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| author | Qi Liu <liuqi115@huawei.com> | 2023-01-14 13:13:02 +0300 |
|---|---|---|
| committer | Suzuki K Poulose <suzuki.poulose@arm.com> | 2023-01-16 13:16:15 +0300 |
| commit | 2d4103ae31aa6d5570fd1178ddc68867ab4ab5bd (patch) | |
| tree | dc0164a8f150635a551ed712ddcb71d1d7bc3282 /Documentation/ABI/testing/sysfs-bus-coresight-devices-ultra_smb | |
| parent | 06f5c2926aaa0fba7f99678da6ef77cbbbda1441 (diff) | |
| download | linux-2d4103ae31aa6d5570fd1178ddc68867ab4ab5bd.tar.xz | |
Documentation: Add document for UltraSoc SMB driver
Bring in documentation for UltraSoc SMB driver.
It simply describes the device, sysfs interface and the
firmware bindings.
Signed-off-by: Qi Liu <liuqi115@huawei.com>
Signed-off-by: Junhao He <hejunhao3@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230114101302.62320-3-hejunhao3@huawei.com
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-coresight-devices-ultra_smb')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-coresight-devices-ultra_smb | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-ultra_smb b/Documentation/ABI/testing/sysfs-bus-coresight-devices-ultra_smb new file mode 100644 index 000000000000..f560918ae738 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-ultra_smb @@ -0,0 +1,31 @@ +What: /sys/bus/coresight/devices/ultra_smb<N>/enable_sink +Date: January 2023 +KernelVersion: 6.3 +Contact: Junhao He <hejunhao3@huawei.com> +Description: (RW) Add/remove a SMB device from a trace path. There can be + multiple sources for a single SMB device. + +What: /sys/bus/coresight/devices/ultra_smb<N>/mgmt/buf_size +Date: January 2023 +KernelVersion: 6.3 +Contact: Junhao He <hejunhao3@huawei.com> +Description: (RO) Shows the buffer size of each UltraSoc SMB device. + +What: /sys/bus/coresight/devices/ultra_smb<N>/mgmt/buf_status +Date: January 2023 +KernelVersion: 6.3 +Contact: Junhao He <hejunhao3@huawei.com> +Description: (RO) Shows the value of UltraSoc SMB status register. + BIT(0) is zero means buffer is empty. + +What: /sys/bus/coresight/devices/ultra_smb<N>/mgmt/read_pos +Date: January 2023 +KernelVersion: 6.3 +Contact: Junhao He <hejunhao3@huawei.com> +Description: (RO) Shows the value of UltraSoc SMB Read Pointer register. + +What: /sys/bus/coresight/devices/ultra_smb<N>/mgmt/write_pos +Date: January 2023 +KernelVersion: 6.3 +Contact: Junhao He <hejunhao3@huawei.com> +Description: (RO) Shows the value of UltraSoc SMB Write Pointer register. |