PM / sleep: Add support for read-only sysfs attributes

[firefly-linux-kernel-4.4.55.git] / kernel / power / power.h

diff --git a/kernel/power/power.h b/kernel/power/power.h
index caadb566e82bb51a5348d6ba67a73bda8c99f37d..efe1b3b17c88d0eb793fa84ceec00e5b31604af4 100644 (file)
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -77,6 +77,15 @@ static struct kobj_attribute _name##_attr = {        \
        .store  = _name##_store,                \
 }
 
+#define power_attr_ro(_name) \
+static struct kobj_attribute _name##_attr = {  \
+       .attr   = {                             \
+               .name = __stringify(_name),     \
+               .mode = S_IRUGO,                \
+       },                                      \
+       .show   = _name##_show,                 \
+}
+
 /* Preferred image size in bytes (default 500 MB) */
 extern unsigned long image_size;
 /* Size of memory reserved for drivers (default SPARE_PAGES x PAGE_SIZE) */