linux-kernel - [PATCH] arm64: dts: ti: k3-am65-mcu: Add RTI watchdog entry

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Message-ID: <279c20fa-6e5e-4f88-9cd1-f76297a28a19@web.de>
Date:   Sat, 20 Feb 2021 13:49:51 +0100
From:   Jan Kiszka <jan.kiszka@....de>
To:     Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH] arm64: dts: ti: k3-am65-mcu: Add RTI watchdog entry

From: Jan Kiszka <jan.kiszka@...mens.com>

Add the DT entry for a watchdog based on RTI1.

On SR1.0 silicon, it requires additional firmware on the MCU R5F cores
to handle the expiry, e.g. https://github.com/siemens/k3-rti-wdt. As
this firmware will also lock the power domain to protect it against
premature shutdown, mark it shared.

Signed-off-by: Jan Kiszka <jan.kiszka@...mens.com>
---
 arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
index 7454c8cec0cc..903796bf7d64 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
@@ -308,4 +308,13 @@ mcu_r5fss0_core1: r5f@...00000 {
 			ti,loczrama = <1>;
 		};
 	};
+
+	mcu_rti1: rti@...10000 {
+		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>;
+	};
 };
--
2.26.2