Hi,
On Wed, Apr 27, 2022 at 02:14:09PM +0200, Oleksij Rempel wrote:
> 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.
Very nice! This will be usefull :)
> 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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