On Wed, Aug 8, 2012 at 11:19 AM, Arnd Bergmann [off-list ref] wrote:

quoted

What on earth are all those magic numbers?

I *guess* they're enabling some default GPIO settings etc.

No, they are the register offsets you quoted above, per bank.

Aha I was fooled by this:

+struct vt8500_gpio_bank_regs {
+       int     en;
+       int     dir;
+       int     data_out;
+       int     data_in;
+       int     ngpio;
+};

This needs to be named something intuitive like "vt8500_gpio_bank_regoffsets"

Some kerneldoc intsead of the opaque comment above will also improve
readability a lot:

/**
  * struct vt8500_gpio_bank_regoffsets
  * @en: offset to enable register in the bank
  * ...

Yours,
Linus Walleij