Hi Mimi, Hi Nayna, > The patch replaces the call to builtin_platform_driver(), with a call > to core_initcall(). > https://github.com/raspberrypi/linux/blob/rpi-4.8.y/drivers/clk/bcm/cl > k-bcm2835.c > static int __init __bcm2835_clk_driver_init(void) > { > return platform_driver_register(&bcm2835_clk_driver); > } > core_initcall(__bcm2835_clk_driver_init); Ah it is already in the rpi sources - however I *am* using these, but it does not work? Any ideas or pointers highly appreciated. Peter