Hello, this is the v4 patch for CTU CAN FD hardware timestamps reporting. Excuse my mistake, I'm sorry for the double post, but minutes after posting patch v3 I've realized I forgot to update the pm_runtime method in error counter routine. Even though pm_runtime_resume_and_get and pm_runtime_get_sync should be equivalent, I want to have the code consistent. Changes since v3: https://lore.kernel.org/all/20220914231249.593643-1-matej.vasilevski@xxxxxxxxx/t/#u - use pm_runtime_resume_and_get in error counter routine ctucan_get_berr_counter Changes since v2: https://lore.kernel.org/all/20220801184656.702930-1-matej.vasilevski@xxxxxxxxx/t/#u - proper timestamping clock handling - clocks manually enabled using clk_prepare_enable, then managed by runtime PM (if runtime PM is enabled) - driver should work even without CONFIG_PM - access to the timecounter is now protected by a spinlock - harmonized with Vincent's patch - TX timestamping capability is now correctly reported - work_delay_jiffies stored as unsigned long instead of u32 - max work delay limited to 3600 seconds (instead of 86k seconds) - adressed the rest of the comments from the patch V2 review Changes since v1: https://lore.kernel.org/all/20220512232706.24575-1-matej.vasilevski@xxxxxxxxx/ - Removed kconfig option to enable/disable timestamps. - Removed dt parameters ts-frequency and ts-used-bits. Now the user only needs to add the timestamping clock phandle to clocks, and even that is optional. - Added SIOCSHWTSTAMP ioctl to enable/disable timestamps. - Adressed comments from the RFC review. Matej Vasilevski (3): dt-bindings: can: ctucanfd: add another clock for HW timestamping can: ctucanfd: add HW timestamps to RX and error CAN frames doc: ctucanfd: RX frames timestamping for platform devices .../bindings/net/can/ctu,ctucanfd.yaml | 19 +- .../can/ctu/ctucanfd-driver.rst | 13 +- drivers/net/can/ctucanfd/Makefile | 2 +- drivers/net/can/ctucanfd/ctucanfd.h | 20 ++ drivers/net/can/ctucanfd/ctucanfd_base.c | 239 ++++++++++++++++-- drivers/net/can/ctucanfd/ctucanfd_pci.c | 5 +- drivers/net/can/ctucanfd/ctucanfd_platform.c | 5 +- drivers/net/can/ctucanfd/ctucanfd_timestamp.c | 70 +++++ 8 files changed, 344 insertions(+), 29 deletions(-) create mode 100644 drivers/net/can/ctucanfd/ctucanfd_timestamp.c base-commit: c9ae520ac3faf2f272b5705b085b3778c7997ec8 -- 2.25.1
