Here is the next version of the sloppy GPIO logic analyzer. Changes since last version: * white space fix found by Andy, thanks! * rebased to v5.17 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-v8 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 | 91 +++++ 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 | 230 ++++++++++++ 6 files changed, 680 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 -- 2.30.2
