how to check regmap start address

[Tomek The Messenger]

Hi
Let's see how it looks:
https://github.com/u-boot/u-boot/blob/master/include/regmap.h

I first time ever see such thing like this:
struct regmap_range {
ulong start;
ulong size;
};
struct regmap {
enum regmap_endianness_t endianness;
int range_count;
struct regmap_range ranges[0];
};

How I can get access to variable ranges it if is 0 size? Who develops this
one and who reviewed:)
Anyway If I have pointer to regmap can I check what is start variable in
some other way?
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