diff options
Diffstat (limited to 'arch/arm/plat-omap/include/plat/common.h')
| -rw-r--r-- | arch/arm/plat-omap/include/plat/common.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/common.h b/arch/arm/plat-omap/include/plat/common.h index 064f1730f43b..e9779676448b 100644 --- a/arch/arm/plat-omap/include/plat/common.h +++ b/arch/arm/plat-omap/include/plat/common.h @@ -71,4 +71,24 @@ void omap2_set_globals_sdrc(struct omap_globals *); void omap2_set_globals_control(struct omap_globals *); void omap2_set_globals_prcm(struct omap_globals *); +/** + * omap_test_timeout - busy-loop, testing a condition + * @cond: condition to test until it evaluates to true + * @timeout: maximum number of microseconds in the timeout + * @index: loop index (integer) + * + * Loop waiting for @cond to become true or until at least @timeout + * microseconds have passed. To use, define some integer @index in the + * calling code. After running, if @index == @timeout, then the loop has + * timed out. + */ +#define omap_test_timeout(cond, timeout, index) \ +({ \ + for (index = 0; index < timeout; index++) { \ + if (cond) \ + break; \ + udelay(1); \ + } \ +}) + #endif /* __ARCH_ARM_MACH_OMAP_COMMON_H */ |