> > > > "tegra114.dtsi" has the folloiwng "tsc" entry. So can we consider that > > if dts has this entry, CNTFRQ is not set, which implies it's in secure > > mode. kernel should set it up by itself? Otherwise, skip this setup > > and use it. For example: > > > > tsc { > > compatible = "nvidia,tegra114-tsc"; > > reg = <0x700f0000 0x20000>; > > + setup-cntfrq; > > }; > > > > Is this what you explained in the above? > > At least, kernel can survive without bootloader/firmware support, ATM. > > No. The DT should only describe the hardware, and not something that is > Linux specific. > > Just use the "clock-frequency" attribute in the timer arch-timer node, > and get rid of this CNTFRQ setting. The driver already knows how to deal > with this situation if this attribute is set. The frequency is probed at boottime by the kernel though. It will not necessarily be the same for every board. Cheers, Peter. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html