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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Fix some title marks to match ReST;
- use :Author: for author name;
- foo_ is an hyperlink. Get rid of it;
- Mark literal blocks as such;
- Use tables on some places that are almost using the
table format.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- comment the internal index;
- use the proper markups for titles;
- mark literal blocks.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Mark titles;
- Mark literal blocks;
- Mark table.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Add a title for the document;
- Mark literal blocks.
While here, replace a comma by a dot at the end of a paragraph.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Add a title for the document;
- mark literals;
- use table markup for existing table.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- mark literals;
- Adjust document title;
- Use a list for references.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Use section/title markups;
- Use :Author: for authorship;
- Mark literals and literal blocks;
- Mark tables;
- Use ReST notation for footnotes.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Mark titles with ReST notation;
- comment the contents table;
- Use :Author: tag for authorship;
- mark literal blocks as such;
- use valid numbered list markups;
- Don't capitalize titles.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Adjust the title format;
- use :Author: for author's name;
- mark literals as such;
- use note and important notation.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Move author info to the beginning of file and use :Author:
- use warning/note annotation;
- mark literal blocks as such;
- Add a title for the document;
- use **emphasis** instead of _emphasis_.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Use the right notation for titles;
- Use a list for image names;
- Use literal blocks where needed;
- Whitespace fixes.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Adjust titles to match the convention;
- use a literal block for ascii artwork.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- Add a title for the document;
- Use a list for the listed URLs;
- mark literal blocks;
- adjust whitespaces;
- Don't capitalize section titles.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Pull documentation fixes from Jonathan Corbet:
"A set of fixes for various warnings, including the one caused by the
removal of kernel/rcu/srcu.c. Also correct a stray pointer in
memory-barriers.txt"
* tag '4.13-fixes' of git://git.lwn.net/linux:
kokr/memory-barriers.txt: Fix obsolete link to atomic_ops.txt
memory-barriers.txt: Fix broken link to atomic_ops.txt
docs: Turn off section numbering for the input docs
docs: Include uaccess docs from the right file
docs: Do not include from kernel/rcu/srcu.c
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Obsolete links to atomic_ops.txt exist in ko_KR/memory-barriers.txt
though the file has moved to core-api/atomic_ops.rst. This commit fixes
the obsolete links.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Few obsolete links to atomic_ops.txt exist in memory-barriers.txt though
the file has moved to core-api/atomic_ops.rst. This commit fixes the
obsolete links.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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The input docs enable section numbering at multiple levels, leading to a
lot of bright-red "nested numbered toctree" warnings in newer Sphinx
versions. Just take that directive out for now to help alleviate the
global red-pixel shortage.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Documentation/core-api/kernel-api.rst was including kerneldoc comments from
arch/x86/include/asm/uaccess_32.h, but the relevant comments moved to
.../uaccess.h some time ago. Correct the include to pick up the comments
and eliminate a warning.
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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That file went away with commit bd8cc5a062f4 (srcu: Remove Classic SRCU)
during the 4.13 merge window, leading to errors like:
Error: Cannot open file ./kernel/rcu/srcu.c
during the docs build.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull more tracing updates from Steven Rostedt:
"A few more minor updates:
- Show the tgid mappings for user space trace tools to use
- Fix and optimize the comm and tgid cache recording
- Sanitize derived kprobe names
- Ftrace selftest updates
- trace file header fix
- Update of Documentation/trace/ftrace.txt
- Compiler warning fixes
- Fix possible uninitialized variable"
* tag 'trace-v4.13-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ftrace: Fix uninitialized variable in match_records()
ftrace: Remove an unneeded NULL check
ftrace: Hide cached module code for !CONFIG_MODULES
tracing: Do note expose stack_trace_filter without DYNAMIC_FTRACE
tracing: Update Documentation/trace/ftrace.txt
tracing: Fixup trace file header alignment
selftests/ftrace: Add a testcase for kprobe event naming
selftests/ftrace: Add a test to probe module functions
selftests/ftrace: Update multiple kprobes test for powerpc
trace/kprobes: Sanitize derived event names
tracing: Attempt to record other information even if some fail
tracing: Treat recording tgid for idle task as a success
tracing: Treat recording comm for idle task as a success
tracing: Add saved_tgids file to show cached pid to tgid mappings
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The documentation of ftrace.txt has become rather outdated. Bring it closer
to reality of todays kernel.
