diff options
Diffstat (limited to 'arch/arm/mach-stm32mp/include/mach/revision.h')
| -rw-r--r-- | arch/arm/mach-stm32mp/include/mach/revision.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/arm/mach-stm32mp/include/mach/revision.h b/arch/arm/mach-stm32mp/include/mach/revision.h index 2eb4d44b33..2ef8ef30c3 100644 --- a/arch/arm/mach-stm32mp/include/mach/revision.h +++ b/arch/arm/mach-stm32mp/include/mach/revision.h @@ -6,6 +6,9 @@ #ifndef __MACH_CPUTYPE_H__ #define __MACH_CPUTYPE_H__ +#include <mach/bsec.h> +#include <asm/io.h> +#include <mach/stm32.h> /* ID = Device Version (bit31:16) + Device Part Number (RPN) (bit7:0) * 157X: 2x Cortex-A7, Cortex-M4, CAN FD, GPU, DSI @@ -45,4 +48,52 @@ int stm32mp_package(void); #define cpu_is_stm32mp151c() (stm32mp_cputype() == CPU_STM32MP151Cxx) #define cpu_is_stm32mp151a() (stm32mp_cputype() == CPU_STM32MP151Axx) +/* DBGMCU register */ +#define DBGMCU_APB4FZ1 (STM32_DBGMCU_BASE + 0x2C) +#define DBGMCU_IDC (STM32_DBGMCU_BASE + 0x00) +#define DBGMCU_IDC_DEV_ID_MASK GENMASK(11, 0) +#define DBGMCU_IDC_DEV_ID_SHIFT 0 +#define DBGMCU_IDC_REV_ID_MASK GENMASK(31, 16) +#define DBGMCU_IDC_REV_ID_SHIFT 16 + +#define RCC_DBGCFGR (STM32_RCC_BASE + 0x080C) +#define RCC_DBGCFGR_DBGCKEN BIT(8) + +/* BSEC OTP index */ +#define BSEC_OTP_RPN 1 +#define BSEC_OTP_PKG 16 + +/* Device Part Number (RPN) = OTP_DATA1 lower 8 bits */ +#define RPN_SHIFT 0 +#define RPN_MASK GENMASK(7, 0) + +static inline u32 stm32mp_read_idc(void) +{ + setbits_le32(RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN); + return readl(IOMEM(DBGMCU_IDC)); +} + +/* Get Device Part Number (RPN) from OTP */ +static inline int __stm32mp_get_cpu_rpn(u32 *rpn) +{ + int ret = bsec_read_field(BSEC_OTP_RPN, rpn); + if (ret) + return ret; + + *rpn = (*rpn >> RPN_SHIFT) & RPN_MASK; + return 0; +} + +static inline int __stm32mp_get_cpu_type(u32 *type) +{ + u32 id; + int ret = __stm32mp_get_cpu_rpn(type); + if (ret) + return ret; + + id = (stm32mp_read_idc() & DBGMCU_IDC_DEV_ID_MASK) >> DBGMCU_IDC_DEV_ID_SHIFT; + *type |= id << 16; + return 0; +} + #endif /* __MACH_CPUTYPE_H__ */ |