Commit Graph

82 Commits

Author SHA1 Message Date
Lubomir Rintel 83f82d7a42 of: irq: fix a trivial typo in a doc comment
Diverged from what the code does with commit 530210c781 ("of/irq: Replace
of_irq with of_phandle_args").

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Rob Herring <robh@kernel.org>
2019-08-14 20:12:16 -06:00
Geert Uytterhoeven 6f7dc9a37f of: irq: Remove WARN_ON() for kzalloc() failure
There is no need to print a backtrace if kzalloc() fails, as the memory
allocation core already takes care of that.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Rob Herring <robh@kernel.org>
2019-05-02 16:38:00 -05:00
Nipun Gupta 2a6db719c9 iommu/of: make of_pci_map_rid() available for other devices too
iommu-map property is also used by devices with fsl-mc. This
patch moves the of_pci_map_rid to generic location, so that it
can be used by other busses too.

'of_pci_map_rid' is renamed here to 'of_map_rid' and there is no
functional change done in the API.

Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2018-09-25 09:47:52 +02:00
Rob Herring af6074fc9a of: Use SPDX license tag for DT files
Convert remaining DT files to use SPDX-License-Identifier tags.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Reviewed-by: Frank Rowand <frank.rowand@sony.com>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2018-01-08 08:22:45 -06:00
Vasyl Gomonovych fae3b9cd70 of: irq: Fix function description comment
Make small cleanup in function description for
of_irq_parse_raw

Signed-off-by: Vasyl Gomonovych <gomonovych@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2017-12-12 12:03:06 -06:00
Linus Torvalds 74fee4e88f DeviceTree updates for 4.14:
- Convert more DT code to use of_property_read_* API.
 
 - Improve DT overlay support when adding multiple overlays.
 
 - Convert printk's to %pOF format specifiers. Most went via subsystem
   trees, but picked up the remaining orphans.
 
 - Correct unittests to use preferred "okay" for "status" property value.
 
 - Add a KASLR seed property.
 
 - Vendor prefixes for Mellanox, Theobroma System, Adaptrum, Moxa.
 
 - Fix modalias buffer handling.
 
 - Clean-up of include paths for building dtbs.
 
 - Add bindings for amc6821, isl1208, tsl2x7x, srf02, and srf10 devices.
 
 - Add nvmem bindings for MediaTek MT7623 and MT7622 SoC.
 
 - Add compatible string for Allwinner H5 Mali-450 GPU.
 
 - Fix links to old OpenFirmware docs with new mirror on devicetree.org.
 
 - Remove status property from binding doc examples.
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Merge tag 'devicetree-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:
 "There's a few orphans in the conversion to %pOF printf specifiers
  included here that no one else picked up.

  Summary:

   - Convert more DT code to use of_property_read_* API.

   - Improve DT overlay support when adding multiple overlays

   - Convert printk's to %pOF format specifiers. Most went via subsystem
     trees, but picked up the remaining orphans

   - Correct unittests to use preferred "okay" for "status" property
     value

   - Add a KASLR seed property

   - Vendor prefixes for Mellanox, Theobroma System, Adaptrum, Moxa

   - Fix modalias buffer handling

   - Clean-up of include paths for building dtbs

   - Add bindings for amc6821, isl1208, tsl2x7x, srf02, and srf10
     devices

   - Add nvmem bindings for MediaTek MT7623 and MT7622 SoC

   - Add compatible string for Allwinner H5 Mali-450 GPU

   - Fix links to old OpenFirmware docs with new mirror on
     devicetree.org

   - Remove status property from binding doc examples"

* tag 'devicetree-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (45 commits)
  devicetree: Adjust status "ok" -> "okay" under drivers/of/
  dt-bindings: Remove "status" from examples
  dt-bindings: pinctrl: sh-pfc: Use generic node name
  dt-bindings: Add vendor Mellanox
  dt-binding: net/phy: fix interrupts description
  virt: Convert to using %pOF instead of full_name
  macintosh: Convert to using %pOF instead of full_name
  ide: pmac: Convert to using %pOF instead of full_name
  microblaze: Convert to using %pOF instead of full_name
  dt-bindings: usb: musb: Grammar s/the/to/, s/is/are/
  of: Use PLATFORM_DEVID_NONE definition
  of/device: Fix of_device_get_modalias() buffer handling
  of/device: Prevent buffer overflow in of_device_modalias()
  dt-bindings: add amc6821, isl1208 trivial bindings
  dt-bindings: add vendor prefix for Theobroma Systems
  of: search scripts/dtc/include-prefixes path for both CPP and DTC
  of: remove arch/$(SRCARCH)/boot/dts from include search path for CPP
  of: remove drivers/of/testcase-data from include search path for CPP
  of: return of_get_cpu_node from of_cpu_device_node_get if CPUs are not registered
  iio: srf08: add device tree binding for srf02 and srf10
  ...
2017-09-07 14:43:33 -07:00
Rob Herring b47fe22d82 of/irq: use of_property_read_u32_index to parse interrupts property
Convert the interrupts property parsing to use the OF property API
instead of open coding the parsing of the raw property value. This saves
a number of LoC, and the result is easier to read.

