| Message ID | 1437315588-20060-1-git-send-email-borneo.antonio@gmail.com |
|---|---|
| State | Accepted |
| Delegated to: | Tom Rini |
| Headers | show |
On Sun, Jul 19, 2015 at 10:19:46PM +0800, Antonio Borneo wrote: > Read device unique ID and set environment variable "serial#". > Value would then be passed to kernel through DTB. > > To read ID from DTB, kernel is required to have commit: > 3f599875e5202986b350618a617527ab441bf206 (ARM: 8355/1: arch: Show > the serial number from devicetree in cpuinfo) > This commit is already mainline since v4.1-rc1. > > Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> > To: Albert Aribaud <albert.u.boot@aribaud.net> > To: Tom Rini <trini@konsulko.com> > To: Kamil Lulko <rev13@wp.pl> > Cc: u-boot@lists.denx.de Applied to u-boot/master, thanks!
diff --git a/arch/arm/include/asm/arch-stm32f4/stm32.h b/arch/arm/include/asm/arch-stm32f4/stm32.h index a9f88db..3ed3801 100644 --- a/arch/arm/include/asm/arch-stm32f4/stm32.h +++ b/arch/arm/include/asm/arch-stm32f4/stm32.h @@ -14,6 +14,7 @@ /* * Peripheral memory map */ +#define STM32_SYSMEM_BASE 0x1FFF0000 #define STM32_PERIPH_BASE 0x40000000 #define STM32_APB1PERIPH_BASE (STM32_PERIPH_BASE + 0x00000000) #define STM32_APB2PERIPH_BASE (STM32_PERIPH_BASE + 0x00010000) @@ -25,6 +26,12 @@ /* * Register maps */ +struct stm32_u_id_regs { + u32 u_id_low; + u32 u_id_mid; + u32 u_id_high; +}; + struct stm32_rcc_regs { u32 cr; /* RCC clock control */ u32 pllcfgr; /* RCC PLL configuration */ @@ -78,6 +85,9 @@ struct stm32_flash_regs { /* * Registers access macros */ +#define STM32_U_ID_BASE (STM32_SYSMEM_BASE + 0x7A10) +#define STM32_U_ID ((struct stm32_u_id_regs *)STM32_U_ID_BASE) + #define STM32_RCC_BASE (STM32_AHB1PERIPH_BASE + 0x3800) #define STM32_RCC ((struct stm32_rcc_regs *)STM32_RCC_BASE) diff --git a/board/st/stm32f429-discovery/stm32f429-discovery.c b/board/st/stm32f429-discovery/stm32f429-discovery.c index 2dd5d93..f418186 100644 --- a/board/st/stm32f429-discovery/stm32f429-discovery.c +++ b/board/st/stm32f429-discovery/stm32f429-discovery.c @@ -285,3 +285,22 @@ int board_init(void) return 0; } + +#ifdef CONFIG_MISC_INIT_R +int misc_init_r(void) +{ + char serialno[25]; + uint32_t u_id_low, u_id_mid, u_id_high; + + if (!getenv("serial#")) { + u_id_low = readl(&STM32_U_ID->u_id_low); + u_id_mid = readl(&STM32_U_ID->u_id_mid); + u_id_high = readl(&STM32_U_ID->u_id_high); + sprintf(serialno, "%08x%08x%08x", + u_id_high, u_id_mid, u_id_low); + setenv("serial#", serialno); + } + + return 0; +} +#endif diff --git a/include/configs/stm32f429-discovery.h b/include/configs/stm32f429-discovery.h index 1b4fd21..4cc7324 100644 --- a/include/configs/stm32f429-discovery.h +++ b/include/configs/stm32f429-discovery.h @@ -15,6 +15,7 @@ #define CONFIG_OF_LIBFDT #define CONFIG_BOARD_EARLY_INIT_F +#define CONFIG_MISC_INIT_R #define CONFIG_SYS_FLASH_BASE 0x08000000
Read device unique ID and set environment variable "serial#". Value would then be passed to kernel through DTB. To read ID from DTB, kernel is required to have commit: 3f599875e5202986b350618a617527ab441bf206 (ARM: 8355/1: arch: Show the serial number from devicetree in cpuinfo) This commit is already mainline since v4.1-rc1. Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com> To: Albert Aribaud <albert.u.boot@aribaud.net> To: Tom Rini <trini@konsulko.com> To: Kamil Lulko <rev13@wp.pl> Cc: u-boot@lists.denx.de --- arch/arm/include/asm/arch-stm32f4/stm32.h | 10 ++++++++++ board/st/stm32f429-discovery/stm32f429-discovery.c | 19 +++++++++++++++++++ include/configs/stm32f429-discovery.h | 1 + 3 files changed, 30 insertions(+)