[PATCH v3] arm64: dts: qcom: sdm845-sony-tama: Add battery properties

Add simple-battery nodes describing the design capacity and voltage
limits of the Xperia TAMA batteries.

Use the TMM fuel-gauge profile values from the downstream kernel
(`somc,initial-capacity-uah` and `qcom,max-voltage-uv` on the 4250 mV
bins). Akari also shipped a BYD cell (3056000 uAh); a single
simple-battery node cannot express both, so prefer TMM as on the other
TAMA devices.

Voltage limits match the fresh 4250 mV profiles: 3.4 V drained and
4.245 V fully charged. Aging bins raise max voltage / CC-CV up to
4.380 V / 4370 mV and are not modelled here.

Signed-off-by: Shujath Mohd <redacted>
---
Changes in v3:
- Document TMM vs BYD dual-supplier situation in Akari
- Set charge-full design from downstream TMM initial capacities (akari 3217000, apollo 2899000, akatsuki 3325000 uAh)
- Explain voltage limits vs aging/CC-CV bins

Changes in v2:
- Retitle subject to include "tama" (commit message only) 

 arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akari.dts | 7 +++++++
 .../boot/dts/qcom/sdm845-sony-xperia-tama-akatsuki.dts     | 7 +++++++
 .../arm64/boot/dts/qcom/sdm845-sony-xperia-tama-apollo.dts | 7 +++++++
 3 files changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akari.dts b/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akari.dts
index 6e65909ab582..c76708ad537b 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akari.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akari.dts

@@ -10,6 +10,13 @@
 / {
 	model = "Sony Xperia XZ2";
 	compatible = "sony,akari-row", "qcom,sdm845";
+
+	battery: battery {
+		compatible = "simple-battery";
+		charge-full-design-microamp-hours = <3217000>;
+		voltage-min-design-microvolt = <3400000>;
+		voltage-max-design-microvolt = <4245000>;
+	};
 };
 
 &panel {

diff --git a/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akatsuki.dts b/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akatsuki.dts
index 82e59e453354..87279392f7eb 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akatsuki.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-akatsuki.dts

@@ -26,6 +26,13 @@ ts_vddio_supply: ts-vddio-regulator {
 		enable-active-high;
 		regulator-boot-on;
 	};
+
+	battery: battery {
+		compatible = "simple-battery";
+		charge-full-design-microamp-hours = <3325000>;
+		voltage-min-design-microvolt = <3400000>;
+		voltage-max-design-microvolt = <4245000>;
+	};
 };
 
 &ibb {

diff --git a/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-apollo.dts b/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-apollo.dts
index dc15ab1a2716..08c0837d7e5e 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-apollo.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-sony-xperia-tama-apollo.dts

@@ -10,6 +10,13 @@
 / {
 	model = "Sony Xperia XZ2 Compact";
 	compatible = "sony,apollo-row", "qcom,sdm845";
+
+	battery: battery {
+		compatible = "simple-battery";
+		charge-full-design-microamp-hours = <2899000>;
+		voltage-min-design-microvolt = <3400000>;
+		voltage-max-design-microvolt = <4245000>;
+	};
 };
 
 &panel {

-- 
2.55.0