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 <[email protected]> --- 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
