diff options
Diffstat (limited to 'arch/arm/mach-s5pv210/pm.c')
| -rw-r--r-- | arch/arm/mach-s5pv210/pm.c | 45 |
1 files changed, 43 insertions, 2 deletions
diff --git a/arch/arm/mach-s5pv210/pm.c b/arch/arm/mach-s5pv210/pm.c index efdb5a27c060..d59c094cdea8 100644 --- a/arch/arm/mach-s5pv210/pm.c +++ b/arch/arm/mach-s5pv210/pm.c @@ -13,15 +13,56 @@ #include <linux/suspend.h> #include <linux/syscore_ops.h> #include <linux/io.h> +#include <linux/soc/samsung/s3c-pm.h> #include <asm/cacheflush.h> #include <asm/suspend.h> -#include <plat/pm-common.h> - #include "common.h" #include "regs-clock.h" +/* helper functions to save and restore register state */ +struct sleep_save { + void __iomem *reg; + unsigned long val; +}; + +#define SAVE_ITEM(x) \ + { .reg = (x) } + +/** + * s3c_pm_do_save() - save a set of registers for restoration on resume. + * @ptr: Pointer to an array of registers. + * @count: Size of the ptr array. + * + * Run through the list of registers given, saving their contents in the + * array for later restoration when we wakeup. + */ +static void s3c_pm_do_save(struct sleep_save *ptr, int count) +{ + for (; count > 0; count--, ptr++) { + ptr->val = readl_relaxed(ptr->reg); + S3C_PMDBG("saved %p value %08lx\n", ptr->reg, ptr->val); + } +} + +/** + * s3c_pm_do_restore() - restore register values from the save list. + * @ptr: Pointer to an array of registers. + * @count: Size of the ptr array. + * + * Restore the register values saved from s3c_pm_do_save(). + * + * WARNING: Do not put any debug in here that may effect memory or use + * peripherals, as things may be changing! +*/ + +static void s3c_pm_do_restore_core(const struct sleep_save *ptr, int count) +{ + for (; count > 0; count--, ptr++) + writel_relaxed(ptr->val, ptr->reg); +} + static struct sleep_save s5pv210_core_save[] = { /* Clock ETC */ SAVE_ITEM(S5P_MDNIE_SEL), |