From: Ye Li ye.li@nxp.com
i.MX8MQ B2 is using same value in OCOTP_READ_FUSE_DATA like B1, so we have to check the ROM verision to distinguish the revision.
As we have checked the B1 rev for sticky bits work around in secure boot. So it won't apply on B2.
Signed-off-by: Ye Li ye.li@nxp.com Reviewed-by: Peng Fan peng.fan@nxp.com Signed-off-by: Peng Fan peng.fan@nxp.com --- arch/arm/include/asm/arch-imx/cpu.h | 1 + arch/arm/mach-imx/imx8m/soc.c | 11 ++++++++++- 2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/arch/arm/include/asm/arch-imx/cpu.h b/arch/arm/include/asm/arch-imx/cpu.h index 28244d7671..ef090eb2f2 100644 --- a/arch/arm/include/asm/arch-imx/cpu.h +++ b/arch/arm/include/asm/arch-imx/cpu.h @@ -65,6 +65,7 @@ #define CHIP_REV_1_5 0x15 #define CHIP_REV_2_0 0x20 #define CHIP_REV_2_1 0x21 +#define CHIP_REV_2_2 0x22 #define CHIP_REV_2_5 0x25 #define CHIP_REV_3_0 0x30
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index c447ea2ab9..573cacb10d 100644 --- a/arch/arm/mach-imx/imx8m/soc.c +++ b/arch/arm/mach-imx/imx8m/soc.c @@ -410,7 +410,16 @@ u32 get_cpu_rev(void) * 0xff0055aa is magic number for B1. */ if (readl((void __iomem *)(OCOTP_BASE_ADDR + 0x40)) == 0xff0055aa) { - reg = CHIP_REV_2_1; + /* + * B2 uses same DIGPROG and OCOTP_READ_FUSE_DATA value with B1, + * so have to check ROM to distinguish them + */ + rom_version = readl((void __iomem *)ROM_VERSION_B0); + rom_version &= 0xff; + if (rom_version == CHIP_REV_2_2) + reg = CHIP_REV_2_2; + else + reg = CHIP_REV_2_1; } else { rom_version = readl((void __iomem *)ROM_VERSION_A0);