Re: [PATCH 01/44] kernel: Add support for poweroff handler call chain
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- To: Guenter Roeck <linux@xxxxxxxxxxxx>
- Subject: Re: [PATCH 01/44] kernel: Add support for poweroff handler call chain
- From: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
- Date: Thu, 18 Jun 2015 14:40:18 -0700
- Cc: linux-kernel@xxxxxxxxxxxxxxx, linux-m32r-ja@xxxxxxxxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxx, linux-efi@xxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, Heiko Stuebner <heiko@xxxxxxxxx>, Len Brown <len.brown@xxxxxxxxx>, linux-xtensa@xxxxxxxxxxxxxxxx, Pavel Machek <pavel@xxxxxx>, devel@xxxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, lguest@xxxxxxxxxxxxxxxx, linux-c6x-dev@xxxxxxxxxxxxx, linux-hexagon@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, Alexander Graf <agraf@xxxxxxx>, linux-acpi@xxxxxxxxxxxxxxx, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, devicetree@xxxxxxxxxxxxxxx, user-mode-linux-devel@xxxxxxxxxxxxxxxxxxxxx, linux-pm@xxxxxxxxxxxxxxx, adi-buildroot-devel@xxxxxxxxxxxxxxxxxxxxx, linux-m68k@xxxxxxxxxxxxxxx, linux-am33-list@xxxxxxxxxx, linux-tegra@xxxxxxxxxxxxxxx, openipmi-developer@xxxxxxxxxxxxxxxxxxxxx, linux-metag@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, linux-cris-kernel@xxxxxxxx, "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>, linux-alpha@xxxxxxxxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Romain Perier <romain.perier@xxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx
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On 06/18/2015 08:30 AM, Guenter Roeck wrote:
> 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.
>
Yes I think that will work. I'll still have to hook pm_power_off() for
the mmio register, but I guess that's ok and I don't need to worry about
this series then.
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