arm/mach-lpc32xx/pm.c

2  * arch/arm/mach-lpc32xx/pm.c
17  * direct-run, and halt modes. When switching between halt and run modes,
18  * the CPU transistions through direct-run mode. For Linux, direct-run
27  * Direct-run mode:
38  * wake the system up back into direct-run mode.
40  * DRAM refresh
41  * DRAM clocking and refresh are slightly different for systems with DDR
43  * SDRAM will still be accessible in direct-run mode. In DDR based systems,
44  * a transition to direct-run mode will stop all DDR accesses (no clocks).
46  * and exit DRAM self-refresh modes must not be executed in DRAM. A small
53  *  Places DRAMs in self-refresh mode
54  *  Enter direct-run mode
57  *  Enter halt mode - CPU and buses will stop
58  *  System enters direct-run mode when an enabled event occurs
91 		return -ENOMEM;  in lpc32xx_pm_enter()
128 	 * Setup SDRAM self-refresh clock to automatically disable o  in lpc32xx_pm_init()
129 	 * start of self-refresh. This only needs to be done once.  in lpc32xx_pm_init()