linux-kernel - [PATCH v2] arm64: dts: ti: k3-j721e-mcu-wakeup: Add MCU domain ESM instance

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Message-ID: <20230926142810.602384-1-n-francis@ti.com>
Date:   Tue, 26 Sep 2023 19:58:10 +0530
From:   Neha Malcom Francis <n-francis@...com>
To:     <robh+dt@...nel.org>, <conor+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>,
        <n-francis@...com>, <u-kumar1@...com>
Subject: [PATCH v2] arm64: dts: ti: k3-j721e-mcu-wakeup: Add MCU domain ESM instance

Currently J721E defines only the main_esm in DTS. Add node for mcu_esm
as well.

According to J721E TRM (12.11.2.2 ESM Environment) [1], we see that the
interrupt line from ESMi (main_esm) is routed to MCU_ESM (mcu_esm). This
is MCU_ESM0_LVL_IN_95 with interrupt ID 95. Configure mcu_esm
accordingly so that errors from main_esm are routed to mcu_esm and
handled.

[1] https://www.ti.com/lit/zip/spruil1

Signed-off-by: Neha Malcom Francis <n-francis@...com>
Reviewed-by: Udit Kumar <u-kumar1@...com>
---
Changes since v1:
	- Udit:
		- expanded on commit message

 arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
index 05d6ef127ba7..fa8af20c7818 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
@@ -671,4 +671,11 @@ wkup_vtm0: temperature-sensor@...40000 {
 		power-domains = <&k3_pds 154 TI_SCI_PD_EXCLUSIVE>;
 		#thermal-sensor-cells = <1>;
 	};
+
+	mcu_esm: esm@...00000 {
+		compatible = "ti,j721e-esm";
+		reg = <0x00 0x40800000 0x00 0x1000>;
+		ti,esm-pins = <95>;
+		bootph-pre-ram;
+	};
 };
-- 
2.34.1