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@xxxxxxxxx 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 --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
