Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the usb gadget power negotation

From	NeilBrown <neilb@suse.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the usb gadget power negotation
Date	2016-09-14 20:00 +0200
Message-ID	<shmDw-3Sa-11@gated-at.bofh.it> (permalink)
References	(6 earlier) <sgBlf-548-9@gated-at.bofh.it> <sgQWZ-7Cf-1@gated-at.bofh.it> <shgoq-ao-27@gated-at.bofh.it> <shjcB-1Ui-3@gated-at.bofh.it> <shjPk-27U-11@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, Sep 14 2016, Mark Brown wrote:

> TI do a lot of the more software managed chargers (which I suspect are
> the main thing Felipe will have looked at) if that's what you're
> referring to here?  The device is implementing pretty much the algorithm
> you're describing in that e-mail so I'm a bit confused as to what you're
> saying here.

Ah.... my mistake, sorry.
When earlier you said:
>                                                                 It's a
> current limiter intended to sit in line with the USB power lines to
> ensure the system doesn't go over the maximum current draw (and also
> integrates with the power source selection logic the chip has to pick
> the best available power source for the system).

I assumed that all it did was limit the current to number given.
If it also limits the current to ensure that voltage doesn't drop
unduly, then I agree with your assertion that it just needs to be told
the upper limit.
I hope you'll agree that other drivers might need to know the lower
limit, so reporting both to all drivers is sensible.

Thanks,
NeilBrown

Thread

Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the usb gadget power negotation NeilBrown <neilb@suse.com> - 2016-09-10 00:00 +0200
  Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Mark Brown <broonie@kernel.org> - 2016-09-12 14:30 +0200
    Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the usb gadget power negotation NeilBrown <neilb@suse.com> - 2016-09-12 15:30 +0200
      Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Mark Brown <broonie@kernel.org> - 2016-09-12 17:30 +0200
        Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the usb gadget power negotation NeilBrown <neilb@suse.com> - 2016-09-13 10:10 +0200
          Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Mark Brown <broonie@kernel.org> - 2016-09-14 13:20 +0200
            Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the usb gadget power negotation NeilBrown <neilb@suse.com> - 2016-09-14 16:20 +0200
              Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Mark Brown <broonie@kernel.org> - 2016-09-14 17:00 +0200
                Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the usb gadget power negotation NeilBrown <neilb@suse.com> - 2016-09-14 20:00 +0200
                Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Mark Brown <broonie@kernel.org> - 2016-09-14 20:10 +0200
          Re: [PATCH v16 0/4] Introduce usb charger framework to deal with the  usb gadget power negotation Pavel Machek <pavel@ucw.cz> - 2016-09-15 12:40 +0200

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