linux-kernel - [PATCH 2/2] arm64: dts: qcom: pmk8550: add reboot-mode node using sdam

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Message-Id: <20230503-topic-sm8450-upstream-reboot-reason-v1-2-c5ac3dd5b49f@linaro.org>
Date:   Wed, 03 May 2023 16:13:29 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Abel Vesa <abel.vesa@...aro.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH 2/2] arm64: dts: qcom: pmk8550: add reboot-mode node using
 sdam_2 nvmem

Introduce sdam_2 node, which is to be used via nvmem for power on
reasons during reboot. Add supported PoN reasons supported via sdam_2
node.

Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
---
 arch/arm64/boot/dts/qcom/pmk8550.dtsi | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/pmk8550.dtsi b/arch/arm64/boot/dts/qcom/pmk8550.dtsi
index 201efeda7d2d..8c897d4fee29 100644
--- a/arch/arm64/boot/dts/qcom/pmk8550.dtsi
+++ b/arch/arm64/boot/dts/qcom/pmk8550.dtsi
@@ -8,6 +8,16 @@
 #include <dt-bindings/interrupt-controller/irq.h>
 #include <dt-bindings/spmi/spmi.h>
 
+/ {
+	reboot-mode {
+		compatible = "nvmem-reboot-mode";
+		nvmem-cells = <&reboot_reason>;
+		nvmem-cell-names = "reboot-mode";
+		mode-recovery = <0x01>;
+		mode-bootloader = <0x02>;
+	};
+};
+
 &spmi_bus {
 	pmk8550: pmic@0 {
 		compatible = "qcom,pm8550", "qcom,spmi-pmic";
@@ -42,6 +52,19 @@ pmk8550_rtc: rtc@...0 {
 			status = "disabled";
 		};
 
+		pmk8550_sdam_2: nvram@...0 {
+			compatible = "qcom,spmi-sdam";
+			reg = <0x7100>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0 0x7100 0x100>;
+
+			reboot_reason: reboot-reason@48 {
+				reg = <0x48 0x1>;
+				bits = <1 7>;
+			};
+		};
+
 		pmk8550_gpios: gpio@...0 {
 			compatible = "qcom,pmk8550-gpio", "qcom,spmi-gpio";
 			reg = <0xb800>;

-- 
2.34.1