[Bug 213579] Clevo NH55HJ (intel tigerlake) touchpad support (GPIO can't be used as IRQ)

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https://bugzilla.kernel.org/show_bug.cgi?id=213579

--- Comment #39 from Riccardo Mori (patacca@xxxxxxxxxxxxx) ---
(In reply to Rod Thomas from comment #37)
> a) Where 44 comes from - is this the GPIO pin that corresponds to acpi pin
> 57?

You can find the mappings with `cat /sys/kernel/debug/pincntrl/INT346\:00/pins`
For example let's analyze the row for pin 57:
`pin 57 (SLP_S0B) 44:INT34C6:00 mode 1 0x44000700 0x00000051 0x00000000 [LOCKED
full, ACPI]`
You can see that it is referring to line SLP_S0B, it is mapped to GPIO 44 and
is not in GPIO mode (mode 1) and is fully locked and has ACPI ownership.
In contrast pin 37:
`pin 37 (CLKOUT_48) 140:INT34C6:00 GPIO 0x40800102 0x0000003d 0x00000000
[LOCKED tx]`
it is referring to line CLKOUT_48, it is mapped to GPIO 140, it is in GPIO mode
and ACPI has no ownership of it


> Sorry to be a noob but just want to understand this before I embark on my
> first > kernel build.

I see you are using an archlinux based distro so you might find useful this
repo I just created to build linux with this hack:
https://github.com/patacca/linux-tigerlake-hack

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