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    SubjectRe: [PATCH 2/2 RESEND] power: reset: Add syscon poweroff device node for APM X-Gene platform
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    On Mon, Jun 8, 2015 at 10:34 PM, Tai Tri Nguyen <ttnguyen@apm.com> wrote:
    > Hi Dann,
    >
    > On Mon, Jun 8, 2015 at 8:44 PM, Dann Frazier <dann.frazier@canonical.com> wrote:
    >> On Tue, Jun 2, 2015 at 1:19 PM, Tai Nguyen <ttnguyen@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.

    -dann

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


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