Hello Nick,

On 08/15/2014 06:08 PM, Nick Dyer wrote:

quoted

Any comments on this? I would really appreciate if you can expand on how
this DT property is supposed to be used so I can re-spin the atmel support
patch for Peach boards.

The below patch improves the documentation for the gpio-property. Stephen
Warren has a good example here:
https://github.com/swarren/linux-tegra/commit/09789801

trackpad@4b {
  compatible = "atmel,maxtouch";
  reg = <0x4b>;
  interrupt-parent = <&gpio>;
  interrupts = <TEGRA_GPIO(W, 3) IRQ_TYPE_LEVEL_LOW>;
  linux,gpio-keymap = <0 0 0 BTN_LEFT>;
};

This maps BTN_LEFT to the 4th bit of the T19 message. I haven't looked up
what GPIO number that corresponds to on the mXT224SL that he has, it varies
with the particular maXTouch device you have.

Hope this helps.

Thanks a lot for the patch and the pointer to Stephen's DTS. I'll do some
experimentation then to figure out the right values since I don't have
proper documentation. Fortunately the Chrome OS 3.8 downstream driver
works on -next so I can use evdev to compare if both drivers behave the same.

Signed-off-by: Nick Dyer <redacted>

Best regards,
Javier