Provide a simple macro that can return the value of 10 raised to a
positive integer. We are going to use this in order to scale units from
firmware to HWMON.
Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
---
include/linux/kernel.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2d14e21c16c0..62fc8bd84bc9 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -294,6 +294,17 @@ static inline u32 reciprocal_scale(u32 val, u32 ep_ro)
return (u32)(((u64) val * ep_ro) >> 32);
}
+/* Return in f the value of 10 raise to the power x */
+#define __pow10(x, f)( \
+{ \
+ typeof(x) __x = abs(x); \
+ f = 1; \
+ while (__x--) \
+ f *= 10; \
+ f; \
+} \
+)
+
#if defined(CONFIG_MMU) && \
(defined(CONFIG_PROVE_LOCKING) || defined(CONFIG_DEBUG_ATOMIC_SLEEP))
#define might_fault() __might_fault(__FILE__, __LINE__)
--
2.17.1
