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| author | Serge Semin <Sergey.Semin@baikalelectronics.ru> | 2022-09-09 21:36:09 +0200 |
|---|---|---|
| committer | Damien Le Moal <damien.lemoal@opensource.wdc.com> | 2022-09-16 18:39:38 +0200 |
| commit | 03f1076fbe9fd0edd92011f1c97bf6daad83d01b (patch) | |
| tree | 374f2b8782276ec22e6cc166add0bbcb4d5a20f1 /drivers/ata/ahci.c | |
| parent | ata: libahci_platform: Introduce reset assertion/deassertion methods (diff) | |
| download | linux-03f1076fbe9fd0edd92011f1c97bf6daad83d01b.tar.xz linux-03f1076fbe9fd0edd92011f1c97bf6daad83d01b.zip | |
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/ahci.c')
0 files changed, 0 insertions, 0 deletions