Detecting reset reason is, in some cases, a destructive operation and
in such cases it is impossible to obtain that information in the
kernel without some help from barebox.
Pass reset source and reset source instance to kernel to Linux to make
it availible to Linux userspace. This info is placeed under
/chosen/bootsource and it can be read under Linux in
/sys/firmware/devicetree/base/chosen/reset-source.
and
/sys/firmware/devicetree/base/chosen/reset-source-instance.
Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
---
common/oftree.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/common/oftree.c b/common/oftree.c
index a38dfff29..5bb5420a7 100644
--- a/common/oftree.c
+++ b/common/oftree.c
@@ -13,6 +13,7 @@
#include <boot.h>
#include <bootsource.h>
#include <i2c/i2c.h>
+#include <reset_source.h>
#define MAX_LEVEL 32 /* how deeply nested we will go */
@@ -158,6 +159,10 @@ static int of_fixup_bootargs(struct device_node *root,
void *unused)
if (err)
return err;
+ of_property_write_string(node, "reset-source", reset_source_name());
+ of_property_write_u32(node, "reset-source-instance",
+ reset_source_get_instance());
+
return of_fixup_bootargs_bootsource(root, node);
}
--
2.17.0
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