[PATCH] mx6cuboxi: Convert to watchdog driver model

[Fabio Estevam <festevam@gmail.com>]

Commit 68dcbdd594d4 ("ARM: imx: Add weak default reset_cpu()") caused
the 'reset' command in U-Boot to not cause a board reset.

Fix it by switching to the watchdog driver model via sysreset, which
is the preferred method for implementing the watchdog reset.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
---
Christian,

Can you test this, please?

 .../dts/imx6qdl-hummingboard2-emmc-som-v15-u-boot.dtsi | 10 ++++++++++
 configs/mx6cuboxi_defconfig                            |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/arch/arm/dts/imx6qdl-hummingboard2-emmc-som-v15-u-boot.dtsi b/arch/arm/dts/imx6qdl-hummingboard2-emmc-som-v15-u-boot.dtsi
index 23a05773b579..e9b188ed6587 100644
--- a/arch/arm/dts/imx6qdl-hummingboard2-emmc-som-v15-u-boot.dtsi
+++ b/arch/arm/dts/imx6qdl-hummingboard2-emmc-som-v15-u-boot.dtsi
@@ -13,6 +13,12 @@
 			&gpio6 4 0
 		>;
 	};
+
+	wdt-reboot {
+		compatible = "wdt-reboot";
+		wdt = <&wdog1>;
+		bootph-pre-ram;
+	};
 };
 
 &soc {
@@ -58,3 +64,7 @@
 &usdhc3 {
 	bootph-all;
 };
+
+&wdog1 {
+	bootph-pre-ram;
+};
diff --git a/configs/mx6cuboxi_defconfig b/configs/mx6cuboxi_defconfig
index 66d4aaeda2d9..27ceb22599a6 100644
--- a/configs/mx6cuboxi_defconfig
+++ b/configs/mx6cuboxi_defconfig
@@ -71,6 +71,8 @@ CONFIG_DM_REGULATOR=y
 CONFIG_DM_REGULATOR_FIXED=y
 CONFIG_DM_SERIAL=y
 CONFIG_MXC_UART=y
+CONFIG_SYSRESET=y
+CONFIG_SYSRESET_WATCHDOG=y
 CONFIG_DM_THERMAL=y
 CONFIG_IMX_THERMAL=y
 CONFIG_USB=y
@@ -89,3 +91,4 @@ CONFIG_IMX_HDMI=y
 CONFIG_SPLASH_SCREEN=y
 CONFIG_SPLASH_SCREEN_ALIGN=y
 CONFIG_BMP_16BPP=y
+CONFIG_IMX_WATCHDOG=y
-- 
2.34.1