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Choosing big-endian vs little-endian kernels in Kconfig has not worked
correctly since the introduction of CONFIG_ARCH_MULTIPLATFORM a long
time ago.
The problems is that CONFIG_BIG_ENDIAN depends on
ARCH_SUPPORTS_BIG_ENDIAN, which can set by any one platform
in the config, but would actually have to be supported by all
of them.
This was mostly ok for ARMv6/ARMv7 builds, since these are BE8 and
tend to just work aside from problems in nonportable device drivers.
For ARMv4/v5 machines, CONFIG_BIG_ENDIAN and CONFIG_ARCH_MULTIPLATFORM
were never set together, so this was disabled on all those machines
except for IXP4xx.
As IXP4xx can now become part of ARCH_MULTIPLATFORM, it seems better to
formalize this logic: all ARMv4/v5 platforms get an explicit dependency
on being either big-endian (ixp4xx) or little-endian (the rest). We may
want to fix ixp4xx in the future to support both, but it does not work
in LE mode at the moment.
For the ARMv6/v7 platforms, there are two ways this could be handled
a) allow both modes only for platforms selecting
'ARCH_SUPPORTS_BIG_ENDIAN' today, but only LE mode for the
others, given that these were added intentionally at some
point.
b) allow both modes everwhere, given that it was already possible
to build that way by e.g. selecting ARCH_VIRT, and that the
list is not an accurate reflection of which platforms may or
may not work.
Out of these, I picked b) because it seemed slighly more logical
to me.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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It is possible to build MMU-less kernels for Cortex-M base
microcrontrollers as well as a couple of older platforms that
have not been converted to CONFIG_ARCH_MULTIPLATFORM,
specifically ep93xx, footbridge, dove, sa1100 and s3c24xx.
It seems unlikely that anybody has tested those configurations
in recent years, as even building them is frequently broken.
A patch I submitted caused another build time regression
in this configuration. I sent a patch for that, but it seems
better to also remove the option entirely, leaving ARMv7-M
as the only supported Arm NOMMU target for simplicity.
A couple of platforms have dependencies on CONFIG_MMU, those
can all be removed now. Notably, mach-integrator tries to
support MMU-less CPU cores, but those have not actually been
selectable for a long time.
This addresses several build failures in randconfig builds that
have accumulated over the years.
Cc: Vladimir Murzin <vladimir.murzin@arm.com>
Cc: Russell King <linux@armlinux.org.uk>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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After transitioning the CLCD to use DRM we can now kill off
the final piece of auxdata on the NSPIRE.
Link: https://lore.kernel.org/r/20190810075023.7327-1-linus.walleij@linaro.org
Cc: Daniel Tang <dt.tangr@gmail.com>
Cc: Fabian Vogt <fabian@ritter-vogt.de>
Tested-by: Fabian Vogt <fabian@ritter-vogt.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Based on 2 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license version 2 as
published by the free software foundation #
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 4122 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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nspire_map_io() just calls debug_ll_io_init().
If machine_desc.map_io is not set, devicemaps_init() in the
common ARM code will call debug_ll_io_init(), so nspire_map_io() and the
initialization of .map_io can be removed.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull DeviceTree updates from Rob Herring:
- remove most of_platform_populate() calls in arch code. Now the DT
core code calls it in the default case and platforms only need to
call it if they have special needs
- use pr_fmt on all the DT core print statements
- CoreSight binding doc improvements to block name descriptions
- add dt_to_config script which can parse dts files and list
corresponding kernel config options
- fix memory leak hit with a PowerMac DT
- correct a bunch of STMicro compatible strings to use the correct
vendor prefix
- fix DA9052 PMIC binding doc to match what is actually used in dts
files
* tag 'devicetree-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (35 commits)
documentation: da9052: Update regulator bindings names to match DA9052/53 DTS expectations
xtensa: Partially Revert "xtensa: Remove unnecessary of_platform_populate with default match table"
xtensa: Fix build error due to missing include file
MIPS: ath79: Add missing include file
Fix spelling errors in Documentation/devicetree
ARM: dts: fix STMicroelectronics compatible strings
powerpc/dts: fix STMicroelectronics compatible strings
Documentation: dt: i2c: use correct STMicroelectronics vendor prefix
scripts/dtc: dt_to_config - kernel config options for a devicetree
of: fdt: mark unflattened tree as detached
of: overlay: add resolver error prints
coresight: document binding acronyms
Documentation/devicetree: document cavium-pip rx-delay/tx-delay properties
of: use pr_fmt prefix for all console printing
of/irq: Mark initialised interrupt controllers as populated
of: fix memory leak related to safe_name()
Revert "of/platform: export of_default_bus_match_table"
of: unittest: use of_platform_default_populate() to populate default bus
memory: omap-gpmc: use of_platform_default_populate() to populate default bus
bus: uniphier-system-bus: use of_platform_default_populate() to populate default bus
...
