From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
linux-iio@vger.kernel.org, chrome-platform@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-media@vger.kernel.org
Cc: "Jonathan Cameron" <jic23@kernel.org>,
"David Lechner" <dlechner@baylibre.com>,
"Nuno Sá" <nuno.sa@analog.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Benson Leung" <bleung@chromium.org>,
"Guenter Roeck" <groeck@chromium.org>,
"Lars-Peter Clausen" <lars@metafoo.de>,
"Michael Hennerich" <Michael.Hennerich@analog.com>,
"Mauro Carvalho Chehab" <mchehab@kernel.org>,
"Daniel W. S. Almeida" <dwlsalmeida@gmail.com>
Subject: [PATCH v1 2/6] units: Add value of π * 10⁹
Date: Mon, 27 Oct 2025 15:34:51 +0100 [thread overview]
Message-ID: <20251027143850.2070427-3-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20251027143850.2070427-1-andriy.shevchenko@linux.intel.com>
There are a few drivers that want to have this value, and at least one
known to come soon. Let's define a value for them.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
include/linux/units.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/include/linux/units.h b/include/linux/units.h
index f626e212d4ca..82bdc2041328 100644
--- a/include/linux/units.h
+++ b/include/linux/units.h
@@ -21,6 +21,9 @@
#define PICO 1000000000000ULL
#define FEMTO 1000000000000000ULL
+/* Value of π * 10⁹ */
+#define PI 3141592653LL
+
/* Hz based multipliers */
#define NANOHZ_PER_HZ 1000000000UL
#define MICROHZ_PER_HZ 1000000UL
--
2.50.1
next prev parent reply other threads:[~2025-10-27 14:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-27 14:34 [PATCH v1 0/6] iio: Introduce and use value of π Andy Shevchenko
2025-10-27 14:34 ` [PATCH v1 1/6] media: vidtv: Rename PI definition to PI_SAMPLES Andy Shevchenko
2025-10-30 7:24 ` Hans Verkuil
2025-10-27 14:34 ` Andy Shevchenko [this message]
2025-10-27 14:52 ` [PATCH v1 2/6] units: Add value of π * 10⁹ Jonathan Cameron
2025-10-27 14:59 ` David Lechner
2025-10-28 8:09 ` Andy Shevchenko
2025-10-27 19:30 ` David Laight
2025-10-28 8:08 ` Andy Shevchenko
2025-10-28 9:27 ` David Laight
2025-10-27 14:34 ` [PATCH v1 3/6] media: dvb-frontends: atbm8830: Convert to use PI definition Andy Shevchenko
2025-10-30 7:26 ` Hans Verkuil
2025-10-27 14:34 ` [PATCH v1 4/6] iio: cros_ec_sensors: " Andy Shevchenko
2025-10-27 14:34 ` [PATCH v1 5/6] iio: frequency: ad9523: " Andy Shevchenko
2025-10-27 14:34 ` [PATCH v1 6/6] iio: position: iqs624-pos: " Andy Shevchenko
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