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

[Dann Frazier]

On Tue, Jun 9, 2015 at 9:31 AM, Dann Frazier <dann.frazier at canonical.com> wrote:
> On Mon, Jun 8, 2015 at 10:34 PM, Tai Tri Nguyen <ttnguyen at apm.com> wrote:
>> Hi Dann,
>>
>> On Mon, Jun 8, 2015 at 8:44 PM, Dann Frazier <dann.frazier at canonical.com> wrote:
>>> On Tue, Jun 2, 2015 at 1:19 PM, Tai Nguyen <ttnguyen at apm.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 at canoncial.com>

>   -dann
>
>> Tai
>>
>>
>>>> Signed-off-by: Tai Nguyen <ttnguyen at apm.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 at 10548000 {
>>>> +               compatible = "syscon";
>>>> +               reg = <0x0 0x10548000 0x0 0x30>;
>>>> +       };
>>>> +
>>>> +       poweroff: poweroff at 10548010 {
>>>> +               compatible = "syscon-poweroff";
>>>> +               regmap = <&poweroff_mbox>;
>>>> +               offset = <0x10>;
>>>> +               mask = <0x1>;
>>>> +       };
>>>>  };
>>>>
>>>>  &pcie0clk {
>>>> --
>>>> 1.7.9.5
>>>>
>>>>
>>>> _______________________________________________
>>>> linux-arm-kernel mailing list
>>>> linux-arm-kernel at lists.infradead.org
>>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>
>>
>>
>> --
>> Tai