env: Implement lower priority arch_env_get_location()
Currently there is only one way to override desired environment location,
by implementing env_get_location(). This is increasingly being conflated
both on board level and architecture level, which leads to a problem on
boards where this function is already implemented on architecture level,
since those boards have no way to override this environment location on
board level anymore.
Implement arch_env_get_location() function which is architecture specific
and should only ever be implemented in architecture code. This function
has lower priority than env_get_location(), which should only ever be
implemented in board code, and which overrides the arch_env_get_location()
architecture environment selection.
This way, architecture can define its default environment chooser, while
board can now override it as needed at all times.
There is no functional change, since env_get_location() simply returns
arch_env_get_location(), and arch_env_get_location() implements the
current env_get_location() default content.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Adam Ford <aford173@gmail.com>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Marek Behún <marek.behun@nic.cz>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tim Harvey <tharvey@gateworks.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Tommaso Merciai <tomm.merciai@gmail.com>
Cc: Vladimir Oltean <vladimir.oltean@nxp.com>
diff --git a/include/env_internal.h b/include/env_internal.h
index b704c03..f30fd61 100644
--- a/include/env_internal.h
+++ b/include/env_internal.h
@@ -235,9 +235,25 @@
const char *env_ext4_get_dev_part(void);
/**
+ * arch_env_get_location()- Provide the best location for the U-Boot environment
+ *
+ * It is a weak function allowing board to overidde the environment location
+ * on architecture level. This has lower priority than env_get_location(),
+ * which can be defined on board level.
+ *
+ * @op: operations performed on the environment
+ * @prio: priority between the multiple environments, 0 being the
+ * highest priority
+ * Return: an enum env_location value on success, or -ve error code.
+ */
+enum env_location arch_env_get_location(enum env_operation op, int prio);
+
+/**
* env_get_location()- Provide the best location for the U-Boot environment
*
* It is a weak function allowing board to overidde the environment location
+ * on board level. This has higher priority than arch_env_get_location(),
+ * which can be defined on architecture level.
*
* @op: operations performed on the environment
* @prio: priority between the multiple environments, 0 being the