linux-stable.git/drivers/of/address.c, branch linux-3.4.y

of/address: Don't loop forever in of_find_matching_node_by_address().

2016-04-27T10:55:16+00:00

commit 3a496b00b6f90c41bd21a410871dfc97d4f3c7ab upstream.

If the internal call to of_address_to_resource() fails, we end up
looping forever in of_find_matching_node_by_address().  This can be
caused by a defective device tree, or calling with an incorrect
matches argument.

Fix by calling of_find_matching_node() unconditionally at the end of
the loop.

Signed-off-by: David Daney 
Signed-off-by: Rob Herring 
Signed-off-by: Zefan Li

of/base: Fix PowerPC address parsing hack

2015-02-02T09:05:22+00:00

commit 746c9e9f92dde2789908e51a354ba90a1962a2eb upstream.

We have a historical hack that treats missing ranges properties as the
equivalent of an empty one. This is needed for ancient PowerMac "bad"
device-trees, and shouldn't be enabled for any other PowerPC platform,
otherwise we get some nasty layout of devices in sysfs or even
duplication when a set of otherwise identically named devices is
created multiple times under a different parent node with no ranges
property.

This fix is needed for the PowerNV i2c busses to be exposed properly
and will fix a number of other embedded cases.

Signed-off-by: Benjamin Herrenschmidt 
Acked-by: Grant Likely 
Signed-off-by: Rob Herring 
Signed-off-by: Zefan Li

of/address: Add reg-names property to name an iomem resource

2012-01-04T07:27:22+00:00

Add a reg-names property to allow for reg regions to be reference by name
instead of by index.  Some devices have multiple register regions which
are more naturally referenced by name.

If the name is available, use it to name the resource when creating a devices.
Otherwise keep the device name.

Signed-off-by: Benoit Cousson 
Cc: Grant Likely 
Cc: Rob Herring 
[Generalized documentation to be for any -names property]
Signed-off-by: Grant Likely

of: address: use resource_size helper

2011-08-01T11:55:02+00:00

that should be the approved way of calculating
the size of resources. No functional changes.

Cc: Grant Likely 
Signed-off-by: Felipe Balbi 
Signed-off-by: Grant Likely

of/address: Add of_find_matching_node_by_address helper

2011-07-18T22:32:26+00:00

of_find_matching_node_by_address() can be used to find a device tree
node for a device at a specific address.

Signed-off-by: Grant Likely

of/address: use proper endianess in get_flags

2010-12-23T22:57:48+00:00

This patch changes u32 to __be32 for all "ranges", "prop" and "addr" and
such. Those variables are pointing to the device tree which contains
integers in big endian format.

Most functions are doing it right because of_read_number() is doing the
right thing for them. of_bus_isa_get_flags(), of_bus_pci_get_flags() and
of_bus_isa_map() were accessing the data directly and were doing it wrong.

Signed-off-by: Sebastian Andrzej Siewior 
Acked-by: Benjamin Herrenschmidt 
Signed-off-by: Grant Likely

of: use __be32 types for big-endian device tree data

2010-10-13T03:58:42+00:00

Use the sparse annotations so we can keep track of endianness.

Signed-off-by: Jeremy Kerr 
Signed-off-by: Grant Likely

of: Use full node name in resource structures

2010-07-05T22:14:27+00:00

Resource names appear in human readable output, so when extracting IRQ
and address resources from a device tree node, use the full node name
to give proper context in places like /proc/iomem.

Signed-off-by: Grant Likely 
CC: Michal Simek 
CC: Stephen Rothwell 
CC: Benjamin Herrenschmidt 
CC: microblaze-uclinux@itee.uq.edu.au
CC: linuxppc-dev@ozlabs.org

of/address: restrict 'no-ranges' kludge to powerpc

2010-07-05T22:14:27+00:00

Certain Apple machines don't use the ranges property correctly, but the
workaround should not be applied on other architectures.  This patch
disables the workaround for non-powerpc architectures.

Signed-off-by: Grant Likely 
Acked-by: Benjamin Herrenschmidt 
CC: Stephen Rothwell

of/address: little-endian fixes

2010-07-05T22:14:27+00:00

Fix some endian issues in the OF address translation code.

Signed-off-by: Grant Likely 
Acked-by: Benjamin Herrenschmidt 
CC: Michal Simek 
CC: Stephen Rothwell