linux-kernel - [PATCH 1/2] arm64: dts: qcom: pmk8350: add reboot-mode node using sdam

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Message-Id: <20230503-topic-sm8450-upstream-reboot-reason-v1-1-c5ac3dd5b49f@linaro.org>
Date:   Wed, 03 May 2023 16:13:28 +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 1/2] arm64: dts: qcom: pmk8350: 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/pmk8350.dtsi | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/pmk8350.dtsi b/arch/arm64/boot/dts/qcom/pmk8350.dtsi
index f26fb7d32faf..bc6297e7253e 100644
--- a/arch/arm64/boot/dts/qcom/pmk8350.dtsi
+++ b/arch/arm64/boot/dts/qcom/pmk8350.dtsi
@@ -13,6 +13,16 @@
 	#define PMK8350_SID 0
 #endif
 
+/ {
+	reboot-mode {
+		compatible = "nvmem-reboot-mode";
+		nvmem-cells = <&reboot_reason>;
+		nvmem-cell-names = "reboot-mode";
+		mode-recovery = <0x01>;
+		mode-bootloader = <0x02>;
+	};
+};
+	
 &spmi_bus {
 	pmk8350: pmic@...8350_SID {
 		compatible = "qcom,pmk8350", "qcom,spmi-pmic";
@@ -66,6 +76,19 @@ pmk8350_rtc: rtc@...0 {
 			status = "disabled";
 		};
 
+		pmk8350_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>;
+			};
+		};
+
 		pmk8350_gpios: gpio@...0 {
 			compatible = "qcom,pmk8350-gpio", "qcom,spmi-gpio";
 			reg = <0xb000>;

-- 
2.34.1