[U-Boot] [PATCH v2 15/16] rockchip: rk3399: Add bootcount support

[Jagan Teki]

Add bootcount support for Rockchip rk3399.

The bootcount value is preserved in PMU_SYS_REG0 register,
this would help to support redundent boot.

Once the redundant boot triggers, the altboot command
will look for extlinux-rollback.conf on particular
bootable partition which supposed to be a recovery
partition where redundant boot required.

Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
 arch/arm/mach-rockchip/Kconfig        |  2 ++
 arch/arm/mach-rockchip/rk3399/Kconfig | 10 ++++++++++
 include/configs/rk3399_common.h       |  5 ++++-
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
index f5a80b4f0c..f3e4d72203 100644
--- a/arch/arm/mach-rockchip/Kconfig
+++ b/arch/arm/mach-rockchip/Kconfig
@@ -197,6 +197,8 @@ config ROCKCHIP_RK3399
 	imply TPL_CLK
 	imply TPL_TINY_MEMSET
 	imply TPL_ROCKCHIP_COMMON_BOARD
+	imply SYS_BOOTCOUNT_SINGLEWORD if BOOTCOUNT_LIMIT
+	imply CMD_BOOTCOUNT if BOOTCOUNT_LIMIT
 	help
 	  The Rockchip RK3399 is a ARM-based SoC with a dual-core Cortex-A72
 	  and quad-core Cortex-A53.
diff --git a/arch/arm/mach-rockchip/rk3399/Kconfig b/arch/arm/mach-rockchip/rk3399/Kconfig
index 6660d05349..68ac913bcb 100644
--- a/arch/arm/mach-rockchip/rk3399/Kconfig
+++ b/arch/arm/mach-rockchip/rk3399/Kconfig
@@ -91,6 +91,16 @@ config TPL_STACK
 config TPL_TEXT_BASE
         default 0xff8c2000
 
+if BOOTCOUNT_LIMIT
+
+config BOOTCOUNT_BOOTLIMIT
+	default 3
+
+config SYS_BOOTCOUNT_ADDR
+	default 0xff3100f0	# PMU_SYS_REG0
+
+endif # BOOTCOUNT_LIMIT
+
 source "board/rockchip/evb_rk3399/Kconfig"
 source "board/theobroma-systems/puma_rk3399/Kconfig"
 source "board/vamrs/rock960_rk3399/Kconfig"
diff --git a/include/configs/rk3399_common.h b/include/configs/rk3399_common.h
index a5e69b26ad..724ea4cbfc 100644
--- a/include/configs/rk3399_common.h
+++ b/include/configs/rk3399_common.h
@@ -64,7 +64,10 @@
 	"fdtfile=" CONFIG_DEFAULT_FDT_FILE "\0" \
 	"partitions=" PARTS_DEFAULT \
 	ROCKCHIP_DEVICE_SETTINGS \
-	BOOTENV
+	BOOTENV \
+	"altbootcmd=" \
+		"setenv boot_syslinux_conf extlinux/extlinux-rollback.conf;" \
+		"run distro_bootcmd\0"
 
 #endif
 
-- 
2.18.0.321.gffc6fa0e3