License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 22:07:57 +08:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2016-06-30 09:48:49 +08:00
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#include <linux/bitops.h>
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#include <linux/device.h>
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#include <linux/regmap.h>
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/* BMP280 specific registers */
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#define BMP280_REG_HUMIDITY_LSB 0xFE
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#define BMP280_REG_HUMIDITY_MSB 0xFD
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#define BMP280_REG_TEMP_XLSB 0xFC
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#define BMP280_REG_TEMP_LSB 0xFB
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#define BMP280_REG_TEMP_MSB 0xFA
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#define BMP280_REG_PRESS_XLSB 0xF9
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#define BMP280_REG_PRESS_LSB 0xF8
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#define BMP280_REG_PRESS_MSB 0xF7
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#define BMP280_REG_CONFIG 0xF5
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#define BMP280_REG_CTRL_MEAS 0xF4
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#define BMP280_REG_STATUS 0xF3
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#define BMP280_REG_CTRL_HUMIDITY 0xF2
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/* Due to non linear mapping, and data sizes we can't do a bulk read */
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#define BMP280_REG_COMP_H1 0xA1
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#define BMP280_REG_COMP_H2 0xE1
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#define BMP280_REG_COMP_H3 0xE3
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#define BMP280_REG_COMP_H4 0xE4
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#define BMP280_REG_COMP_H5 0xE5
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#define BMP280_REG_COMP_H6 0xE7
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#define BMP280_REG_COMP_TEMP_START 0x88
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#define BMP280_COMP_TEMP_REG_COUNT 6
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#define BMP280_REG_COMP_PRESS_START 0x8E
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#define BMP280_COMP_PRESS_REG_COUNT 18
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#define BMP280_FILTER_MASK (BIT(4) | BIT(3) | BIT(2))
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#define BMP280_FILTER_OFF 0
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#define BMP280_FILTER_2X BIT(2)
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#define BMP280_FILTER_4X BIT(3)
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#define BMP280_FILTER_8X (BIT(3) | BIT(2))
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#define BMP280_FILTER_16X BIT(4)
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#define BMP280_OSRS_HUMIDITY_MASK (BIT(2) | BIT(1) | BIT(0))
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#define BMP280_OSRS_HUMIDITIY_X(osrs_h) ((osrs_h) << 0)
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#define BMP280_OSRS_HUMIDITY_SKIP 0
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#define BMP280_OSRS_HUMIDITY_1X BMP280_OSRS_HUMIDITIY_X(1)
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#define BMP280_OSRS_HUMIDITY_2X BMP280_OSRS_HUMIDITIY_X(2)
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#define BMP280_OSRS_HUMIDITY_4X BMP280_OSRS_HUMIDITIY_X(3)
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#define BMP280_OSRS_HUMIDITY_8X BMP280_OSRS_HUMIDITIY_X(4)
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#define BMP280_OSRS_HUMIDITY_16X BMP280_OSRS_HUMIDITIY_X(5)
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#define BMP280_OSRS_TEMP_MASK (BIT(7) | BIT(6) | BIT(5))
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#define BMP280_OSRS_TEMP_SKIP 0
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#define BMP280_OSRS_TEMP_X(osrs_t) ((osrs_t) << 5)
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#define BMP280_OSRS_TEMP_1X BMP280_OSRS_TEMP_X(1)
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#define BMP280_OSRS_TEMP_2X BMP280_OSRS_TEMP_X(2)
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#define BMP280_OSRS_TEMP_4X BMP280_OSRS_TEMP_X(3)
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#define BMP280_OSRS_TEMP_8X BMP280_OSRS_TEMP_X(4)
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#define BMP280_OSRS_TEMP_16X BMP280_OSRS_TEMP_X(5)
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#define BMP280_OSRS_PRESS_MASK (BIT(4) | BIT(3) | BIT(2))
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#define BMP280_OSRS_PRESS_SKIP 0
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#define BMP280_OSRS_PRESS_X(osrs_p) ((osrs_p) << 2)
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#define BMP280_OSRS_PRESS_1X BMP280_OSRS_PRESS_X(1)
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#define BMP280_OSRS_PRESS_2X BMP280_OSRS_PRESS_X(2)
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#define BMP280_OSRS_PRESS_4X BMP280_OSRS_PRESS_X(3)
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#define BMP280_OSRS_PRESS_8X BMP280_OSRS_PRESS_X(4)
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#define BMP280_OSRS_PRESS_16X BMP280_OSRS_PRESS_X(5)
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#define BMP280_MODE_MASK (BIT(1) | BIT(0))
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#define BMP280_MODE_SLEEP 0
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#define BMP280_MODE_FORCED BIT(0)
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#define BMP280_MODE_NORMAL (BIT(1) | BIT(0))
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/* BMP180 specific registers */
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#define BMP180_REG_OUT_XLSB 0xF8
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#define BMP180_REG_OUT_LSB 0xF7
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#define BMP180_REG_OUT_MSB 0xF6
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#define BMP180_REG_CALIB_START 0xAA
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#define BMP180_REG_CALIB_COUNT 22
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#define BMP180_MEAS_SCO BIT(5)
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#define BMP180_MEAS_TEMP (0x0E | BMP180_MEAS_SCO)
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#define BMP180_MEAS_PRESS_X(oss) ((oss) << 6 | 0x14 | BMP180_MEAS_SCO)
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#define BMP180_MEAS_PRESS_1X BMP180_MEAS_PRESS_X(0)
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#define BMP180_MEAS_PRESS_2X BMP180_MEAS_PRESS_X(1)
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#define BMP180_MEAS_PRESS_4X BMP180_MEAS_PRESS_X(2)
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#define BMP180_MEAS_PRESS_8X BMP180_MEAS_PRESS_X(3)
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/* BMP180 and BMP280 common registers */
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#define BMP280_REG_CTRL_MEAS 0xF4
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#define BMP280_REG_RESET 0xE0
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#define BMP280_REG_ID 0xD0
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#define BMP180_CHIP_ID 0x55
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#define BMP280_CHIP_ID 0x58
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#define BME280_CHIP_ID 0x60
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#define BMP280_SOFT_RESET_VAL 0xB6
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2017-07-25 17:11:14 +08:00
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/* BMP280 register skipped special values */
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#define BMP280_TEMP_SKIPPED 0x80000
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#define BMP280_PRESS_SKIPPED 0x80000
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#define BMP280_HUMIDITY_SKIPPED 0x8000
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2016-06-30 09:48:49 +08:00
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/* Regmap configurations */
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extern const struct regmap_config bmp180_regmap_config;
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extern const struct regmap_config bmp280_regmap_config;
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/* Probe called from different transports */
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int bmp280_common_probe(struct device *dev,
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struct regmap *regmap,
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unsigned int chip,
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2016-06-30 09:48:52 +08:00
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const char *name,
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int irq);
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2016-06-30 09:48:49 +08:00
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int bmp280_common_remove(struct device *dev);
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2016-06-30 09:48:53 +08:00
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/* PM ops */
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extern const struct dev_pm_ops bmp280_dev_pm_ops;
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