1 files changed, 26 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 1f8505c23548..fdfe14c4bdef 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -566,6 +566,32 @@ int rtas_get_sensor(int sensor, int index, int *state)
 }
 EXPORT_SYMBOL(rtas_get_sensor);
 
+bool rtas_indicator_present(int token, int *maxindex)
+{
+        int proplen, count, i;
+        const struct indicator_elem {
+                u32 token;
+                u32 maxindex;
+        } *indicators;
+
+        indicators = of_get_property(rtas.dev, "rtas-indicators", &proplen);
+        if (!indicators)
+                return false;
+
+        count = proplen / sizeof(struct indicator_elem);
+
+        for (i = 0; i < count; i++) {
+                if (indicators[i].token != token)
+                        continue;
+                if (maxindex)
+                        *maxindex = indicators[i].maxindex;
+                return true;
+        }
+
+        return false;
+}
+EXPORT_SYMBOL(rtas_indicator_present);
+
 int rtas_set_indicator(int indicator, int index, int new_value)
 {
         int token = rtas_token("set-indicator");