Signed-off-by: Rob Herring <robh@kernel.org>
2017-08-01 12:24:06 -05:00
Sergei Shtylyov 531da74075 of: irq: fix of_irq_to_resource() error check
of_irq_to_resource() has recently been fixed to return negative error #'s
along with 0, however of_irq_to_resource_table() still only regards 0 as
invalid IRQ -- fix it up.

Fixes: 7a4228bbff ("of: irq: use of_irq_get() in of_irq_to_resource()")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2017-07-21 16:58:55 -05:00
Sergei Shtylyov fa976ff7b0 of: irq: use of_property_read_u32()
The DT interrupt parsing code predates of_property_read_u32(), so it has to
basically open-code it. Using the modern DT API saves several LoCs and also
adds some prop sanity checks as a bonus...

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2017-07-21 09:59:36 -05:00
Sergei Shtylyov 6a245d959c of: irq: use of_property_read_bool() for "interrupt-controller" prop
The "interrupt-controller" property is boolean, i.e. has no value.  The DT
interrupt parsing code predates of_property_read_bool(), so it uses either
of_get_property() or of_find_property() -- the former isn't quite correct
for the boolean props (but works somehow). Use the modern boolean prop API
instead.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2017-07-21 09:59:33 -05:00
Rob Herring 0d638a07d3 of: Convert to using %pOF instead of full_name
Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring <robh@kernel.org>
2017-07-18 17:09:18 -05:00
Thomas Petazzoni 7a4228bbff of: irq: use of_irq_get() in of_irq_to_resource()
of_irq_to_resource() currently uses irq_of_parse_and_map() to
translate a DT interrupt specification into a Linux virtual interrupt
number. While this works in most cases, irq_of_parse_and_map() doesn't
properly handle the case where the interrupt controller is not yet
available (due to deferred probing for example).

So instead, use of_irq_get(), which is implemented exactly like
irq_of_parse_and_map(), with the exception that if the interrupt
controller is not yet available, it returns -EPROBE_DEFER. Obviously,
we also handle this error and bail out from of_irq_to_resource() when
of_irq_get() returns an error.

This allows to avoid silly error messages at boot time caused by
irq_create_of_mapping() when the interrupt controller is not
available:

[    0.153168] irq: no irq domain found for /ap806/config-space@f0000000/interrupt-controller@3f0100 !
[    0.154041] irq: no irq domain found for /cp110-master/config-space@f2000000/interrupt-controller@1e0000 !
[    0.154124] irq: no irq domain found for /cp110-master/config-space@f2000000/interrupt-controller@1e0000 !
[    0.154207] irq: no irq domain found for /cp110-master/config-space@f2000000/interrupt-controller@1e0000 !
[    0.154437] irq: no irq domain found for /cp110-master/config-space@f2000000/interrupt-controller@1e0000 !
[    0.154518] irq: no irq domain found for /cp110-master/config-space@f2000000/interrupt-controller@1e0000 !

