linux-stable.git/drivers/of/address.c, branch linux-3.2.y

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

2015-10-13T02:46:06+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: Ben Hutchings

of/base: Fix PowerPC address parsing hack

2014-12-14T16:23:57+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 
[bwh: Backported to 3.2: use #ifdef because IS_ENABLED() only works for
 config symbols that are defined on the current architecture]
Signed-off-by: Ben Hutchings

of: fix PCI bus match for PCIe slots

2014-04-01T23:58:48+00:00

commit 14e2abb732e485ee57d9d5b2cb8884652238e5c1 upstream.

On IBM pseries systems the device_type device-tree property of a PCIe
bridge contains the string "pciex". The of_bus_pci_match() function was
looking only for "pci" on this property, so in such cases the bus
matching code was falling back to the default bus, causing problems on
functions that should be using "assigned-addresses" for region address
translation. This patch fixes the problem by also looking for "pciex" on
the PCI bus match function.

v2: added comment

Signed-off-by: Kleber Sacilotto de Souza 
Acked-by: Grant Likely 
Signed-off-by: Rob Herring 
Signed-off-by: Ben Hutchings

of: Fix address decoding on Bimini and js2x machines

2014-04-01T23:58:48+00:00

commit 6dd18e4684f3d188277bbbc27545248487472108 upstream.

 Commit:

  e38c0a1fbc5803cbacdaac0557c70ac8ca5152e7
  of/address: Handle #address-cells > 2 specially

broke real time clock access on Bimini, js2x, and similar powerpc
machines using the "maple" platform. That code was indirectly relying
on the old (broken) behaviour of the translation for the hypertransport
to ISA bridge.

This fixes it by treating hypertransport as a PCI bus

Signed-off-by: Benjamin Herrenschmidt 
Acked-by: Rob Herring 
Signed-off-by: Grant Likely 
Signed-off-by: Ben Hutchings

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