Messages in this thread | | | Date | Tue, 17 May 2022 03:05:04 -0700 | Subject | [RFC Patch v5 0/1] i2c: core: Adapter and client stats as sysfs attributes | From | Sui Chen <> |
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This change adds statistics to the i2c_adapter structure as Wolfram previously suggested (https://lore.kernel.org/linux-i2c/YgEYEk355t8C4J1x@shikoro/). It also adds relevant statistics to the per-address i2c_clients where applicable.
The list of statistics are:
- bus_errors - nacks - recovery_successes / recovery_failures (only applicable to i2c_adapter) - timeouts - messages (only applicable to i2c_client) - transfers (only applicable to i2c_adapter)
The statistics are located in /sys/class/i2c-adapter/i2c-x/stats and /sys/class/i2c-adapter/i2c-x/x-xxxx/stats respectively.
Since the counting is done in __i2c_transfer, where the number of messages transferred is not known upon error, the error counters are attributed to all unique addresses that appear in the message list passed into __i2c_transfer.
Currently an rbtree is used to find the i2c_client located at a certain address. Would be happy to know if there is a better way of doing this.
Thanks!
Sui Chen (1): i2c debug counters as sysfs attributes
drivers/i2c/i2c-core-base.c | 240 +++++++++++++++++++++++++++++++++++- drivers/i2c/i2c-dev.c | 94 ++++++++++++++ include/linux/i2c.h | 41 ++++++ 3 files changed, 374 insertions(+), 1 deletion(-)
-- 2.36.0.550.gb090851708-goog
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