[Gta04-owner] bq27x00 driver for Replicant

[Alexandre Roumiantsev]

Hello

I have try this change:

> And found that there is a slightly (or significantly) different rule when to report power_supply_changed()
> 
> We have:
> 
> 
> 	flags_changed = di->cache.flags ^ cache.flags;
> 	di->cache = cache;
> 	if (is_bq27500)
> 		flags_changed &= BQ27500_FLAGS_IMPORTANT;
> 	else
> 		flags_changed &= BQ27000_FLAGS_IMPORTANT;
> 	if (flags_changed)
> 		power_supply_changed(&di->bat);
> 
> Linus/master has:
> 
> 	if (memcmp(&di->cache, &cache, sizeof(cache)) != 0) {
> 		di->cache = cache;
> 		power_supply_changed(&di->bat);
> 	}
> 
> So our driver reports only changes in *important* flags. And nothing else. And *important*
> is mainly the charging status as seen by the bq27x00 chip.

For me it looks work well even with poll_interval = 360;
For test You can try the build:
https://drive.google.com/file/d/0B-rRgKAzYyoBYUo0MnN4OEN4dUU/edit?usp=sharing

So small step ahead have done. Thank to all.

Best regards, Alexandre.
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