[PATCH v3 3/3] arm64: dts: qcom: lemans: Add PSCRR NVMEM recorder node

[Faruque Ansari]

The PSCRR NVMEM recorder needs a persistent storage cell to save the
power state change reason before shutdown or reset. Without a described
NVMEM cell, the recorder has no platform storage where it can preserve
that reason for the next boot.

Add a pscrr-nvmem layout under the PMIC SDAM and describe a one-byte
cell at offset 0x49. The recorder uses the lower four bits of this cell
to persist the power state change reason across resets.
---
 arch/arm64/boot/dts/qcom/lemans-pmics.dtsi | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/lemans-pmics.dtsi b/arch/arm64/boot/dts/qcom/lemans-pmics.dtsi
index 500f715931aa..180d180be3c6 100644
--- a/arch/arm64/boot/dts/qcom/lemans-pmics.dtsi
+++ b/arch/arm64/boot/dts/qcom/lemans-pmics.dtsi
@@ -186,6 +186,17 @@ reboot_reason: reboot-reason@48 {
 				reg = <0x48 0x1>;
 				bits = <1 7>;
 			};
+
+			nvmem-layout {
+				compatible = "pscrr-nvmem";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				reboot_reason_persist: reboot-reason-persist@49 {
+					reg = <0x49 0x1>;
+					bits = <0 4>;
+				};
+			};
 		};
 	};
 

-- 
2.34.1