[Cocci] convert struct deref to function call?

[ron minnich]

I have this struct:

struct ahba {
uint32_t x;
}

given this:
struct ahba *h;

I want to convert derefs of h->x to turn into mmio_read32(&h->x);
h->x = y;
to
mmio_write32(&h->x, y);

but I'm failing :-)

Any hints welcome.

thanks

ron

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