If we are not changing the control register value, avoid writing to it.
Writes to the control register can be very expensive, taking around a
hundred cycles or so.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Use the more common pr_warn.

Other miscellanea:

o Coalesce formats
o Realign arguments
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This defconfig already enables DEBUG_LL and by default DEBUG_LL_UART_NONE
will be selected (but due to some back compability magic I'd like to
remove is not actually honoured). DEBUG_LL_UART_PL01X is a much saner
default.
Signed-off-by: NDaniel Thompson <daniel.thompson@linaro.org>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This defconfig already enables DEBUG_LL and by default DEBUG_LL_UART_NONE
will be selected (but due to some back compability magic I'd like to
remove is not actually honoured). DEBUG_LL_UART_PL01X is a much saner
default.
Signed-off-by: NDaniel Thompson <daniel.thompson@linaro.org>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

The Brahma-B15's ISAR0 correcty advertises UDIV/SDIV support in both ARM
and Thumb2 modes (CPUID_EXT_ISAR0=02101110), so we don't need to
manually apply this hwcap.

The code in question actually predates the following commit, which made
our hwcaps unnecessary:

    commit 8164f7af
    Author: Stephen Boyd <sboyd@codeaurora.org>
    Date:   Mon Mar 18 19:44:15 2013 +0100

        ARM: 7680/1: Detect support for SDIV/UDIV from ISAR0 register
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This adds the Atmel Micro ASIC platform device and selects it
by default for h3100 and h3600.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

After becoming a mandatory function, boot_secondary() is no longer used
outside arch/arm/kernel/smp.c. Hence remove its public prototype, and,
as suggested by Arnd, let it be absorbed by its single caller.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This tweaks the SHA-1 NEON code slightly so it works correctly under big
endian, and removes the Kconfig condition preventing it from being
selected if CONFIG_CPU_BIG_ENDIAN is set.
Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

On r8a7791, i2c6 (aka iic3) doesn't need pinmux, but the koelsch dts
refers to non-existent pinmux configuration data:

pinmux core: sh-pfc does not support function i2c6
sh-pfc e6060000.pfc: invalid function i2c6 in map table

Remove it to fix this.

Fixes: commit 1d41f36a ("ARM: shmobile:
       koelsch dts: Add VDD MPU regulator for DVFS")
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Working on Gigabit/PCIe support in U-Boot for Apalis T30 I realised
that the current device tree source includes for our modules only
happen to work due to referencing the on-carrier 5v0 supply from USB
which is not at all available on-module. The modules actually contain
TPS60150 charge pumps to generate the PMIC required 5 volts from the
one and only 3.3 volt module supply. This patch fixes this.

(Note: When back-porting this to v3.16 stable releases, simply drop the
change to tegra30-apalis.dtsi; that file was added in v3.17)

Cc: <stable@vger.kernel.org> #v3.16+
Signed-off-by: NMarcel Ziswiler <marcel@ziswiler.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

During the restructuring of the Rockchip Cortex-A9 dtsi files it seems
like the pinctrl settings vanished at some point from the mmc0 support.

This of course renders them unusable, so readd the necessary pinctrl
properties.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>

Currently the sh-intc driver is compiled on all SuperH and
non-multiplatform SH-Mobile platforms, while it's only used on a limited
number of platforms:
  - SuperH: SH2(A), SH3(A), SH4(A)(L) (all but SH5)
  - ARM: sh7372, sh73a0

Drop the "default y" on SH_INTC, make all CPU platforms that use it
select it, and protect all sub-options by "if SH_INTC" to fix this.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: NMagnus Damm <damm+renesas@opensource.se>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

Increase max i2c bus frequency beyond the default for faster
data transfers. According to the manual, these faster speeds are
only available when the board is wired up the right way. In this case,
the vendor kernel has run at this speed for a long time.

sda-delay is needed for talking to RTC on PMIC, otherwise the i2c
controller never sees an ACK. Strangely the other PMIC i2c slave (the
main one) works fine even without this delay. I Chose value 100 to
match the vendor kernel.
Signed-off-by: NDaniel Drake <drake@endlessm.com>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Tested-by: NTomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

The ODROID kernel shows that the PMIC interrupt line is hooked up
to pin GPX3-2.

