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The driver has been using the "enable-gpios" property to control the 3v3 power supply of PCIe slots. But it is not documented in the dt-bindings and also using GPIO APIs is not a standard way to control PCIe slot power, so use the documented "vpcie3v3-supply" property and regulator APIs to control the slot supply. This change will break the DTs which used "enable-gpio" or "enable-gpios" property under the controller node. Since these properties were not defined in the bindings, it is safe to switch to "vpcie3v3-supply". Any out-of-tree DTS impacted by this change should migrate to "vpcie3v3-supply" instead. Signed-off-by: Hal Feng <hal.feng@starfivetech.com> [mani: reworded description] Signed-off-by: Manivannan Sadhasivam <mani@kernel.org> Acked-by: Kevin Xie <kevin.xie@starfivetech.com> Link: https://patch.msgid.link/20251218102149.28062-1-hal.feng@starfivetech.com