From: Guenter Roeck <linux@roeck-us.net>
Date: Wed, 21 Feb 2018 20:58:03 +0000 (-0800)
Subject: compat: Introduce DEVICE_ATTR_RO
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=de7345ca24094c5df0ee17c49998e3faf6cd6dda;p=groeck-nct6775

compat: Introduce DEVICE_ATTR_RO

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---

diff --git a/compat.h b/compat.h
index 4ea3a99..de03ccb 100644
--- a/compat.h
+++ b/compat.h
@@ -234,4 +234,16 @@ module_exit(__driver##_exit);
 #define sysfs_attr_init(attr) do {} while (0)
 #endif
 
+#ifndef __ATTR_RO
+#define __ATTR_RO(_name) {						\
+	.attr   = { .name = __stringify(_name), .mode = 0444 },		\
+	.show   = _name##_show,						\
+}
+#endif
+
+#ifndef DEVICE_ATTR_RO
+#define DEVICE_ATTR_RO(_name) \
+	struct device_attribute dev_attr_##_name = __ATTR_RO(_name)
+#endif
+
 #endif /* __COMPAT_H */