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2017-05-16 09:11:22 -05:00
Rob Herring 17a70355ea of: fix sparse warnings in fdt, irq, reserved mem, and resolver code
sparse generates the following warnings in drivers/of/:

../drivers/of/fdt.c:63:36: warning: cast to restricted __be32
../drivers/of/fdt.c:68:33: warning: cast to restricted __be32
../drivers/of/irq.c:105:88: warning: incorrect type in initializer (different base types)
../drivers/of/irq.c:105:88:    expected restricted __be32
../drivers/of/irq.c:105:88:    got int
../drivers/of/irq.c:526:35: warning: incorrect type in assignment (different modifiers)
../drivers/of/irq.c:526:35:    expected int ( *const [usertype] irq_init_cb )( ... )
../drivers/of/irq.c:526:35:    got void const *const data
../drivers/of/of_reserved_mem.c:200:50: warning: incorrect type in initializer (different modifiers)
../drivers/of/of_reserved_mem.c:200:50:    expected int ( *[usertype] initfn )( ... )
../drivers/of/of_reserved_mem.c:200:50:    got void const *const data
../drivers/of/resolver.c:95:42: warning: incorrect type in assignment (different base types)
../drivers/of/resolver.c:95:42:    expected unsigned int [unsigned] [usertype] <noident>
../drivers/of/resolver.c:95:42:    got restricted __be32 [usertype] <noident>

All these are harmless type mismatches fixed by adjusting the types.

Signed-off-by: Rob Herring <robh@kernel.org>
2017-05-04 14:01:13 -05:00
Guilherme G. Piccoli f1aa548406 of/irq: improve error report on irq discovery process failure
On PowerPC machines some PCI slots might not have level triggered
interrupts capability (also know as level signaled interrupts),
leading of_irq_parse_pci() to complain by presenting error messages
on the kernel log - in this case, the properties "interrupt-map" and
"interrupt-map-mask" are not present on device's node in the device
tree.

This patch introduces a different message for this specific case,
and also reduces its level from error to warning. Besides, we warn
(once) that possibly some PCI slots on the system have no level
triggered interrupts available.
We changed some error return codes too on function of_irq_parse_raw()
in order other failure's cases can be presented in a more precise way.

Before this patch, when an adapter was plugged in a slot without level
interrupts capabilitiy on PowerPC, we saw a generic error message
like this:

    [54.239] pci 002d:70:00.0: of_irq_parse_pci() failed with rc=-22

Now, with this applied, we see the following specific message:

    [16.154] pci 0014:60:00.1: of_irq_parse_pci: no interrupt-map found,
    INTx interrupts not available

Finally, we standardize the error path in of_irq_parse_raw() by always
taking the fail path instead of returning directly from the loop.

Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2017-01-09 09:52:17 -06:00
Sinan Kaya 5282c18166 of: irq: make of_msi_configure accessible from modules
The of_msi_configure routine is only accessible by the built-in
kernel drivers. Export this function so that modules can use it
too.

This function is useful for configuring MSI on child device tree
nodes on hierarchical objects.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2016-10-19 19:02:58 +05:30
Robin Murphy 987068fcbd of/irq: Break out msi-map lookup (again)
The PCI msi-map code is already doing double-duty translating IDs and
retrieving MSI parents, which unsurprisingly is the same functionality
we need for the identically-formatted PCI iommu-map property. Drag the
core parsing routine up yet another layer into the general OF-PCI code,
and further generalise it for either kind of lookup in either flavour
of map property.

Acked-by: Rob Herring <robh+dt@kernel.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-09-16 09:34:14 +01:00
Philipp Zabel e55aeb6ba4 of/irq: Mark interrupt controllers as populated before initialisation
That way the init callback may clear the flag again, in case of drivers
split between early irq chip and a normal platform driver.

Fixes: 15cc2ed6dc ("of/irq: Mark initialised interrupt controllers as populated")
Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2016-08-09 12:36:28 -05:00
Rob Herring 606ad42aa3 of: use pr_fmt prefix for all console printing
Clean-up all the DT printk functions to use common pr_fmt prefix.

Some print statements such as kmalloc errors were redundant, so just
drop those.

Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Reviewed-by: Frank Rowand <frank.rowand@am.sony.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2016-07-18 16:57:42 -05:00
Jon Hunter 15cc2ed6dc of/irq: Mark initialised interrupt controllers as populated
For interrupt controllers successfully initialised early via device-tree,
mark these interrupt controllers as populated so we don't unnecessarily
create a device and populate any platform data later on in the boot
sequence when we populate all the various platform devices.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2016-06-24 15:17:02 -05:00
Sergei Shtylyov 3993546646 of: irq: fix of_irq_get[_byname]() kernel-doc
The kernel-doc for the of_irq_get[_byname]()  is clearly inadequate in
describing the return values -- of_irq_get_byname() is documented better
than of_irq_get() but it  still doesn't mention that 0 is returned iff
irq_create_of_mapping() fails (it doesn't return an error code in this
case). Document all possible return value variants, making the writing
of the word "IRQ" consistent, while at it...

