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75996c92f4This driver is used to control the power state of the devices attached to the PCI slots. Currently, it controls the voltage rails of the PCI slots defined in the devicetree node of the root port. The voltage rails for PCI slots are documented in the DT-schema: https://github.com/devicetree-org/dt-schema/blob/v2024.11/dtschema/schemas/pci/pci-bus-common.yaml#L153 Since this driver has to work with different kind of slots (PCIe x1/x4/x8/x16, Mini PCIe, PCI, etc.), the driver is thus using the of_regulator_bulk_get_all() API to obtain the voltage regulators defined in the DT node, instead of hardcoding them. As such, the DT node of the root port should define the relevant supply properties corresponding to the voltage rails of the PCI slot. Tested-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Link: https://lore.kernel.org/r/20250116-pci-pwrctrl-slot-v3-5-827473c8fbf4@linaro.org [kwilczynski: commit log] Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.