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 17:07:57 +03:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2012-08-20 06:55:11 +04:00
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#ifndef __MACH_MMP_CLK_H
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#define __MACH_MMP_CLK_H
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#include <linux/clk-provider.h>
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#include <linux/clkdev.h>
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#define APBC_NO_BUS_CTRL BIT(0)
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#define APBC_POWER_CTRL BIT(1)
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2014-10-31 05:13:44 +03:00
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/* Clock type "factor" */
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2014-10-31 05:13:41 +03:00
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struct mmp_clk_factor_masks {
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2014-10-31 05:13:44 +03:00
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unsigned int factor;
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unsigned int num_mask;
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unsigned int den_mask;
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unsigned int num_shift;
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unsigned int den_shift;
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2012-08-20 06:55:11 +04:00
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};
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2014-10-31 05:13:41 +03:00
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struct mmp_clk_factor_tbl {
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2012-08-20 06:55:11 +04:00
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unsigned int num;
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unsigned int den;
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};
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2014-10-31 05:13:44 +03:00
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struct mmp_clk_factor {
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struct clk_hw hw;
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void __iomem *base;
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struct mmp_clk_factor_masks *masks;
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struct mmp_clk_factor_tbl *ftbl;
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unsigned int ftbl_cnt;
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spinlock_t *lock;
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};
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extern struct clk *mmp_clk_register_factor(const char *name,
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const char *parent_name, unsigned long flags,
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void __iomem *base, struct mmp_clk_factor_masks *masks,
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struct mmp_clk_factor_tbl *ftbl, unsigned int ftbl_cnt,
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spinlock_t *lock);
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2014-10-31 05:13:45 +03:00
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/* Clock type "mix" */
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#define MMP_CLK_BITS_MASK(width, shift) \
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(((1 << (width)) - 1) << (shift))
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#define MMP_CLK_BITS_GET_VAL(data, width, shift) \
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((data & MMP_CLK_BITS_MASK(width, shift)) >> (shift))
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#define MMP_CLK_BITS_SET_VAL(val, width, shift) \
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(((val) << (shift)) & MMP_CLK_BITS_MASK(width, shift))
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enum {
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MMP_CLK_MIX_TYPE_V1,
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MMP_CLK_MIX_TYPE_V2,
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MMP_CLK_MIX_TYPE_V3,
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};
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/* The register layout */
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struct mmp_clk_mix_reg_info {
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void __iomem *reg_clk_ctrl;
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void __iomem *reg_clk_sel;
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u8 width_div;
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u8 shift_div;
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u8 width_mux;
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u8 shift_mux;
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u8 bit_fc;
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};
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/* The suggested clock table from user. */
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struct mmp_clk_mix_clk_table {
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unsigned long rate;
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u8 parent_index;
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unsigned int divisor;
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unsigned int valid;
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};
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struct mmp_clk_mix_config {
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struct mmp_clk_mix_reg_info reg_info;
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struct mmp_clk_mix_clk_table *table;
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unsigned int table_size;
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u32 *mux_table;
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struct clk_div_table *div_table;
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u8 div_flags;
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u8 mux_flags;
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};
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struct mmp_clk_mix {
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struct clk_hw hw;
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struct mmp_clk_mix_reg_info reg_info;
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struct mmp_clk_mix_clk_table *table;
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u32 *mux_table;
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struct clk_div_table *div_table;
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unsigned int table_size;
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u8 div_flags;
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u8 mux_flags;
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unsigned int type;
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spinlock_t *lock;
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};
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extern const struct clk_ops mmp_clk_mix_ops;
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extern struct clk *mmp_clk_register_mix(struct device *dev,
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const char *name,
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2020-03-09 22:42:39 +03:00
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const char * const *parent_names,
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2014-10-31 05:13:47 +03:00
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u8 num_parents,
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2014-10-31 05:13:45 +03:00
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unsigned long flags,
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struct mmp_clk_mix_config *config,
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spinlock_t *lock);
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2014-10-31 05:13:46 +03:00
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/* Clock type "gate". MMP private gate */
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#define MMP_CLK_GATE_NEED_DELAY BIT(0)
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struct mmp_clk_gate {
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struct clk_hw hw;
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void __iomem *reg;
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u32 mask;
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u32 val_enable;
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u32 val_disable;
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unsigned int flags;
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spinlock_t *lock;
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};
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extern const struct clk_ops mmp_clk_gate_ops;
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extern struct clk *mmp_clk_register_gate(struct device *dev, const char *name,
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const char *parent_name, unsigned long flags,
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void __iomem *reg, u32 mask, u32 val_enable,
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u32 val_disable, unsigned int gate_flags,
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spinlock_t *lock);
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2012-08-20 06:55:11 +04:00
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extern struct clk *mmp_clk_register_apbc(const char *name,
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const char *parent_name, void __iomem *base,
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unsigned int delay, unsigned int apbc_flags, spinlock_t *lock);
