10. Directory structure 2 3For ease of source browsing this directory may contain soft links to variant 4directories located elsewhere; 5build scripts fully support such layout, however this is not necessary in order 6to build such variants. 7 81. HW Customization 9 101.1 General description 11- wakeup-gpio has direction from Application Processor (AP) to ContextHub 12- irq1 has direction from ContextHub to AP (wakeup interrupt) 13- irq2 has direction from ContextHub to AP (non-wakeup interrupt) (optional) 14 151.2 Kernel side 16- wakeup-gpio = SH_INT_WAKEUP 17- irq1-gpio = AP_INT_WAKEUP 18- irq2-gpio = AP_INT_NONWAKEUP 19 201.3 ContextHub side 21- #define SH_INT_WAKEUP PX(N0) 22- #define AP_INT_WAKEUP PY(N1) 23- #define AP_INT_NONWAKEUP PZ(N2) 24