Your ROOT_URL in app.ini is https://src.whiteboxsystems.nl/ but you are visiting http://src.whiteboxsystems.nl/Whitebox/u-boot/src/commit/b1c3bf99fb477675d464aeadb5dd69d2cbc9dc7b/drivers/gpio You should set ROOT_URL correctly, otherwise the web may not work correctly.
upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
 
 
 
 
 
 
u-boot/drivers/gpio
Peter Tyser e92739d34e Add support for PCA953x I2C gpio devices 17 years ago
..
Makefile
pca953x.c