From: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
This new variable can be set by boards from C code or from the
environment to change the serial number fixed up into the kernel device
tree.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
common/Kconfig | 5 +++++
common/misc.c | 16 ++++++++++++++++
common/oftree.c | 9 +++++++++
include/common.h | 3 +++
4 files changed, 33 insertions(+)
diff --git a/common/Kconfig b/common/Kconfig
index f7a6a96e87..d08302a573 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -1066,6 +1066,11 @@ config MACHINE_ID
Note: if no hashable information is available no machine id will be passed
to the kernel.
+config SERIAL_NUMBER_FIXUP
+ bool "fix up board serial number"
+ help
+ fixup serial number supplied by board code info device tree
+
config SYSTEMD_OF_WATCHDOG
bool "inform devicetree-enabled kernel of used watchdog"
depends on WATCHDOG && OFTREE && FLEXIBLE_BOOTARGS
diff --git a/common/misc.c b/common/misc.c
index 226635f0d4..3b3bc05bfd 100644
--- a/common/misc.c
+++ b/common/misc.c
@@ -149,6 +149,7 @@ EXPORT_SYMBOL(barebox_get_model);
BAREBOX_MAGICVAR(global.model, "Product name of this hardware");
static char *hostname;
+static char *serial_number;
/*
* The hostname is supposed to be the shortname of a board. It should
@@ -179,6 +180,21 @@ EXPORT_SYMBOL(barebox_set_hostname_no_overwrite);
BAREBOX_MAGICVAR(global.hostname,
"shortname of the board. Also used as hostname for DHCP requests");
+void barebox_set_serial_number(const char *__serial_number)
+{
+ globalvar_add_simple_string("serial_number", &serial_number);
+
+ free(serial_number);
+ serial_number = xstrdup(__serial_number);
+}
+
+const char *barebox_get_serial_number(void)
+{
+ return serial_number;
+}
+
+BAREBOX_MAGICVAR(global.serial_number, "Board serial number");
+
void __noreturn panic(const char *fmt, ...)
{
va_list args;
diff --git a/common/oftree.c b/common/oftree.c
index bce0ff09d6..c6d75055cc 100644
--- a/common/oftree.c
+++ b/common/oftree.c
@@ -207,6 +207,15 @@ static int of_fixup_bootargs(struct device_node *root, void *unused)
int instance = reset_source_get_instance();
struct device_d *dev;
+ if (IS_ENABLED(CONFIG_SERIAL_NUMBER_FIXUP)) {
+ const char *serialno;
+
+ serialno = getenv("global.serial_number");
+ if (serialno)
+ of_property_write_string(root, "serial-number", serialno);
+
+ }
+
node = of_create_node(root, "/chosen");
if (!node)
return -ENOMEM;
diff --git a/include/common.h b/include/common.h
index 4167d4676e..967502a7ab 100644
--- a/include/common.h
+++ b/include/common.h
@@ -126,4 +126,7 @@ const char *barebox_get_hostname(void);
void barebox_set_hostname(const char *);
void barebox_set_hostname_no_overwrite(const char *);
+const char *barebox_get_serial_number(void);
+void barebox_set_serial_number(const char *);
+
#endif /* __COMMON_H_ */
--
2.30.2
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