Hi Pali, On Sat, Sep 3, 2022 at 6:08 PM Pali Rohár <p...@kernel.org> wrote: > > On Saturday 03 September 2022 17:38:01 Tony Dinh wrote: > > Hi Pali, > > > > Is there a way to get the CPU frequency from the board upon start up? > > > > Thanks, > > Tony > > Hello! Each SoC has either fixed CPU frequency or has some bits in SAR > register which say on which frequency is CPU running. SAR bits are SoC > specific and are documented either in Functional Specifications or in > Hardware Specifications (both documents are available for free all > 32-bit Marvell SoCs except 375 and 39x).
Thanks for the recap. I do remember you posted a patch for that detection. https://lists.denx.de/pipermail/u-boot/2022-August/492034.html Just want to make sure that the SAR register is the only way we can detect it in u-boot. The Kirkwood 6192 SoC on this Pogo V4 board can run at 200 Mhz and 800 Mhz with frequency scaling in Linux. Thanks, Tony