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
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Merge yet more updates from Andrew Morton:
- various misc things
- kexec updates
- sysctl core updates
- scripts/gdb udpates
- checkpoint-restart updates
- ipc updates
- kernel/watchdog updates
- Kees's "rough equivalent to the glibc _FORTIFY_SOURCE=1 feature"
- "stackprotector: ascii armor the stack canary"
- more MM bits
- checkpatch updates
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (96 commits)
writeback: rework wb_[dec|inc]_stat family of functions
ARM: samsung: usb-ohci: move inline before return type
video: fbdev: omap: move inline before return type
video: fbdev: intelfb: move inline before return type
USB: serial: safe_serial: move __inline__ before return type
drivers: tty: serial: move inline before return type
drivers: s390: move static and inline before return type
x86/efi: move asmlinkage before return type
sh: move inline before return type
MIPS: SMP: move asmlinkage before return type
m68k: coldfire: move inline before return type
ia64: sn: pci: move inline before type
ia64: move inline before return type
FRV: tlbflush: move asmlinkage before return type
CRIS: gpio: move inline before return type
ARM: HP Jornada 7XX: move inline before return type
ARM: KVM: move asmlinkage before type
checkpatch: improve the STORAGE_CLASS test
mm, migration: do not trigger OOM killer when migrating memory
drm/i915: use __GFP_RETRY_MAYFAIL
...
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semantic
__GFP_REPEAT was designed to allow retry-but-eventually-fail semantic to
the page allocator. This has been true but only for allocations
requests larger than PAGE_ALLOC_COSTLY_ORDER. It has been always
ignored for smaller sizes. This is a bit unfortunate because there is
no way to express the same semantic for those requests and they are
considered too important to fail so they might end up looping in the
page allocator for ever, similarly to GFP_NOFAIL requests.
Now that the whole tree has been cleaned up and accidental or misled
usage of __GFP_REPEAT flag has been removed for !costly requests we can
give the original flag a better name and more importantly a more useful
semantic. Let's rename it to __GFP_RETRY_MAYFAIL which tells the user
that the allocator would try really hard but there is no promise of a
success. This will work independent of the order and overrides the
default allocator behavior. Page allocator users have several levels of
guarantee vs. cost options (take GFP_KERNEL as an example)
- GFP_KERNEL & ~__GFP_RECLAIM - optimistic allocation without _any_
attempt to free memory at all. The most light weight mode which even
doesn't kick the background reclaim. Should be used carefully because
it might deplete the memory and the next user might hit the more
aggressive reclaim
- GFP_KERNEL & ~__GFP_DIRECT_RECLAIM (or GFP_NOWAIT)- optimistic
allocation without any attempt to free memory from the current
context but can wake kswapd to reclaim memory if the zone is below
the low watermark. Can be used from either atomic contexts or when
the request is a performance optimization and there is another
fallback for a slow path.
- (GFP_KERNEL|__GFP_HIGH) & ~__GFP_DIRECT_RECLAIM (aka GFP_ATOMIC) -
non sleeping allocation with an expensive fallback so it can access
some portion of memory reserves. Usually used from interrupt/bh
context with an expensive slow path fallback.
- GFP_KERNEL - both background and direct reclaim are allowed and the
_default_ page allocator behavior is used. That means that !costly
allocation requests are basically nofail but there is no guarantee of
that behavior so failures have to be checked properly by callers
(e.g. OOM killer victim is allowed to fail currently).
- GFP_KERNEL | __GFP_NORETRY - overrides the default allocator behavior
and all allocation requests fail early rather than cause disruptive
reclaim (one round of reclaim in this implementation). The OOM killer
is not invoked.
- GFP_KERNEL | __GFP_RETRY_MAYFAIL - overrides the default allocator
behavior and all allocation requests try really hard. The request
will fail if the reclaim cannot make any progress. The OOM killer
won't be triggered.
