[PATCH 1/3] env: mmc: allow support of mmc_get_env_dev with OF_CONTROL

[Patrick Delaunay]

Use the weak function mmc_get_env_dev in mmc_offset_try_partition
function to allow dynamic selection of mmc device to use
and no more use directly the define CONFIG_SYS_MMC_ENV_DEV.

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

 env/mmc.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/env/mmc.c b/env/mmc.c
index 251ad07d7c..902cca23ad 100644
--- a/env/mmc.c
+++ b/env/mmc.c
@@ -24,14 +24,25 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#if !defined(CONFIG_SYS_MMC_ENV_DEV)
+#define CONFIG_SYS_MMC_ENV_DEV 0
+#endif
+
+__weak int mmc_get_env_dev(void)
+{
+	return CONFIG_SYS_MMC_ENV_DEV;
+}
+
 #if CONFIG_IS_ENABLED(OF_CONTROL)
 static inline int mmc_offset_try_partition(const char *str, s64 *val)
 {
 	disk_partition_t info;
 	struct blk_desc *desc;
 	int len, i, ret;
+	char dev_str[4];
 
-	ret = blk_get_device_by_str("mmc", STR(CONFIG_SYS_MMC_ENV_DEV), &desc);
+	snprintf(dev_str, sizeof(dev_str), "%d", mmc_get_env_dev());
+	ret = blk_get_device_by_str("mmc", dev_str, &desc);
 	if (ret < 0)
 		return (ret);
 
@@ -114,11 +125,6 @@ __weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
 	return 0;
 }
 
-__weak int mmc_get_env_dev(void)
-{
-	return CONFIG_SYS_MMC_ENV_DEV;
-}
-
 #ifdef CONFIG_SYS_MMC_ENV_PART
 __weak uint mmc_get_env_part(struct mmc *mmc)
 {
-- 
2.17.1