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Use helper of_platform_default_populate() in linux/of_platform
when possible, instead of calling of_platform_populate() with
the default match table.
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Krzysztof Halasa <khalasa@piap.pl>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Roland Stigge <stigge@antcom.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Ray Jui <rjui@broadcom.com>
Cc: Viresh Kumar <vireshk@kernel.org>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Rob Herring <robh@kernel.org>
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Change the Kconfig option logic to fullfil with the current approach.
A new Kconfig option is added, CONFIG_NSPIRE_TIMER and is selected by the
platform. Then the clocksource's Kconfig is changed to make this option
selectable by the user if the COMPILE_TEST option is set. Otherwise, it is
up to the platform's Kconfig to select the timer.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Arnd Bergmann:
"A few simple cleanups across multiple platforms, not much standing
out:
- lpc32xx removes its private implementation of the clk API, after
generic code was merged in 4.5
- all unused Makefile.boot files get removed
- a number of simplifications for shmobile
- asm/clkdev.h gets replaced with the asm-generic version after all
mach/clkdev.h implementations are gone"
* tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: shmobile: Kconfig: Get rid of old comment
ARM: shmobile: Consolidate SCU mapping code
arm: lpc32xx: remove direct control of GPIOs from shared mach file
arm: lpc32xx: remove selected HAVE_IDE
arm: lpc32xx: switch to common clock framework
ARM: Use generic clkdev.h header
ARM: plat-versatile: Remove unused clock.c file
ARM: netx: remove redundant "depends on ARCH_NETX"
ARM: integrator: remove redundant select in Kconfig
ARM: drop unused Makefile.boot of Multiplatform SoCs
ARM: mvebu: add missing of_node_put()
ARM: shmobile: r8a7779: Remove remainings of removed SCU boot setup code
ARM: shmobile: Typo s/MIPDR/MPIDR/
ARM: shmobile: Add includes providing forward declarations
ARM: shmobile: rcar-gen2: Make rcar_gen2_dma_contiguous static
ARM: mv78xx0: use "depends on" instead of "if" after prompt
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The variable "MACHINE" is empty if CONFIG_ARCH_MULTIPLATFORM=y,
so these Makefile.boot files are never included.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Michal Simek <michal.simek@xilinx.com> (for Zynq)
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
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Rename dma_*_writecombine() to dma_*_wc(), so that the naming
is coherent across the various write-combining APIs. Keep the
old names for compatibility for a while, these can be removed
at a later time. A guard is left to enable backporting of the
rename, and later remove of the old mapping defines seemlessly.
Build tested successfully with allmodconfig.
The following Coccinelle SmPL patch was used for this simple
transformation:
@ rename_dma_alloc_writecombine @
expression dev, size, dma_addr, gfp;
@@
-dma_alloc_writecombine(dev, size, dma_addr, gfp)
+dma_alloc_wc(dev, size, dma_addr, gfp)
@ rename_dma_free_writecombine @
expression dev, size, cpu_addr, dma_addr;
@@
-dma_free_writecombine(dev, size, cpu_addr, dma_addr)
+dma_free_wc(dev, size, cpu_addr, dma_addr)
@ rename_dma_mmap_writecombine @
expression dev, vma, cpu_addr, dma_addr, size;
@@
-dma_mmap_writecombine(dev, vma, cpu_addr, dma_addr, size)
+dma_mmap_wc(dev, vma, cpu_addr, dma_addr, size)
We also keep the old names as compatibility helpers, and
guard against their definition to make backporting easier.