- GFP_KERNEL | __GFP_NOFAIL - overrides the default allocator behavior
and all allocation requests will loop endlessly until they succeed.
This might be really dangerous especially for larger orders.
Existing users of __GFP_REPEAT are changed to __GFP_RETRY_MAYFAIL
because they already had their semantic. No new users are added.
__alloc_pages_slowpath is changed to bail out for __GFP_RETRY_MAYFAIL if
there is no progress and we have already passed the OOM point.
This means that all the reclaim opportunities have been exhausted except
the most disruptive one (the OOM killer) and a user defined fallback
behavior is more sensible than keep retrying in the page allocator.
[akpm@linux-foundation.org: fix arch/sparc/kernel/mdesc.c]
[mhocko@suse.com: semantic fix]
Link: http://lkml.kernel.org/r/20170626123847.GM11534@dhcp22.suse.cz
[mhocko@kernel.org: address other thing spotted by Vlastimil]
Link: http://lkml.kernel.org/r/20170626124233.GN11534@dhcp22.suse.cz
Link: http://lkml.kernel.org/r/20170623085345.11304-3-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Alex Belits <alex.belits@cavium.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: NeilBrown <neilb@suse.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Add /proc/self/task/<current-tid>/fail-nth file that allows failing
0-th, 1-st, 2-nd and so on calls systematically.
Excerpt from the added documentation:
"Write to this file of integer N makes N-th call in the current task
fail (N is 0-based). Read from this file returns a single char 'Y' or
'N' that says if the fault setup with a previous write to this file
was injected or not, and disables the fault if it wasn't yet injected.
Note that this file enables all types of faults (slab, futex, etc).
This setting takes precedence over all other generic settings like
probability, interval, times, etc. But per-capability settings (e.g.
fail_futex/ignore-private) take precedence over it. This feature is
intended for systematic testing of faults in a single system call. See
an example below"
Why add a new setting:
1. Existing settings are global rather than per-task.
So parallel testing is not possible.
2. attr->interval is close but it depends on attr->count
which is non reset to 0, so interval does not work as expected.
3. Trying to model this with existing settings requires manipulations
of all of probability, interval, times, space, task-filter and
unexposed count and per-task make-it-fail files.
4. Existing settings are per-failure-type, and the set of failure
types is potentially expanding.
5. make-it-fail can't be changed by unprivileged user and aggressive
stress testing better be done from an unprivileged user.
Similarly, this would require opening the debugfs files to the
unprivileged user, as he would need to reopen at least times file
(not possible to pre-open before dropping privs).
The proposed interface solves all of the above (see the example).
We want to integrate this into syzkaller fuzzer. A prototype has found
10 bugs in kernel in first day of usage:
https://groups.google.com/forum/#!searchin/syzkaller/%22FAULT_INJECTION%22%7Csort:relevance
I've made the current interface work with all types of our sandboxes.
For setuid the secret sauce was prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) to
make /proc entries non-root owned. So I am fine with the current
version of the code.
[akpm@linux-foundation.org: fix build]
Link: http://lkml.kernel.org/r/20170328130128.101773-1-dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Since it is possbile to have same number in tfd field (say file added,
closed, then nother file dup'ed to same number and added back) it is
imposible to distinguish such target files solely by their numbers.
Strictly speaking regular applications don't need to recognize these
targets at all but for checkpoint/restore sake we need to collect
targets to be able to push them back on restore stage in a proper order.
Thus lets add file position, inode and device number where this target
lays. This three fields can be used as a primary key for sorting, and
together with kcmp help CRIU can find out an exact file target (from the
whole set of processes being checkpointed).
Link: http://lkml.kernel.org/r/20170424154423.436491881@gmail.com
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Andrei Vagin <avagin@virtuozzo.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Minor updates in Documentation for arm64 as relocatable kernel. Also
this patch updates documentation for using uncompressed image "Image"
which is used for ARM64.
Link: http://lkml.kernel.org/r/1495104793-6563-1-git-send-email-Bharat.Bhushan@nxp.com
Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Pratyush Anand <panand@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
Pull RTC updates from Alexandre Belloni:
"Here is the pull-request for the RTC subsystem for 4.13.