This is needed for the max77686-irq driver to create the PMIC IRQ
domain, which is needed by max77686-rtc.
Signed-off-by: NDaniel Drake <drake@endlessm.com>
Tested-by: NTomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

The current pinfunc define all uart CTS_B IO port for DCE uart 'CTS_B'
IP port. Since uart IP port 'CTS_B' is output, and it don't need to
set 'SELECT_INPUT' bit.
Signed-off-by: NFugang Duan <B38611@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@freescale.com>

The VPU on i.MX53 has two distinct clocks for register access and
internal function.
Signed-off-by: NLothar Waßmann <LW@KARO-electronics.de>
Fixes: fbf970f6 ("ARM: dts: mx53qsb: Enable VPU support")
Cc: <stable@vger.kernel.org>
Signed-off-by: NShawn Guo <shawn.guo@freescale.com>

On i.MX6Q, gpu2d_axi and gpu3d_axi are either from AXI or
AHB clock, but on i.MX6DL, gpu2d_axi and gpu3d_axi are
from mmdc_ch0_axi_podf, and they can NOT be gated by mmdc_ch0_axi
's clock gate, the mux option register field(CCM_CBCMR)
is marked as "Reserved" now on i.MX6DL RM, so correct these
two clks setting.
Signed-off-by: NAnson Huang <b20788@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@freescale.com>

Signed-off-by: NSilvio Fricke <silvio.fricke@gmail.com>
Signed-off-by: NShawn Guo <shawn.guo@freescale.com>

Previous version had an extra 'fsl' which made the pins not match
any entry.  The console message,

 vf610-pinctrl 40048000.iomuxc: no fsl,pins property in node \
    /soc/aips-bus@40000000/iomuxc@40048000/vf610-twr/esdhc1grp

is displayed without the fix.  The prior version would generally
work as u-boot sets the pins properly for sdhc.  This change allows
Linux sdhc use even if u-boot is built without sdhc support.
Signed-off-by: NBill Pringlemeir <bpringlemeir@nbsps.com>
Acked-by: NStefan Agner <stefan@agner.ch>
Fixes: 0517fe6a ("ARM: dts: vf610-twr: Add support for sdhc1")
Cc: <stable@vger.kernel.org>
Signed-off-by: NShawn Guo <shawn.guo@freescale.com>

Since ARCH_MXC already selects ARCH_HAS_OPP, it's really unnecessary for
SOC_IMX27 and SOC_IMX5 to select it again.
Signed-off-by: NShawn Guo <shawn.guo@freescale.com>

After the suspend routine running in OCRAM puts DDR into self-refresh,
it will access IOMUXC block to float DDR IO for power saving.  A TLB
missing of IOMUXC base address may happen in this case, and triggers an
access to DDR, and thus hangs the system.

The failure is discovered by running suspend/resume on a Cubox-i board.
Though the issue is not Cubox-i specific, it can be hit the on the board
quite easily with the 3.15 or 3.16 kernel.

Fix the issue with a dummy access to IOMUXC block at the beginning of
suspend routine, so that the address translation can be filled into TLB
before DDR is put into self-refresh.
Signed-off-by: NShawn Guo <shawn.guo@freescale.com>
Cc: <stable@vger.kernel.org>
Acked-by: NAnson Huang <Anson.Huang@freescale.com>

My earlier patch 1fc593fe ("ARM: imx: build i.MX6 functions
only when needed") fixed a problem with building an i.MX5 kernel,
but now the problem has returned for the case where we allow
ARMv6K SMP builds in multiplatform. With CONFIG_CPU_V7 disabled,
but i.MX3 and SMP enabled, we get this build error:

arch/arm/mach-imx/built-in.o: In function `v7_secondary_startup':
:(.text+0x5124): undefined reference to `v7_invalidate_l1'

This puts the code inside of an "ifdef CONFIG_SOC_IMX6" to hopefully
do the right thing in all configurations.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NShawn Guo <shawn.guo@freescale.com>

This was introduced in commit e306e3be (Merge tag
'stable/for-linus-3.17-rc0-tag').
Signed-off-by: NDavid Vrabel <david.vrabel@citrix.com>
Acked-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com>

This was caused by commit 5a8da524 ("ARM: dts: exynos5420: add dsi
node"), which conflicted with d51cad7d ("ARM: dts: remove display
power domain for exynos5420").

The DTS addition should never have been merged through the DRM tree in
the first place, and it lacked an ack from the platform maintainer
(who would have known that the disp_pd reference got removed).
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Due to recent consolidation of Exynos suspend and cpuidle code, some
parts of suspend and resume sequences are executed two times, once from
exynos_pm_syscore_ops and then from exynos_cpu_pm_notifier() and thus it
breaks suspend, at least on Exynos4-based boards. In addition, simple
core power down from a cpuidle driver could, in case of CPU 0 could
result in calling functions that are specific to suspend and deeper idle
states.

This patch fixes the issue by moving those operations outside the CPU PM
notifier into suspend and AFTR code paths. This leads to a bit of code
duplication, but allows additional code simplification, so in the end
more code is removed than added.

