From: Jarkko Nikula <jarkko.nikula@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>, wsa@kernel.org
Subject: Re: [PATCH resend v1 1/3] units: Add SI metric prefix definitions
Date: Mon, 7 Jun 2021 15:33:31 +0300 [thread overview]
Message-ID: <0466dab7-f2d2-3b7c-52a6-a12a6b09a67f@linux.intel.com> (raw)
In-Reply-To: <20210603160433.35816-1-andriy.shevchenko@linux.intel.com>
On 6/3/21 7:04 PM, Andy Shevchenko wrote:
> 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>
> ---
> include/linux/units.h | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/include/linux/units.h b/include/linux/units.h
> index dcc30a53fa93..7366fcd45ec2 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 1000000000000000LL
> +#define TERA 1000000000000LL
> +#define GIGA 1000000000L
> +#define MEGA 1000000L
> +#define KILO 1000L
> +#define HECTO 100L
> +#define DECA 10L
> +#define DECI 10L
> +#define CENTI 100L
> +#define MILLI 1000L
> +#define MICRO 1000000L
> +#define NANO 1000000000L
> +#define PICO 1000000000000LL
> +#define FEMTO 1000000000000000LL
> +
For me milli is always 1/1000. Might lead to confusion with these
defines if idea is to multiply with KILO but divide with MILLI?
Jarkko
next prev parent reply other threads:[~2021-06-07 12:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-03 16:04 [PATCH resend v1 1/3] units: Add SI metric prefix definitions Andy Shevchenko
2021-06-03 16:04 ` [PATCH resend v1 2/3] i2c: designware: Use DIV_ROUND_CLOSEST() macro Andy Shevchenko
2021-06-03 16:04 ` [PATCH resend v1 3/3] i2c: designware: Fix indentation in the header Andy Shevchenko
2021-06-07 12:33 ` Jarkko Nikula [this message]
2021-06-07 14:24 ` [PATCH resend v1 1/3] units: Add SI metric prefix definitions Andy Shevchenko
2021-06-07 14:35 ` Andy Shevchenko
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