linux-kernel - Re: [PATCH 2/2 RESEND] power: reset: Add syscon poweroff device node for APM X-Gene platform

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Message-ID: <CAAtXAHf28He+R6m6RZyVv3AdC4jSX9byxyB37h7tSPYdSGs+Fw@mail.gmail.com>
Date:	Wed, 10 Jun 2015 16:00:45 -0700
From:	Moritz Fischer <moritz.fischer@...us.com>
To:	Dann Frazier <dann.frazier@...onical.com>
Cc:	Tai Tri Nguyen <ttnguyen@....com>, arm@...nel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	patches <patches@....com>, Jon Masters <jcm@...hat.com>
Subject: Re: [PATCH 2/2 RESEND] power: reset: Add syscon poweroff device node
 for APM X-Gene platform

On Wed, Jun 10, 2015 at 12:13 PM, Dann Frazier
<dann.frazier@...onical.com> wrote:
> On Tue, Jun 9, 2015 at 9:31 AM, Dann Frazier <dann.frazier@...onical.com> wrote:
>> On Mon, Jun 8, 2015 at 10:34 PM, Tai Tri Nguyen <ttnguyen@....com> wrote:
>>> Hi Dann,
>>>
>>> On Mon, Jun 8, 2015 at 8:44 PM, Dann Frazier <dann.frazier@...onical.com> wrote:
>>>> On Tue, Jun 2, 2015 at 1:19 PM, Tai Nguyen <ttnguyen@....com> wrote:
>>>>> This patch adds syscon poweroff device node to support poweroff feature
>>>>> on APM X-Gene Mustang platform
>>>>
>>>> hey Tai,
>>>>  The reboot changes work just fine for me, but poweroff does not:
>>>>
>>>> [  OK  ] Reached target Final Step.
>>>>          Starting Power-Off...
>>>> reboot: Power down
>>>> Unable to poweroff system
>>>> Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000000
>>>>
>>>> CPU: 0 PID: 1 Comm: systemd-shutdow Tainted: G        W       4.1.0-rc7+ #1
>>>> Hardware name: APM X-Gene Mustang board (DT)
>>>> Call trace:
>>>> [<ffffffc00008990c>] dump_backtrace+0x0/0x11c
>>>> [<ffffffc000089a38>] show_stack+0x10/0x1c
>>>> [<ffffffc0005b447c>] dump_stack+0x88/0xc8
>>>> [<ffffffc0005b3374>] panic+0xe0/0x220
>>>> [<ffffffc0000b5f24>] do_exit+0x990/0x994
>>>> [<ffffffc0000d06bc>] SyS_reboot+0x14c/0x208
>>>> ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000000
>>>>
>>>>   -dann
>>>>
>>>
>>> Thanks for testing my patches.
>>> On APM X-Gene Mustang platform, power off circuit is controlled by firmware.
>>> It requires a firmware update to support power off feature.
>>> May I ask what firmware version you're running on?
>>
>> Sure, 1.15.12.
>
> Tai worked with me offline. For reference, this requires an updated
> SlimPro firmware in addition to the u-boot update. Verified it works
> for me after the update, so:
>
> Tested-by: dann frazier <dann.frazier@...oncial.com>

Looks good.

Acked-by: Moritz Fischer <moritz.fischer@...us.com>
>
>>   -dann
>>
>>> Tai
>>>
>>>
>>>>> Signed-off-by: Tai Nguyen <ttnguyen@....com>
>>>>> ---
>>>>>  arch/arm64/boot/dts/apm/apm-mustang.dts |   12 ++++++++++++
>>>>>  1 file changed, 12 insertions(+)
>>>>>
>>>>> diff --git a/arch/arm64/boot/dts/apm/apm-mustang.dts b/arch/arm64/boot/dts/apm/apm-mustang.dts
>>>>> index 83578e7..910d561 100644
>>>>> --- a/arch/arm64/boot/dts/apm/apm-mustang.dts
>>>>> +++ b/arch/arm64/boot/dts/apm/apm-mustang.dts
>>>>> @@ -23,6 +23,18 @@
>>>>>                 device_type = "memory";
>>>>>                 reg = < 0x1 0x00000000 0x0 0x80000000 >; /* Updated by bootloader */
>>>>>         };
>>>>> +
>>>>> +       poweroff_mbox: poweroff_mbox@...48000 {
>>>>> +               compatible = "syscon";
>>>>> +               reg = <0x0 0x10548000 0x0 0x30>;
>>>>> +       };
>>>>> +
>>>>> +       poweroff: poweroff@...48010 {
>>>>> +               compatible = "syscon-poweroff";
>>>>> +               regmap = <&poweroff_mbox>;
>>>>> +               offset = <0x10>;
>>>>> +               mask = <0x1>;
>>>>> +       };
>>>>>  };
>>>>>
>>>>>  &pcie0clk {
>>>>> --
>>>>> 1.7.9.5
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> linux-arm-kernel mailing list
>>>>> linux-arm-kernel@...ts.infradead.org
>>>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>>
>>>
>>>
>>> --
>>> Tai
> --
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