Fixes: 9ec36cafe4 ("of/irq: do irq resolution in platform_get_irq")
Fixes: ad69674e73 ("of/irq: do irq resolution in platform_get_irq_byname()")
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
CC: stable@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
2016-06-03 07:22:01 -05:00
Robin Murphy 5d589d81ac of/irq: Fix msi-map calculation for nonzero rid-base
The existing msi-map code is fine for shifting the entire RID space
upwards, but attempting finer-grained remapping reveals a bug. It turns
out that we are mistakenly treating the msi-base part as an offset, not
as a new base to remap onto, so things get squiffy when rid-base is
nonzero. Fix this, and at the same time add a sanity check against
having msi-map-mask clash with a nonzero rid-base, as that's another
thing one can easily get wrong.

CC: <stable@vger.kernel.org>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Tested-by: Stuart Yoder <stuart.yoder@nxp.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: David Daney <david.daney@cavium.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2016-02-11 16:51:41 -06:00
Linus Torvalds 30e4c9ad04 Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull IRQ fixes from Ingo Molnar:
 "Mostly irqchip driver fixes, but also an irq core crash fix and a
  build fix"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/mxs: Add missing set_handle_irq()
  irqchip/atmel-aic: Fix wrong bit operation for IRQ priority
  irqchip/gic-v3-its: Recompute the number of pages on page size change
  base: Export platform_msi_domain_[alloc,free]_irqs
  of: MSI: Simplify irqdomain lookup
  irqdomain: Allow domain lookup with DOMAIN_BUS_WIRED token
  irqchip: Fix dependencies for archs w/o HAS_IOMEM
  irqchip/s3c24xx: Mark init_eint as __maybe_unused
  genirq: Validate action before dereferencing it in handle_irq_event_percpu()
2016-01-31 14:48:58 -08:00
Marc Zyngier 14a0db3cdd of: MSI: Simplify irqdomain lookup
So far, when trying to associate a device with its MSI domain,
we first lookup the domain using a MSI token, and if this
doesn't return anything useful, we pick up any domain matching
the same node.

This logic is broken for two reasons:
1) Only the generic MSI code (PCI or platform) sets this token
   to PCI/MSI or platform MSI. So we're guaranteed that if there
   is something to be found, we will find it with the first call.
2) If we have a convoluted situation where:
   - a single node implements both wired and MSI interrupts
   - MSI support for that HW hasn't been compiled in
   we'll end up using the wired domain for MSIs anyway, and things
   break badly.

So let's just remove __of_get_msi_domain, and replace it by a direct
call to irq_find_matching_host, because that's what we really want.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Rob Herring <robh+dt@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Link: http://lkml.kernel.org/r/1453816347-32720-3-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2016-01-26 16:00:15 +01:00
Linus Torvalds 5339f9d4c2 DeviceTree updates for 4.5:
- Rework and export the changeset API to make it available to users
 other than DT overlays
 
 - ARM secure devices binding
 
 - OCTEON USB binding
 
 - Clean-up of various SRAM binding docs
 
 - Various other binding doc updates
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Merge tag 'devicetree-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:

 - Rework and export the changeset API to make it available to users
   other than DT overlays

 - ARM secure devices binding

 - OCTEON USB binding

 - Clean-up of various SRAM binding docs

 - Various other binding doc updates

* tag 'devicetree-for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (21 commits)
  drivers/of: Export OF changeset functions
  Fix documentation for adp1653 DT
  ARM: psci: Fix indentation in DT bindings
  of/platform: export of_default_bus_match_table
  of/unittest: Show broken behaviour in the platform bus
  of: fix declaration of of_io_request_and_map
  of/address: replace printk(KERN_ERR ...) with pr_err(...)
  of/irq: optimize device node matching loop in of_irq_init()
  dt-bindings: tda998x: Document the required 'port' node.
  net/macb: bindings doc: Merge cdns-emac to macb
  dt-bindings: Misc fix for the ATH79 DDR controllers
  dt-bindings: Misc fix for the ATH79 MISC interrupt controllers
  Documentation: dt: Add bindings for Secure-only devices
  dt-bindings: ARM: add arm,cortex-a72 compatible string
  ASoC: Atmel: ClassD: add GCK's parent clock in DT binding
  DT: add Olimex to vendor prefixes
  Documentation: fsl-quadspi: Add fsl,ls1021-qspi compatible string
  Documentation/devicetree: document OCTEON USB bindings
  usb: misc: usb3503: Describe better how to bind clock to the hub
  dt-bindings: Consolidate SRAM bindings from all vendors
  ...
2016-01-14 11:13:28 -08:00
Masahiro Yamada 264041e379 of/irq: optimize device node matching loop in of_irq_init()
Currently, of_irq_init() iterates over interrupt controller nodes
with for_each_matching_node(), and then gets each init function with
of_match_node() later.

