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Power supply to the M.2 Bluetooth device attached to the host using M.2 connector is controlled using the 'uart' pwrseq device. So add support for getting the pwrseq device if the OF graph link is present. Once obtained, the existing pwrseq APIs can be used to control the power supplies of the M.2 card. Tested-by: Hans de Goede <johannes.goede@oss.qualcomm.com> # ThinkPad T14s gen6 (arm64) Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com> Link: https://patch.msgid.link/20260326-pci-m2-e-v7-6-43324a7866e6@oss.qualcomm.com Signed-off-by: Abel Vesa <abel.vesa@oss.qualcomm.com>