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commit e73dd2a9a912677ebb49bcfdd92d7429ae495ccd Author: Alan Carvalho de Assis <[email protected]> AuthorDate: Thu Sep 24 09:43:51 2026 -0300 boards/sim: register /dev/mouse0 when CONFIG_SIM_MOUSE is enabled The X11 mouse emulation driver (arch/sim/src/sim/sim_mouse.c) is built and fed by the X11 event loop whenever CONFIG_SIM_MOUSE=y, but nothing ever called sim_mouse_initialize(), so /dev/mouse0 was never registered and applications could not read any mouse reports. Since nothing referenced sim_mouse.o, the linker did not even pull it in and the build failed with "undefined reference to `sim_mouseevent'". Call sim_mouse_initialize(0) from sim_bringup(), next to the existing touchscreen and keyboard initialization. Tested with sim:nsh + CONFIG_SIM_X11FB, CONFIG_SIM_MOUSE and CONFIG_SIM_KEYBOARD: /dev/mouse0 is now listed and reports left, middle and right button state plus pointer motion. Signed-off-by: Alan C. Assis <[email protected]> Assisted-by: Claude Opus 5.5 (1M context) --- boards/sim/sim/sim/src/sim_bringup.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/boards/sim/sim/sim/src/sim_bringup.c b/boards/sim/sim/sim/src/sim_bringup.c index 3064b1e1a39..278ab4c698c 100644 --- a/boards/sim/sim/sim/src/sim_bringup.c +++ b/boards/sim/sim/sim/src/sim_bringup.c @@ -369,6 +369,16 @@ int sim_bringup(void) } #endif +#ifdef CONFIG_SIM_MOUSE + /* Initialize the mouse */ + + ret = sim_mouse_initialize(0); + if (ret < 0) + { + syslog(LOG_ERR, "ERROR: sim_mouse_initialize failed: %d\n", ret); + } +#endif + #ifdef CONFIG_SIM_KEYBOARD /* Initialize the keyboard */
