tegra: i2c: Add function to know about current bus

[u-boot] / include / hash.h

diff --git a/include/hash.h b/include/hash.h
index 88fa2b5a577b7c641057c178cedc6f7cdb17246a..c402067af8a755156e5ffa9430ea236a0d3a008a 100644 (file)
--- a/include/hash.h
+++ b/include/hash.h
@@ -22,7 +22,7 @@
 #ifndef _HASH_H
 #define _HASH_H
 
-#ifdef CONFIG_SHA1SUM_VERIFY
+#if defined(CONFIG_SHA1SUM_VERIFY) || defined(CONFIG_CRC32_VERIFY)
 #define CONFIG_HASH_VERIFY
 #endif
 
@@ -61,7 +61,7 @@ enum {
  *
  * This common function is used to implement specific hash commands.
  *
- * @algo_name:         Hash algorithm being used
+ * @algo_name:         Hash algorithm being used (lower case!)
  * @flags:             Flags value (HASH_FLAG_...)
  * @cmdtp:             Pointer to command table entry
  * @flag:              Some flags normally 0 (see CMD_FLAG_.. above)
@@ -71,4 +71,26 @@ enum {
 int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
                 int argc, char * const argv[]);
 
+/**
+ * hash_block() - Hash a block according to the requested algorithm
+ *
+ * The caller probably knows the hash length for the chosen algorithm, but
+ * in order to provide a general interface, and output_size parameter is
+ * provided.
+ *
+ * @algo_name:         Hash algorithm to use
+ * @data:              Data to hash
+ * @len:               Lengh of data to hash in bytes
+ * @output:            Place to put hash value
+ * @output_size:       On entry, pointer to the number of bytes available in
+ *                     output. On exit, pointer to the number of bytes used.
+ *                     If NULL, then it is assumed that the caller has
+ *                     allocated enough space for the hash. This is possible
+ *                     since the caller is selecting the algorithm.
+ * @return 0 if ok, -ve on error: -EPROTONOSUPPORT for an unknown algorithm,
+ * -ENOSPC if the output buffer is not large enough.
+ */
+int hash_block(const char *algo_name, const void *data, unsigned int len,
+              uint8_t *output, int *output_size);
+
 #endif