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Message-ID: <20251107201005.3156118-3-andriy.shevchenko@linux.intel.com> Date: Fri, 7 Nov 2025 21:03:00 +0100 From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Hans Verkuil <hverkuil+cisco@...nel.org>, linux-iio@...r.kernel.org, chrome-platform@...ts.linux.dev, linux-kernel@...r.kernel.org, linux-media@...r.kernel.org Cc: Jonathan Cameron <jic23@...nel.org>, David Lechner <dlechner@...libre.com>, Nuno Sá <nuno.sa@...log.com>, Andy Shevchenko <andy@...nel.org>, Benson Leung <bleung@...omium.org>, Guenter Roeck <groeck@...omium.org>, Lars-Peter Clausen <lars@...afoo.de>, Michael Hennerich <Michael.Hennerich@...log.com>, Mauro Carvalho Chehab <mchehab@...nel.org>, "Daniel W. S. Almeida" <dwlsalmeida@...il.com> Subject: [PATCH v2 2/6] units: Add 32- and 64-bit signed values of π There are a few drivers that want to have these values, and one more known to come soon. Let's define the values for them. Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> --- include/linux/units.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/units.h b/include/linux/units.h index f626e212d4ca..5b3293bce04c 100644 --- a/include/linux/units.h +++ b/include/linux/units.h @@ -21,6 +21,12 @@ #define PICO 1000000000000ULL #define FEMTO 1000000000000000ULL +/* Value of π * 10⁸ (fits s32 or signed int) */ +#define PI 314159265 + +/* Value of π * 10¹⁸ (fits s64 or signed long long) */ +#define PI_LL 3141592653589793238LL + /* Hz based multipliers */ #define NANOHZ_PER_HZ 1000000000UL #define MICROHZ_PER_HZ 1000000UL -- 2.50.1
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