Subsystem:
- expose non volatile RAM using nvmem instead of open coding in many
drivers. Unfortunately, this option has to be enabled by default to
not break existing users.
- rtctest can now test for cutoff dates, showing when an RTC will
start failing to properly save time and date.
- new RTC registration functions to remove race conditions in drivers
Newly supported RTCs:
- Broadcom STB wake-timer
- Epson RX8130CE
- Maxim IC DS1308
- STMicroelectronics STM32H7
Drivers:
- ds1307: use regmap, use nvmem, more cleanups
- ds3232: temperature reading support
- gemini: renamed to ftrtc010
- m41t80: use CCF to expose the clock
- rv8803: use nvmem
- s3c: many cleanups
- st-lpc: fix y2106 bug"
* tag 'rtc-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux: (51 commits)
rtc: Remove wrong deprecation comment
nvmem: include linux/err.h from header
rtc: st-lpc: make it robust against y2038/2106 bug
rtc: rtctest: add check for problematic dates
tools: timer: add rtctest_setdate
rtc: ds1307: remove ds1307_remove
rtc: ds1307: use generic nvmem
rtc: ds1307: switch to rtc_register_device
rtc: rv8803: remove rv8803_remove
rtc: rv8803: use generic nvmem support
rtc: rv8803: switch to rtc_register_device
rtc: add generic nvmem support
rtc: at91rm9200: remove race condition
rtc: introduce new registration method
rtc: class separate id allocation from registration
rtc: class separate device allocation from registration
rtc: stm32: add STM32H7 RTC support
dt-bindings: rtc: stm32: add support for STM32H7
rtc: ds1307: add ds1308 variant
rtc: ds3232: add temperature support
...
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Many RTCs have an on board non volatile storage. It can be battery backed
RAM or an EEPROM. Use the nvmem subsystem to export it to both userspace
and in-kernel consumers.
This stays compatible with the previous (non documented) ABI that was using
/sys/class/rtc/rtcx/device/nvram to export that memory. But will warn about
the deprecation.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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This patch documents support for STM32H7 Real Time Clock.
It introduces a new compatible and rework clock definitions.
On STM32H7 we have a 'pclk' clock for register access, in addition to
the 'rtc_ck' clock.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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The Gemini RTC is actually a standard IP block from Faraday
Technology called FTRTC010. Rename the bindings, add the
generic compatible string and add definitions for the two
available clocks.
Cc: devicetree@vger.kernel.org
Cc: Po-Yu Chuang <ratbert@faraday-tech.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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Document the binding for the Broadcom STB SoCs wake-up timer node
allowing the system to generate alarms and exit low power states.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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Each text file under Documentation follows a different
format. Some doesn't even have titles!
Change its representation to follow the adopted standard,
using ReST markups for it to be parseable by Sphinx:
- adjust identation of the titles;
- mark a table as such;
- don't capitalize chapter names.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
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Pull MTD updates from Brian Norris:
"General updates:
- Cleanups and additional flash support for "dataflash" driver
- new driver for mchp23k256 SPI SRAM device
- improve handling of MTDs without eraseblocks (i.e., MTD_NO_ERASE)
- refactor and improve "sub-partition" handling with TRX partition
parser; partitions can now be created as sub-partitions of another
partition
SPINOR updates, from Cyrille Pitchen and Marek Vasut:
- introduce support to the SPI 1-2-2 and 1-4-4 protocols.
- introduce support to the Double Data Rate (DDR) mode.
- introduce support to the Octo SPI protocols.
- add support to new memory parts for Spansion, Macronix and Winbond.
- add fixes for the Aspeed, STM32 and Cadence QSPI controler drivers.
- clean up the st_spi_fsm driver.
