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| author | Chen Baozi <baozich@gmail.com> | 2013-08-13 19:14:23 +0800 |
|---|---|---|
| committer | Ian Campbell <ian.campbell@citrix.com> | 2013-08-22 13:17:29 +0100 |
| commit | 282a1c2aba06d1860ed91e4df8dd4c42f1a822e6 (patch) | |
| tree | 5be57581ea7420965162b04b13b2abcad17b5f81 /xen/common | |
| parent | e7ac471d5ceb955c050c9330afd56d1cdb0da52f (diff) | |
| download | xen-282a1c2aba06d1860ed91e4df8dd4c42f1a822e6.tar.gz xen-282a1c2aba06d1860ed91e4df8dd4c42f1a822e6.tar.bz2 xen-282a1c2aba06d1860ed91e4df8dd4c42f1a822e6.zip | |
xen: Introduce a helper to read a u32 property in device tree.
Signed-off-by: Chen Baozi <baozich@gmail.com>
Acked-by: Julien Grall <julien.grall@linaro.org>
Diffstat (limited to 'xen/common')
| -rw-r--r-- | xen/common/device_tree.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c index 84d704dc3d..12499853df 100644 --- a/xen/common/device_tree.c +++ b/xen/common/device_tree.c @@ -574,6 +574,21 @@ const void *dt_get_property(const struct dt_device_node *np, return pp ? pp->value : NULL; } +bool_t dt_property_read_u32(const struct dt_device_node *np, + const char *name, u32 *out_value) +{ + u32 len; + const __be32 *val; + + val = dt_get_property(np, name, &len); + if ( !val || len < sizeof(*out_value) ) + return 0; + + *out_value = be32_to_cpup(val); + + return 1; +} + bool_t dt_device_is_compatible(const struct dt_device_node *device, const char *compat) { |