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| author |   Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2017-02-24 16:09:40 +0200 |
|---|---|---|
| committer | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2017-08-25 18:48:00 +0300 |
| commit | a0e7df335afd2a8a8a688251ffee375b58b6517c (patch) | |
| tree | 6639e55ee5fb65286bde48fdbfa6f4ab16890077 /drivers/hwtracing/intel_th/core.c | |
| parent | intel_th: Add global activate/deactivate callbacks for the glue layers (diff) | |
| download | linux-dev-a0e7df335afd2a8a8a688251ffee375b58b6517c.tar.xz linux-dev-a0e7df335afd2a8a8a688251ffee375b58b6517c.zip | |
intel_th: Perform time resync on capture start
On some devices (TH 2.x devices at the moment), the internal time counter
is initially not synchronized to the global crystal clock, so the time
stamps it produces will not be useful. In this case, the driver needs
to force the time counter resync.
This applies the workaround to relevant devices.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Diffstat (limited to 'drivers/hwtracing/intel_th/core.c')
| -rw-r--r-- | drivers/hwtracing/intel_th/core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c index 998e3e55073a..1a023e30488c 100644 --- a/drivers/hwtracing/intel_th/core.c +++ b/drivers/hwtracing/intel_th/core.c @@ -436,8 +436,9 @@ static const struct intel_th_subdevice { .nres = 1, .res = { { + /* Handle TSCU from GTH driver */ .start = REG_GTH_OFFSET, - .end = REG_GTH_OFFSET + REG_GTH_LENGTH - 1, + .end = REG_TSCU_OFFSET + REG_TSCU_LENGTH - 1, .flags = IORESOURCE_MEM, }, }, |