From: Michal Simek <michal.simek@xilinx.com>
Date: Thu, 19 Apr 2018 13:43:50 +0000 (+0200)
Subject: arm64: zynqmp: Enable cadence WDT for zcu100
X-Git-Tag: v2018.07-rc1~159^2~16
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=767afebbcda59f3ccb04f6c94de8cab2fb7905b6;p=platform%2Fkernel%2Fu-boot.git

arm64: zynqmp: Enable cadence WDT for zcu100

Enable watchdog on zcu100 to make sure if there is a bug in the u-boot
there is proper reset.
Watchdog expires and PMU fw is informed and based on setting proper
action is taken.

The patch is enabling reset-on-timeout feature and also fixing fixed
clock rate for watchdog where 100MHz is max (and also default) clock value.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

diff --git a/arch/arm/dts/zynqmp-clk.dtsi b/arch/arm/dts/zynqmp-clk.dtsi
index a8664e8..a795efd 100644
--- a/arch/arm/dts/zynqmp-clk.dtsi
+++ b/arch/arm/dts/zynqmp-clk.dtsi
@@ -219,7 +219,7 @@
 };
 
 &watchdog0 {
-	clocks = <&clk250>;
+	clocks = <&clk100>;
 };
 
 &xilinx_drm {
diff --git a/arch/arm/dts/zynqmp-zcu100-revC.dts b/arch/arm/dts/zynqmp-zcu100-revC.dts
index 9114f98..bcd9c39 100644
--- a/arch/arm/dts/zynqmp-zcu100-revC.dts
+++ b/arch/arm/dts/zynqmp-zcu100-revC.dts
@@ -332,6 +332,7 @@
 
 &watchdog0 {
 	status = "okay";
+	reset-on-timeout;
 };
 
 &xilinx_ams {
diff --git a/configs/xilinx_zynqmp_zcu100_revC_defconfig b/configs/xilinx_zynqmp_zcu100_revC_defconfig
index 87b7941..1625ef3 100644
--- a/configs/xilinx_zynqmp_zcu100_revC_defconfig
+++ b/configs/xilinx_zynqmp_zcu100_revC_defconfig
@@ -80,5 +80,7 @@ CONFIG_USB_ULPI=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_DOWNLOAD=y
+CONFIG_WDT=y
+CONFIG_WDT_CDNS=y
 CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_EFI_LOADER_BOUNCE_BUFFER=y