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ARM: mx6: Add function to set serial#

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The serial number OTP is similar to the imx7 version, except that the
register names are different. This also sets serial# directly, instead of
providing board_get_serial.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Sean Anderson 2021-02-04 16:44:22 -05:00 committed by Stefano Babic
parent 3f9a27d80b
commit 1ce6e10c61
1 changed files with 37 additions and 0 deletions
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37
arch/arm/mach-imx/mx6/soc.c
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@ -7,6 +7,7 @@
*/
#include <common.h>
#include <env.h>
#include <init.h>
#include <linux/delay.h>
#include <linux/errno.h>
@ -696,11 +697,47 @@ void imx_setup_hdmi(void)
#endif
#ifdef CONFIG_ARCH_MISC_INIT
/*
* UNIQUE_ID describes a unique ID based on silicon wafer
* and die X/Y position
*
* UNIQUE_ID offset 0x410
* 31:0 fuse 0
* FSL-wide unique, encoded LOT ID STD II/SJC CHALLENGE/ Unique ID
*
* UNIQUE_ID offset 0x420
* 31:24 fuse 1
* The X-coordinate of the die location on the wafer/SJC CHALLENGE/ Unique ID
* 23:16 fuse 1
* The Y-coordinate of the die location on the wafer/SJC CHALLENGE/ Unique ID
* 15:11 fuse 1
* The wafer number of the wafer on which the device was fabricated/SJC
* CHALLENGE/ Unique ID
* 10:0 fuse 1
* FSL-wide unique, encoded LOT ID STD II/SJC CHALLENGE/ Unique ID
*/
static void setup_serial_number(void)
{
char serial_string[17];
struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
struct fuse_bank *bank = &ocotp->bank[0];
struct fuse_bank0_regs *fuse =
(struct fuse_bank0_regs *)bank->fuse_regs;
if (env_get("serial#"))
return;
snprintf(serial_string, sizeof(serial_string), "%08x%08x",
fuse->uid_low, fuse->uid_high);
env_set("serial#", serial_string);
}
int arch_misc_init(void)
{
#ifdef CONFIG_FSL_CAAM
sec_init();
#endif
setup_serial_number();
return 0;
}
#endif