linux-kernel - Re: [PATCH/RFC v2] ARM: amba: Remove AMBA level regulator support

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Date:	Sun, 1 Apr 2012 21:22:50 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Russell King <linux@....linux.org.uk>,
	Grant Likely <grant.likely@...retlab.ca>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	linux-arm-kernel@...ts.infradead.org,
	spi-devel-general@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH/RFC v2] ARM: amba: Remove AMBA level regulator support

On Sun, Apr 1, 2012 at 8:58 PM, Mark Brown
<broonie@...nsource.wolfsonmicro.com> wrote:

> diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
> index ebc1e86..5be3248 100644
> --- a/drivers/mfd/db8500-prcmu.c
> +++ b/drivers/mfd/db8500-prcmu.c
> @@ -2788,6 +2788,7 @@ static struct regulator_init_data db8500_regulators[DB8500_NUM_REGULATORS] = {
>                .constraints = {
>                        .name = "db8500-vape",
>                        .valid_ops_mask = REGULATOR_CHANGE_STATUS,
> +                       .always_on = true,
>                },
>                .consumer_supplies = db8500_vape_consumers,
>                .num_consumer_supplies = ARRAY_SIZE(db8500_vape_consumers),

Combined with the PL022 patch this causes a power regression since
the PL022 is hereafter always on.

But I guess if I fix a power domain patch to accomplish much the
same things then nothing is really lost...

And I do like the change, if for nothing else so for the fact that it
eventually pushes to power domains what belongs there, so:
Acked-by: Linus Walleij <linus.walleij@...aro.org>

But to the defence: power domain code was not in the kernel
when the AMBA "vcore" regulator was introduced so how else
could we do it... except for inventing power domains...

Yours,
Linus Walleij
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