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| author | Pavan Holla <pholla@chromium.org> | 2024-04-09 01:58:57 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-09 17:38:29 +0200 |
| commit | c4ede56172dc5a9b60d7b7f11a5cf2073b14c14e (patch) | |
| tree | d5ad97724bbfcbfcc3aa33ce6797347a3f0513bb /tools/perf/scripts/python/bin/stackcollapse-record | |
| parent | usb: dwc3: pci: Don't set "linux,phy_charger_detect" property on Lenovo Yoga ... (diff) | |
| download | linux-c4ede56172dc5a9b60d7b7f11a5cf2073b14c14e.tar.gz linux-c4ede56172dc5a9b60d7b7f11a5cf2073b14c14e.zip | |
usb: typec: ucsi: Wait 20ms before reading CCI after a reset
The PPM might take time to process a reset. Allow 20ms for the reset to
be processed before reading the CCI.
This should not slow down existing implementations because they would
not set any bits in the CCI after a reset, and would take a 20ms delay
to read the CCI anyway. This change makes the delay explicit, and
reduces a CCI read. Based on the spec, the PPM has 10ms to set busy, so,
20ms seems like a reasonable delay before we read the CCI.
Signed-off-by: Pavan Holla <pholla@chromium.org>
Reviewed-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240409-ucsi-reset-delay-v3-1-8440710b012b@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-record')
0 files changed, 0 insertions, 0 deletions