env: restore old env_get_char() behaviour

With multiple environments, the 'get_char' callback for env
drivers does not really make sense any more because it is
only supported by two drivers (eeprom and nvram).

To restore single character loading for these drivers,
override 'env_get_char_spec'.

Signed-off-by: Simon Goldschmidt <sgoldschmidt@de.pepperl-fuchs.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>

1 files changed, 7 insertions, 22 deletions

diff --git a/env/env.c b/env/env.c
index edfb575..3795dbc 100644
--- a/env/env.c
+++ b/env/env.c
@@ -147,32 +147,17 @@ static struct env_driver *env_driver_lookup(enum env_operation op, int prio)
 	return drv;
 }
 
-int env_get_char(int index)
+__weak int env_get_char_spec(int index)
 {
-	struct env_driver *drv;
-	int prio;
+	return *(uchar *)(gd->env_addr + index);
+}
 
+int env_get_char(int index)
+{
 	if (gd->env_valid == ENV_INVALID)
 		return default_environment[index];
-
-	for (prio = 0; (drv = env_driver_lookup(ENVOP_GET_CHAR, prio)); prio++) {
-		int ret;
-
-		if (!drv->get_char)
-			continue;
-
-		if (!env_has_inited(drv->location))
-			continue;
-
-		ret = drv->get_char(index);
-		if (!ret)
-			return 0;
-
-		debug("%s: Environment %s failed to load (err=%d)\n", __func__,
-		      drv->name, ret);
-	}
-
-	return -ENODEV;
+	else
+		return env_get_char_spec(index);
 }
 
 int env_load(void)