linux-kernel - Re: [PATCH v2 01/11] base: power: Add generic OF-based power domain look-up

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Date:	Tue, 4 Mar 2014 10:23:10 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Tomasz Figa <tomasz.figa@...il.com>
Cc:	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Pavel Machek <pavel@....cz>, Len Brown <len.brown@...el.com>,
	Russell King <linux@....linux.org.uk>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Kumar Gala <galak@...eaurora.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Tomasz Figa <t.figa@...sung.com>,
	Mark Brown <broonie@...nel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH v2 01/11] base: power: Add generic OF-based power domain
 look-up

On 03/03, Tomasz Figa wrote:
> diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
> index dc127e5..006b455 100644
> --- a/drivers/base/power/domain.c
> +++ b/drivers/base/power/domain.c
> @@ -3,12 +3,16 @@
>   *
>   * Copyright (C) 2011 Rafael J. Wysocki <rjw@...k.pl>, Renesas Electronics Corp.
>   *
> + * Support for Device Tree based power domain providers:
> + * Copyright (C) 2014 Tomasz Figa <tomasz.figa@...il.com>
> + *
>   * This file is released under the GPLv2.
>   */
>  
>  #include <linux/init.h>
>  #include <linux/kernel.h>
>  #include <linux/io.h>
> +#include <linux/platform_device.h>

Is this still needed?

>  #include <linux/pm_runtime.h>
>  #include <linux/pm_domain.h>
>  #include <linux/pm_qos.h>
[...]
> +
> +/*
> + * DEVICE<->DOMAIN BINDING USING DEVICE TREE LOOK-UP
> + *
> + * The code below registers a notifier for platform bus devices'
> + * BUS_NOTIFY_BIND_DRIVER events and tries to attach devices to their power
> + * domains by looking them up using Device Tree.
> + *
> + * Similarly in BUS_NOTIFY_UNBOUND_DRIVER the device is detached from its
> + * domain, since it no longer supports runtime PM without any driver bound
> + * to it.

This looks outdated.

> + *
> + * Both generic and legacy Samsung-specific DT bindings are supported to
> + * keep backwards compatibility with existing DTBs.
> + */
-- 
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