From:   Nishanth Menon <nm@ti.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Rob Herring <robh+dt@kernel.org>
CC:     <linux-kernel@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        Tero Kristo <kristo@kernel.org>,
        Vignesh Raghavendra <vigneshr@ti.com>,
        Nishanth Menon <nm@ti.com>, Julien Panis <jpanis@baylibre.com>
Subject: [PATCH V2 2/2] arm64: dts: ti: k3-am62: Add watchdog nodes
Date:   Wed, 15 Mar 2023 12:07:06 -0500
Message-ID: <20230315170706.1598977-3-nm@ti.com>
In-Reply-To: <20230315170706.1598977-1-nm@ti.com>
References: <20230315170706.1598977-1-nm@ti.com>
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From: Julien Panis <jpanis@baylibre.com>

Add nodes for watchdogs :
- 5 in main domain
- 1 in MCU domain
- 1 in wakeup domain

Signed-off-by: Julien Panis <jpanis@baylibre.com>
Signed-off-by: Nishanth Menon <nm@ti.com>
---
Changes since V1:
   - On attempting to bring up MCU M4F, we realized that MCU RTI is
     tightly coupled with M4F and this instance is meant to be
     operated by MCU M4F. So, mark it as reserved by default, there
     is no generic case where A53 benefits with MCU RTI.

V1: https://lore.kernel.org/r/20230311105850.21811-3-nm@ti.com

 arch/arm64/boot/dts/ti/k3-am62-main.dtsi   | 45 ++++++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi    | 11 ++++++
 arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi | 11 ++++++
 3 files changed, 67 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
index ea683fd77d6a..90d5f145de4f 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi
@@ -758,6 +758,51 @@ main_mcan0: can@20701000 {
 		status = "disabled";
 	};
 
+	main_rti0: watchdog@e000000 {
+		compatible = "ti,j7-rti-wdt";
+		reg = <0x00 0x0e000000 0x00 0x100>;
+		clocks = <&k3_clks 125 0>;
+		power-domains = <&k3_pds 125 TI_SCI_PD_EXCLUSIVE>;
+		assigned-clocks = <&k3_clks 125 0>;
+		assigned-clock-parents = <&k3_clks 125 2>;
+	};
+
+	main_rti1: watchdog@e010000 {
+		compatible = "ti,j7-rti-wdt";
+		reg = <0x00 0x0e010000 0x00 0x100>;
+		clocks = <&k3_clks 126 0>;
+		power-domains = <&k3_pds 126 TI_SCI_PD_EXCLUSIVE>;
+		assigned-clocks = <&k3_clks 126 0>;
+		assigned-clock-parents = <&k3_clks 126 2>;
+	};
+
+	main_rti2: watchdog@e020000 {
+		compatible = "ti,j7-rti-wdt";
+		reg = <0x00 0x0e020000 0x00 0x100>;
+		clocks = <&k3_clks 127 0>;
+		power-domains = <&k3_pds 127 TI_SCI_PD_EXCLUSIVE>;
+		assigned-clocks = <&k3_clks 127 0>;
+		assigned-clock-parents = <&k3_clks 127 2>;
+	};
+
+	main_rti3: watchdog@e030000 {
+		compatible = "ti,j7-rti-wdt";
+		reg = <0x00 0x0e030000 0x00 0x100>;
+		clocks = <&k3_clks 128 0>;
+		power-domains = <&k3_pds 128 TI_SCI_PD_EXCLUSIVE>;
+		assigned-clocks = <&k3_clks 128 0>;
+		assigned-clock-parents = <&k3_clks 128 2>;
+	};
+
+	main_rti4: watchdog@e0f0000 {
+		compatible = "ti,j7-rti-wdt";
+		reg = <0x00 0x0e0f0000 0x00 0x100>;
+		clocks = <&k3_clks 130 0>;
+		power-domains = <&k3_pds 130 TI_SCI_PD_EXCLUSIVE>;
+		assigned-clocks = <&k3_clks 130 0>;
+		assigned-clock-parents = <&k3_clks 130 2>;
+	};
+
 	epwm0: pwm@23000000 {
 		compatible = "ti,am64-epwm", "ti,am3352-ehrpwm";
 		#pwm-cells = <3>;
diff --git a/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi
index a427231527c3..076601a41e84 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-mcu.dtsi
@@ -130,4 +130,15 @@ mcu_gpio0: gpio@4201000 {
 		clocks = <&k3_clks 79 0>;
 		clock-names = "gpio";
 	};
+
+	mcu_rti0: watchdog@4880000 {
+		compatible = "ti,j7-rti-wdt";
+		reg = <0x00 0x04880000 0x00 0x100>;
+		clocks = <&k3_clks 131 0>;
+		power-domains = <&k3_pds 131 TI_SCI_PD_EXCLUSIVE>;
+		assigned-clocks = <&k3_clks 131 0>;
+		assigned-clock-parents = <&k3_clks 131 2>;
+		/* Tightly coupled to M4F */
+		status = "reserved";
+	};
 };
diff --git a/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi
index fec81546fbbd..7726ebae2539 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62-wakeup.dtsi
@@ -50,4 +50,15 @@ wkup_rtc0: rtc@2b1f0000 {
 		power-domains = <&k3_pds 117 TI_SCI_PD_EXCLUSIVE>;
 		wakeup-source;
 	};
+
+	wkup_rti0: watchdog@2b000000 {
+		compatible = "ti,j7-rti-wdt";
+		reg = <0x00 0x2b000000 0x00 0x100>;
+		clocks = <&k3_clks 132 0>;
+		power-domains = <&k3_pds 132 TI_SCI_PD_EXCLUSIVE>;
+		assigned-clocks = <&k3_clks 132 0>;
+		assigned-clock-parents = <&k3_clks 132 2>;
+		/* Used by DM firmware */
+		status = "reserved";
+	};
 };
-- 
2.40.0