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| author | Mary Ruthven <mruthven@chromium.org> | 2021-11-12 11:49:52 -0600 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-11-18 04:55:06 +0000 |
| commit | ffdb92b3c3d3373f37d69d0e91880789e093644a (patch) | |
| tree | 4cad3cbf2bce5ddcb84ba1da72ab1f3e83cfee02 /docs | |
| parent | a340a64dc9cc1ee0b8302ee4f9fa27375487bd94 (diff) | |
| download | chrome-ec-ffdb92b3c3d3373f37d69d0e91880789e093644a.tar.gz | |
Revert "common: add i2c tracing functionality"
This reverts commit f8d6179a26bf512c43638d0916fde0fc966cc3fb.
BUG=b:200823466
TEST=make buildall -j
Change-Id: I8e7a4bbd01bc99bedd2abf77b0d482ed679de865
Signed-off-by: Mary Ruthven <mruthven@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3285753
Reviewed-by: Vadim Sukhomlinov <sukhomlinov@chromium.org>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/i2c-debugging.md | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/docs/i2c-debugging.md b/docs/i2c-debugging.md deleted file mode 100644 index a1a56db285..0000000000 --- a/docs/i2c-debugging.md +++ /dev/null @@ -1,48 +0,0 @@ -I²C Debugging Tips -================== - -The EC codebase has functionality to help you debug I²C errors without -pulling out the scope. Some of the debug functionality is disabled by -default to save space, but can be enabled with the `CONFIG_I2C_DEBUG` -option. - -Tracing -------- - -You can use the `i2ctrace` command to monitor (ranges of) addresses: - - i2ctrace [list - | disable <id> - | enable <port> <address> - | enable <port> <address-low> <address-high>] - -For example: - - > i2ctrace enable 0 0x10 0x30 - > i2ctrace enable 0 0x40 0x50 - > i2ctrace list - id port address - -- ---- ------- - 0 0 0x10 to 0x30 - 1 0 0x40 to 0x50 - ... debug spam may follow ... - i2c: write 0:0x50 A8 - i2c: read 0:0x50 00 02 00 06 00 44 - ... - > i2ctrace disable 1 - > i2ctrace list - id port address - -- ---- ------- - 0 0 0x10 to 0x30 - -A maximum of 8 debug entries are supported at a single time. - -Note that `i2ctrace enable` will merge debug entries when possible: - - > i2ctrace enable 0 0x10 0x30 - > i2ctrace enable 0 0x40 0x50 - > i2ctrace enable 0 0x31 0x3f - > i2ctrace list - id port address - -- ---- ------- - 0 0 0x10 to 0x50 |