linux-kernel - [PATCH] arm64: dts: ti: k3-am62p-mcu/wakeup: Disable MCU and wakeup R5FSS nodes

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Date: Sun, 21 Jan 2024 19:10:17 +0530
From: Vaishnav Achath <vaishnav.a@...com>
To: <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>
CC: <bb@...com>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <u-kumar1@...com>, <vaishnav.a@...com>
Subject: [PATCH] arm64: dts: ti: k3-am62p-mcu/wakeup: Disable MCU and wakeup R5FSS nodes

K3 Remoteproc R5 driver requires reserved memory carveouts and
mailbox configuration to instantiate the cores successfully.
Since this is a board level dependency, keep the R5 subsytem
disabled at SoC dtsi, otherwise it results in probe errors like
below during AM62P SK boot:

r5fss@...00000: reserved memory init failed, ret = -22
r5fss@...00000: k3_r5_cluster_rproc_init failed, ret = -22
r5fss@...00000: reserved memory init failed, ret = -22
r5fss@...00000: k3_r5_cluster_rproc_init failed, ret = -22

Fixes: b5080c7c1f7e ("arm64: dts: ti: k3-am62p: Add nodes for more IPs")

Signed-off-by: Vaishnav Achath <vaishnav.a@...com>
---
 arch/arm64/boot/dts/ti/k3-am62p-mcu.dtsi    | 2 ++
 arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi | 1 +
 2 files changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am62p-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-mcu.dtsi
index c4b0b91d70cf..14eb9ba836d3 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p-mcu.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62p-mcu.dtsi
@@ -187,6 +187,8 @@ mcu_r5fss0: r5fss@...00000 {
 		ranges = <0x79000000 0x00 0x79000000 0x8000>,
 			 <0x79020000 0x00 0x79020000 0x8000>;
 		power-domains = <&k3_pds 7 TI_SCI_PD_EXCLUSIVE>;
+		status = "disabled";
+
 		mcu_r5fss0_core0: r5f@...00000 {
 			compatible = "ti,am62-r5f";
 			reg = <0x79000000 0x00008000>,
diff --git a/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi
index 19f42b39394e..10a7059b2d9b 100644
--- a/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62p-wakeup.dtsi
@@ -78,6 +78,7 @@ wkup_r5fss0: r5fss@...00000 {
 		ranges = <0x78000000 0x00 0x78000000 0x8000>,
 			 <0x78100000 0x00 0x78100000 0x8000>;
 		power-domains = <&k3_pds 119 TI_SCI_PD_EXCLUSIVE>;
+		status = "disabled";
 
 		wkup_r5fss0_core0: r5f@...00000 {
 			compatible = "ti,am62-r5f";
-- 
2.34.1