On Wed, 22 Mar 2023, Tianfei Zhang wrote: > Adding a DFL (Device Feature List) device driver of ToD device for > Intel FPGA cards. > > The Intel FPGA Time of Day(ToD) IP within the FPGA DFL bus is exposed > as PTP Hardware clock(PHC) device to the Linux PTP stack to synchronize > the system clock to its ToD information using phc2sys utility of the > Linux PTP stack. The DFL is a hardware List within FPGA, which defines > a linked list of feature headers within the device MMIO space to provide > an extensible way of adding subdevice features. > > Signed-off-by: Raghavendra Khadatare <raghavendrax.anand.khadatare@xxxxxxxxx> > Signed-off-by: Tianfei Zhang <tianfei.zhang@xxxxxxxxx> > > --- > v2: > - handle NULL for ptp_clock_register(). > - use readl_poll_timeout_atomic() instead of readl_poll_timeout(), and > change the interval timeout to 10us. > - fix the uninitialized variable. > --- > MAINTAINERS | 7 + > drivers/ptp/Kconfig | 13 ++ > drivers/ptp/Makefile | 1 + > drivers/ptp/ptp_dfl_tod.c | 333 ++++++++++++++++++++++++++++++++++++++ > 4 files changed, 354 insertions(+) > create mode 100644 drivers/ptp/ptp_dfl_tod.c > > diff --git a/MAINTAINERS b/MAINTAINERS > index d8ebab595b2a..3fd603369464 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -15623,6 +15623,13 @@ L: netdev@xxxxxxxxxxxxxxx > S: Maintained > F: drivers/ptp/ptp_ocp.c > > +INTEL PTP DFL ToD DRIVER > +M: Tianfei Zhang <tianfei.zhang@xxxxxxxxx> > +L: linux-fpga@xxxxxxxxxxxxxxx > +L: netdev@xxxxxxxxxxxxxxx > +S: Maintained > +F: drivers/ptp/ptp_dfl_tod.c > + > OPENCORES I2C BUS DRIVER > M: Peter Korsgaard <peter@xxxxxxxxxxxxx> > M: Andrew Lunn <andrew@xxxxxxx> > diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig > index fe4971b65c64..e0d6f136ee46 100644 > --- a/drivers/ptp/Kconfig > +++ b/drivers/ptp/Kconfig > @@ -186,4 +186,17 @@ config PTP_1588_CLOCK_OCP > > More information is available at http://www.timingcard.com/ > > +config PTP_DFL_TOD > + tristate "FPGA DFL ToD Driver" > + depends on FPGA_DFL Should this also have depends on PTP_1588_CLOCK? -- i.
