dm: spi: Change cs_info op to return -EINVAL for invalid cs num

[oweals/u-boot.git] / include / env.h

diff --git a/include/env.h b/include/env.h
index 727f58528f9d3f3d4b9f9d01cbfbcbcd49b1098b..b72239f6a58c915e0d133107be8108fbec15adf5 100644 (file)
--- a/include/env.h
+++ b/include/env.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
- * Common environment functions
+ * Common environment functions and definitions
  *
  * (C) Copyright 2000-2009
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
@@ -9,11 +9,59 @@
 #ifndef __ENV_H
 #define __ENV_H
 
+#include <compiler.h>
 #include <stdbool.h>
 #include <linux/types.h>
 
 struct environment_s;
 
+/* Value for environment validity */
+enum env_valid {
+       ENV_INVALID,    /* No valid environment */
+       ENV_VALID,      /* First or only environment is valid */
+       ENV_REDUND,     /* Redundant environment is valid */
+};
+
+/** enum env_op - environment callback operation */
+enum env_op {
+       env_op_create,
+       env_op_delete,
+       env_op_overwrite,
+};
+
+/** struct env_clbk_tbl - declares a new callback */
+struct env_clbk_tbl {
+       const char *name;               /* Callback name */
+       int (*callback)(const char *name, const char *value, enum env_op op,
+                       int flags);
+};
+
+/*
+ * Define a callback that can be associated with variables.
+ * when associated through the ".callbacks" environment variable, the callback
+ * will be executed any time the variable is inserted, overwritten, or deleted.
+ *
+ * For SPL these are silently dropped to reduce code size, since environment
+ * callbacks are not supported with SPL.
+ */
+#ifdef CONFIG_SPL_BUILD
+#define U_BOOT_ENV_CALLBACK(name, callback) \
+       static inline __maybe_unused void _u_boot_env_noop_##name(void) \
+       { \
+               (void)callback; \
+       }
+#else
+#define U_BOOT_ENV_CALLBACK(name, callback) \
+       ll_entry_declare(struct env_clbk_tbl, name, env_clbk) = \
+       {#name, callback}
+#endif
+
+/** enum env_redund_flags - Flags for the redundand_environment */
+enum env_redund_flags {
+       ENV_REDUND_OBSOLETE = 0,
+       ENV_REDUND_ACTIVE = 1,
+};
+
 /**
  * env_get_id() - Gets a sequence number for the environment
  *