linux-kernel - Re: [PATCH v3 5/7] PCI/pwrctrl: Switch to the new pwrctrl APIs

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Message-ID: <CAMRc=McHOJ0FZTtvQeVqzqfd39eMP6z65ds3AAg2Ewb=Wn+zRQ@mail.gmail.com>
Date: Fri, 2 Jan 2026 13:56:40 +0000
From: Bartosz Golaszewski <brgl@...nel.org>
To: manivannan.sadhasivam@....qualcomm.com
Cc: Manivannan Sadhasivam via B4 Relay <devnull+manivannan.sadhasivam.oss.qualcomm.com@...nel.org>, 
	linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Chen-Yu Tsai <wens@...nel.org>, 
	Brian Norris <briannorris@...omium.org>, 
	Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>, Niklas Cassel <cassel@...nel.org>, 
	Alex Elder <elder@...cstar.com>, Bartosz Golaszewski <bartosz.golaszewski@...aro.org>, 
	Chen-Yu Tsai <wenst@...omium.org>, Manivannan Sadhasivam <mani@...nel.org>, 
	Lorenzo Pieralisi <lpieralisi@...nel.org>, Krzysztof Wilczyński <kwilczynski@...nel.org>, 
	Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, 
	Bartosz Golaszewski <brgl@...ev.pl>
Subject: Re: [PATCH v3 5/7] PCI/pwrctrl: Switch to the new pwrctrl APIs

On Mon, 29 Dec 2025 18:26:56 +0100, Manivannan Sadhasivam via B4 Relay
<devnull+manivannan.sadhasivam.oss.qualcomm.com@...nel.org> said:
> From: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
>
> Adopt the recently introduced pwrctrl APIs to create, power on, destroy,
> and power off pwrctrl devices. In qcom_pcie_host_init(), call
> pci_pwrctrl_create_devices() to create devices, then
> pci_pwrctrl_power_on_devices() to power them on, both after controller
> resource initialization. Once successful, deassert PERST# for all devices.
>
> In qcom_pcie_host_deinit(), call pci_pwrctrl_power_off_devices() after
> asserting PERST#. Note that pci_pwrctrl_destroy_devices() is not called
> here, as deinit is only invoked during system suspend where device
> destruction is unnecessary. If the driver becomes removable in future,
> pci_pwrctrl_destroy_devices() should be called in the remove() handler.
>
> At last, remove the old pwrctrl framework code from the PCI core (including
> devlinks) as the new APIs are now the sole consumer of pwrctrl
> functionality. And also do not power on the pwrctrl drivers during probe()
> as this is now handled by the APIs.
>
> Co-developed-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
> Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@....qualcomm.com>
> Tested-by: Chen-Yu Tsai <wenst@...omium.org>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@....qualcomm.com>
> ---

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>