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authorKevin Cernekee <cernekee@gmail.com>2015-04-09 23:05:15 +0300
committerRob Herring <robh@kernel.org>2015-04-15 03:35:44 +0300
commitcc7837867a559feba70fdf68eb53c24a84e3712f (patch)
tree109ba477dbe16219c56245b46e0908d78aa4a583 /drivers/of
parent37786c7fee40771d13901de129af7e084ed48b55 (diff)
downloadlinux-cc7837867a559feba70fdf68eb53c24a84e3712f.tar.xz
of/fdt: Add endianness helper function for early init code
Provide a libfdt-based equivalent for of_device_is_big_endian(), suitable for use in the early_init_* functions. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/fdt.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 34bdc4de83d0..4b15aa163b6e 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -109,6 +109,25 @@ int of_fdt_is_compatible(const void *blob,
}
/**
+ * of_fdt_is_big_endian - Return true if given node needs BE MMIO accesses
+ * @blob: A device tree blob
+ * @node: node to test
+ *
+ * Returns true if the node has a "big-endian" property, or if the kernel
+ * was compiled for BE *and* the node has a "native-endian" property.
+ * Returns false otherwise.
+ */
+bool of_fdt_is_big_endian(const void *blob, unsigned long node)
+{
+ if (fdt_getprop(blob, node, "big-endian", NULL))
+ return true;
+ if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN) &&
+ fdt_getprop(blob, node, "native-endian", NULL))
+ return true;
+ return false;
+}
+
+/**
* of_fdt_match - Return true if node matches a list of compatible values
*/
int of_fdt_match(const void *blob, unsigned long node,