ata: ahci: Add Tiger Lake UP{3,4} AHCI controller

Mark the Tiger Lake UP{3,4} AHCI controller as "low_power". This enables S0ix to work out of the box. Otherwise this isn't working unless the user manually sets /sys/class/scsi_host/*/link_power_management_policy.

Intel lists a total of 4 SATA controller IDs in [1] for those mobile PCHs. This commit just adds the "AHCI" variant since I only tested those.

[1]: https://cdrdv2.intel.com/v1/dl/getContent/631119

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As noted above this doesn't include the other PCI IDs listed by Intel for those PCHs (RAID modes). Also the same is probably needed for newer generations. But for both I don't have hardware to test handy right now, so only included what I have actually tested.

Added stable to CC, since on systems using S0ix this prevents S0ix residency and therefore leads to such high power consumption that suspend is effectively broken.

 drivers/ata/ahci.c | 1 +
 1 file changed, 1 insertion(+)

index 14a1c0d14916..3bb9bb483fe3 100644
@@ -421,6 +421,7 @@ static const struct pci_device_id ahci_pci_tbl[] = {
 	{ PCI_VDEVICE(INTEL, 0x34d3), board_ahci_low_power }, /* Ice Lake LP AHCI */
 	{ PCI_VDEVICE(INTEL, 0x02d3), board_ahci_low_power }, /* Comet Lake PCH-U AHCI */
 	{ PCI_VDEVICE(INTEL, 0x02d7), board_ahci_low_power }, /* Comet Lake PCH RAID */
+	{ PCI_VDEVICE(INTEL, 0xa0d3), board_ahci_low_power }, /* Tiger Lake UP{3,4} AHCI */
 
 	/* JMicron 360/1/3/5/6, match class to avoid IDE function */
 	{ PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,

2.39.1

Applied to for-6.2-fixes. Thanks !

Damien Le Moal
Western Digital Research