bootcount: add uclass for bootcount

[platform/kernel/u-boot.git] / include / bootcount.h

diff --git a/include/bootcount.h b/include/bootcount.h
index 671adcc..daee843 100644 (file)
--- a/include/bootcount.h
+++ b/include/bootcount.h
@@ -10,6 +10,54 @@
 #include <asm/io.h>
 #include <asm/byteorder.h>
 
+#ifdef CONFIG_DM_BOOTCOUNT
+
+struct bootcount_ops {
+       /**
+        * get() - get the current bootcount value
+        *
+        * Returns the current counter value of the bootcount backing
+        * store.
+        *
+        * @dev:        Device to read from
+        * @bootcount:  Address to put the current bootcount value
+        */
+       int (*get)(struct udevice *dev, u32 *bootcount);
+
+       /**
+        * set() - set a bootcount value (e.g. to reset or increment)
+        *
+        * Sets the value in the bootcount backing store.
+        *
+        * @dev:        Device to read from
+        * @bootcount:  New bootcount value to store
+        */
+       int (*set)(struct udevice *dev, const u32 bootcount);
+};
+
+/* Access the operations for a bootcount device */
+#define bootcount_get_ops(dev) ((struct bootcount_ops *)(dev)->driver->ops)
+
+/**
+ * dm_bootcount_get() - Read the current value from a bootcount storage
+ *
+ * @dev:       Device to read from
+ * @bootcount: Place to put the current bootcount
+ * @return 0 if OK, -ve on error
+ */
+int dm_bootcount_get(struct udevice *dev, u32 *bootcount);
+
+/**
+ * dm_bootcount_set() - Write a value to a bootcount storage
+ *
+ * @dev:       Device to read from
+ * @bootcount:  Value to be written to the backing storage
+ * @return 0 if OK, -ve on error
+ */
+int dm_bootcount_set(struct udevice *dev, u32 bootcount);
+
+#endif
+
 #if defined(CONFIG_SPL_BOOTCOUNT_LIMIT) || defined(CONFIG_BOOTCOUNT_LIMIT)
 
 #if !defined(CONFIG_SYS_BOOTCOUNT_LE) && !defined(CONFIG_SYS_BOOTCOUNT_BE)