Baochen Qiang <quic_bqiang@xxxxxxxxxxx> wrote: > MHI devices may not be destroyed during suspend/hibernation, so need > to unprepare/prepare MHI channels throughout the transition, this is > done by adding suspend/resume callbacks. > > The suspend callback is called in the late suspend stage, this means > MHI channels are still alive at suspend stage, and that makes it > possible for an MHI controller driver to communicate with others over > those channels at suspend stage. While the resume callback is called > in the early resume stage, for a similar reason. > > Also note that we won't do unprepare/prepare when MHI device is in > suspend state because it's pointless if MHI is only meant to go through > a suspend/resume transition, instead of a complete power cycle. > > Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30 > > Signed-off-by: Baochen Qiang <quic_bqiang@xxxxxxxxxxx> > Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> > Reviewed-by: Jeff Johnson <quic_jjohnson@xxxxxxxxxxx> > Signed-off-by: Kalle Valo <quic_kvalo@xxxxxxxxxxx> 2 patches applied to ath-next branch of ath.git, thanks. e0cd1185900e net: qrtr: support suspend/hibernation 166a490f59ac wifi: ath11k: support hibernation -- https://patchwork.kernel.org/project/linux-wireless/patch/20240305021320.3367-3-quic_bqiang@xxxxxxxxxxx/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