This routine can be optimized with for_each_matching_node_and_match().
It allows to get the interrupt controller node and its init function
at the same time, saving __of_match_node() callings.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2015-12-09 15:30:57 -06:00
Carlo Caione 4c3141e09c of/irq: Export of_irq_find_parent again
of_irq_find_parent was made static since it had no users outside of
of_irq.c. Export it again since we are going to use it again.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
[robh: move of_irq_find_parent to correct ifdef section]
Signed-off-by: Rob Herring <robh@kernel.org>
2015-12-09 09:08:36 -06:00
Linus Torvalds 9bbd4b9f38 DeviceTree updates for 4.4:
- DT binding doc consolidation moving similar bindings to common
   locations. The majority of these are display related which were
   scattered in video/, fb/, drm/, gpu/, and panel/ directories.
 - Add new config option, CONFIG_OF_ALL_DTBS, to enable building all dtbs
   in the tree for most arches with dts files (except powerpc for now).
 - OF_IRQ=n fixes for user enabled CONFIG_OF.
 - of_node_put ref counting fixes from Julia Lawall.
 - Common DT binding for wakeup-source and deprecation of all similar
   bindings.
 - DT binding for PXA LCD controller.
 - Allow ignoring failed PCI resource translations in order to ignore
   64-bit addresses on non-LPAE 32-bit kernels.
 - Support setting the NUMA node from DT instead of only from parent
   device.
 - Couple of earlycon DT parsing fixes for address and options.
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Merge tag 'devicetree-for-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:
 "A fairly large (by DT standards) pull request this time with the
  majority being some overdue moving DT binding docs around to
  consolidate similar bindings.

   - DT binding doc consolidation moving similar bindings to common
     locations.  The majority of these are display related which were
     scattered in video/, fb/, drm/, gpu/, and panel/ directories.

   - Add new config option, CONFIG_OF_ALL_DTBS, to enable building all
     dtbs in the tree for most arches with dts files (except powerpc for
     now).

   - OF_IRQ=n fixes for user enabled CONFIG_OF.

   - of_node_put ref counting fixes from Julia Lawall.

   - Common DT binding for wakeup-source and deprecation of all similar
     bindings.

   - DT binding for PXA LCD controller.

   - Allow ignoring failed PCI resource translations in order to ignore
     64-bit addresses on non-LPAE 32-bit kernels.

   - Support setting the NUMA node from DT instead of only from parent
     device.

   - Couple of earlycon DT parsing fixes for address and options"

* tag 'devicetree-for-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (45 commits)
  MAINTAINERS: update DT binding doc locations
  devicetree: add Sigma Designs vendor prefix
  of: simplify arch_find_n_match_cpu_physical_id() function
  Documentation: arm: Fixed typo in socfpga fpga mgr example
  Documentation: devicetree: fix reference to legacy wakeup properties
  Documentation: devicetree: standardize/consolidate on "wakeup-source" property
  drivers: of: removing assignment of 0 to static variable
  xtensa: enable building of all dtbs
  mips: enable building of all dtbs
  metag: enable building of all dtbs
  metag: use common make variables for dtb builds
  h8300: enable building of all dtbs
  arm64: enable building of all dtbs
  arm: enable building of all dtbs
  arc: enable building of all dtbs
  arc: use common make variables for dtb builds
  of: add config option to enable building of all dtbs
  of/fdt: fix error checking for earlycon address
  of/overlay: add missing of_node_put
  of/platform: add missing of_node_put
  ...
2015-11-06 12:17:09 -08:00
Julia Lawall 8363ccb917 of/irq: add missing of_node_put
for_each_matching_node performs an of_node_get on each iteration, so
a break out of the loop requires an of_node_put.