Fixes: 85f9f908 ("ARM: EXYNOS: Use the cpu_pm notifier for pm")
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Olof Johansson <olof@lixom.net>
Cc: arm@kernel.org
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
[b.zolnierkie: ported patch over current changes]
[b.zolnierkie: fixed exynos_aftr_finisher() return value]
Signed-off-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

The EHCI and HSIC device tree nodes were added in the wrong place.
Fix them.
Signed-off-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NKever Yang <kever.yang@rock-chips.com>
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Add the memfd_create syscall to ARM.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Add the new getrandom syscall for ARM.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This patch fixes booting when idmap pgd lays above 4gb. Commit
4756dcbf mostly had fixed this, but it'd failed to load upper bits.

Also this fixes adding TTBR1_OFFSET to TTRR1: if lower part overflows
carry flag must be added to the upper part.
Signed-off-by: NKonstantin Khlebnikov <k.khlebnikov@samsung.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Load purgatory code in RAM and relocate it based on the location.
Relocation code has been inspired by module relocation code and purgatory
relocation code in kexec-tools.

Also compute the checksums of loaded kexec segments and store them in
purgatory.

Arch independent code provides this functionality so that arch dependent
bootloaders can make use of it.

Helper functions are provided to get/set symbol values in purgatory which
are used by bootloaders later to set things like stack and entry point of
second kernel etc.
Signed-off-by: NVivek Goyal <vgoyal@redhat.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Greg Kroah-Hartman <greg@kroah.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: WANG Chao <chaowang@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Replace obsolete strict_strto with kstrto calls
Signed-off-by: NDaniel Walter <dwalter@google.com>
Cc: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Replace obsolete strict_strto call with kstrto
Signed-off-by: NDaniel Walter <dwalter@google.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Replace obsolete call to strict_strto with kstrto
Signed-off-by: NDaniel Walter <dwalter@google.com>
Cc: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Replace obsolete strict_strto call with kstrto calls.
Simplify copy_from_user/strict_strto by using kstrto_from_user
Signed-off-by: NDaniel Walter <dwalter@google.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Rather than have architectures #define ARCH_HAS_SG_CHAIN in an
architecture specific scatterlist.h, make it a proper Kconfig option and
use that instead.  At same time, remove the header files are are now
mostly useless and just include asm-generic/scatterlist.h.

[sfr@canb.auug.org.au: powerpc files now need asm/dma.h]
Signed-off-by: NLaura Abbott <lauraa@codeaurora.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>			[x86]
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>	[powerpc]
Acked-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The strings used to list IPIs in /proc/interrupts are reused for tracing
purposes.

While at it, prevent a negative ipinr from escaping the range check
in handle_IPI().

Link: http://lkml.kernel.org/p/1406318733-26754-4-git-send-email-nicolas.pitre@linaro.orgAcked-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NNicolas Pitre <nico@linaro.org>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Currently, there are two users on CMA functionality, one is the DMA
subsystem and the other is the KVM on powerpc.  They have their own code
to manage CMA reserved area even if they looks really similar.  From my
guess, it is caused by some needs on bitmap management.  KVM side wants
to maintain bitmap not for 1 page, but for more size.  Eventually it use
bitmap where one bit represents 64 pages.

When I implement CMA related patches, I should change those two places
to apply my change and it seem to be painful to me.  I want to change
this situation and reduce future code management overhead through this
patch.

This change could also help developer who want to use CMA in their new
feature development, since they can use CMA easily without copying &
pasting this reserved area management code.

In previous patches, we have prepared some features to generalize CMA
reserved area management and now it's time to do it.  This patch moves
core functions to mm/cma.c and change DMA APIs to use these functions.

There is no functional change in DMA APIs.
Signed-off-by: NJoonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: NMichal Nazarewicz <mina86@mina86.com>
Acked-by: NZhang Yanfei <zhangyanfei@cn.fujitsu.com>
Acked-by: NMinchan Kim <minchan@kernel.org>
Reviewed-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Alexander Graf <agraf@suse.de>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Gleb Natapov <gleb@kernel.org>
Acked-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Tested-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This patch adds common part of dsi node.
Signed-off-by: NYoungJun Cho <yj44.cho@samsung.com>
Acked-by: NInki Dae <inki.dae@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>

This patch adds mipi-phy node for MIPI DSI device.
Signed-off-by: NYoungJun Cho <yj44.cho@samsung.com>
Acked-by: NInki Dae <inki.dae@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>

This patch adds sysreg property to fimd device node
which is required to use I80 interface.
Signed-off-by: NYoungJun Cho <yj44.cho@samsung.com>
Acked-by: NInki Dae <inki.dae@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NInki Dae <inki.dae@samsung.com>