[PATCH 3/4 v3] PCI: s32g: Add initial PCIe support (RC)

[Christian Bruel]

>>
>> The implication is that *every* user of dw_pcie_suspend_noirq() would
>> have to check for the link being up.  There are only three existing
>> callers:
>>
>>    imx_pcie_suspend_noirq()
>>    ls_pcie_suspend_noirq()
>>    stm32_pcie_suspend_noirq()
>>
>> but none of them checks for the link being up.
>>

stm32 supports L1.1, so we bail out before pme_turn_off() in 
dw_pcie_suspend_noirq()

> 
> If no devices are attached to the bus, then there is no need to broadcast
> PME_Turn_Off and wait for L2/L3. I've just sent out a series that fixes it [1].
> Hopefully, this will allow Vincent to use dw_pcie_{suspend/resume}_noirq() APIs.
> 
> - Mani
> 
> [1] https://lore.kernel.org/linux-pci/20251106061326.8241-1-manivannan.sadhasivam@oss.qualcomm.com/

dw_pcie_suspend_noirq() path tested OK on stm32mp2.

Regards

Christian