linux-kernel - Re: [PATCH V8 1/6] power: reset: Add generic SYSCON register mapped reset

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Message-ID: <20140709212723.GA6737@roeck-us.net>
Date:	Wed, 9 Jul 2014 14:27:23 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Feng Kan <fkan@....com>
Cc:	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	Catalin Marinas <catalin.marinas@....com>,
	David Woodhouse <dwmw2@...radead.org>,
	Arnd Bergmann <arnd@...db.de>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	patches <patches@....com>
Subject: Re: [PATCH V8 1/6] power: reset: Add generic SYSCON register mapped
 reset

On Wed, Jul 09, 2014 at 02:15:44PM -0700, Feng Kan wrote:
> On Tue, Jul 8, 2014 at 8:54 PM, Guenter Roeck <linux@...ck-us.net> wrote:
> > On 07/08/2014 07:15 PM, Feng Kan wrote:
> >>
> >> Add a generic SYSCON register mapped reset mechanism.
> >>
> >> Signed-off-by: Feng Kan <fkan@....com>
> >> ---
> >>   drivers/power/reset/Kconfig         |  6 +++
> >>   drivers/power/reset/Makefile        |  1 +
> >>   drivers/power/reset/syscon-reboot.c | 91
> >> +++++++++++++++++++++++++++++++++++++
> >>   3 files changed, 98 insertions(+)
> >>   create mode 100644 drivers/power/reset/syscon-reboot.c
> >>
> >> diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
> >> index bdcf517..5877b38 100644
> >> --- a/drivers/power/reset/Kconfig
> >> +++ b/drivers/power/reset/Kconfig
> >> @@ -80,3 +80,9 @@ config POWER_RESET_KEYSTONE
> >>         help
> >>           Reboot support for the KEYSTONE SoCs.
> >>
> >> +config POWER_RESET_SYSCON
> >> +       bool "Generic SYSCON regmap reset driver"
> >> +       depends on ARM || ARM64 || COMPILE_TEST
> >
> >
> > As written, this driver is really not generic but very arm specific.
> > I don't think COMPILE_TEST is a good idea either, since arm_pm_restart
> > is only defined for the arm architecture. Did you try compiling allmodconfig
> > or allyesconfig for, say, x86_64 with this patch applied ?
> >
> > I think this might benefit from using [1], which would make it really
> > generic.
> >
> > Guenter
> >
> > [1] http://www.spinics.net/lists/kernel/msg1780939.html
> This is great, I will base off this list. Did it make it to a branch anywhere?
> 
Still in review. I hope it will make it into 3.17.
Of course it might be useful if you (and others)
help making the case for it.

Thanks,
Guenter
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