A simplified version of the semantic patch that fixes this problem is as
follows (http://coccinelle.lip6.fr):

// <smpl>
@@
local idexpression n;
expression e;
identifier l;
@@

 for_each_matching_node(n,...) {
   ...
(
   of_node_put(n);
|
   e = n
|
+  of_node_put(n);
?  goto l;
)
   ...
 }
...
l: ... when != n
// </smpl>

Besides the issue found by the semantic patch, this code also stores the
device_node value in a list, which requires an of_node_get, and then cleans
up the list on exit from the function, which requires an of_node_put.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Rob Herring <robh@kernel.org>
2015-10-22 09:26:32 -05:00
Marc Zyngier 82b9b4243c of/irq: Use the msi-map property to provide device-specific MSI domain
While msi-parent is used to point to the MSI controller that
works for all the devices behind a root complex, it doesn't
allow configurations where each individual device can be routed
to a separate MSI controller.

The msi-map property provides this flexibility (and much more),
so let's add a utility function that parses it, and return the
corresponding MSI domain.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-16 13:07:15 +01:00
Marc Zyngier a251b26334 of/irq: Split of_msi_map_rid to reuse msi-map lookup
The msi-map property is also used to identify the MSI controller
as a form of grown-up msi-parent property.

Looking it up is complicated enough, and since of_msi_map_rid
already implements this, let's turn it into an internal utility
function. We'll put that to good use later on.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-16 13:07:15 +01:00
Marc Zyngier 61c08240a1 of/irq: Use of_msi_get_domain instead of open-coded "msi-parent" parsing
Now that we have a function that implements the complexity of the
"msi-parent" property parsing, switch to that.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-16 13:07:13 +01:00
Marc Zyngier 48ae34fb39 of/irq: Add support code for multi-parent version of "msi-parent"
Since 126b16e2ad ("Docs: dt: add generic MSI bindings"),
the definition of "msi-parent" has evolved, while maintaining
some degree of compatibility. It can now express multiple MSI
controllers as parents, as well as some sideband data being
communicated to the controller.

This patch adds the parsing of the property, iterating over
the multiple parents until a suitable irqdomain is found.
It can also fallback to the original parsing if the old
binding is detected.

This support code gets used in the subsequent patches.

Suggested-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-16 13:07:13 +01:00
David Daney 8db02d8b40 of/irq: Add new function of_msi_map_rid()
The device tree property "msi-map" specifies how to create the PCI
requester id used in some MSI controllers.  Add a new function
of_msi_map_rid() that finds the msi-map property and applies its
translation to a given requester id.

Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-10-16 11:45:27 +01:00
Jonas Gorski 52493d4461 of/irq: make of_irq_find_parent static
of_irq_find_parent has no users outside of of_irq.c, so it does not make
sense to expose it in of_irq.h. Therefore remove the prototype and dummy
implmeentation and make the function static instead.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Rob Herring <robh@kernel.org>
2015-10-13 13:34:32 -05:00
Linus Torvalds acceba598e Merge branch 'i2c/for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang:
 "Features:

   - new drivers: Renesas EMEV2, register based MUX, NXP LPC2xxx
   - core: scans DT and assigns wakeup interrupts.  no driver changes needed.
   - core: some refcouting issues fixed and better API for that
   - core: new helper function for best effort block read emulation
   - slave framework: proper DT bindings and userspace instantiation
   - some bigger work for xiic, pxa, omap drivers

  .. and quite a number of smaller driver fixes, cleanups, improvements"

* 'i2c/for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (65 commits)
  i2c: mux: reg Change ioread endianness for readback
  i2c: mux: reg: fix compilation warnings
  i2c: mux: reg: simplify register size checking
  i2c: muxes: fix leaked i2c adapter device node references
  i2c: allow specifying separate wakeup interrupt in device tree
  of/irq: export of_get_irq_byname()
  i2c: xgene-slimpro: dma_mapping_error() doesn't return an error code
  i2c: Replace I2C_CROS_EC_TUNNEL dependency
  eeprom: at24: use i2c_smbus_read_i2c_block_data_or_emulated
  i2c: core: Add support for best effort block read emulation
  i2c: lpc2k: add driver
  i2c: mux: Add register-based mux i2c-mux-reg
  i2c: dt: describe generic bindings
  i2c: slave: print warning if slave flag not set
  i2c: support 10 bit and slave addresses in sysfs 'new_device'
  i2c: take address space into account when checking for used addresses
  i2c: apply DT flags when probing
  i2c: make address check indpendent from client struct
  i2c: rename address check functions
  i2c: apply address offset for slaves, too
  ...
2015-09-08 16:16:26 -07:00
Dmitry Torokhov 6602c452ca of/irq: export of_get_irq_byname()
Similarly to of_get_irq(), let's export of_irq_get_byname(), so if a bus core
can be compiled as a module (such as I2C) it can have access to the symbol.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2015-08-26 18:47:57 +02:00
Marc Zyngier c706c239af of/platform: Assign MSI domain to platform device
As for PCI, we're able to populate the msi_domain field at probe time,
provided that the device tree has an "msi-parent" property.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Ma Jun <majun258@huawei.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Duc Dang <dhdang@apm.com>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1438091186-10244-9-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-30 00:14:37 +02:00
Geert Uytterhoeven 48a9b733e6 of/irq: Rename "intc_desc" to "of_intc_desc" to fix OF on sh
Now CONFIG_OF can be enabled on sh:

    drivers/of/irq.c:472:8: error: redefinition of 'struct intc_desc'
    include/linux/sh_intc.h:109:8: note: originally defined here

As "intc_desc" is used all over the place in sh platform code, while
drivers/of/irq.c has a local definition used in a single function,
rename the latter by prefixing it with "of_".

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2015-06-30 17:03:57 +01:00
Jeremy Linton d23b251669 of/irq: Fix pSeries boot failure
of_irq_parse_raw() needs to return the correct interrupt controller
node when an interrupt-map property doesn't exist.

It allows of_irq_parse_raw() to return the node pointer of the interrupt
controller, rather than the parent bus. This allows ics_rtas_host_match()
to detect that the controller is a legacy 8259 and avoid using xics.
This avoids an RTAS assertion/crash during early kernel bootstrapping.

Signed-off-by: Jeremy Linton <lintonrjeremy@gmail.com>
Reviewed-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2015-06-30 16:55:30 +01:00
Laurent Pinchart d7c146053d of/irq: Fix of_irq_parse_one() returned error codes
The error code paths that require cleanup use a goto to jump to the
cleanup code and return an error code. However, the error code variable
res, which is initialized to -EINVAL when declared, is then overwritten
with the return value of of_parse_phandle_with_args(), and reused as the
return code from of_irq_parse_one(). This leads to an undetermined error
being returned instead of the expected -EINVAL value. Fix it.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: stable@vger.kernel.org # 3.13+
Signed-off-by: Rob Herring <robh@kernel.org>
2015-03-19 08:39:14 -05:00
Laurent Pinchart 9eb08fb3d1 of/irq: Export of_irq_get()
The function will be used by the I2C core which can be compiled as a
module.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-11-10 09:34:57 +01:00
Florian Fainelli a9ecdc0fdc of/irq: Fix lookup to use 'interrupts-extended' property first
In case the Device Tree blob passed by the boot agent supplies both an
'interrupts-extended' and an 'interrupts' property in order to allow for
older kernels to be usable, prefer the new-style 'interrupts-extended'
property which conveys a lot more information.

This allows us to have bootloaders willingly maintaining backwards
compatibility with older kernels without entirely deprecating the
'interrupts' property.

Update the bindings documentation to describe a situation where both the
'interrupts-extended' and the 'interrupts' property are present, and
which one takes precedence over the other.

Cc: stable@vger.kernel.org # 3.13+
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-08-16 09:03:58 +01:00
Grygorii Strashko ad69674e73 of/irq: do irq resolution in platform_get_irq_byname()
The commit 9ec36cafe4
"of/irq: do irq resolution in platform_get_irq" from Rob Herring -
moves resolving of the interrupt resources in platform_get_irq().
But this solution isn't complete because platform_get_irq_byname()
need to be modified the same way.

Hence, fix it by adding interrupt resolution code at the
platform_get_irq_byname() function too.

