Pavel Machek <pa...@ucw.cz> writes: > On Thu 2015-07-30 10:11:24, NeilBrown wrote: >> >> Add a 'continuous' option for usb charging which enables >> the "linear" charging mode of the twl4030. >> >> Linear charging does a good job with not-so-reliable power sources. >> Auto mode does not work well as it switches off when voltage drops >> momentarily. Care must be taken not to over-charge. > > Can you explain how the user can "care not to over-charge"?
The following text reads:
It was used with a bike hub dynamo since a year or so. In that case
there are automatically charging stops when the cyclist needs a break.
so: take a break from cycling occasionally.
>
>> @@ -750,6 +784,17 @@ static int twl4030_bci_get_property(struct power_supply
>> *psy,
>> is_charging = state & TWL4030_MSTATEC_USB;
>> else
>> is_charging = state & TWL4030_MSTATEC_AC;
>> + if (!is_charging) {
>> + u8 s;
>> + twl4030_bci_read(TWL4030_BCIMDEN, &s);
>> + if (psy->desc->type == POWER_SUPPLY_TYPE_USB)
>> + is_charging = s & 1;
>> + else
>> + is_charging = s & 2;
>> + if (is_charging)
>> + /* A little white lie */
>> + state = TWL4030_MSTATEC_QUICK1;
>
> I'm not sure... can't this white lie turn into black smoke?
>
> Like.. normally, when battery is below something (like 3.5V) it must
> not be quick-charged (because something is very wrong with it). Are
> you just forcing the quick charge here?
No. That value is only used for reporting a status via sysfs.
That 'lie' gets translated to "POWER_SUPPLY_STATUS_CHARGING" which is
not a lie.
Thanks,
NeilBrown
>
> Pavel
> --
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures)
> http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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