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| author | Jonathan Lemon <jonathan.lemon@gmail.com> | 2021-08-04 06:33:27 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-08-04 14:52:50 +0300 |
| commit | 773bda96492153e11d21eb63ac814669b51fc701 (patch) | |
| tree | 766989a52f7ec1d60613925eadcc315b4d60ef0b /drivers/iommu/msm_iommu.c | |
| parent | 04190bf8944deb7e3ac165a1a494db23aa0160a9 (diff) | |
| download | linux-773bda96492153e11d21eb63ac814669b51fc701.tar.xz | |
ptp: ocp: Expose various resources on the timecard.
The OpenCompute timecard driver has additional functionality besides
a clock. Make the following resources available:
- The external timestamp channels (ts0/ts1)
- devlink support for flashing and health reporting
- GPS and MAC serial ports
- board serial number (obtained from i2c device)
Also add watchdog functionality for when GNSS goes into holdover.
The resources are collected under a timecard class directory:
[jlemon@timecard ~]$ ls -g /sys/class/timecard/ocp1/
total 0
-r--r--r--. 1 root 4096 Aug 3 19:49 available_clock_sources
-rw-r--r--. 1 root 4096 Aug 3 19:49 clock_source
lrwxrwxrwx. 1 root 0 Aug 3 19:49 device -> ../../../0000:04:00.0/
-r--r--r--. 1 root 4096 Aug 3 19:49 gps_sync
lrwxrwxrwx. 1 root 0 Aug 3 19:49 i2c -> ../../xiic-i2c.1024/i2c-2/
drwxr-xr-x. 2 root 0 Aug 3 19:49 power/
lrwxrwxrwx. 1 root 0 Aug 3 19:49 pps ->
../../../../../virtual/pps/pps1/
lrwxrwxrwx. 1 root 0 Aug 3 19:49 ptp -> ../../ptp/ptp2/
-r--r--r--. 1 root 4096 Aug 3 19:49 serialnum
lrwxrwxrwx. 1 root 0 Aug 3 19:49 subsystem ->
../../../../../../class/timecard/
lrwxrwxrwx. 1 root 0 Aug 3 19:49 ttyGPS -> ../../tty/ttyS7/
lrwxrwxrwx. 1 root 0 Aug 3 19:49 ttyMAC -> ../../tty/ttyS8/
-rw-r--r--. 1 root 4096 Aug 3 19:39 uevent
The labeling is needed at the minimum, in order to tell the serial
devices apart.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/iommu/msm_iommu.c')
0 files changed, 0 insertions, 0 deletions