stm32f429: pass the device unique ID in DTB
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
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 @@
/*
* 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)