On 26 June 2014 00:32, Stephen Boyd [off-list ref] wrote:

quoted

+     cpu_reg = regulator_get_optional(cpu_dev, "cpu0");

I don't think this driver should be using regulator_get_optional() (Mark
B. please correct me if I'm wrong). I doubt a supply is actually
optional for CPUs, just some DTs aren't specifying them. In those cases,
the regulator core will insert a dummy supply and the code will work
without having to check for probe defer and error pointers.

This is what Mark did earlier, don't know if he would like to revert it:
7d74897 (cpufreq: cpufreq-cpu0: Use devm_regulator_get_optional()).