation

2016-09-10T17:49:12+00:00

The driver has supported touchscreen-fw-name to specify the firmware to
load since it has been merged, but this was omitted from the dt-binding
documentation.

During review of adding touchscreen-fw-name to the binding documentation
it was brought up that there is a standard property name called
"firmware-name" for this, which should be used.

Since there are no users of touchscreen-fw-name yet, this commit
adds documentation of "firmware-name" to the dt-binding documentation
and switches the driver over to use this.

This commit also makes the driver add a "silead/" prefix to the
firmware name from dt before calling request_firmware. That the
firmware files are stored under /lib/firmware/silead under Linux
is an implementation detail and does not belong in devicetree.

Signed-off-by: Hans de Goede 
Acked-by: Rob Herring 
Signed-off-by: Dmitry Torokhov

Input: silead - use devm_gpiod_get

2016-08-22T21:14:15+00:00

The silead code is using devm_foo for everything (and does not free
any resources). Except that it is using gpiod_get instead of
devm_gpiod_get (but is not freeing the gpio_desc), change this
to use devm_gpiod_get so that the gpio will be properly released.

Signed-off-by: Hans de Goede 
Signed-off-by: Dmitry Torokhov

Input: silead - remove some dead code

2016-08-04T15:28:11+00:00

buf[0] is an unsigned char.  touch_nr is an int.  The test for negative
here doesn't make sense so I have removed it.

Signed-off-by: Dan Carpenter 
Signed-off-by: Dmitry Torokhov