From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Jarkko Nikula <jarkko.nikula@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
wsa@kernel.org
Subject: [PATCH v3 1/3] units: Add SI metric prefix definitions
Date: Mon, 12 Jul 2021 17:20:25 +0300 [thread overview]
Message-ID: <20210712142027.22900-1-andriy.shevchenko@linux.intel.com> (raw)
Sometimes it's useful to have well-defined SI metric prefix to be used
to self-describe the formulas or equations.
List most popular ones in the units.h.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
v3: converted to be unsigned values (Joe)
include/linux/units.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/include/linux/units.h b/include/linux/units.h
index dcc30a53fa93..4a25e0cc8fb3 100644
--- a/include/linux/units.h
+++ b/include/linux/units.h
@@ -4,6 +4,22 @@
#include <linux/math.h>
+/* Metric prefixes in accordance with Système international (d'unités) */
+#define PETA 1000000000000000ULL
+#define TERA 1000000000000ULL
+#define GIGA 1000000000UL
+#define MEGA 1000000UL
+#define KILO 1000UL
+#define HECTO 100UL
+#define DECA 10UL
+#define DECI 10UL
+#define CENTI 100UL
+#define MILLI 1000UL
+#define MICRO 1000000UL
+#define NANO 1000000000UL
+#define PICO 1000000000000ULL
+#define FEMTO 1000000000000000ULL
+
#define MILLIWATT_PER_WATT 1000L
#define MICROWATT_PER_MILLIWATT 1000L
#define MICROWATT_PER_WATT 1000000L
--
2.30.2
next reply other threads:[~2021-07-12 14:20 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-12 14:20 Andy Shevchenko [this message]
2021-07-12 14:20 ` [PATCH v3 2/3] i2c: designware: Use DIV_ROUND_CLOSEST() macro Andy Shevchenko
2021-08-11 14:44 ` Wolfram Sang
2021-07-12 14:20 ` [PATCH v3 3/3] i2c: designware: Fix indentation in the header Andy Shevchenko
2021-08-11 14:44 ` Wolfram Sang
2021-08-11 12:22 ` [PATCH v3 1/3] units: Add SI metric prefix definitions Andy Shevchenko
2021-08-11 14:42 ` Wolfram Sang
2021-08-11 14:44 ` Wolfram Sang
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