| What: /sys/kernel/debug/pcie_ptm_*/local_clock |
| Date: May 2025 |
| Contact: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
| Description: |
| (RO) PTM local clock in nanoseconds. Applicable for both Root |
| Complex and Endpoint controllers. |
| |
| What: /sys/kernel/debug/pcie_ptm_*/master_clock |
| Date: May 2025 |
| Contact: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
| Description: |
| (RO) PTM master clock in nanoseconds. Applicable only for |
| Endpoint controllers. |
| |
| What: /sys/kernel/debug/pcie_ptm_*/t1 |
| Date: May 2025 |
| Contact: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
| Description: |
| (RO) PTM T1 timestamp in nanoseconds. Applicable only for |
| Endpoint controllers. |
| |
| What: /sys/kernel/debug/pcie_ptm_*/t2 |
| Date: May 2025 |
| Contact: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
| Description: |
| (RO) PTM T2 timestamp in nanoseconds. Applicable only for |
| Root Complex controllers. |
| |
| What: /sys/kernel/debug/pcie_ptm_*/t3 |
| Date: May 2025 |
| Contact: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
| Description: |
| (RO) PTM T3 timestamp in nanoseconds. Applicable only for |
| Root Complex controllers. |
| |
| What: /sys/kernel/debug/pcie_ptm_*/t4 |
| Date: May 2025 |
| Contact: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
| Description: |
| (RO) PTM T4 timestamp in nanoseconds. Applicable only for |
| Endpoint controllers. |
| |
| What: /sys/kernel/debug/pcie_ptm_*/context_update |
| Date: May 2025 |
| Contact: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
| Description: |
| (RW) Control the PTM context update mode. Applicable only for |
| Endpoint controllers. |
| |
| Following values are supported: |
| |
| * auto = PTM context auto update trigger for every 10ms |
| |
| * manual = PTM context manual update. Writing 'manual' to this |
| file triggers PTM context update (default) |
| |
| What: /sys/kernel/debug/pcie_ptm_*/context_valid |
| Date: May 2025 |
| Contact: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
| Description: |
| (RW) Control the PTM context validity (local clock timing). |
| Applicable only for Root Complex controllers. PTM context is |
| invalidated by hardware if the Root Complex enters low power |
| mode or changes link frequency. |
| |
| Following values are supported: |
| |
| * 0 = PTM context invalid (default) |
| |
| * 1 = PTM context valid |
