[PATCH] warp7: 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>
---
 arch/arm/dts/imx7s-warp-u-boot.dtsi | 10 ++++++++++
 configs/warp7_defconfig             |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/arch/arm/dts/imx7s-warp-u-boot.dtsi b/arch/arm/dts/imx7s-warp-u-boot.dtsi
index 4f44598c9a27..98784fd7a2ef 100644
--- a/arch/arm/dts/imx7s-warp-u-boot.dtsi
+++ b/arch/arm/dts/imx7s-warp-u-boot.dtsi
@@ -7,6 +7,12 @@
 	chosen {
 		stdout-path = &uart1;
 	};
+
+	wdt-reboot {
+		compatible = "wdt-reboot";
+		wdt = <&wdog1>;
+		bootph-pre-ram;
+	};
 };
 
 &aips3 {
@@ -24,3 +30,7 @@
 &uart1 {
 	bootph-all;
 };
+
+&wdog1 {
+	bootph-pre-ram;
+};
diff --git a/configs/warp7_defconfig b/configs/warp7_defconfig
index 9b518a121be6..48042b702c22 100644
--- a/configs/warp7_defconfig
+++ b/configs/warp7_defconfig
@@ -67,6 +67,8 @@ CONFIG_DM_REGULATOR_GPIO=y
 CONFIG_SPECIFY_CONSOLE_INDEX=y
 CONFIG_DM_SERIAL=y
 CONFIG_MXC_UART=y
+CONFIG_SYSRESET=y
+CONFIG_SYSRESET_WATCHDOG=y
 CONFIG_IMX_THERMAL=y
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
@@ -80,5 +82,6 @@ CONFIG_USB_GADGET_DOWNLOAD=y
 CONFIG_USB_ETHER=y
 CONFIG_USB_ETH_CDC=y
 CONFIG_USBNET_HOST_ADDR="de:ad:be:af:00:00"
+CONFIG_IMX_WATCHDOG=y
 CONFIG_OPTEE_TZDRAM_SIZE=0x3000000
 CONFIG_BOOTM_OPTEE=y
-- 
2.34.1