On Wed, Jun 11, 2014 at 10:20 PM, Mike Turquette <mturquette@xxxxxxxxxx> wrote: > Quoting Tushar Behera (2014-06-10 22:32:17) >> When the output clock of AUDSS mux is disabled, we are getting kernel >> oops while doing a clk_get() on other clocks provided by AUDSS. Though >> user manual doesn't specify this dependency, we came across this issue >> while disabling the parent of AUDSS mux clocks. > > Hi Tushar, > > Can you help me understand better what the actual problem is? What is > the root cause of the kernel oops? Currently AUDSS mux has two parents, XXTI crystal and MAU_EPLL clock. As per observation, when the output of AUDSS mux is gated, we are not able to do any operation on the clocks provided by MAU block (mostly the clocks used by ADMA and audio blocks). > > You mention calling clk_get on child clocks of the AUDSS mux fails, but > I cannot imagine why. How can the enable/disable state of a clock affect > the ability to clk_get other clocks? > I might have a little vogue while updating the commit message (mentioning about clk_get which surely is only a s/w operation), but there is definitely some issue with handling those clocks under given scenario. I am on leave till end of this week, so I will update you more with the logs on Monday. Thanks, -- Tushar -- 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
