There's an OF helper called of_dma_is_coherent(), which checks if a
device has a "dma-coherent" property to see if the device is coherent
for DMA.

But on some platforms devices are coherent by default, and on some
platforms it's not possible to update existing device trees to add the
"dma-coherent" property.

So add a Kconfig symbol to allow arch code to tell
of_dma_is_coherent() that devices are coherent by default, regardless
of the presence of the property.

Select that symbol on powerpc when NOT_COHERENT_CACHE is not set, ie.
when the system has a coherent cache.

Fixes: 92ea637e ("of: introduce of_dma_is_coherent() helper")
Cc: stable@vger.kernel.org # v3.16+
Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert the gpio-leds binding to DT schema format.

Drop the last example as the node name collides when built, and it doesn't
add much value.

Cc: Pavel Machek <pavel@ucw.cz>
Cc: Dan Murphy <dmurphy@ti.com>
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert the common LEDs properties bindings to a schema. As trigger source
providers are different nodes, we need to split trigger source properties
to a separate file.

Bindings for LED controllers can reference the common schema for the LED
child nodes:

patternProperties:
  "^led@[0-4]":
    type: object
    allOf:
      - $ref: common.yaml#

Cc: Pavel Machek <pavel@ucw.cz>
Cc: Dan Murphy <dmurphy@ti.com>
Cc: linux-leds@vger.kernel.org
Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert the generic PCI host binding to DT schema. The derivative Juno,
PLDA XpressRICH3-AXI, and Designware ECAM bindings all just vary in
their compatible strings. The simplest way to convert those to
schema is just add them into the common generic PCI host schema.

The HiSilicon ECAM and Cavium ThunderX PEM bindings have an additional
'reg' entry, but are otherwise the same binding as well.

Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Andrew Murray <andrew.murray@arm.com>
Cc: Zhou Wang <wangzhou1@hisilicon.com>
Cc: Will Deacon <will@kernel.org>
Cc: David Daney <david.daney@cavium.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert the Arm Versatile PCI host binding to a DT schema.

Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Andrew Murray <andrew.murray@arm.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>

Make sure the reader of the document is aware that some active
installation of the libyaml development package is required and
provide two examples.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert the STM32 DFSDM bindings to DT schema format
using json-schema.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert STM32 UART bindings to json-schema.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert rs485 binding to yaml style file.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Rob Herring <robh@kernel.org>

On many arm64 qcom device trees, running `make dtbs_check` yells:

  timer@17c20000: #size-cells:0:0: 1 was expected

It appears that someone was trying to assert the fact that sub-nodes
describing frames would never have a size that's more than 32-bits
big.  That does indeed appear to be true for all cases I could find.

Currently many arm64 qcom device tree files have a #address-cells and
about in commit bede7d2d ("arm64: dts: qcom: sdm845: Increase
address and size cells for soc").  That means the only way we can
shrink them down is to use a non-empty ranges.

Since forever it has said in "writing-bindings.txt" to "DO use
non-empty 'ranges' to limit the size of child buses/devices".  I guess
we should start listening to it.

I believe (but am not certain) that this also means that we should use
"ranges" to simplify the "reg" of our sub devices by specifying an
offset.  Let's update the example in the bindings to make this
obvious.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Rob Herring <robh@kernel.org>

Typo fix, "withe" -> "with".
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Add Texas Instruments Dual channel DCAP+ multiphase controllers:
TPS53679, TPS53688, and Infineon Multi-phase Digital VR controllers
XDPE12284, XDPE12254 as trivial devices.
Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Rob Herring <robh@kernel.org>

This commit adds "super-speed-plus" to valid argument list of
"maximum-speed" property.
Signed-off-by: JC Kuo <jckuo@nvidia.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert Renesas R-Car MIPI CSI-2 receiver bindings documentation to
json-schema.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Rob Herring <robh@kernel.org>

This patch set the correct value for oversampling maxItems. In the
original example, appears 3 items for oversampling while the maxItems
is set to 1, this patch fixes those issues.

Fixes: 416f882c ("dt-bindings: iio: adc: Migrate AD7606 documentation to yaml")
Signed-off-by: Beniamin Bia <beniamin.bia@analog.com>
Signed-off-by: Rob Herring <robh@kernel.org>

This uses the new pata-common.yaml schema to
convert the Faraday FTIDE010 to DT schema.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>

I need to create subnodes for drives connected to PATA
host controllers, and this needs to be supported generally,
so create a common YAML binding for "ide" that will support
subnodes with ports.

