Messages in this thread | | | Subject | [PATCH v6 0/3] PCI: Precision Time Measurement support | From | Bjorn Helgaas <> | Date | Mon, 13 Jun 2016 14:05:26 -0500 |
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This is a slightly different proposal for the PTM support Jonathan proposed here:
http://lkml.kernel.org/r/1462956446-27361-2-git-send-email-jonathan.yong@intel.com
I split this into three pieces mostly for ease in reviewing. They could all be squashed:
- Enable PTM in root ports and switches automatically at boot - Enable PTM in endpoints when requested by driver - Add clock granularity information
I have some open questions about how PTM works on Root Complex Integrated Endpoints and whether we should enable it automatically even without a driver request. And I probably left out some details of the clock granularity computation, so treat this as more of an RFC than anything.
Bjorn
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Bjorn Helgaas (2): PCI: Add pci_enable_ptm() for drivers to enable PTM on endpoints PCI: Add PTM clock granularity information
Jonathan Yong (1): PCI: Add Precision Time Measurement (PTM) support
drivers/pci/pci.h | 6 ++ drivers/pci/pcie/Kconfig | 12 ++++ drivers/pci/pcie/Makefile | 1 drivers/pci/pcie/ptm.c | 140 +++++++++++++++++++++++++++++++++++++++++ drivers/pci/probe.c | 3 + include/linux/pci.h | 13 ++++ include/uapi/linux/pci_regs.h | 12 +++- 7 files changed, 186 insertions(+), 1 deletion(-) create mode 100644 drivers/pci/pcie/ptm.c
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