On 24 July 2014 07:54, Rob Herring <rob.herring@xxxxxxxxxx> wrote: >> A previous approach tried to compare struct clk pointers, which is a bad >> idea since those are just cookies and should not be deref'd by drivers. >> However a similar approach would be to compare the phandle, right? Yeah. So what's the right way then? > I think there needs to be a way to query whether a rate change for a > clock affects other children. As pointed out previously, the clock to > a core may not be shared, but it's parent that can change rates could > be shared. This could be done with functions > clk_get_parent_rate_change to return the clock in heirarchy which can > change rates, and clk_is_parent_clk which tells if one clock is a > child of another clock. It's been a while since I've looked at the > clock api. It could also be done by experiment. Change the rate for > core 0 and see if core 1's rate is changed and still equal. There's > probably some ordering issue with doing that though. But Mike sort of Nak'd that as well earlier :) -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
