Robuta

https://en.wikipedia.org/wiki/Clock_speed Clock rate - Wikipedia clock rate wikipedia https://lwn.net/Articles/734825/ clk: implement clock rate protection mechanism [LWN.net] clock rate protection mechanism clk implement lwn https://lkml.org/lkml/2017/11/10/349 LKML: Sudeep Holla: [PATCH] clk: versatile: add min/max rate boundaries for vexpress osc clock https://lkml.org/lkml/2015/7/24/435 LKML: Lee Jones: Re: [PATCH v4 7/8] ARM: bcm2835: Tie SPI clock to the core clock rate.