This has been designed as a subset of
ata/ahci-platform.txt with the bare essentials and
should be possible to extend or superset to cover the
common bindings.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>

I need to create subnodes for drives connected to SATA
host controllers, and this needs to be supported
generally, so create a common YAML binding for
"sata" that will support subnodes with ports.

This has been designed as a subset of
ata/ahci-platform.txt with the bare essentials and
should be possible to extend or superset to cover the
common bindings.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[robh: fixup sata-port unit-address pattern]
Signed-off-by: Rob Herring <robh@kernel.org>

Kamstrup manufactures meters for electricity, heating, cooling
and water. Including long-life communication infrastructure
for e.g. smart grid based on Linux, more information on
https://www.kamstrup.comSigned-off-by: Bruno Thomsen <bruno.thomsen@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert DWC2 bindings to DT schema format using json-schema.
DWC2 is widely use but a couple of compatibles and properties
(vusb_d-supply,vusb_a-supply) were missing in dwc2.txt, the
patch add them.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Rob Herring <robh@kernel.org>

MPS produce power regulators like the MP8859.
Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Signed-off-by: Rob Herring <robh@kernel.org>

There used to be blank lines between assignment and check of the
__of_changeset_revert_entries() result, to make the phandle cache
management operations stand out.  After the removal of those operations
in commit 90dc0d1c ("of: Rework and simplify phandle cache to
use a fixed size"), there is no longer a reason to have such a blank
line.

Remove the blank line, to rejoin visibly the status assignement and
check, and to match coding style.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Rob Herring <robh@kernel.org>

There is a spelling mistake in:
      Documentation/bindings/leds/irled/spi-ir-led.txt.
Fix it.
Signed-off-by: Mohana Datta Yelugoti <ymdatta.work@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert the Arm idle-state binding to a DT schema.

Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Fix up inconsistent usage of upper and lowercase letters in "Exynos"
name.

"EXYNOS" is not an abbreviation but a regular trademarked name.
Therefore it should be written with lowercase letters starting with
capital letter.

The lowercase "Exynos" name is promoted by its manufacturer Samsung
Electronics Co., Ltd., in advertisement materials and on website.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>

"disable-wp" has been removed from all Rockchip eMMC and SDIO dts nodes,
but people still continue to submit new patches with "disable-wp" added
to other nodes then for the SD card slot,
what it was designed for in the first place.
So clarify the "disable-wp" text by adding that this option should
not be used in combination with eMMC or SDIO.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

There are two identical phrases in the disable-wp text,
so remove one of them.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

This adds the following commits from upstream:

c40aeb60b47a travis.yml: Run tests on the non-x86 builders, too
9f86aff444f4 Add .cirrus.yml for FreeBSD build
34c82275bae6 Avoid gnu_printf attribute when using Clang
743000931bc9 tests: default to 'cc' if CC not set
adcd676491cc Add test-case for trailing zero
d9c55f855b65 Remove trailing zero from the overlay path
7a22132c79ec pylibfdt: Adjust for deprecated test methods
dbe80d577ee2 tests: add extension to sed -i for GNU/BSD sed compatibility
af57d440d887 libfdt: Correct prototype for fdt_ro_probe_()
6ce585ac153b Use correct inttypes.h format specifier
715028622547 support byacc in addition to bison
fdf3f6d897ab pylibfdt: Correct the type for fdt_property_stub()
430419c28100 tests: fix some python warnings
588a29ff2e4e util: use gnu_printf format attribute
bc876708ab1d fstree: replace lstat with stat
4c3c4ccb9916 dumptrees: pass outputdir as first argument
aa522da9fff6 tests: allow out-of-tree test run
0d0d0fa51b1f fdtoverlay: Return non-zero exit code if overlays can't be applied
4605eb047b38 Add .editorconfig
18d7b2f4ee45 yamltree: Ensure consistent bracketing of properties with phandles
67f790c1adcc libfdt.h: add explicit cast from void* to uint8_t* in fdt(32|64)_st
b111122ea5eb pylibfdt: use python3 shebang
60e0db3d65a1 Ignore phandle properties in /aliases
95ce19c14064 README: update for Python 3
5345db19f615 livetree: simplify condition in get_node_by_path
b8d6eca78210 libfdt: Allow #size-cells of 0
184f51099471 Makefile: Add EXTRA_CFLAGS variable
812b1956a076 libfdt: Tweak data handling to satisfy Coverity
5c715a44776a fdtoverlay: Ignore symbols in overlays which don't apply to the target tree
b99353474850 fdtoverlay: Allow adding labels to __overlay__ nodes in overlays
d6de81b81b68 pylibfdt: Add support for fdt_get_alias()
1c17714dbb3a pylibfdt: Correct the FdtSw example
ad57e4574a37 tests: Add a failed test case for 'fdtoverlay' with long target path
bbe3b36f542b fdtoverlay: Rework output allocation
6c2e61f08396 fdtoverlay: Improve error messages
297f5abb362e fdtoverlay: Check for truncated overlay blobs

