Input: goodix - add sysfs interface to dump config
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PATCH v12 1/5 Input: goodix - add sysfs interface to dump config
Quoted 10 lines · Irina Tirdea
Goodix devices have a configuration information register area that specifies various parameters for the device. ...
Export a sysfs interface that would allow reading the configuration information. ...
This sysfs interface will be exported only if the gpio pins are properly initialized from ACPI/DT. ...
Irina, why the requirement for INT/RST gpio pins? The config info is available by simply reading from the config register (0x8047) and IIUIC does not require presence of INT/RST pins. So, it can be exported even without those pins.
Likewise, config writing support currently present in the kernel (which I believe you are responsible for [thank you!]) also for some reason mandates presence of INT/RST. However, it is simply done by writing to the aforementioned config register (0x8047).
I have 2 similar devices (Pipo X8 and X9) with GT911 chips that have different configs. Neither device has the RST pin defined.
I was able to successfully read the config from one device and write it to the other. So, it seems the INT/RST requirement is not necessary for config reading/writing support. Or did I miss something.
Thank you.
Dimitry
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