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extern struct clk *mmp_clk_register_apmu(const char *name,
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const char *parent_name, void __iomem *base, u32 enable_mask,
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spinlock_t *lock);
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2014-10-31 05:13:47 +03:00
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struct mmp_clk_unit {
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unsigned int nr_clks;
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struct clk **clk_table;
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struct clk_onecell_data clk_data;
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};
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struct mmp_param_fixed_rate_clk {
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unsigned int id;
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char *name;
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const char *parent_name;
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unsigned long flags;
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unsigned long fixed_rate;
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};
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void mmp_register_fixed_rate_clks(struct mmp_clk_unit *unit,
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struct mmp_param_fixed_rate_clk *clks,
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int size);
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struct mmp_param_fixed_factor_clk {
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unsigned int id;
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char *name;
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const char *parent_name;
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unsigned long mult;
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unsigned long div;
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unsigned long flags;
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};
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void mmp_register_fixed_factor_clks(struct mmp_clk_unit *unit,
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struct mmp_param_fixed_factor_clk *clks,
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int size);
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struct mmp_param_general_gate_clk {
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unsigned int id;
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const char *name;
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const char *parent_name;
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unsigned long flags;
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unsigned long offset;
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u8 bit_idx;
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u8 gate_flags;
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spinlock_t *lock;
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};
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void mmp_register_general_gate_clks(struct mmp_clk_unit *unit,
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struct mmp_param_general_gate_clk *clks,
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void __iomem *base, int size);
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struct mmp_param_gate_clk {
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unsigned int id;
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char *name;
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const char *parent_name;
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unsigned long flags;
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unsigned long offset;
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u32 mask;
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u32 val_enable;
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u32 val_disable;
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unsigned int gate_flags;
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spinlock_t *lock;
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};
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void mmp_register_gate_clks(struct mmp_clk_unit *unit,
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struct mmp_param_gate_clk *clks,
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void __iomem *base, int size);
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struct mmp_param_mux_clk {
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unsigned int id;
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char *name;
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2020-03-09 22:42:39 +03:00
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const char * const *parent_name;
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2014-10-31 05:13:47 +03:00
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u8 num_parents;
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unsigned long flags;
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unsigned long offset;
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u8 shift;
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u8 width;
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u8 mux_flags;
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spinlock_t *lock;
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};
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void mmp_register_mux_clks(struct mmp_clk_unit *unit,
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struct mmp_param_mux_clk *clks,
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void __iomem *base, int size);
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struct mmp_param_div_clk {
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unsigned int id;
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char *name;
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const char *parent_name;
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unsigned long flags;
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unsigned long offset;
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u8 shift;
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u8 width;
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u8 div_flags;
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spinlock_t *lock;
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};
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void mmp_register_div_clks(struct mmp_clk_unit *unit,
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struct mmp_param_div_clk *clks,
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void __iomem *base, int size);
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2020-03-09 22:42:41 +03:00
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struct mmp_param_pll_clk {
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unsigned int id;
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char *name;
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unsigned long default_rate;
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unsigned long enable_offset;
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u32 enable;
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unsigned long offset;
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u8 shift;
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/* MMP3 specific: */
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unsigned long input_rate;
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unsigned long postdiv_offset;
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unsigned long postdiv_shift;
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};
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void mmp_register_pll_clks(struct mmp_clk_unit *unit,
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struct mmp_param_pll_clk *clks,
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void __iomem *base, int size);
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extern struct clk *mmp_clk_register_pll(char *name,
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unsigned long default_rate,
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void __iomem *enable_reg, u32 enable,
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void __iomem *reg, u8 shift,
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unsigned long input_rate,
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void __iomem *postdiv_reg, u8 postdiv_shift);
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2014-10-31 05:13:47 +03:00
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#define DEFINE_MIX_REG_INFO(w_d, s_d, w_m, s_m, fc) \
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{ \
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.width_div = (w_d), \
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.shift_div = (s_d), \
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.width_mux = (w_m), \
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.shift_mux = (s_m), \
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.bit_fc = (fc), \
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}
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void mmp_clk_init(struct device_node *np, struct mmp_clk_unit *unit,
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int nr_clks);
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void mmp_clk_add(struct mmp_clk_unit *unit, unsigned int id,
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struct clk *clk);
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2012-08-20 06:55:11 +04:00
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#endif
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