units: add the HZ macros

The macros for the unit conversion for frequency are duplicated in
different places.

Provide these macros in the 'units' header, so they can be reused.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Daniel Lezcano <[email protected]>
Reviewed-by: Christian Eggers <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Cc: Chanwoo Choi <[email protected]>
Cc: Guenter Roeck <[email protected]>
Cc: Jonathan Cameron <[email protected]>
Cc: Jonathan Cameron <[email protected]>
Cc: Kyungmin Park <[email protected]>
Cc: Lars-Peter Clausen <[email protected]>
Cc: Lukasz Luba <[email protected]>
Cc: Maxime Coquelin <[email protected]>
Cc: Miquel Raynal <[email protected]>
Cc: MyungJoo Ham <[email protected]>
Cc: Peter Meerwald <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Zhang Rui <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/include/linux/units.h b/include/linux/units.h
index ff51d3cfc6a0efb8861e7ec0ee4c5e67a1510725..8b8dc8a84d93c35a9d284f86605a54e13d5c5084 100644 (file)
--- a/include/linux/units.h
+++ b/include/linux/units.h
@@ -4,6 +4,10 @@
 
 #include <linux/math.h>
 
+#define HZ_PER_KHZ             1000UL
+#define KHZ_PER_MHZ            1000UL
+#define HZ_PER_MHZ             1000000UL
+
 #define MILLIWATT_PER_WATT     1000UL
 #define MICROWATT_PER_MILLIWATT        1000UL
 #define MICROWATT_PER_WATT     1000000UL