Cc: Russell King <linux@arm.linux.org.uk>
Cc: Rob Herring <robh@kernel.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Thierry Reding <thierry.reding@gmail.com>

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-05-23 11:40:25 +09:00
Rob Herring 9ec36cafe4 of/irq: do irq resolution in platform_get_irq
Currently we get the following kind of errors if we try to use interrupt
phandles to irqchips that have not yet initialized:

irq: no irq domain found for /ocp/pinmux@48002030 !
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at drivers/of/platform.c:171 of_device_alloc+0x144/0x184()
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.12.0-00038-g42a9708 #1012
(show_stack+0x14/0x1c)
(dump_stack+0x6c/0xa0)
(warn_slowpath_common+0x64/0x84)
(warn_slowpath_null+0x1c/0x24)
(of_device_alloc+0x144/0x184)
(of_platform_device_create_pdata+0x44/0x9c)
(of_platform_bus_create+0xd0/0x170)
(of_platform_bus_create+0x12c/0x170)
(of_platform_populate+0x60/0x98)

This is because we're wrongly trying to populate resources that are not
yet available. It's perfectly valid to create irqchips dynamically, so
let's fix up the issue by resolving the interrupt resources when
platform_get_irq is called.

And then we also need to accept the fact that some irqdomains do not
exist that early on, and only get initialized later on. So we can
make the current WARN_ON into just into a pr_debug().

We still attempt to populate irq resources when we create the devices.
This allows current drivers which don't use platform_get_irq to continue
to function. Once all drivers are fixed, this code can be removed.

Suggested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Cc: stable@vger.kernel.org # v3.10+
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-04-24 21:40:22 +01:00
Geert Uytterhoeven ae107d0613 dt: Fix binding typos in clock-names and interrupt-names
s/interrupts-names/interrupt-names/g
s/clocks-names/clock-names/g

Some of the binding files and device tree files get this wrong and the
kernel won't be able to pick it up. Fix them up now so that they don't
get widely used.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by : Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-04-23 13:03:57 +01:00
Rob Herring 361128fcbf Merge remote-tracking branch 'grant/devicetree/next' into for-3.14 2014-01-17 16:01:27 -06:00
Cédric Le Goater 2f53a713c4 of/irq: Fix device_node refcount in of_irq_parse_raw()
Commit 2361613206, "of/irq: Refactor interrupt-map parsing" changed
the refcount on the device_node causing an error in of_node_put():

ERROR: Bad of_node_put() on /pci@800000020000000
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.13.0-rc3-dirty #2
Call Trace:
[c00000003e403500] [c0000000000144fc] .show_stack+0x7c/0x1f0 (unreliable)
[c00000003e4035d0] [c00000000070f250] .dump_stack+0x88/0xb4
[c00000003e403650] [c0000000005e8768] .of_node_release+0xd8/0xf0
[c00000003e4036e0] [c0000000005eeafc] .of_irq_parse_one+0x10c/0x280
[c00000003e4037a0] [c0000000005efd4c] .of_irq_parse_pci+0x3c/0x1d0
[c00000003e403840] [c000000000038240] .pcibios_setup_device+0xa0/0x2e0
[c00000003e403910] [c0000000000398f0] .pcibios_setup_bus_devices+0x60/0xd0
[c00000003e403990] [c00000000003b3a4] .__of_scan_bus+0x1a4/0x2b0
[c00000003e403a80] [c00000000003a62c] .pcibios_scan_phb+0x30c/0x410
[c00000003e403b60] [c0000000009fe430] .pcibios_init+0x7c/0xd4

This patch adjusts the refcount in the walk of the interrupt tree.
When a match is found, there is no need to increase the refcount
on 'out_irq->np' as 'newpar' is already holding a ref. The refcount
balance between 'ipar' and 'newpar' is maintained in the skiplevel:
goto label.

This patch also removes the usage of the device_node variable 'old'
which seems useless after the latest changes.

Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2013-12-30 10:23:27 -06:00
Peter Crosthwaite 1ca56e7dca of: irq: Ignore disabled intc's when searching map
When searching the interrupt map, if a matched parent is disabled, just
ignore it and move on with the search.

This allows for specifying connection of a single device IRQ to
multiple interrupt controllers via the interrupt map schema. This change
allows for selection of the active interrupt controller via the already
existing status = "disabled" mechanism.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2013-12-04 13:12:50 -06:00
Peter Crosthwaite bf49be02d6 of: irq: Ignore disabled interrupt controllers
When searching the system for interrupt controllers, skip over any
that are explicitly disabled.

This makes interrupt controllers consistent with regular devices,
which can be marked as do-not-probe via the status = "disabled" dts
property.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2013-12-04 13:12:49 -06:00
Tomasz Figa 74dac2ed69 of: irq: Fix interrupt-map entry matching
This patch fixes interrupt-map entry matching code to properly match all
specifier cells with interrupt map entries.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Tested-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
2013-11-07 10:37:59 -06:00