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2018-03-16arch: remove blackfin portArnd Bergmann
The Analog Devices Blackfin port was added in 2007 and was rather active for a while, but all work on it has come to a standstill over time, as Analog have changed their product line-up. Aaron Wu confirmed that the architecture port is no longer relevant, and multiple people suggested removing blackfin independently because of some of its oddities like a non-working SMP port, and the amount of duplication between the chip variants, which cause extra work when doing cross-architecture changes. Link: https://docs.blackfin.uclinux.org/ Acked-by: Aaron Wu <Aaron.Wu@analog.com> Acked-by: Bryan Wu <cooloney@gmail.com> Cc: Steven Miao <realmz6@gmail.com> Cc: Mike Frysinger <vapier@chromium.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2017-11-16Merge tag 'pinctrl-v4.15-1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin control updates from Linus Walleij: "This is the bulk of pin control changes for the v4.15 kernel cycle: Core: - The pin control Kconfig entry PINCTRL is now turned into a menuconfig option. This obviously has the implication of making the subsystem menu visible in menuconfig. This is happening because of two things: (a) Intel have started to deploy and depend on pin controllers in a way that is affecting users directly. This happens on the highly integrated laptop chipsets named after geographical places: baytrail, broxton, cannonlake, cedarfork, cherryview, denverton, geminilake, lewisburg, merrifield, sunrisepoint... It started a while back and now it is ever more evident that this is crucial infrastructure for x86 laptops and not an embedded obscurity anymore. Users need to be aware. (b) Pin control expanders on I2C and SPI that are arch-agnostic. Currently Semtech SX150X and Microchip MCP28x08 but more are expected. Users will have to be able to configure these in directly for their set-up. - Just go and select GPIOLIB now that we made sure that GPIOLIB is a very vanilla subsystem. Do not depend on it, if we need it, select it. - Exposing the pin control subsystem in menuconfig uncovered a bunch of obscure bugs that are now hopefully fixed, all more or less pertaining to Blackfin. - Unified namespace for cross-calls between pin control and GPIO. - New support for clock skew/delay generic DT bindings and generic pin config options for this. - Minor documentation improvements. Various: - The Renesas SH-PFC pin controller has evolved a lot. It seems Renesas are churning out new SoCs by the minute. - A bunch of non-critical fixes for the Rockchip driver. - Improve the use of library functions instead of open coding. - Support the MCP28018 variant in the MCP28x08 driver. - Static constifying" * tag 'pinctrl-v4.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (91 commits) pinctrl: gemini: Fix missing pad descriptions pinctrl: Add some depends on HAS_IOMEM pinctrl: samsung/s3c24xx: add CONFIG_OF dependency pinctrl: gemini: Fix GMAC groups pinctrl: qcom: spmi-gpio: Add pmi8994 gpio support pinctrl: ti-iodelay: remove redundant unused variable dev pinctrl: max77620: Use common error handling code in max77620_pinconf_set() pinctrl: gemini: Implement clock skew/delay config pinctrl: gemini: Use generic DT parser pinctrl: Add skew-delay pin config and bindings pinctrl: armada-37xx: Add edge both type gpio irq support pinctrl: uniphier: remove eMMC hardware reset pin-mux pinctrl: rockchip: Add iomux-route switching support for rk3288 pinctrl: intel: Add Intel Cedar Fork PCH pin controller support pinctrl: intel: Make offset to interrupt status register configurable pinctrl: sunxi: Enforce the strict mode by default pinctrl: sunxi: Disable strict mode for old pinctrl drivers pinctrl: sunxi: Introduce the strict flag pinctrl: sh-pfc: Save/restore registers for PSCI system suspend pinctrl: sh-pfc: r8a7796: Use generic IOCTRL register description ...
