linux-kernel - Re: [RESEND PATCH 2/3] regulator: Add support for stm32-vrefbuf

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Date:   Wed, 30 Aug 2017 16:02:49 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Fabrice Gasnier <fabrice.gasnier@...com>
Cc:     lgirdwood@...il.com, robh+dt@...nel.org, alexandre.torgue@...com,
        mark.rutland@....com, mcoquelin.stm32@...il.com,
        linux@...linux.org.uk, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH 2/3] regulator: Add support for stm32-vrefbuf

On Wed, Aug 30, 2017 at 11:11:24AM +0200, Fabrice Gasnier wrote:
> On 08/29/2017 08:57 PM, Mark Brown wrote:
> > On Mon, Aug 28, 2017 at 02:58:52PM +0200, Fabrice Gasnier wrote:

> >> +static int __init stm32_vrefbuf_init(void)
> >> +{
> >> +	return platform_driver_register(&stm32_vrefbuf_driver);
> >> +}
> >> +subsys_initcall(stm32_vrefbuf_init);

> > Why is this at subsys_initcall()?

> Several consumers depend on it when it's being used, among which: STM32
> internal ADC and DAC, but also external components. Purpose is to ensure
> it's ready before these drivers gets probed, instead of being deferred.
> Is it ok to keep it ?

No, that's not OK - just let deferred probe handle it.  The same thing
applies to all regulator usage.

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