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20:48.31 | aandrew | hello |
20:48.48 | aandrew | is it possible to use the ftrace framework to debug the low level I2C device driver? |
20:49.17 | aandrew | I've got it enabled and get very pretty results but the actual calls to my driver (in i2c-cadence.c) don't show up |
20:50.01 | aandrew | e.g. i2cdev_write -> i2c_master_send -> i2c_transfer -> i2c_lock_adapter -> i2c_mux_master_xfer -> i2c_mux_gpio_select -> i2c_mux_gpio_set is shown |
20:50.36 | aandrew | but I never see cdns_i2c_master_xfer show up |
20:50.49 | aandrew | it's clearly being called as I'm seeing i2c traffic |
20:51.02 | aandrew | and yes *cdns* is enabled in the filter :-) |
20:52.30 | aandrew | in fact the cadence drivers for spi and uart and everythign are enabled in the filter since *cdns* pulls in a lot, and yet none of it is showing up in the trace |
20:56.05 | aandrew | hm, rebooted and tried again and now it's showing up... nevermind. |
22:49.54 | wmat | aandrew: heehee |