diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2013-08-05 14:40:44 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-12 11:23:53 -0700 |
| commit | 5c19e95216b93b0d29c6a4887e69a980edc6fc81 (patch) | |
| tree | 345252b59a83bec24735caa96beead84f38a107d /drivers/of | |
| parent | a324e4de0ce5c467b33a54ed65cc2f41c68855ae (diff) | |
OF: Add helper for matching against linux,stdout-path
devicetrees may have a linux,stdout-path property in the chosen
node describing the console device. This adds a helper function
to match a device against this property so a driver can call
add_preferred_console for a matching device.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/base.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index 5c5427918eb..1c3c79c7974 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -32,6 +32,7 @@ struct device_node *of_allnodes; EXPORT_SYMBOL(of_allnodes); struct device_node *of_chosen; struct device_node *of_aliases; +static struct device_node *of_stdout; DEFINE_MUTEX(of_aliases_mutex); @@ -1595,6 +1596,15 @@ void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)) of_chosen = of_find_node_by_path("/chosen"); if (of_chosen == NULL) of_chosen = of_find_node_by_path("/chosen@0"); + + if (of_chosen) { + const char *name; + + name = of_get_property(of_chosen, "linux,stdout-path", NULL); + if (name) + of_stdout = of_find_node_by_path(name); + } + of_aliases = of_find_node_by_path("/aliases"); if (!of_aliases) return; @@ -1703,3 +1713,19 @@ const char *of_prop_next_string(struct property *prop, const char *cur) return curv; } EXPORT_SYMBOL_GPL(of_prop_next_string); + +/** + * of_device_is_stdout_path - check if a device node matches the + * linux,stdout-path property + * + * Check if this device node matches the linux,stdout-path property + * in the chosen node. return true if yes, false otherwise. + */ +int of_device_is_stdout_path(struct device_node *dn) +{ + if (!of_stdout) + return false; + + return of_stdout == dn; +} +EXPORT_SYMBOL_GPL(of_device_is_stdout_path); |