Here is the next version of the sloppy GPIO logic analyzer. Changes since v8 are mentioned in the patch itself. For those new to this sloppy GPIO logic analyzer, here is a small excerpt from a previous cover-letter with the links updated: === Here is the next update of the in-kernel logic analyzer based on GPIO polling with local irqs disabled. It has been tested locally and remotely. It provided satisfactory results. Besides the driver, there is also a script which isolates a CPU to achieve the best possible result. I am aware of the latency limitations. However, the intention is for debugging only, not mass production. Especially for remote debugging and to get a first impression, this has already been useful. Documentation is within the patch, to get a better idea what this is all about. A branch is here: git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git renesas/gpio-logic-analyzer-v9 And an eLinux-wiki page with a picture of a result is here: https://elinux.org/Kernel_GPIO_Logic_analyzer I've used the analyzer in a few more scenarios and on multiple SoCs (Renesas R-Car H3 and M3-W) and was happy with the outcome. Looking forward to other tests and comments. From my side this is good to go. === Thanks and happy hacking, Wolfram Wolfram Sang (1): gpio: add sloppy logic analyzer using polling .../dev-tools/gpio-sloppy-logic-analyzer.rst | 93 +++++ Documentation/dev-tools/index.rst | 1 + drivers/gpio/Kconfig | 17 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-sloppy-logic-analyzer.c | 340 ++++++++++++++++++ tools/gpio/gpio-sloppy-logic-analyzer.sh | 246 +++++++++++++ 6 files changed, 698 insertions(+) create mode 100644 Documentation/dev-tools/gpio-sloppy-logic-analyzer.rst create mode 100644 drivers/gpio/gpio-sloppy-logic-analyzer.c create mode 100755 tools/gpio/gpio-sloppy-logic-analyzer.sh -- 2.43.0
