On 10/30/2012 04:03 PM, Antti P Miettinen wrote: > Joseph Lo <[email protected]> writes: >>>>>> + writel(tegra_in_lp2.bits[0], tegra_cpu_lp2_mask); > > BTW, writel_relaxed() would probably be more than enough? IRAM is mapped > stronly ordered, isn't it? And there's an explicit dsb(). And the mask > is observed and written only by CPUs. If there are coherence issues, > they would be in the fabric? And then neither CPU barriers nor L2 sync > would help, you'd need a readback, right?
I expect there are many places where we simply default to using readl/writel (e.g. due to cut/paste, their prevalence, etc.) rather than explicitly using the _relaxed variants if we can. Perhaps we should do a pass through all the Tegra code and clean that up sometime. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
