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author | Andres Salomon <dilinger@queued.net> | 2010-10-10 21:52:57 -0600 |
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committer | Grant Likely <grant.likely@secretlab.ca> | 2010-10-12 21:58:08 -0600 |
commit | e2f2a93b6384cfe0face0be595bfbda1475d864b (patch) | |
tree | f379fda9976cba42f3fccb0bcbac71312db869d3 /drivers/of | |
parent | ed41850298f7a55519de0b8573e217ed8a45c199 (diff) | |
download | kernel_samsung_tuna-e2f2a93b6384cfe0face0be595bfbda1475d864b.zip kernel_samsung_tuna-e2f2a93b6384cfe0face0be595bfbda1475d864b.tar.gz kernel_samsung_tuna-e2f2a93b6384cfe0face0be595bfbda1475d864b.tar.bz2 |
of/promtree: add package-to-path support to pdt
package-to-path is a PROM function which tells us the real (full) name of the
node. This provides a hook for that in the prom ops struct, and makes use
of it in the pdt code when attempting to determine a node's name. If the
hook is available, try using it (falling back to looking at the "name"
property if it fails).
Signed-off-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/of')
-rw-r--r-- | drivers/of/pdt.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/drivers/of/pdt.c b/drivers/of/pdt.c index 31a4fb8..28295d0 100644 --- a/drivers/of/pdt.c +++ b/drivers/of/pdt.c @@ -132,6 +132,47 @@ static char * __init of_pdt_get_one_property(phandle node, const char *name) return buf; } +static char * __init of_pdt_try_pkg2path(phandle node) +{ + char *res, *buf = NULL; + int len; + + if (!of_pdt_prom_ops->pkg2path) + return NULL; + + if (of_pdt_prom_ops->pkg2path(node, buf, 0, &len)) + return NULL; + buf = prom_early_alloc(len + 1); + if (of_pdt_prom_ops->pkg2path(node, buf, len, &len)) { + pr_err("%s: package-to-path failed\n", __func__); + return NULL; + } + + res = strrchr(buf, '/'); + if (!res) { + pr_err("%s: couldn't find / in %s\n", __func__, buf); + return NULL; + } + return res+1; +} + +/* + * When fetching the node's name, first try using package-to-path; if + * that fails (either because the arch hasn't supplied a PROM callback, + * or some other random failure), fall back to just looking at the node's + * 'name' property. + */ +static char * __init of_pdt_build_name(phandle node) +{ + char *buf; + + buf = of_pdt_try_pkg2path(node); + if (!buf) + buf = of_pdt_get_one_property(node, "name"); + + return buf; +} + static struct device_node * __init of_pdt_create_node(phandle node, struct device_node *parent) { @@ -146,7 +187,7 @@ static struct device_node * __init of_pdt_create_node(phandle node, kref_init(&dp->kref); - dp->name = of_pdt_get_one_property(node, "name"); + dp->name = of_pdt_build_name(node); dp->type = of_pdt_get_one_property(node, "device_type"); dp->phandle = node; |