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arm64: zynqmp: Enable cadence WDT for zcu100

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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>
This commit is contained in:
Michal Simek 2018-04-19 15:43:50 +02:00
parent 4490e013ee
commit 767afebbcd
3 changed files with 4 additions and 1 deletions
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2
arch/arm/dts/zynqmp-clk.dtsi
View file

@ -219,7 +219,7 @@
};
&watchdog0 {
clocks = <&clk250>;
clocks = <&clk100>;
};
&xilinx_drm {

1
arch/arm/dts/zynqmp-zcu100-revC.dts
View file

@ -332,6 +332,7 @@
&watchdog0 {
status = "okay";
reset-on-timeout;
};
&xilinx_ams {

2
configs/xilinx_zynqmp_zcu100_revC_defconfig
View file

@ -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