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authorAndrey Smirnov <andrew.smirnov@gmail.com>2018-05-17 14:29:17 -0700
committerSascha Hauer <s.hauer@pengutronix.de>2018-05-18 08:31:32 +0200
commit58243d98b3f8e000c674a78a9466bd2fce213cc6 (patch)
tree794cf2ab07dcf6f572323e8cad24e85458ddc034 /common
parent89677d11e714464d430f9dc09a21fb349d3fb931 (diff)
downloadbarebox-58243d98b3f8e000c674a78a9466bd2fce213cc6.tar.gz
barebox-58243d98b3f8e000c674a78a9466bd2fce213cc6.tar.xz
common: oftree: Pass reset source and reset source instance to kernel
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.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'common')
-rw-r--r--common/oftree.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/common/oftree.c b/common/oftree.c
index a38dfff293..5bb5420a78 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);
}