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From: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Ulf Hansson <ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Cc: Addy Ke <addy.ke-TNX95d0MmH7DzftRWevZcw@public.gmane.org>,
	Andrew Gabbasov
	<andrew_gabbasov-nmGgyN9QBj3QT0dZR+AlfA@public.gmane.org>,
	Alexandru Stan <amstan-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
	"open list:ARM/Rockchip SoC..."
	<linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
	Seungwon Jeon <tgih.jun-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
	"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>,
	linux-mmc <linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Doug Anderson <dianders-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
	Chris Ball <chris-OsFVWbfNK3isTnJN9+BGXg@public.gmane.org>,
	Jaehoon Chung
	<jh80.chung-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
	Andrew Bresticker
	<abrestic-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
	Tim Kryger <tim.kryger-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Alim Akhtar <alim.akhtar-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
	Johan Rudholm <johan.rudholm-VrBV9hrLPhE@public.gmane.org>,
	Adrian Hunter
	<adrian.hunter-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Sonny Rao <sonnyrao-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
	Javier Martinez Canillas
	<javier.martinez-ZGY8ohtN/8pPYcu2f3hruQ@public.gmane.org>,
	"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
	<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
	Heiko Stuebner <heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org>
Subject: Re: [PATCH v4 2/4] mmc: core: Add mmc_regulator_set_vqmmc()
Date: Thu, 19 Mar 2015 11:36:46 +0000	[thread overview]
Message-ID: <20150319113646.GQ2869@sirena.org.uk> (raw)
In-Reply-To: <CAPDyKFrkznbW7k_=BDo99jJhWzDbUgbeU+MXWB_E_UWXh=56Eg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>


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On Thu, Mar 19, 2015 at 12:14:11PM +0100, Ulf Hansson wrote:

> Agree. Moreover we need that API to also pick the closest value to
> target, when trying the range "target->minimum". I also believe it

The implementation *should* do that anyway, it's just not trivial to
implement in an efficient fashion with the current information we have
from drivers.

> would be good to allow both upper and lower limits to be zero.

The lower limit can be zero already though it isn't clear to me that
this is useful.  Setting an upper limit of zero seems nonsensical, an
upper limit that is lower than the lower limit isn't terribly obvious
and removing the upper limit isn't safe - it means that we'll happily
oversupply things which is a road to physical damage.

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  parent reply	other threads:[~2015-03-19 11:36 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-11 22:15 [PATCH v4 1/4] mmc: dw_mmc: Don't try to enable the CD until we're sure we're not deferring Doug Anderson
2015-03-11 22:15 ` [PATCH v4 2/4] mmc: core: Add mmc_regulator_set_vqmmc() Doug Anderson
2015-03-16 14:05   ` Ulf Hansson
2015-03-16 15:12     ` Doug Anderson
2015-03-17 10:23       ` Ulf Hansson
2015-03-17 10:38         ` Mark Brown
2015-03-17 11:28           ` Ulf Hansson
2015-03-19  4:09         ` Doug Anderson
2015-03-19 11:14           ` Ulf Hansson
     [not found]             ` <CAPDyKFrkznbW7k_=BDo99jJhWzDbUgbeU+MXWB_E_UWXh=56Eg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-03-19 11:36               ` Mark Brown [this message]
2015-03-20 10:55                 ` Ulf Hansson
     [not found]                   ` <CAPDyKFroe9N3j9oMWKknH5huv7j8fkrBr5UKjjp190hkqNsNRg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-03-20 11:28                     ` Mark Brown
2015-04-07 20:05                       ` Doug Anderson
     [not found]                         ` <CAD=FV=WpDE_iEFWFw094WBfBH2TgRi+1OGk3E3qQ3t1EfyrnJA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-08 11:28                           ` Mark Brown
2015-03-11 22:15 ` [PATCH v4 3/4] mmc: dw_mmc: Use mmc_regulator_set_vqmmc in start_signal_voltage_switch Doug Anderson
2015-03-13 11:32 ` [PATCH v4 1/4] mmc: dw_mmc: Don't try to enable the CD until we're sure we're not deferring Jaehoon Chung
2015-03-13 12:10   ` Heiko Stuebner
2015-03-16  2:09     ` Jaehoon Chung
2015-03-27  5:55 ` Jaehoon Chung
2015-03-27 15:46   ` Doug Anderson

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