Cc: Frank Rowand <frowand.list@gmail.com>
Cc: clang-built-linux@googlegroups.com
Signed-off-by: Rob Herring <robh@kernel.org>

Convert the STM32 ROMEM binding to DT schema format using json-schema
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Rob Herring <robh@kernel.org>

dwc2 bindings require clock-names to be "otg".
Fix the example in amlogic,meson-g12a-usb-ctrl to follow this requirement.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Rob Herring <robh@kernel.org>

The Allwinner SoCs have a legacy set of bindings (and a framework to
support it in Linux) for their reset controllers.

Now that we have the DT validation in place, let's split into separate file
and convert the device tree bindings for those resets to schemas, and mark
them all as deprecated.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Rob Herring <robh@kernel.org>

The Allwinner SoCs have a legacy set of bindings (and a drivers to
support it in Linux) to support the PRCM unit found in most recent SoCs.

Now that we have the DT validation in place, let's split into separate file
and convert the device tree bindings for those controllers to schemas, and
mark them all as deprecated.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Rob Herring <robh@kernel.org>

The Allwinner SoCs have a legacy set of bindings (and a framework to
support it in Linux) for their clock controllers.

Now that we have the DT validation in place, let's split into separate file
and convert the device tree bindings for those clocks to schemas, and mark
them all as deprecated.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Rob Herring <robh@kernel.org>

The Allwinner H6 SoCs use binning in order to provide binning to
cpufreq which is supported in Linux, with a matching Device Tree binding.

Now that we have the DT validation in place, let's convert the device tree
bindings for that controller over to a YAML schemas.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Signed-off-by: Rob Herring <robh@kernel.org>

The phandle cache was added to speed up of_find_node_by_phandle() by
avoiding walking the whole DT to find a matching phandle. The
implementation has several shortcomings:

  - The cache is designed to work on a linear set of phandle values.
    This is true for dtc generated DTs, but not for other cases such as
    Power.
  - The cache isn't enabled until of_core_init() and a typical system
    may see hundreds of calls to of_find_node_by_phandle() before that
    point.
  - The cache is freed and re-allocated when the number of phandles
    changes.
  - It takes a raw spinlock around a memory allocation which breaks on
    RT.

Change the implementation to a fixed size and use hash_32() as the
cache index. This greatly simplifies the implementation. It avoids
the need for any re-alloc of the cache and taking a reference on nodes
in the cache. We only have a single source of removing cache entries
which is of_detach_node().

Using hash_32() removes any assumption on phandle values improving
the hit rate for non-linear phandle values. The effect on linear values
using hash_32() is about a 10% collision. The chances of thrashing on
colliding values seems to be low.

To compare performance, I used a RK3399 board which is a pretty typical
system. I found that just measuring boot time as done previously is
noisy and may be impacted by other things. Also bringing up secondary
cores causes some issues with measuring, so I booted with 'nr_cpus=1'.
With no caching, calls to of_find_node_by_phandle() take about 20124 us
for 1248 calls. There's an additional 288 calls before time keeping is
up. Using the average time per hit/miss with the cache, we can calculate
these calls to take 690 us (277 hit / 11 miss) with a 128 entry cache
and 13319 us with no cache or an uninitialized cache.

Comparing the 3 implementations the time spent in
of_find_node_by_phandle() is:

no cache:        20124 us (+ 13319 us)
128 entry cache:  5134 us (+ 690 us)
current cache:     819 us (+ 13319 us)

We could move the allocation of the cache earlier to improve the
current cache, but that just further complicates the situation as it
needs to be after slab is up, so we can't do it when unflattening (which
uses memblock).
Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Frank Rowand <frowand.list@gmail.com>
Tested-by: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Use the upstream compatible instead of the BSP one in the example
section of the DT bindings for this IP.

Fixes: 3817c796 ("dt-bindings: phy: add yaml binding for rockchip,px30-dsi-dphy")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert the Renesas CEU bindings description to yaml schema and remove
the existing textual bindings document.
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Rob Herring <robh@kernel.org>

Convert the STM32 watchdog binding to DT schema format using json-schema
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Signed-off-by: Rob Herring <robh@kernel.org>

Maxim MAX31730 is a 3-Channel Remote Temperature Sensor.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Rob Herring <robh@kernel.org>