+struct stm32_flash_regs {
+ u32 acr;
+ u32 key;
+ u32 optkeyr;
+ u32 sr;
+ u32 cr;
+ u32 optcr;
+ u32 optcr1;
+};
+
+#define STM32_FLASH_KEY1 0x45670123
+#define STM32_FLASH_KEY2 0xCDEF89AB
+
+#define STM32_FLASH_SR_BSY (1 << 16)
+
+#define STM32_FLASH_CR_PG (1 << 0)
+#define STM32_FLASH_CR_SER (1 << 1)
+#define STM32_FLASH_CR_STRT (1 << 16)
+#define STM32_FLASH_CR_LOCK (1 << 31)
+#define STM32_FLASH_CR_SNB_OFFSET 3
+#define STM32_FLASH_CR_SNB_MASK (15 << STM32_FLASH_CR_SNB_OFFSET)
+
+/* Flash ACR: Access control register */
+#define FLASH_ACR_WS(n) n
+#define FLASH_ACR_PRFTEN (1 << 8)
+#define FLASH_ACR_ICEN (1 << 9)
+#define FLASH_ACR_DCEN (1 << 10)