I was debugging a SDHC hardware bug and got tired of having to translate the register values by hand. This patch set makes it so all SDHC register read and write operations can be traced and easily read by a human. An example trace can be seen here: https://pastebin.com/x73d5cvL I ended up defining a new tracing function `trace_print_register`. This method takes a register definition and pretty prints it. It's a hybrid of `trace_print_flags_seq` and `trace_print_symbols_seq`. It supports printing bit fields, enum fields, and numeric fields. See the documentation for usage. I hope this makes someone else's life easier when debugging SDHC hardware problems. Raul E Rangel (4): trace_events: Add trace_print_register to print register fields mmc/sdhci: Rename sdhci.c to sdhci-core.c mmc/host/sdhci: Add register read and write trace events mmc/host/sdhci: Make sdhci_read/sdhci_write call trace functions drivers/mmc/host/Makefile | 4 + drivers/mmc/host/{sdhci.c => sdhci-core.c} | 136 +++++++++ drivers/mmc/host/sdhci-trace.c | 319 +++++++++++++++++++++ drivers/mmc/host/sdhci-trace.h | 93 ++++++ drivers/mmc/host/sdhci.h | 89 +----- include/linux/trace_events.h | 4 + include/linux/tracepoint-defs.h | 6 + include/trace/trace_events.h | 9 + kernel/trace/trace_output.c | 121 ++++++++ 9 files changed, 698 insertions(+), 83 deletions(-) rename drivers/mmc/host/{sdhci.c => sdhci-core.c} (97%) create mode 100644 drivers/mmc/host/sdhci-trace.c create mode 100644 drivers/mmc/host/sdhci-trace.h -- 2.21.0.392.gf8f6787159e-goog
