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Message-ID: <20240605175757.GA733809@bhelgaas>
Date: Wed, 5 Jun 2024 12:57:57 -0500
From: Bjorn Helgaas <helgaas@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
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 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/
> 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.
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