pm24.git/drivers/ptp/ptp_clock.c, branch v3.10

ptp: dynamic allocation of PHC char devices

2013-04-12T22:22:45Z

As network adapters supporting PTP are becoming more common, machines with many NICs suddenly have many PHCs, too. The current limit of eight /dev/ptp* char devices (and thus, 8 network interfaces with PHC) is insufficient. Let the ptp driver allocate the char devices dynamically. Tested with 28 PHCs, removing and re-adding some of them. Thanks to Ben Hutchings for advice leading to simpler and cleaner patch. Signed-off-by: Jiri Benc Acked-by: Richard Cochran Signed-off-by: David S. Miller

ptp: link the phc device to its parent device

2012-09-22T19:42:38Z

PTP Hardware Clock devices appear as class devices in sysfs. This patch changes the registration API to use the parent device, clarifying the clock's relationship to the underlying device. Signed-off-by: Richard Cochran Acked-by: Ben Hutchings Acked-by: Jeff Kirsher Signed-off-by: David S. Miller

ptp: provide the clock's adjusted frequency

2012-09-22T19:42:08Z

If the timex.mode field indicates a query, then we provide the value of the current frequency adjustment. [ Get rid of extraneous empty lines -DaveM ] Signed-off-by: Richard Cochran Signed-off-by: David S. Miller

ptp: remember the adjusted frequency

2012-09-22T19:41:29Z

This patch adds a field to the representation of a PTP hardware clock in order to remember the frequency adjustment value dialed by the user. Adding this field will let us answer queries in the manner of adjtimex in a follow on patch. Signed-off-by: Richard Cochran Signed-off-by: David S. Miller

pps/ptp: Allow PHC devices to adjust PPS events for known delay

2012-09-07T20:13:28Z

Initial version by Stuart Hodgson Some PHC device drivers may deliver PPS events with a significant and variable delay, but still be able to measure precisely what that delay is. Add a pps_sub_ts() function for subtracting a delay from the timestamp(s) in a PPS event, and a PTP event type (PTP_CLOCK_PPSUSR) for which the caller provides a complete PPS event. Signed-off-by: Ben Hutchings

ptp: Add a method for obtaining the device index.

2012-04-04T09:28:45Z

This commit adds a method that MAC drivers may call in order to find out the device number of their associated PTP Hardware Clock. Signed-off-by: Richard Cochran Signed-off-by: David S. Miller

phc: Update author's email address.

2012-03-17T08:41:43Z

This commit brings the author email address macros up to date for four modules in the PTP Hardware Clock subsystem. Signed-off-by: Richard Cochran Signed-off-by: David S. Miller

ptp: Fix clock_getres() implementation

2011-12-06T10:38:32Z

The clock_getres() function must return the resolution in the timespec argument and return 0 for success. Signed-off-by: Thomas Gleixner Acked-by: John Stultz Cc: stable@kernel.org Cc: Richard Cochran

ptp: Added a brand new class driver for ptp clocks.

2011-05-23T20:01:00Z

This patch adds an infrastructure for hardware clocks that implement IEEE 1588, the Precision Time Protocol (PTP). A class driver offers a registration method to particular hardware clock drivers. Each clock is presented as a standard POSIX clock. The ancillary clock features are exposed in two different ways, via the sysfs and by a character device. Signed-off-by: Richard Cochran Acked-by: Arnd Bergmann Acked-by: David S. Miller Signed-off-by: John Stultz