From e25dc290aa85ea3b68000295e352681acfa53617 Mon Sep 17 00:00:00 2001 From: Peng Fan Date: Mon, 22 Jul 2019 01:25:05 +0000 Subject: [PATCH] i.MX7ULP: Add CPU revision check for B0 Since there is no register for CPU revision, we use ROM version to check the A0 or B0 chip. Signed-off-by: Peng Fan --- arch/arm/mach-imx/mx7ulp/soc.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-imx/mx7ulp/soc.c b/arch/arm/mach-imx/mx7ulp/soc.c index 7119ee4..6c53aa1 100644 --- a/arch/arm/mach-imx/mx7ulp/soc.c +++ b/arch/arm/mach-imx/mx7ulp/soc.c @@ -18,10 +18,13 @@ struct imx_sec_config_fuse_t const imx_sec_config_fuse = { }; #endif +#define ROM_VERSION_ADDR 0x80 u32 get_cpu_rev(void) { - /* Temporally hard code the CPU rev to 0x73, rev 1.0. Fix it later */ - return (MXC_CPU_MX7ULP << 12) | (1 << 4); + /* Check the ROM version for cpu revision */ + u32 rom_version = readl((void __iomem *)ROM_VERSION_ADDR); + + return (MXC_CPU_MX7ULP << 12) | (rom_version & 0xFF); } #ifdef CONFIG_REVISION_TAG -- 2.7.4