From: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx> This series adds a new GPIO testing module based on configfs committable items and sysfs. The goal is to provide a testing driver that will be configurable at runtime (won't need module reload) and easily extensible. The control over the attributes is also much more fine-grained than in gpio-mockup. This series also contains a respin of the patches I sent separately to the configfs maintainers - these patches implement the concept of committable items that was well defined for a long time but never actually completed. Apart from the new driver itself, its selftests and the configfs patches, this series contains some changes to the bitmap API - most importantly: it adds devres managed variants of bitmap_alloc() and bitmap_zalloc(). v1 -> v2: - add selftests for gpio-sim - add helper programs for selftests - update the configfs rename callback to work with the new API introduced in v5.11 - fix a missing quote in the documentation - use !! whenever using bits operation that are required to return 0 or 1 - use provided bitmap API instead of reimplementing copy or fill operations - fix a deadlock in gpio_sim_direction_output() - add new read-only configfs attributes for mapping of configfs items to GPIO device names - and address other minor issues pointed out in reviews of v1 Bartosz Golaszewski (12): configfs: increase the item name length configfs: use (1UL << bit) for internal flags configfs: implement committable items samples: configfs: add a committable group lib: bitmap: remove the 'extern' keyword from function declarations lib: bitmap: order includes alphabetically lib: bitmap: provide devm_bitmap_alloc() and devm_bitmap_zalloc() drivers: export device_is_bound() gpio: sim: new testing module selftests: gpio: provide a helper for reading chip info selftests: gpio: add a helper for reading GPIO line names selftests: gpio: add test cases for gpio-sim Documentation/admin-guide/gpio/gpio-sim.rst | 72 ++ Documentation/filesystems/configfs.rst | 6 +- drivers/base/dd.c | 1 + drivers/gpio/Kconfig | 8 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-sim.c | 878 ++++++++++++++++++ fs/configfs/configfs_internal.h | 22 +- fs/configfs/dir.c | 245 ++++- include/linux/bitmap.h | 129 +-- include/linux/configfs.h | 3 +- lib/bitmap.c | 42 +- samples/configfs/configfs_sample.c | 153 +++ tools/testing/selftests/gpio/.gitignore | 2 + tools/testing/selftests/gpio/Makefile | 4 +- tools/testing/selftests/gpio/config | 1 + tools/testing/selftests/gpio/gpio-chip-info.c | 57 ++ tools/testing/selftests/gpio/gpio-line-name.c | 55 ++ tools/testing/selftests/gpio/gpio-sim.sh | 229 +++++ 18 files changed, 1822 insertions(+), 86 deletions(-) create mode 100644 Documentation/admin-guide/gpio/gpio-sim.rst create mode 100644 drivers/gpio/gpio-sim.c create mode 100644 tools/testing/selftests/gpio/gpio-chip-info.c create mode 100644 tools/testing/selftests/gpio/gpio-line-name.c create mode 100755 tools/testing/selftests/gpio/gpio-sim.sh -- 2.29.1
