[U-Boot] [PATCH 10/16] stm32mp1: add bootcount support

[Patrick Delaunay]

Activate bootcount and use TAMP register to store the count value.

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

 arch/arm/mach-stm32mp/Kconfig              | 11 +++++++++++
 arch/arm/mach-stm32mp/include/mach/stm32.h |  1 +
 2 files changed, 12 insertions(+)

diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index 26dace10..c984616 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -39,6 +39,8 @@ config TARGET_STM32MP1
 	select STM32_RCC
 	select STM32_RESET
 	select SYS_ARCH_TIMER
+	imply BOOTCOUNT_LIMIT
+	imply CMD_BOOTCOUNT
 	imply SYSRESET_PSCI if STM32MP1_TRUSTED
 	imply SYSRESET_SYSCON if !STM32MP1_TRUSTED
 	help
@@ -76,6 +78,15 @@ config SYS_MMCSD_RAW_MODE_U_BOOT_PARTITION_MMC2
 	  Partition on the second MMC to load U-Boot from when the MMC is being
 	  used in raw mode
 
+if BOOTCOUNT_LIMIT
+config SYS_BOOTCOUNT_SINGLEWORD
+	default y
+
+# TAMP_BOOTCOUNT = TAMP_BACKUP_REGISTER(21)
+config SYS_BOOTCOUNT_ADDR
+	default 0x5C00A154
+endif
+
 if DEBUG_UART
 
 config DEBUG_UART_BOARD_INIT
diff --git a/arch/arm/mach-stm32mp/include/mach/stm32.h b/arch/arm/mach-stm32mp/include/mach/stm32.h
index c526c88..6795352 100644
--- a/arch/arm/mach-stm32mp/include/mach/stm32.h
+++ b/arch/arm/mach-stm32mp/include/mach/stm32.h
@@ -88,6 +88,7 @@ enum boot_device {
 #define TAMP_BACKUP_MAGIC_NUMBER	TAMP_BACKUP_REGISTER(4)
 #define TAMP_BACKUP_BRANCH_ADDRESS	TAMP_BACKUP_REGISTER(5)
 #define TAMP_BOOT_CONTEXT		TAMP_BACKUP_REGISTER(20)
+#define TAMP_BOOTCOUNT			TAMP_BACKUP_REGISTER(21)
 
 #define TAMP_BOOT_MODE_MASK		GENMASK(15, 8)
 #define TAMP_BOOT_MODE_SHIFT		8
-- 
2.7.4