Re: [PATCH] PCI/PM: Note that PME can be generated from D0

From: Rafael J. Wysocki
Date: Thu Oct 17 2019 - 10:26:08 EST


On Wed, Oct 16, 2019 at 9:44 PM Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote:
>
> From: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
>
> Per PCIe r5.0 sec 7.5.2.1, PME may be generated from D0, so update
> Documentation/power/pci.rst to reflect that.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>

Good catch:

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>

> ---
> Documentation/power/pci.rst | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/Documentation/power/pci.rst b/Documentation/power/pci.rst
> index db41a770a2f5..a90e82c70a3b 100644
> --- a/Documentation/power/pci.rst
> +++ b/Documentation/power/pci.rst
> @@ -130,8 +130,8 @@ a full power-on reset sequence and the power-on defaults are restored to the
> device by hardware just as at initial power up.
>
> PCI devices supporting the PCI PM Spec can be programmed to generate PMEs
> -while in a low-power state (D1-D3), but they are not required to be capable
> -of generating PMEs from all supported low-power states. In particular, the
> +while in any power state (D0-D3), but they are not required to be capable
> +of generating PMEs from all supported power states. In particular, the
> capability of generating PMEs from D3cold is optional and depends on the
> presence of additional voltage (3.3Vaux) allowing the device to remain
> sufficiently active to generate a wakeup signal.
> --
> 2.23.0.700.g56cf767bdb-goog
>