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| author | Serge Semin <Sergey.Semin@baikalelectronics.ru> | 2022-09-09 22:36:09 +0300 |
|---|---|---|
| committer | Damien Le Moal <damien.lemoal@opensource.wdc.com> | 2022-09-17 01:39:38 +0900 |
| commit | 03f1076fbe9fd0edd92011f1c97bf6daad83d01b (patch) | |
| tree | 374f2b8782276ec22e6cc166add0bbcb4d5a20f1 /drivers/ata | |
| parent | f67f12ff57bcfcd7d64280f748787793217faeaf (diff) | |
| download | linux-03f1076fbe9fd0edd92011f1c97bf6daad83d01b.tar.gz | |
dt-bindings: ata: ahci: Add platform capability properties
In case if the platform doesn't have BIOS or a comprehensive firmware installed then the HBA capability flags will be left uninitialized. As a good alternative we suggest to define the DT-properties with the AHCI platform capabilities describing all the HW-init flags of the corresponding capability register. Luckily there aren't too many of them. SSS - Staggered Spin-up support and MPS - Mechanical Presence Switch support determine the corresponding feature availability for the whole HBA by means of the "hba-cap" property. Each port can have the "hba-port-cap" property initialized indicating that the port supports some of the next functionalities: HPCP - HotPlug capable port, MPSP - Mechanical Presence Switch attached to a port, CPD - Cold Plug detection, ESP - External SATA Port (eSATA), FBSCP - FIS-based switching capable port. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Diffstat (limited to 'drivers/ata')
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