linux-kernel - Re: [PATCH 01/44] kernel: Add support for poweroff handler call chain

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Message-ID: <20150618153003.GA19224@roeck-us.net>
Date:	Thu, 18 Jun 2015 08:30:03 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	linux-kernel@...r.kernel.org, linux-m32r-ja@...linux-m32r.org,
	linux-mips@...ux-mips.org, linux-efi@...r.kernel.org,
	linux-ia64@...r.kernel.org, Heiko Stuebner <heiko@...ech.de>,
	Len Brown <len.brown@...el.com>, linux-xtensa@...ux-xtensa.org,
	Pavel Machek <pavel@....cz>, devel@...verdev.osuosl.org,
	linux-s390@...r.kernel.org, lguest@...ts.ozlabs.org,
	linux-c6x-dev@...ux-c6x.org, linux-hexagon@...r.kernel.org,
	linux-sh@...r.kernel.org, Alexander Graf <agraf@...e.de>,
	linux-acpi@...r.kernel.org,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	xen-devel@...ts.xenproject.org, devicetree@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net,
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	linux-metag@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
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	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	linux-alpha@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Romain Perier <romain.perier@...il.com>,
	linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 01/44] kernel: Add support for poweroff handler call chain

On Wed, Jun 17, 2015 at 06:04:54PM -0700, Stephen Boyd wrote:
[ ... ]
> 
> What happened to this series? I want to add shutdown support to my
> platform and I need to write a register on the PMIC in one driver to
> configure it for shutdown instead of restart and then write an MMIO
> register to tell the PMIC to actually do the shutdown in another driver.
> It seems that the notifier solves this case for me, albeit with the
> slight complication that I need to order the two with some priority.
> 
Can you use the .shutdown driver callback instead ?

I see other drivers use that, and check for system_state == SYSTEM_POWER_OFF
to power off the hardware.

Guenter
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