linux-stable.git/Documentation/arm, branch linux-3.18.y

ARM: 8833/1: Ensure that NEON code always compiles with Clang

2019-04-27T07:30:23+00:00

[ Upstream commit de9c0d49d85dc563549972edc5589d195cd5e859 ]

While building arm32 allyesconfig, I ran into the following errors:

  arch/arm/lib/xor-neon.c:17:2: error: You should compile this file with
  '-mfloat-abi=softfp -mfpu=neon'

  In file included from lib/raid6/neon1.c:27:
  /home/nathan/cbl/prebuilt/lib/clang/8.0.0/include/arm_neon.h:28:2:
  error: "NEON support not enabled"

Building V=1 showed NEON_FLAGS getting passed along to Clang but
__ARM_NEON__ was not getting defined. Ultimately, it boils down to Clang
only defining __ARM_NEON__ when targeting armv7, rather than armv6k,
which is the '-march' value for allyesconfig.

>From lib/Basic/Targets/ARM.cpp in the Clang source:

  // This only gets set when Neon instructions are actually available, unlike
  // the VFP define, hence the soft float and arch check. This is subtly
  // different from gcc, we follow the intent which was that it should be set
  // when Neon instructions are actually available.
  if ((FPU & NeonFPU) && !SoftFloat && ArchVersion >= 7) {
    Builder.defineMacro("__ARM_NEON", "1");
    Builder.defineMacro("__ARM_NEON__");
    // current AArch32 NEON implementations do not support double-precision
    // floating-point even when it is present in VFP.
    Builder.defineMacro("__ARM_NEON_FP",
                        "0x" + Twine::utohexstr(HW_FP & ~HW_FP_DP));
  }

Ard Biesheuvel recommended explicitly adding '-march=armv7-a' at the
beginning of the NEON_FLAGS definitions so that __ARM_NEON__ always gets
definined by Clang. This doesn't functionally change anything because
that code will only run where NEON is supported, which is implicitly
armv7.

Link: https://github.com/ClangBuiltLinux/linux/issues/287

Suggested-by: Ard Biesheuvel 
Signed-off-by: Nathan Chancellor 
Acked-by: Nicolas Pitre 
Reviewed-by: Nick Desaulniers 
Reviewed-by: Stefan Agner 
Signed-off-by: Russell King 
Signed-off-by: Sasha Levin

Documentation: Remove ZBOOT MMC/SDHI utility and docs

2017-02-08T08:43:05+00:00

commit c6535e1e0361157ea073b57b626d0611b7c4c7a0 upstream.

Remove ZBOOT MMC/SDHI Documentation for sh7372 together
wit the vrl4 utility. Without sh7372 and Mackerel support
these files are no longer useful.

Signed-off-by: Magnus Damm 
Acked-by: Laurent Pinchart 
Acked-by: Geert Uytterhoeven 
Signed-off-by: Simon Horman 
[removes a build warning in 3.18, and as this chip never was made, it is
 safe to remove the documentation here.  The code was removed in 4.1.
 - gregkh]
Signed-off-by: Greg Kroah-Hartman

bus: arm-ccn: Provide required event arguments

2016-12-23T14:40:28+00:00

[ Upstream commit 8f06c51fac1ca4104b8b64872f310e28186aea42 ]

Since 688d4dfcdd624192cbf03c08402e444d1d11f294 "perf tools: Support
parsing parameterized events" the perf userspace tools understands
"argument=?" syntax in the events file, making sure that required
arguments are provided by the user and not defaulting to 0, causing
confusion.

This patch adds the required arguments lists for CCN events.

Signed-off-by: Pawel Moll 
Signed-off-by: Sasha Levin

Merge tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2014-10-08T21:22:23+00:00

Pull ARM SoC DT updates from Arnd Bergmann:
 "As usual, this is the largest branch, though this time a little under
  half of the total changes with 307 individual non-merge changesets.

  The largest changes are the addition of new machines, in particular
  the Tegra based Chromebook, the Renesas r8a7794 SoC, and DT support
  for the old i.MX1 platform.

  Other changes include
   - at91: various sam9 and sama5 updates
   - exynos: much extended Peach Pi/Pit (Chromebook 2) support
   - keystone: new peripherals
   - meson: added DT for meson6 SoC
   - mvebu: new device support for Armada 370/375
   - qcom: improved support for IPQ8064 and MSM8x60
   - rockchip: much improved support for rk3288
   - shmobile: lots of updates all over the place
   - sunxi: dts license change
   - sunxi: more a23 device support
   - vexpress: CLCD DT description"

* tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (308 commits)
  ARM: DTS: meson: update DTSI to add watchdog node
  ARM: dts: keystone-k2l: fix mdio io start address
  ARM: dts: keystone-k2e: fix mdio io start address
  ARM: dts: keystone-k2e: update usb1 node for dma properties
  ARM: dts: keystone: fix io range for usb_phy0
  Revert "Merge tag 'hix5hd2-dt-for-3.18' of git://github.com/hisilicon/linux-hisi into next/dt"
  Revert "ARM: dts: hix5hd2: add wdg node"
  ARM: dts: add rk3288 i2s controller
  ARM: vexpress: Add CLCD Device Tree properties
  ARM: bcm2835: add I2S pinctrl to device tree
  ARM: meson: documentation: add bindings documentation
  ARM: meson: dts: add basic Meson/Meson6/Meson6-atv1200 DTSI/DTS
  ARM: dts: mt6589: Change compatible string for GIC
  ARM: dts: mediatek: Add compatible property for aquaris5
  ARM: dts: mt6589-aquaris5: Add boot argument earlyprintk
  ARM: dts: mt6589: Fix typo in GIC unit address
  ARM: dts: Build dtb for Mediatek board
  ARM: dts: keystone: fix bindings for pcie and usb clock nodes
  ARM: dts: keystone: k2l: Fix chip selects for SPI devices
  ARM: dts: keystone: add dsp gpio controllers nodes
  ...

Documentation: update .gitignore files

2014-09-26T09:02:59+00:00

Add some missing files to .gitignore.
Push Documentation/.gitignore down into subdirectories.

Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

Documentation: support glibc versions without htole macros

2014-09-26T09:02:58+00:00

glibc 2.9 introduced the htole<16/32/64> macros, add them to
tools/include to support older versions of glibc.

Reported-by: Andrew Morton 
Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

Documentation: make functions static to avoid prototype warnings

2014-09-26T09:02:56+00:00

Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

Documentation: add makefiles for more targets

2014-09-26T09:02:56+00:00

Add a bunch of previously unbuilt source files to the Documentation build
machinery.

Signed-off-by: Peter Foley 
Signed-off-by: Randy Dunlap 
Signed-off-by: Jiri Kosina

Documentation: arm: add hardware datasheet reference for Marvell Armada XP

2014-09-17T15:00:41+00:00

Some time ago, the "Function Specifications" for the Marvell Armada XP
processor has been released. However, the "Hardware Specifications"
were not released at the same time. They have now been released
publicly, so this commit updates the Marvell documentation file with
the references to this new documentation.

Three documents are available, one for each of the three variants of
Armada XP: 78230, 78260 and 78460.

Signed-off-by: Thomas Petazzoni 
Link: https://lkml.kernel.org/r/1410896277-32476-1-git-send-email-thomas.petazzoni@free-electrons.com
Signed-off-by: Jason Cooper

Merge tag 'drivers-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2014-08-08T18:34:32+00:00

Pull ARM SoC driver changes from Olof Johansson:
 "A handful of driver-related changes.  We've had a bunch of them going
  in through other branches as well, so it's only a part of what we
  really have this release.

  Larger pieces are:

   - Removal of a now unused PWM driver for atmel
     [ This includes AVR32 changes that have been appropriately acked ]
   - Performance counter support for the arm CCN interconnect
   - OMAP mailbox driver cleanups and consolidation
   - PCI and SATA PHY drivers for SPEAr 13xx platforms
   - Redefinition (with backwards compatibility!) of PCI DT bindings for
     Tegra to better model regulators/power"

Note: this merge also fixes up the semantic conflict with the new
calling convention for devm_phy_create(), see commit f0ed817638b5 ("phy:
core: Let node ptr of PHY point to PHY and not of PHY provider") that
came in through Greg's USB tree.

Semantic merge patch by Stephen Rothwell  through
the next tree.

* tag 'drivers-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (38 commits)
  bus: arm-ccn: Fix error handling at event allocation
  mailbox/omap: add a parent structure for every IP instance
  mailbox/omap: remove the private mailbox structure
  mailbox/omap: consolidate OMAP mailbox driver
  mailbox/omap: simplify the fifo assignment by using macros
  mailbox/omap: remove omap_mbox_type_t from mailbox ops
  mailbox/omap: remove OMAP1 mailbox driver
  mailbox/omap: use devm_* interfaces
  bus: ARM CCN: add PERF_EVENTS dependency
  bus: ARM CCN PMU driver
  PCI: spear: Remove spear13xx_pcie_remove()
  PCI: spear: Fix Section mismatch compilation warning for probe()
  ARM: tegra: Remove legacy PCIe power supply properties
  PCI: tegra: Remove deprecated power supply properties
  PCI: tegra: Implement accurate power supply scheme
  ARM: SPEAr13xx: Update defconfigs
  ARM: SPEAr13xx: Add pcie and miphy DT nodes
  ARM: SPEAr13xx: Add bindings and dt node for misc block
  ARM: SPEAr13xx: Fix static mapping table
  phy: Add drivers for PCIe and SATA phy on SPEAr13xx
  ...