Generated-by: Coccinelle SmPL
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: airlied@linux.ie
Cc: akpm@linux-foundation.org
Cc: benh@kernel.crashing.org
Cc: bhelgaas@google.com
Cc: bp@suse.de
Cc: dan.j.williams@intel.com
Cc: daniel.vetter@ffwll.ch
Cc: dhowells@redhat.com
Cc: julia.lawall@lip6.fr
Cc: konrad.wilk@oracle.com
Cc: linux-fbdev@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: luto@amacapital.net
Cc: mst@redhat.com
Cc: tomi.valkeinen@ti.com
Cc: toshi.kani@hp.com
Cc: vinod.koul@intel.com
Cc: xen-devel@lists.xensource.com
Link: http://lkml.kernel.org/r/1453516462-4844-1-git-send-email-mcgrof@do-not-panic.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The ARM Dual-Timer SP804 module is peripheral found not only on ARM32
platforms but also on ARM64 platforms.
This patch moves the driver out of arch/arm to driver/clocksource
so that it can be used on ARM64 platforms also.
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Olof Johansson <olof@lixom.net>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The definition
static const char *axxia_dt_match[] __initconst = {
...
defines a changable array of constant strings. That is you must not do:
*axxia_dt_match[0] = 'k';
but
axxia_dt_match[0] = "different string";
is fine. So the annotation __initconst is wrong and yields a compiler
error when other really const variables are added with __initconst.
As the struct machine_desc member dt_compat is declared as
const char *const *dt_compat;
making the arrays const is the better alternative over changing all
annotations to __initdata.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Arnd Bergmann:
"These cleanup patches are mainly move stuff around and should all be
harmless. They are mainly split out so that other branches can be
based on top to avoid conflicts.
Notable changes are:
- We finally remove all mach/timex.h, after CLOCK_TICK_RATE is no
longer used (Uwe Kleine-König)
- The Qualcomm MSM platform is split out into legacy mach-msm and
new-style mach-qcom, to allow easier maintainance of the new
hardware support without regressions (Kumar Gala)
- A rework of some of the Kconfig logic to simplify multiplatform
support (Rob Herring)
- Samsung Exynos gets closer to supporting multiplatform (Sachin
Kamat and others)
- mach-bcm3528 gets merged into mach-bcm (Stephen Warren)
- at91 gains some common clock framework support (Alexandre Belloni,
Jean-Jacques Hiblot and other French people)"
* tag 'cleanup-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (89 commits)
ARM: hisi: select HAVE_ARM_SCU only for SMP
ARM: efm32: allow uncompress debug output
ARM: prima2: build reset code standalone
ARM: at91: add PWM clock
ARM: at91: move sam9261 SoC to common clk
ARM: at91: prepare common clk transition for sam9261 SoC
ARM: at91: updated the at91_dt_defconfig with support for the ADS7846
ARM: at91: dt: sam9261: Device Tree support for the at91sam9261ek
ARM: at91: dt: defconfig: Added the sam9261 to the list of DT-enabled SOCs
ARM: at91: dt: Add at91sam9261 dt SoC support
ARM: at91: switch sam9rl to common clock framework
ARM: at91/dt: define main clk frequency of at91sam9rlek
ARM: at91/dt: define at91sam9rl clocks
ARM: at91: prepare common clk transition for sam9rl SoCs
ARM: at91: prepare sam9 dt boards transition to common clk
ARM: at91: dt: sam9rl: Device Tree for the at91sam9rlek
ARM: at91/defconfig: Add the sam9rl to the list of DT-enabled SOCs
ARM: at91: Add at91sam9rl DT SoC support
ARM: at91: prepare at91sam9rl DT transition
ARM: at91/defconfig: refresh at91sam9260_9g20_defconfig
...
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Multi-platform requires various kconfig options to be selected, so
platforms don't need to select them individually.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
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CC arch/arm/mach-nspire/nspire.o
arch/arm/mach-nspire/nspire.c:79:2: warning: initialization from incompatible pointer type [enabled by default]
arch/arm/mach-nspire/nspire.c:79:2: warning: (near initialization for '__mach_desc_NSPIRE.restart') [enabled by default]
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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With arch/arm calling of_clk_init(NULL) from time_init(), we can now
remove custom .init_time hooks.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
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This patch adds support for the TI-Nspire platform.
Changes between v1 and v2:
* Added GENERIC_IRQ_CHIP to platform Kconfig
Signed-off-by: Daniel Tang <dt.tangr@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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