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman
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>
2017-10-19pinctrl: adi2: Fix Kconfig build problemLinus Walleij
The build robot is complaining on Blackfin: drivers/pinctrl/pinctrl-adi2.c: In function 'port_setup': >> drivers/pinctrl/pinctrl-adi2.c:221:21: error: dereferencing pointer to incomplete type 'struct gpio_port_t' writew(readw(&regs->port_fer) & ~BIT(offset), ^~ drivers/pinctrl/pinctrl-adi2.c: In function 'adi_gpio_ack_irq': >> drivers/pinctrl/pinctrl-adi2.c:266:18: error: dereferencing pointer to incomplete type 'struct bfin_pint_regs' if (readl(&regs->invert_set) & pintbit) ^~ It seems the driver need to include <asm/gpio.h> and <asm/irq.h> to compile. The Blackfin architecture was re-defining the Kconfig PINCTRL symbol which is not OK, so replaced this with PINCTRL_BLACKFIN_ADI2 which selects PINCTRL and PINCTRL_ADI2 just like most arches do. Further, the old GPIO driver symbol GPIO_ADI was possible to select at the same time as selecting PINCTRL. This was not working because the arch-local <asm/gpio.h> header contains an explicit #ifndef PINCTRL clause making compilation break if you combine them. The same is true for DEBUG_MMRS. Make sure the ADI2 pinctrl driver is not selected at the same time as the old GPIO implementation. (This should be converted to use gpiolib or pincontrol and move to drivers/...) Also make sure the old GPIO_ADI driver or DEBUG_MMRS is not selected at the same time as the new PINCTRL implementation, and only make PINCTRL_ADI2 selectable for the Blackfin families that actually have it. This way it is still possible to add e.g. I2C-based pin control expanders on the Blackfin. Cc: Steven Miao <realmz6@gmail.com> Cc: Huanhuan Feng <huanhuan.feng@analog.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2013-07-04consolidate per-arch stack overflow debugging optionsDave Hansen
Original posting: http://lkml.kernel.org/r/20121214184202.F54094D9@kernel.stglabs.ibm.com Several architectures have similar stack debugging config options. They all pretty much do the same thing, some with slightly differing help text. This patch changes the architectures to instead enable a Kconfig boolean, and then use that boolean in the generic Kconfig.debug to present the actual menu option. This removes a bunch of duplication and adds consistency across arches. Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> Reviewed-by: H. Peter Anvin <hpa@zytor.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Acked-by: Chris Metcalf <cmetcalf@tilera.com> [for tile] Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-05-21blackfin: bf60x: pm: Add a debug option to calculate kernel wakeup time.Sonic Zhang
Display the total time when kernel resumes normal from standby or suspend to mem mode. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2011-05-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: (37 commits) Blackfin: use new common PERCPU_INPUT define MAINTAINERS: Fix Analog Devices mailinglist address Blackfin: boards: update ASoC resources after machine driver overhaul Blackfin: work around anomaly 05000480 Blackfin: fix addr type with bfin_write_{or,and} helpers Blackfin: convert /proc/sram to seq_file Blackfin: switch /proc/gpio to seq_file Blackfin: fix indentation with bfin_read() helper Blackfin: convert old cpumask API to new one Blackfin: don't touch task->cpus_allowed directly Blackfin: don't touch cpu_possible_map and cpu_present_map directly Blackfin: bf548-ezkit/bf561-ezkit: update nor flash layout Blackfin: initial perf_event support Blackfin: update anomaly lists to latest public info Blackfin: use on-chip reset func with newer parts Blackfin: bf533-stamp/bf537-stamp: drop ad1980 from defconfigs Blackfin: optimize MMR reads during startup a bit Blackfin: bf537: demux port H mask A and emac rx ints Blackfin: bf537: fix excessive gpio int demuxing Blackfin: bf54x: drop unused pm gpio handling ...
