diff options
| author | Ricardo Salveti | 2021-08-31 14:53:42 +0300 |
|---|---|---|
| committer | Stefano Babic | 2021-10-21 13:59:26 +0200 |
| commit | b5a2a764547d478a3ea513bcc8c463c041ca8696 (patch) | |
| tree | fcf951438c699c059f94252415f956c0fbe99bba /arch/arm | |
| parent | cdf31924521b347980a2b4e9871acb4a995f5d24 (diff) | |
mx7ulp: add getting a board serial number
Get Unique ID of SoC iMX7ULP, using the logic described in Fusemap
(IMX7ULPRMB2_Rev0_Fusemap) attached in the i.MX 7ULP APRM [1].
[1]
https://www.nxp.com/docs/en/reference-manual/IMX7ULPRMB2.pdf
Signed-off-by: Ricardo Salveti <ricardo@foundries.io>
Co-developed-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-imx/mx7ulp/soc.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mx7ulp/soc.c b/arch/arm/mach-imx/mx7ulp/soc.c index 7f097d68503..c90ce22404a 100644 --- a/arch/arm/mach-imx/mx7ulp/soc.c +++ b/arch/arm/mach-imx/mx7ulp/soc.c @@ -13,6 +13,7 @@ #include <asm/arch/sys_proto.h> #include <asm/mach-imx/boot_mode.h> #include <asm/mach-imx/hab.h> +#include <asm/setup.h> #include <linux/bitops.h> #define PMC0_BASE_ADDR 0x410a1000 @@ -380,3 +381,25 @@ enum boot_device get_boot_device(void) return boot_dev; } + +#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG +/* + * OCOTP_CFG (SJC CHALLENGE, Unique ID) + * i.MX 7ULP Applications Processor Reference Manual, Rev. 0, 09/2020 + * + * OCOTP_CFG0 offset 0x4B0: 15:0 -> 15:0 bits of Unique ID + * OCOTP_CFG1 offset 0x4C0: 15:0 -> 31:16 bits of Unique ID + * OCOTP_CFG2 offset 0x4D0: 15:0 -> 47:32 bits of Unique ID + * OCOTP_CFG3 offset 0x4E0: 15:0 -> 63:48 bits of Unique ID + */ +void get_board_serial(struct tag_serialnr *serialnr) +{ + struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR; + struct fuse_bank *bank = &ocotp->bank[1]; + struct fuse_bank1_regs *fuse = + (struct fuse_bank1_regs *)bank->fuse_regs; + + serialnr->low = (fuse->cfg0 & 0xFFFF) + ((fuse->cfg1 & 0xFFFF) << 16); + serialnr->high = (fuse->cfg2 & 0xFFFF) + ((fuse->cfg3 & 0xFFFF) << 16); +} +#endif /* CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG */ |