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From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Stephen Warren <swarren@wwwdotorg.org>
Cc: Lucas Stach <dev@lynxeye.de>,
	Pavan Kunapuli <pkunapuli@nvidia.com>,
	linux@arm.linux.org.uk, cjb@laptop.org,
	linux-tegra@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org
Subject: Re: [PATCH 2/2] mmc: sdhci: Defer probe if regulator_get fails
Date: Tue, 23 Oct 2012 18:07:39 +0100	[thread overview]
Message-ID: <20121023170723.GD4477@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <5086C5F5.4070801@wwwdotorg.org>

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On Tue, Oct 23, 2012 at 10:29:41AM -0600, Stephen Warren wrote:
> On 10/23/2012 01:57 AM, Lucas Stach wrote:

> > Does this work with boards where we don't have any MMC supplies? Or are
> > we just deferring the probe indefinitely there?

> > For boards that power MMC unconditionally, are we supposed to add dummy
> > regulators to make them work with this patchset?

> I believe that dummy (fixed) regulators are supposed to be provided in
> all cases where the platform doesn't actually have one. The fact that
> everything worked OK without them before this patch was most likely a
> mistake/accident.

That's the general idea; clearly there *are* supplies here, they're just
not software controlled supplies.

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WARNING: multiple messages have this Message-ID (diff)
From: broonie@opensource.wolfsonmicro.com (Mark Brown)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] mmc: sdhci: Defer probe if regulator_get fails
Date: Tue, 23 Oct 2012 18:07:39 +0100	[thread overview]
Message-ID: <20121023170723.GD4477@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <5086C5F5.4070801@wwwdotorg.org>

On Tue, Oct 23, 2012 at 10:29:41AM -0600, Stephen Warren wrote:
> On 10/23/2012 01:57 AM, Lucas Stach wrote:

> > Does this work with boards where we don't have any MMC supplies? Or are
> > we just deferring the probe indefinitely there?

> > For boards that power MMC unconditionally, are we supposed to add dummy
> > regulators to make them work with this patchset?

> I believe that dummy (fixed) regulators are supposed to be provided in
> all cases where the platform doesn't actually have one. The fact that
> everything worked OK without them before this patch was most likely a
> mistake/accident.

That's the general idea; clearly there *are* supplies here, they're just
not software controlled supplies.
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  reply	other threads:[~2012-10-23 17:07 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-23  7:18 [PATCH 0/2] mmc: sdhci: Defer probe if regulators are not registered Pavan Kunapuli
2012-10-23  7:18 ` Pavan Kunapuli
2012-10-23  7:18 ` Pavan Kunapuli
2012-10-23  7:18 ` [PATCH 1/2] ARM: dt: tegra: Add sdhci regulators Pavan Kunapuli
2012-10-23  7:18   ` Pavan Kunapuli
2012-10-23  7:18   ` Pavan Kunapuli
     [not found]   ` <1350976740-19284-2-git-send-email-pkunapuli-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-10-23 18:07     ` Marc Dietrich
2012-10-23 18:07       ` Marc Dietrich
2012-10-23 18:07       ` Marc Dietrich
2012-10-23 18:42       ` Stephen Warren
2012-10-23 18:42         ` Stephen Warren
2012-10-23 18:42         ` Stephen Warren
     [not found]         ` <5086E503.8090604-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-10-23 19:41           ` Marc Dietrich
2012-10-23 19:41             ` Marc Dietrich
2012-10-23 19:41             ` Marc Dietrich
2012-10-23  7:19 ` [PATCH 2/2] mmc: sdhci: Defer probe if regulator_get fails Pavan Kunapuli
2012-10-23  7:19   ` Pavan Kunapuli
2012-10-23  7:19   ` Pavan Kunapuli
2012-10-23  7:57   ` Lucas Stach
2012-10-23  7:57     ` Lucas Stach
2012-10-23  7:57     ` Lucas Stach
2012-10-23  8:16     ` Pavan Kunapuli
2012-10-23  8:16       ` Pavan Kunapuli
2012-10-23  8:16       ` Pavan Kunapuli
2012-10-23 16:29     ` Stephen Warren
2012-10-23 16:29       ` Stephen Warren
2012-10-23 16:29       ` Stephen Warren
2012-10-23 17:07       ` Mark Brown [this message]
2012-10-23 17:07         ` Mark Brown
     [not found]   ` <1350976740-19284-3-git-send-email-pkunapuli-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-10-23 13:21     ` Philip Rakity
2012-10-23 13:21       ` Philip Rakity
2012-10-23 13:21       ` Philip Rakity
     [not found]       ` <4F1DF342-A2C4-434A-B878-A11374089E6E-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2012-10-23 13:36         ` Russell King - ARM Linux
2012-10-23 13:36           ` Russell King - ARM Linux
2012-10-23 13:36           ` Russell King - ARM Linux
  -- strict thread matches above, loose matches on Subject: below --
2012-10-23  7:18 [PATCH 0/2] mmc: sdhci: Defer probe if regulators are not registered Pavan Kunapuli
2012-10-23  7:18 ` [PATCH 2/2] mmc: sdhci: Defer probe if regulator_get fails Pavan Kunapuli
2012-10-23  7:18   ` Pavan Kunapuli
2012-10-23 10:10   ` Jaehoon Chung
2012-10-23 10:17     ` Pavan Kunapuli
2012-10-23 16:23   ` Stephen Warren

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