linux-kernel - Re: [PATCH v8 15/17] PCI/pwrctl: add PCI power control core code

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Message-ID: <CAMRc=McKD=ZhGzRUeLezT3oKfreDWQeKBvuousf8zsQjJb1QMA@mail.gmail.com>
Date: Wed, 5 Jun 2024 20:05:06 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Bjorn Helgaas <helgaas@...nel.org>
Cc: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Marcel Holtmann <marcel@...tmann.org>, Luiz Augusto von Dentz <luiz.dentz@...il.com>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Balakrishna Godavarthi <quic_bgodavar@...cinc.com>, Rocky Liao <quic_rjliao@...cinc.com>, 
	Kalle Valo <kvalo@...nel.org>, Jeff Johnson <jjohnson@...nel.org>, 
	Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Bjorn Helgaas <bhelgaas@...gle.com>, Srini Kandagatla <srinivas.kandagatla@...aro.org>, 
	Elliot Berman <quic_eberman@...cinc.com>, Caleb Connolly <caleb.connolly@...aro.org>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
	Alex Elder <elder@...nel.org>, linux-arm-msm@...r.kernel.org, 
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org, 
	linux-wireless@...r.kernel.org, ath11k@...ts.infradead.org, 
	Jeff Johnson <quic_jjohnson@...cinc.com>, ath12k@...ts.infradead.org, 
	linux-pm@...r.kernel.org, linux-pci@...r.kernel.org, 
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>, kernel@...cinc.com, 
	Amit Pundir <amit.pundir@...aro.org>
Subject: Re: [PATCH v8 15/17] PCI/pwrctl: add PCI power control core code

On Wed, Jun 5, 2024 at 7:58 PM Bjorn Helgaas <helgaas@...nel.org> wrote:
>
> On Tue, May 28, 2024 at 09:03:23PM +0200, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> >
> > Some PCI devices must be powered-on before they can be detected on the
> > bus. Introduce a simple framework reusing the existing PCI OF
> > infrastructure.
> >
> > The way this works is: a DT node representing a PCI device connected to
> > the port can be matched against its power control platform driver. If
> > the match succeeds, the driver is responsible for powering-up the device
> > and calling pcie_pwrctl_device_set_ready() which will trigger a PCI bus
>
> s/pcie_pwrctl_device_set_ready/pci_pwrctl_device_set_ready/
>

Ah that's a leftover from when it was PCIe specific. Thanks.

Bart

> > rescan as well as subscribe to PCI bus notifications.
> >
> > When the device is detected and created, we'll make it consume the same
> > DT node that the platform device did. When the device is bound, we'll
> > create a device link between it and the parent power control device.