On Fri, Jul 30, 2010 at 1:20 PM, Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > On Fri, Jul 30, 2010 at 12:56:33PM -0700, Colin Cross wrote: >> On Fri, Jul 30, 2010 at 6:11 AM, Dominik Brodowski > >> >> + ? ? ret = clk_set_rate_cansleep(cpu_clk, freqs.new * 1000); >> > "can sleep"? For how long? > >> Adjusting the CPU clock may require changing the voltage through the >> regulator api, which locks a mutex, and eventually through I2C, which >> sleeps on I2C completion. > > ...although in some systems the I2C cost will be replaced with updating > a GPIO which is very much cheaper. Yes, but even on a GPIO regulator, the regulator api will lock a mutex and possibly schedule. -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
