Re: [PATCH v2 5/7] arm64: dts: monaco-evk: Add reboot-mode support via PON/SDAM

[Sumit Garg <sumit.garg@kernel.org>]

On Wed, 12 Aug 2026 at 06:42:03 +0530, Balaji Selvanathan wrote:
>monaco-pmics.dtsi has no PON/SDAM reboot-reason storage, so
>U-Boot can't read the reboot-reason to tell if it should stop in
>fastboot instead of booting the kernel.
>
>Signed-off-by: Balaji Selvanathan <balaji.selvanathan@oss.qualcomm.com>
>---
> arch/arm/dts/monaco-evk-u-boot.dtsi | 36 ++++++++++++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)

Avoid adding DTS changes for targets that aren't yet accepted upstream.
Try to keep patch-sets independent such that they are easier to land.

-Sumit

>
>diff --git a/arch/arm/dts/monaco-evk-u-boot.dtsi b/arch/arm/dts/monaco-evk-u-boot.dtsi
>new file mode 100644
>index 00000000000..5520d111864
>--- /dev/null
>+++ b/arch/arm/dts/monaco-evk-u-boot.dtsi
>@@ -0,0 +1,36 @@
>+// SPDX-License-Identifier: BSD-3-Clause
>+/*
>+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
>+ */
>+
>+/ {
>+	reboot-mode {
>+		compatible = "nvmem-reboot-mode";
>+		nvmem-cells = <&reboot_reason>;
>+		nvmem-cell-names = "reboot-mode";
>+
>+		mode-bootloader = <0x02>;
>+		mode-recovery   = <0x01>;
>+	};
>+};
>+
>+&pmm8620au_0 {
>+	pmm8620au_0_pon: pon@1200 {
>+		compatible = "qcom,pmk8350-pon";
>+		reg = <0x1200>, <0x800>;
>+		reg-names = "hlos", "pbs";
>+	};
>+
>+	pmm8620au_0_sdam_0: nvram@7100 {
>+		compatible = "qcom,spmi-sdam";
>+		reg = <0x7100>;
>+		#address-cells = <1>;
>+		#size-cells = <1>;
>+		ranges = <0x0 0x7100 0x100>;
>+
>+		reboot_reason: reboot-reason@48 {
>+			reg = <0x48 0x1>;
>+			bits = <1 7>;
>+		};
>+	};
>+};
>
>-- 
>2.34.1
>