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authorJean Pihet <j-pihet@ti.com>2012-04-24 09:26:40 +0400
committerKevin Hilman <khilman@ti.com>2012-06-01 03:03:44 +0400
commit50e4a7d0b26c86628300edf4625cc5ff16a7a227 (patch)
tree80e493531abd6e27886a2a53fb0192c769168761 /include/linux/power
parent1fcd3069d4944ad0532f41fbc4957ba24552a92f (diff)
downloadlinux-50e4a7d0b26c86628300edf4625cc5ff16a7a227.tar.xz
ARM: OMAP2+: SmartReflex: introduce a busy loop condition test macro
Now that omap_test_timeout is only accessible from mach-omap2/, introduce a similar function for SR. This change makes the SmartReflex implementation ready for the move to drivers/. Signed-off-by: Jean Pihet <j-pihet@ti.com> Signed-off-by: J Keerthy <j-keerthy@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'include/linux/power')
-rw-r--r--include/linux/power/smartreflex.h23
1 files changed, 22 insertions, 1 deletions
diff --git a/include/linux/power/smartreflex.h b/include/linux/power/smartreflex.h
index 884eaeea96be..78b795ea2709 100644
--- a/include/linux/power/smartreflex.h
+++ b/include/linux/power/smartreflex.h
@@ -22,7 +22,7 @@
#include <linux/types.h>
#include <linux/platform_device.h>
-
+#include <linux/delay.h>
#include <plat/voltage.h>
/*
@@ -168,6 +168,27 @@ struct omap_sr {
};
/**
+ * test_cond_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.
+ *
+ * Copied from omap_test_timeout */
+#define sr_test_cond_timeout(cond, timeout, index) \
+({ \
+ for (index = 0; index < timeout; index++) { \
+ if (cond) \
+ break; \
+ udelay(1); \
+ } \
+})
+
+/**
* struct omap_sr_pmic_data - Strucutre to be populated by pmic code to pass
* pmic specific info to smartreflex driver
*