arm: dts: k3: Add RTI watchdogs

Add DT entries for main domain watchdog0 and 1 instances on the J721e
well as RTI1-based watchdog on the AM65x. RTI0 does not work for this
purpose on the AM65x, so leave it out.

On AM65x, we mark the power-domain as shared because RTI firmware such
as https://github.com/siemens/k3-rti-wdt may request it as well in order
to prevent accidental shutdown of the watchdog.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

diff --git a/arch/arm/dts/k3-am65-mcu.dtsi b/arch/arm/dts/k3-am65-mcu.dtsi
index 1355685..9717cae 100644 (file)
--- a/arch/arm/dts/k3-am65-mcu.dtsi
+++ b/arch/arm/dts/k3-am65-mcu.dtsi
@@ -230,4 +230,13 @@
                        };
                };
        };
+
+       mcu_rti1: rti@40610000 {
+               compatible = "ti,j7-rti-wdt";
+               reg = <0x0 0x40610000 0x0 0x100>;
+               clocks = <&k3_clks 135 0>;
+               power-domains = <&k3_pds 135 TI_SCI_PD_SHARED>;
+               assigned-clocks = <&k3_clks 135 0>;
+               assigned-clock-parents = <&k3_clks 135 4>;
+       };
 };

diff --git a/arch/arm/dts/k3-j721e-main.dtsi b/arch/arm/dts/k3-j721e-main.dtsi
index 1433932..a285b1a 100644 (file)
--- a/arch/arm/dts/k3-j721e-main.dtsi
+++ b/arch/arm/dts/k3-j721e-main.dtsi
@@ -543,4 +543,22 @@
                clocks = <&k3_clks 193 0>;
                power-domains = <&k3_pds 193 TI_SCI_PD_EXCLUSIVE>;
        };
+
+       watchdog0: watchdog@2200000 {
+               compatible = "ti,j7-rti-wdt";
+               reg = <0x0 0x2200000 0x0 0x100>;
+               clocks = <&k3_clks 252 1>;
+               power-domains = <&k3_pds 252 TI_SCI_PD_EXCLUSIVE>;
+               assigned-clocks = <&k3_clks 252 1>;
+               assigned-clock-parents = <&k3_clks 252 5>;
+       };
+
+       watchdog1: watchdog@2210000 {
+               compatible = "ti,j7-rti-wdt";
+               reg = <0x0 0x2210000 0x0 0x100>;
+               clocks = <&k3_clks 253 1>;
+               power-domains = <&k3_pds 253 TI_SCI_PD_EXCLUSIVE>;
+               assigned-clocks = <&k3_clks 253 1>;
+               assigned-clock-parents = <&k3_clks 253 5>;
+       };
 };