NAND updates, from Boris Brezillon:
- addition of on-die ECC support to Micron driver
- addition of helpers to help drivers choose most appropriate ECC
settings
- deletion of dead-code (cached programming and ->errstat() hook)
- make sure drivers that do not support the SET/GET FEATURES command
return ENOTSUPP use a dummy ->set/get_features implementation
returning -ENOTSUPP (required for Micron on-die ECC)
- change the semantic of ecc->write_page() for drivers setting the
NAND_ECC_CUSTOM_PAGE_ACCESS flag
- support exiting 'GET STATUS' command in default ->cmdfunc()
implementations
- change the prototype of ->setup_data_interface()
A bunch of driver related changes:
- various cleanup, fixes and improvements of the MTK driver
- OMAP DT bindings fixes
- support for ->setup_data_interface() in the fsmc driver
- support for imx7 in the gpmi driver
- finalization of the denali driver rework (thanks to Masahiro for
the work he's done on this driver)
- fix "bitflips in erased pages" handling in the ifc driver
- addition of PM ops and dynamic timing configuration to the atmel
driver"
* tag 'for-linus-20170713' of git://git.infradead.org/linux-mtd: (118 commits)
Documentation: ABI: mtd: describe "offset" more precisely
mtd: Fix check in mtd_unpoint()
mtd: nand: mtk: release lock on error path
mtd: st_spi_fsm: remove SPINOR_OP_RDSR2 and use SPINOR_OP_RDCR instead
mtd: spi-nor: cqspi: remove duplicate const
mtd: spi-nor: Add support for Spansion S25FL064L
mtd: spi-nor: Add support for mx66u51235f
mtd: nand: mtk: add ->setup_data_interface() hook
mtd: nand: mtk: remove unneeded mtk_ecc_hw_init from mtk_ecc_resume
mtd: nand: mtk: remove unneeded mtk_nfc_hw_init from mtk_nfc_resume
mtd: nand: mtk: disable ecc irq when writing page with hwecc
mtd: nand: mtk: fix incorrect register setting order about ecc irq
mtd: partitions: fixup some allocate_partition() whitespace
mtd: parsers: trx: fix pr_err format for printing offset
MAINTAINERS: Update SPI NOR subsystem git repositories
mtd: extract TRX parser out of bcm47xxpart into a separated module
mtd: partitions: add support for partition parsers
mtd: partitions: add support for subpartitions
mtd: partitions: rename "master" to the "parent" where appropriate
mtd: partitions: remove sysfs files when deleting all master's partitions
...
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So far Linux supported only two levels of MTD devices so we didn't need
a very precise description for this sysfs file. With commit
97519dc52b44a ("mtd: partitions: add support for subpartitions") there
is support for a tree structure so we should have more precise
description. Using "parent" and "flash device" makes it more accurate.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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From Boris:
"""
This pull request contains the following core changes:
* addition of on-ecc support to Micron driver
* addition of helpers to help drivers choose most appropriate ECC
settings
* deletion of dead-code (cached programming and ->errstat() hook)
* make sure drivers that do not support the SET/GET FEATURES command
return ENOTSUPP use a dummy ->set/get_features implementation
returning -ENOTSUPP (required for Micron on-die ECC)
* change the semantic of ecc->write_page() for drivers setting the
NAND_ECC_CUSTOM_PAGE_ACCESS flag
* support exiting 'GET STATUS' command in default ->cmdfunc()
implementations
* change the prototype of ->setup_data_interface()
A bunch of driver related changes:
* various cleanup, fixes and improvements of the MTK driver
* OMAP DT bindings fixes
* support for ->setup_data_interface() in the fsmc driver
* support for imx7 in the gpmi driver
* finalization of the denali driver rework (thanks to Masahiro for the
work he's done on this driver)
* fix "bitflips in erased pages" handling in the ifc driver
* addition of PM ops and dynamic timing configuration to the atmel
driver
And as usual we also have a few minor cleanup/fixes/improvements
patches across the subsystem.
"""
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The binding bus/ti-gpmc.txt has been moved to
memory-controllers/omap-gpmc.txt. Update all references to this in
order to make reading and understanding a given binding easier.
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc:Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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The binding says that the compatible string must be "ti,am33xx-elm"
but the code checks only for, and all functioning users set, this as
"ti,am3352-elm" so correct the binding.
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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Add two compatible strings for UniPhier SoC family.
"socionext,uniphier-denali-nand-v5a" is used on UniPhier sLD3, LD4,
Pro4, sLD8.
