forked from Minki/linux
71348bcaac
After a hardware module's clocks are enabled, Linux must wait for it to indicate readiness via its IDLEST bit before attempting to access the device, otherwise register accesses to the device may trigger an abort. This has traditionally been implemented in the clock framework, but this is the wrong place for it: the clock framework doesn't know which module clocks must be enabled for a module to leave idle; and if a module is not in smart-idle mode, it may never leave idle at all. This type of information is best stored in a per-hardware module data structure (coming in a following patch), rather than a per-clock data structure. The new code will use these new functions to handle waiting for modules to enable. Once hardware module data is filled in for all of the on-chip devices, the clock framework code to handle IDLEST waiting can be removed. Signed-off-by: Paul Walmsley <paul@pwsan.com> |
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