From patchwork Thu Nov 28 14:54:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akinobu Mita X-Patchwork-Id: 11266129 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 47AC413B6 for ; Thu, 28 Nov 2019 14:55:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2722E21775 for ; Thu, 28 Nov 2019 14:55:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="uiVu1qxs" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726653AbfK1OzC (ORCPT ); Thu, 28 Nov 2019 09:55:02 -0500 Received: from mail-pj1-f65.google.com ([209.85.216.65]:42303 "EHLO mail-pj1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726401AbfK1OzB (ORCPT ); Thu, 28 Nov 2019 09:55:01 -0500 Received: by mail-pj1-f65.google.com with SMTP id y21so11998139pjn.9; Thu, 28 Nov 2019 06:55:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=g0HiFEqIr34ap3Bh6iBqZPv3kmztxiAkeFZgF3cKXMU=; b=uiVu1qxsLxyPYPoq+O64OM6AHYD3Bo6KqoMZ3JLMT5lLAJOhBs5sZYiog6g3UcNpht 4TR1HNXXKqSgpj+SWe7c7HEulw0LAiORFfq0cChrdGDGczV+SsU2JZ7HQ+ziNQT9wJ4Y MB7NcLDAssHLAZzKKyWDhP1JsLR1j4AN2Z7uedi3TVVqn0N6kDtsGenJktAVbo9yd0Ld WfHv7NZjr2/nBCN4P6UZVcHEHfRC/JE18aY7IkPJTJBFHWQcbHN6RXbLLujov3a+Sda0 PZpGMBGIANYl3N1CGMyOPYLww9mOgZtSxc+1CSWJ9aAa3WfuFENMCy2tpfPz6GWN1MQI y+Bw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=g0HiFEqIr34ap3Bh6iBqZPv3kmztxiAkeFZgF3cKXMU=; b=gK/iEPe7fqXa5fGKQB+IisAaIL224COts3oCmnasqahfgAt+PsuyE7gMjEh8xWI88b boctQfI9pNV1TIY3PP6gyKfz4zEx+4gQQl+7mmj8BxP9cXbXr9TnZ3X0NmUY2dqLO8z1 BiW13UDoC3jjnKlIrzjPgGAIddDiARs6ZQ82UC8fWIfLp0Q5dmK/KkqVa9R3c6ZQVogD Ue78WqQ+lgYo7LrHoeeI0+5tgrfHzRbLsEDNwguJg7xh9R3l/FAARPgJXodtwp0WA7Nj AuN7aY4KJXsqEo3s4QzOuv34LPsTXTm9uViXZ9+sUjgYD3I9ezGkHKNW+vQ7st7XRIB5 cImA== X-Gm-Message-State: APjAAAVnZbWJyGyl1MqngiLs9R9v394H3sw5goJneQBMGEGodZm5kgNA EmtCNtrMZ0vwEGkmNFoS8WOvuqwIWvs= X-Google-Smtp-Source: APXvYqxwvjfJwJ9RVZBGU55qS1UZ7w101xpLRriZKYh/OSQlyuip6R8NkJJ+WBD7ODgUVFOLfSnyGg== X-Received: by 2002:a17:90a:330c:: with SMTP id m12mr13090381pjb.18.1574952900858; Thu, 28 Nov 2019 06:55:00 -0800 (PST) Received: from localhost.localdomain ([240f:34:212d:1:8015:e854:5ef0:f52e]) by smtp.gmail.com with ESMTPSA id z11sm22282563pfg.117.2019.11.28.06.54.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 28 Nov 2019 06:55:00 -0800 (PST) From: Akinobu Mita To: linux-nvme@lists.infradead.org, linux-hwmon@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Akinobu Mita , Sujith Thomas , Darren Hart , Andy Shevchenko , Zhang Rui , Daniel Lezcano , Amit Kucheria , Jean Delvare , Guenter Roeck , Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg Subject: [PATCH v2 1/8] add header file for kelvin to/from Celsius conversion helpers Date: Thu, 28 Nov 2019 23:54:32 +0900 Message-Id: <1574952879-7200-2-git-send-email-akinobu.mita@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1574952879-7200-1-git-send-email-akinobu.mita@gmail.com> References: <1574952879-7200-1-git-send-email-akinobu.mita@gmail.com> Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org There are several helper macros to convert kelvin to/from Celsius in for thermal drivers. These are useful for any other drivers or subsystems, but it's odd to include just for the helpers. This adds a new that provides the equivalent inline functions for any drivers or subsystems. It is intended to replace the helpers in . Cc: Sujith Thomas Cc: Darren Hart Cc: Andy Shevchenko Cc: Zhang Rui Cc: Daniel Lezcano Cc: Amit Kucheria Cc: Jean Delvare Cc: Guenter Roeck Cc: Keith Busch Cc: Jens Axboe Cc: Christoph Hellwig Cc: Sagi Grimberg Signed-off-by: Akinobu Mita --- * v2 - add deci_kelvin_to_millicelsius_with_offset() in linux/temperature.h - stop including linux/temperature.h from linux/thermal.h include/linux/temperature.h | 51 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 include/linux/temperature.h diff --git a/include/linux/temperature.h b/include/linux/temperature.h new file mode 100644 index 0000000..679e70a --- /dev/null +++ b/include/linux/temperature.h @@ -0,0 +1,51 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_TEMPERATURE_H +#define _LINUX_TEMPERATURE_H + +#include + +#define ABSOLUTE_ZERO_MILLICELSIUS -273150 + +static inline long kelvin_to_millicelsius(long t) +{ + return t * 1000 + ABSOLUTE_ZERO_MILLICELSIUS; +} + +static inline long millicelsius_to_kelvin(long t) +{ + return DIV_ROUND_CLOSEST(t - ABSOLUTE_ZERO_MILLICELSIUS, 1000); +} + +static inline long deci_kelvin_to_celsius(long t) +{ + return DIV_ROUND_CLOSEST(t * 100 + ABSOLUTE_ZERO_MILLICELSIUS, 1000); +} + +static inline long celsius_to_deci_kelvin(long t) +{ + return t * 10 - DIV_ROUND_CLOSEST(ABSOLUTE_ZERO_MILLICELSIUS, 100); +} + +/** + * deci_kelvin_to_millicelsius_with_offset - convert Kelvin to Celsius + * @t: temperature value in decidegrees Kelvin + * @offset: difference between Kelvin and Celsius in millidegrees + * + * Return: temperature value in millidegrees Celsius + */ +static inline long deci_kelvin_to_millicelsius_with_offset(long t, long offset) +{ + return t * 100 - offset; +} + +static inline long deci_kelvin_to_millicelsius(long t) +{ + return t * 100 + ABSOLUTE_ZERO_MILLICELSIUS; +} + +static inline long millicelsius_to_deci_kelvin(long t) +{ + return DIV_ROUND_CLOSEST(t - ABSOLUTE_ZERO_MILLICELSIUS, 100); +} + +#endif /* _LINUX_TEMPERATURE_H */