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| author | Huisong Li <lihuisong@huawei.com> | 2024-08-28 12:49:56 +0200 |
|---|---|---|
| committer | Wei Xu <xuwei5@hisilicon.com> | 2024-10-14 10:54:51 +0200 |
| commit | e3c289c0916e2a3d7859a0cf851ea242fa23ec1e (patch) | |
| tree | b7df8e6bb53b333bbe36844aa5e8489688ae8223 /Documentation/ABI | |
| parent | soc: hisilicon: kunpeng_hccs: Add used HCCS types sysfs (diff) | |
| download | linux-e3c289c0916e2a3d7859a0cf851ea242fa23ec1e.tar.xz linux-e3c289c0916e2a3d7859a0cf851ea242fa23ec1e.zip | |
soc: hisilicon: kunpeng_hccs: Support low power feature for the specified HCCS type
Add the low power feature for the specified HCCS type by increasing
and decreasing the used lane number of these HCCS ports on platform.
Signed-off-by: Huisong Li <lihuisong@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-devices-platform-kunpeng_hccs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-platform-kunpeng_hccs b/Documentation/ABI/testing/sysfs-devices-platform-kunpeng_hccs index d4c355e0e0bb..d1b3a95a5518 100644 --- a/Documentation/ABI/testing/sysfs-devices-platform-kunpeng_hccs +++ b/Documentation/ABI/testing/sysfs-devices-platform-kunpeng_hccs @@ -87,3 +87,40 @@ Contact: Huisong Li <lihuisong@huawei.com> Description: This interface is used to show all HCCS types used on the platform, like, HCCS-v1, HCCS-v2 and so on. + +What: /sys/devices/platform/HISI04Bx:00/available_inc_dec_lane_types +What: /sys/devices/platform/HISI04Bx:00/dec_lane_of_type +What: /sys/devices/platform/HISI04Bx:00/inc_lane_of_type +Date: August 2024 +KernelVersion: 6.12 +Contact: Huisong Li <lihuisong@huawei.com> +Description: + These interfaces under /sys/devices/platform/HISI04Bx/ are + used to support the low power consumption feature of some + HCCS types by changing the number of lanes used. The interfaces + changing the number of lanes used are 'dec_lane_of_type' and + 'inc_lane_of_type' which require root privileges. These + interfaces aren't exposed if no HCCS type on platform support + this feature. Please note that decreasing lane number is only + allowed if all the specified HCCS ports are not busy. + + The low power consumption interfaces are as follows: + + ============================= ==== ================================ + available_inc_dec_lane_types: (RO) available HCCS types (string) to + increase and decrease the number + of lane used, e.g. HCCS-v2. + dec_lane_of_type: (WO) input HCCS type supported + decreasing lane to decrease the + used lane number of all specified + HCCS type ports on platform to + the minimum. + You can query the 'cur_lane_num' + to get the minimum lane number + after executing successfully. + inc_lane_of_type: (WO) input HCCS type supported + increasing lane to increase the + used lane number of all specified + HCCS type ports on platform to + the full lane state. + ============================= ==== ================================ |