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rpi: set board serial number in environment

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Gets propagated into the device tree and then into /proc/cpuinfo where
users often expect it.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Reviewed-by: Stephen Warren <swarren@wwwdotorg.org>
This commit is contained in:
Lubomir Rintel 2016-02-22 22:06:47 +01:00 committed by Tom Rini
parent 6f6051fac3
commit 757cd149b9
2 changed files with 44 additions and 0 deletions
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11
arch/arm/mach-bcm283x/include/mach/mbox.h
View file

@ -150,6 +150,17 @@ struct bcm2835_mbox_tag_get_mac_address {
} body;
};
#define BCM2835_MBOX_TAG_GET_BOARD_SERIAL 0x00010004
struct bcm2835_mbox_tag_get_board_serial {
struct bcm2835_mbox_tag_hdr tag_hdr;
union {
struct __packed {
u64 serial;
} resp;
} body;
};
#define BCM2835_MBOX_TAG_GET_ARM_MEMORY 0x00010005
struct bcm2835_mbox_tag_get_arm_mem {

33
board/raspberrypi/rpi/rpi.c
View file

@ -5,6 +5,7 @@
*/
#include <common.h>
#include <inttypes.h>
#include <config.h>
#include <dm.h>
#include <fdt_support.h>
@ -56,6 +57,12 @@ struct msg_get_board_rev {
u32 end_tag;
};
struct msg_get_board_serial {
struct bcm2835_mbox_hdr hdr;
struct bcm2835_mbox_tag_get_board_serial get_board_serial;
u32 end_tag;
};
struct msg_get_mac_address {
struct bcm2835_mbox_hdr hdr;
struct bcm2835_mbox_tag_get_mac_address get_mac_address;
@ -281,6 +288,30 @@ static void set_board_info(void)
}
#endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */
static void set_serial_number(void)
{
ALLOC_CACHE_ALIGN_BUFFER(struct msg_get_board_serial, msg, 1);
int ret;
char serial_string[17] = { 0 };
if (getenv("serial#"))
return;
BCM2835_MBOX_INIT_HDR(msg);
BCM2835_MBOX_INIT_TAG_NO_REQ(&msg->get_board_serial, GET_BOARD_SERIAL);
ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
if (ret) {
printf("bcm2835: Could not query board serial\n");
/* Ignore error; not critical */
return;
}
snprintf(serial_string, sizeof(serial_string), "%016" PRIx64,
msg->get_board_serial.body.resp.serial);
setenv("serial#", serial_string);
}
int misc_init_r(void)
{
set_fdtfile();
@ -288,6 +319,8 @@ int misc_init_r(void)
#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
set_board_info();
#endif
set_serial_number();
return 0;
}