[PATCH 2/6] of: of_path: support barebox,fixed-partitions

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

barebox has for many years supported a superset of the upstream OF
partitions binding by parsing partitions out of SD/eMMC and EEPROM
in addition to MTD.

Unfortunately, we didn't upstream our binding and a different binding
went upstream into Linux v6.13-rc1 along with Linux commit
2e3a191e89f9 ("block: add support for partition table defined in OF").

Since then, if CONFIG_OF_PARTITION, which is disabled by default, is
enabled, Linux will ignore any GPT/MBR if an SD/eMMC node has a
fixed-partitions compatible subnode.

This is different from the barebox behavior, which allows both OF
partitions and GPT/MBR to co-exist as long as they don't conflict.

As many barebox boards:

  - Place the environment in non-partitioned space prior to the first
    partition

  - Fixup all fixed-partitions into the kernel device tree by default

this results in breakage if a newer kernel is booted with
CONFIG_OF_PARTITION enabled.

As first step towards resolving this, teach barebox to parse
barebox,fixed-partitions the same way it parses fixed-partitions.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 drivers/of/of_path.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/of/of_path.c b/drivers/of/of_path.c
index b3feaa07e39d..57bd82a741ba 100644
--- a/drivers/of/of_path.c
+++ b/drivers/of/of_path.c
@@ -14,7 +14,9 @@
 
 bool of_node_is_fixed_partitions(const struct device_node *np)
 {
-	return of_device_is_compatible(np, "fixed-partitions");
+	return of_device_is_compatible(np, "fixed-partitions") ||
+		of_device_is_compatible(np, "barebox,fixed-partitions");
+
 }
 
 struct device *of_find_device_by_node_path(const char *path)
-- 
2.39.5