units: complement the set of Hz units

Currently, Hz units do not have milli, micro and nano Hz coefficients.
Some drivers (IIO especially) use their analogues to calculate
appropriate Hz values. This patch includes them to units.h definitions,
so they can be used from different kernel places.

Signed-off-by: Dmitry Rokosov <ddrokosov@sberdevices.ru>
Link: https://lore.kernel.org/r/20220812165243.22177-3-ddrokosov@sberdevices.ru
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/include/linux/units.h b/include/linux/units.h
index 681fc65..2793a41 100644 (file)
--- a/include/linux/units.h
+++ b/include/linux/units.h
@@ -20,6 +20,9 @@
 #define PICO   1000000000000ULL
 #define FEMTO  1000000000000000ULL
 
+#define NANOHZ_PER_HZ          1000000000UL
+#define MICROHZ_PER_HZ         1000000UL
+#define MILLIHZ_PER_HZ         1000UL
 #define HZ_PER_KHZ             1000UL
 #define KHZ_PER_MHZ            1000UL
 #define HZ_PER_MHZ             1000000UL