linux-toradex.git/arch/x86/include/asm/prom.h, branch v3.4.82

irq_domain/x86: Convert x86 (embedded) to use common irq_domain

2012-02-23T21:37:47+00:00

This patch removes the x86-specific definition of irq_domain and replaces
it with the common implementation.

Signed-off-by: Grant Likely 
Acked-by: Sebastian Andrzej Siewior 
Cc: Rob Herring 
Cc: Thomas Gleixner

atomic: use

2011-07-26T23:49:47+00:00

This allows us to move duplicated code in 
(atomic_inc_not_zero() for now) to 

Signed-off-by: Arun Sharma 
Reviewed-by: Eric Dumazet 
Cc: Ingo Molnar 
Cc: David Miller 
Cc: Eric Dumazet 
Acked-by: Mike Frysinger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pci/of: Consolidate pci_bus_to_OF_node()

2011-06-07T23:08:57+00:00

The generic code always get the device-node in the right place now
so a single implementation will work for all archs

Signed-off-by: Benjamin Herrenschmidt 
Acked-by: Grant Likely 
Acked-by: Michal Simek 
Acked-by: Jesse Barnes

pci/of: Consolidate pci_device_to_OF_node()

2011-06-07T23:08:43+00:00

All archs do more or less the same thing now, move it into
a single generic place.

I chose pci.h rather than of_pci.h to avoid having to change
all call-sites to include the later.

Signed-off-by: Benjamin Herrenschmidt 
Acked-by: Michal Simek 
Acked-by: Grant Likely 
Acked-by: Jesse Barnes

x86: dt: Cleanup local apic setup

2011-02-25T15:18:52+00:00

Up to now we force enable the local apic in the devicetree setup
uncoditionally and set smp_found_config unconditionally to 1 when a
devicetree blob is available. This breaks, when local apic is disabled
in the Kconfig.

Make it consistent by initializing device tree explicitely before
smp_get_config() so a non lapic configuration could be used as well.
To be functional that would require to implement PIT as an interrupt
host, but the only user of this code until now is ce4100 which
requires apics to be available. So we leave this up to those who need
it.

Tested-by: Sebastian Siewior 
Signed-off-by: Thomas Gleixner

x86: dt: Fix OLPC=y/INTEL_CE=n build

2011-02-24T12:01:59+00:00

Both OLPC and CE4100 activate CONFIG_OF. OLPC uses PROMTREE while CE
uses FLATTREE. Compiling for OLPC only breaks due to missing flat tree
functions and variables.

Use proper wrappers and provide an empty x86_flattree_get_config()
inline so OF=y FLATTREE=n builds and works.

[ tglx: Make it work with HPET_TIMER=n and make a function static ]

Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Thomas Gleixner

x86: ioapic: Add OF bindings for IO_APIC

2011-02-23T21:27:54+00:00

ioapic_xlate provides a translation from the information in device tree
to ioapic related informations. This includes
- obtaining hw irq which is the vector number "=> pin number + gsi"
- obtaining type (level/edge/..)
- programming this information into ioapic

ioapic_add_ofnode adds an irq_domain based on informations from the device
tree. This information (irq_domain) is required in order to map a device to
its proper interrupt controller.

[ tglx: Adapted to the io_apic changes, which let us move that whole code
  	to devicetree.c ]

Signed-off-by: Sebastian Andrzej Siewior 
Signed-off-by: Dirk Brandewie 
Acked-by: Grant Likely 
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-10-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner

x86: dtb: Add support for PCI devices backed by dtb nodes

2011-02-23T21:27:53+00:00

x86_of_pci_init() does two things:

- it provides a generic irq enable and disable function. enable queries
  the device tree for the interrupt information, calls ->xlate on the
  irq host and updates the pci->irq information for the device.

- it walks through PCI bus(es) in the device tree and adds its children
  (device) nodes to appropriate pci_dev nodes in kernel. So the dtb
  node information is available at probe time of the PCI device.

Adding a PCI bus based on the information in the device tree is
currently not supported. Right now direct access via ioports is used.

Signed-off-by: Sebastian Andrzej Siewior 
Tested-by: Dirk Brandewie 
Acked-by: Grant Likely 
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-8-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner

x86: dtb: Add early parsing of IO_APIC

2011-02-23T21:27:53+00:00

APIC and IO_APIC have to be added to the system early because
native_init_IRQ() requires it.

In order to obtain the address of the ioapic the device tree has to be
unflattened so of_address_to_resource() works.

The device tree is relocated to ensure it is always covered by the
kernel mapping. That way the boot loader does not have to make
any assumptions about kernel's memory layout.

Signed-off-by: Sebastian Andrzej Siewior 
Acked-by: Grant Likely 
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Dirk Brandewie 
LKML-Reference: <1298405266-1624-6-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner

x86: dtb: Add irq domain abstraction

2011-02-23T21:27:53+00:00

The here introduced irq_domain abstraction represents a generic irq
controller. It is a subset of powerpc's irq_host which is going to be
renamed to irq_domain and then become generic. This implementation will
be removed once it is generic.

The xlate callback is resposible to parse irq informations like irq type
and number and returns the hardware irq number which is reported by the
hardware as active.

Signed-off-by: Sebastian Andrzej Siewior 
Tested-by: Dirk Brandewie 
Acked-by: Grant Likely 
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-5-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner