From f8b8a554633f61c3a3e8dde3236917372edc977f Mon Sep 17 00:00:00 2001
From: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Date: Tue, 16 May 2017 00:16:31 +0200
Subject: [PATCH] env_mmc: configure environment offsets via device tree
This introduces the ability to override the environment offets from the
device tree by setting the following nodes in '/config':
'u-boot,mmc-env-offset' - overrides CONFIG_ENV_OFFSET
'u-boot,mmc-env-offset-redundant'
- overrides CONFIG_ENV_OFFSET_REDUND
To keep with the previous logic, the CONFIG_* defines still need to
be available and the statically defined values become the defaults,
when the corresponding properties are not set in the device-tree.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
common/env_mmc.c | 31 +++++++++++++++++++++++++++----
1 file changed, 27 insertions(+), 4 deletions(-)
diff --git a/common/env_mmc.c b/common/env_mmc.c
index a5d14d448c..45d95a1e23 100644
--- a/common/env_mmc.c
+++ b/common/env_mmc.c
@@ -10,6 +10,7 @@
#include <command.h>
#include <environment.h>
+#include <fdtdec.h>
#include <linux/stddef.h>
#include <malloc.h>
#include <memalign.h>
@@ -36,15 +37,37 @@ DECLARE_GLOBAL_DATA_PTR;
#define CONFIG_ENV_OFFSET 0
#endif
-__weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static inline s64 mmc_offset(int copy)
{
- s64 offset;
+ const char *propname = "u-boot,mmc-env-offset";
+ s64 defvalue = CONFIG_ENV_OFFSET;
- offset = CONFIG_ENV_OFFSET;
-#ifdef CONFIG_ENV_OFFSET_REDUND
+#if defined(CONFIG_ENV_OFFSET_REDUND)
+ if (copy) {
+ propname = "u-boot,mmc-env-offset-redundant";
+ defvalue = CONFIG_ENV_OFFSET_REDUND;
+ }
+#endif
+
+ return fdtdec_get_config_int(gd->fdt_blob, propname, defvalue);
+}
+#else
+static inline s64 mmc_offset(int copy)
+{
+ s64 offset = CONFIG_ENV_OFFSET;
+
+#if defined(CONFIG_ENV_OFFSET_REDUND)
if (copy)
offset = CONFIG_ENV_OFFSET_REDUND;
#endif
+ return offset;
+}
+#endif
+
+__weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
+{
+ s64 offset = mmc_offset(copy);
if (offset < 0)
offset += mmc->capacity;
--
2.39.5