diff options
| author | Sean Anderson | 2021-02-04 16:44:22 -0500 |
|---|---|---|
| committer | Stefano Babic | 2021-03-01 10:21:36 +0100 |
| commit | 1ce6e10c61c7d74fce79749ef37066dcf5b52b41 (patch) | |
| tree | e663976d768a942705b0415d9fdb92c3b1852c66 /arch | |
| parent | 3f9a27d80bcb82a14d84abc99d90e2cab8b1dcc1 (diff) | |
ARM: mx6: Add function to set serial#
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-imx/mx6/soc.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mx6/soc.c b/arch/arm/mach-imx/mx6/soc.c index bf6dddfdc9d..aacfc854a2f 100644 --- a/arch/arm/mach-imx/mx6/soc.c +++ b/arch/arm/mach-imx/mx6/soc.c @@ -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 |