2011-05-25lib: consolidate DEBUG_STACK_USAGE optionStephen Boyd
Most arches define CONFIG_DEBUG_STACK_USAGE exactly the same way. Move it to lib/Kconfig.debug so each arch doesn't have to define it. This obviously makes the option generic, but that's fine because the config is already used in generic code. It's not obvious to me that sysrq-P actually does anything caution by keeping the most inclusive wording. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Chris Metcalf <cmetcalf@tilera.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Richard Weinberger <richard@nod.at> Acked-by: Mike Frysinger <vapier@gentoo.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Hirokazu Takata <takata@linux-m32r.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Lennox Wu <lennox.wu@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-25Blackfin: first pass at debug mmr supportMike Frysinger
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2010-10-25Blackfin: drop unused irq_panic()/DEBUG_ICACHE_CHECKMike Frysinger
This code was useful during early port development when our icache code wasn't solid, but that ship has sailed long ago, and no code calls this function anymore (irq_panic). So punt it. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-22Blackfin: allow NMI watchdog to be used w/RETN as a scratch regGraf Yang
NMIs are not safe to return from because many anomaly workarounds are implemented by disabling interrupts. The NMI obviously violates this assumption. Since the NMI watchdog never returns, we don't have to worry about it clobbering RETN when it is being used as a scratch register with the exception stack. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-05-22Blackfin: add support for the DBGA (debug assert) pseudo insnRobin Getz
A few pseudo debug insns exist to make testing of simulators easier. Since these don't actually exist in the hardware, we have to have the exception handler take care of emulating these. This allows sim test cases to be executed unmodified under Linux and thus simplify debugging greatly. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: move KGDB selection to the way other arches do itMike Frysinger
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2010-03-09Blackfin: implement nmi_watchdog for SMP on BF561Graf Yang
Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-16Blackfin: add some isram-driver self testsMike Frysinger
Make it easy to figure out if code changes here are correct. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12Blackfin: make deferred hardware errors more exactRobin Getz
Hardware errors on the Blackfin architecture are queued by nature of the hardware design. Things that could generate a hardware level queue up at the system interface and might not process until much later, at which point the system would send a notification back to the core. As such, it is possible for user space code to do something that would trigger a hardware error, but have it delay long enough for the process context to switch. So when the hardware error does signal, we mistakenly evaluate it as a different process or as kernel context and panic (erp!). This makes it pretty difficult to find the offending context. But wait, there is good news somewhere. By forcing a SSYNC in the interrupt entry, we force all pending queues at the system level to be processed and all hardware errors to be signaled. Then we check the current interrupt state to see if the hardware error is now signaled. If so, we re-queue the current interrupt and return thus allowing the higher priority hardware error interrupt to process properly. Since we haven't done any other context processing yet, the right context will be selected and killed. There is still the possibility that the exact offending instruction will be unknown, but at least we'll have a much better idea of where to look. The downside of course is that this causes system-wide syncs at every interrupt point which results in significant performance degradation. Since this situation should not occur in any properly configured system (as hardware errors are triggered by things like bad pointers), make it a debug configuration option and disable it by default. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-03-02Blackfin arch: use common KGDB_TESTS rather than our own KGDB_TESTCASEMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: change HWTRACE Kconfig and set it on defaultMike Frysinger
change the hwtrace description to be less confusing and default it to on (since there shouldnt be any crashes in the miss handler code itself) Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: merge kgdb test code using common CONFIG_KGDB_TESTSMike Frysinger
[Grace Pan <grace.pan@analog.com>: Add case for kgdb test in l1 and l2] Signed-off-by: Grace Pan <grace.pan@analog.com> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2009-01-07Blackfin arch: Add basic irq stack checking for BlackfinRobin Getz
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-10Blackfin arch: Add optional verbose debugRobin Getz
Add optional verbose debug - which when turned off, quiets down userspace errors. Saves ~8k of code/data for production systems Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-09Blackfin arch: early prink code still use uart core console functions to ↵Sonic Zhang
parse and set configure option string Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-13Blackfin arch: add supporting for kgdbSonic Zhang
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-10-08Blackfin arch: add supporting for double fault debug handlingRobin Getz
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-07-19Blackfin arch: Do not need this dualcore test module in kernel.Yi Li
Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
2008-02-02[Blackfin] arch: add slightly better help text for CPLB_INFOMike Frysinger
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-21Blackfin arch: split debug stuff off into Kconfig.debug like everyone elseMike Frysinger
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>