Linux-NVME Archive on lore.kernel.org
 help / color / Atom feed
From: Akinobu Mita <akinobu.mita@gmail.com>
To: linux-nvme@lists.infradead.org, linux-hwmon@vger.kernel.org,
	linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Jens Axboe <axboe@fb.com>,
	Amit Kucheria <amit.kucheria@verdurent.com>,
	Jean Delvare <jdelvare@suse.com>,
	Sagi Grimberg <sagi@grimberg.me>,
	Sujith Thomas <sujith.thomas@intel.com>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Akinobu Mita <akinobu.mita@gmail.com>,
	Eduardo Valentin <edubezval@gmail.com>,
	Guenter Roeck <linux@roeck-us.net>,
	Keith Busch <kbusch@kernel.org>,
	Darren Hart <dvhart@infradead.org>,
	Zhang Rui <rui.zhang@intel.com>, Christoph Hellwig <hch@lst.de>,
	Andy Shevchenko <andy@infradead.org>
Subject: [PATCH 1/8] add header file for kelvin to/from Celsius conversion helpers
Date: Sun, 24 Nov 2019 23:08:43 +0900
Message-ID: <1574604530-9024-2-git-send-email-akinobu.mita@gmail.com> (raw)
In-Reply-To: <1574604530-9024-1-git-send-email-akinobu.mita@gmail.com>

There are several helper macros to convert kelvin to/from Celsius in
<linux/thermal.h> for thermal drivers.  These are useful for any other
drivers or subsystems, but it's odd to include <linux/thermal.h> just for
the helpers.

This adds a new <linux/temperature.h> that provides the equivalent inline
functions for any drivers or subsystems.  It is intended to replace the
helpers in <linux/thermal.h>.

Cc: Sujith Thomas <sujith.thomas@intel.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Amit Kucheria <amit.kucheria@verdurent.com>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Keith Busch <kbusch@kernel.org>
Cc: Jens Axboe <axboe@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
---
 include/linux/temperature.h | 39 +++++++++++++++++++++++++++++++++++++++
 include/linux/thermal.h     |  1 +
 2 files changed, 40 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..d7e2aed
--- /dev/null
+++ b/include/linux/temperature.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_TEMPERATURE_H
+#define _LINUX_TEMPERATURE_H
+
+#include <linux/kernel.h>
+
+#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);
+}
+
+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 */
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index e45659c..ed549e4 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -14,6 +14,7 @@
 #include <linux/idr.h>
 #include <linux/device.h>
 #include <linux/sysfs.h>
+#include <linux/temperature.h>
 #include <linux/workqueue.h>
 #include <uapi/linux/thermal.h>
 
-- 
2.7.4


_______________________________________________
Linux-nvme mailing list
Linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme

  reply index

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-24 14:08 [PATCH 0/8] " Akinobu Mita
2019-11-24 14:08 ` Akinobu Mita [this message]
2019-11-24 14:57   ` [PATCH 1/8] " Andy Shevchenko
2019-11-25 14:29     ` Akinobu Mita
2019-11-25 19:05       ` Andy Shevchenko
2019-11-24 14:08 ` [PATCH 2/8] ACPI: thermal: switch to use <linux/temperature.h> helpers Akinobu Mita
2019-11-24 15:17   ` Guenter Roeck
2019-11-25 14:31     ` Akinobu Mita
2019-11-24 14:08 ` [PATCH 3/8] platform/x86: asus-wmi: " Akinobu Mita
2019-11-24 19:54   ` Andy Shevchenko
2019-11-25 14:31     ` Akinobu Mita
2019-11-25 19:06       ` Andy Shevchenko
2019-11-24 14:08 ` [PATCH 4/8] platform/x86: intel_menlow: " Akinobu Mita
2019-11-24 19:57   ` Andy Shevchenko
2019-11-25 14:34     ` Akinobu Mita
2019-11-25 19:07       ` Andy Shevchenko
2019-11-26 14:34         ` Akinobu Mita
2019-11-24 14:08 ` [PATCH 5/8] thermal: int340x: " Akinobu Mita
2019-11-24 14:08 ` [PATCH 6/8] thermal: intel_pch: " Akinobu Mita
2019-11-24 15:15   ` Guenter Roeck
2019-11-24 14:08 ` [PATCH 7/8] nvme: hwmon: " Akinobu Mita
2019-11-25  6:59   ` Christoph Hellwig
2019-11-24 14:08 ` [PATCH 8/8] thermal: remove kelvin to/from Celsius conversion helpers from <linux/thermal.h> Akinobu Mita
2019-11-24 20:00   ` Andy Shevchenko
2019-11-25 14:39     ` Akinobu Mita
2019-11-25 19:08       ` Andy Shevchenko

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1574604530-9024-2-git-send-email-akinobu.mita@gmail.com \
    --to=akinobu.mita@gmail.com \
    --cc=amit.kucheria@verdurent.com \
    --cc=andy@infradead.org \
    --cc=axboe@fb.com \
    --cc=daniel.lezcano@linaro.org \
    --cc=dvhart@infradead.org \
    --cc=edubezval@gmail.com \
    --cc=hch@lst.de \
    --cc=jdelvare@suse.com \
    --cc=kbusch@kernel.org \
    --cc=linux-hwmon@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-nvme@lists.infradead.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=linux@roeck-us.net \
    --cc=rui.zhang@intel.com \
    --cc=sagi@grimberg.me \
    --cc=sujith.thomas@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-NVME Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-nvme/0 linux-nvme/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-nvme linux-nvme/ https://lore.kernel.org/linux-nvme \
		linux-nvme@lists.infradead.org
	public-inbox-index linux-nvme

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.infradead.lists.linux-nvme


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git