"socionext,uniphier-denali-nand-v5b" is used on UniPhier Pro5, PXs2,
LD6b, LD11, LD20.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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This driver was originally written for the Intel MRST platform with
several platform-specific parameters hard-coded.
Currently, the ECC settings are hard-coded as follows:
#define ECC_SECTOR_SIZE 512
#define ECC_8BITS 14
#define ECC_15BITS 26
Therefore, the driver can only support two cases.
- ecc.size = 512, ecc.strength = 8 --> ecc.bytes = 14
- ecc.size = 512, ecc.strength = 15 --> ecc.bytes = 26
However, these are actually customizable parameters, for example,
UniPhier platform supports the following:
- ecc.size = 1024, ecc.strength = 8 --> ecc.bytes = 14
- ecc.size = 1024, ecc.strength = 16 --> ecc.bytes = 28
- ecc.size = 1024, ecc.strength = 24 --> ecc.bytes = 42
So, we need to handle the ECC parameters in a more generic manner.
Fortunately, the Denali User's Guide explains how to calculate the
ecc.bytes. The formula is:
ecc.bytes = 2 * CEIL(13 * ecc.strength / 16) (for ecc.size = 512)
ecc.bytes = 2 * CEIL(14 * ecc.strength / 16) (for ecc.size = 1024)
For DT platforms, it would be reasonable to allow DT to specify ECC
strength by either "nand-ecc-strength" or "nand-ecc-maximize". If
none of them is specified, the driver will try to meet the chip's ECC
requirement.
For PCI platforms, the max ECC strength is used to keep the original
behavior.
Newer versions of this IP need ecc.size and ecc.steps explicitly
set up via the following registers:
CFG_DATA_BLOCK_SIZE (0x6b0)
CFG_LAST_DATA_BLOCK_SIZE (0x6c0)
CFG_NUM_DATA_BLOCKS (0x6d0)
For older IP versions, write accesses to these registers are just
ignored.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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Add MT2712 NAND Flash Controller dt bindings documentation.
Signed-off-by: Xiaolei Li <xiaolei.li@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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The clock requirements are completely missing, add the clocks
currently required by the driver.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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A number of NAND chips support a feature called on-die ECC, where the
NAND chip itself is capable of doing error detection and correction. The
new "on-die" value for nand-ecc-mode indicates that we want this
functionality to be used.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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Currently the only documented partitioning is "fixed-partitions" but
there are more methods in use that we may want to support in the future.
Mention them and make it clear Fixed Partitions are just a single case.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Rob Herring <robh@kernel.org>
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The mchp23lcv1024 is similar to the mchp23k256, the differences (from a
software point of view) are the capacity of the chip and the size of the
addresses used.
There is no way to detect the specific chip so we must be told via a
Device Tree or default to mchp23k256 when device tree is not used.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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This allows registering of this device via a Device Tree.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"This release cycle's changes include mostly updates and cleanups to
existing drivers along with a few cleanups to the core, documentation
and device tree bindings"
* tag 'pwm/for-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm:
pwm: cros-ec: Fix transposed param settings
pwm: meson: Improve PWM calculation precision
dt-bindings: pwm: meson: Add compatible for gxbb ao PWMs
pwm: meson: Add compatible for the gxbb ao PWMs
pwm: sun4i: Drop legacy callbacks
pwm: sun4i: Switch to atomic PWM
pwm: sun4i: Improve hardware read out
pwm: hibvt: Constify hibvt_pwm_ops
pwm: Silently error out on EPROBE_DEFER
pwm: Standardize document format
pwm: bfin: Remove unneeded error message
dt-bindings: pwm: Update STM32 timers clock names
dt-bindings: pwm: Add R-Car M3-W device tree bindings
pwm: tegra: Set maximum pwm clock source per SoC tapeout
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Add compatible string to properly handle the PWMs found in the AO domain
of the gxbb (and gxl) family.
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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Clock name has been updated during driver/DT binding review:
https://lkml.org/lkml/2016/12/13/718
Update DT binding doc to reflect this.
Fixes: cd9a99c2f8e8 (dt-bindings: pwm: Add STM32 bindings)
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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Add device tree bindings for the PWM controller found on R-Car M3-W SoCs.
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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