Add power device (battery + power-off) to lilygo-tdeck-max (#553)

2026-07-09 16:55:14 -04:00
parent 1c2806bddf
commit 16a61a087c
4 changed files with 191 additions and 1 deletions
@@ -0,0 +1,42 @@
+#pragma once
+
+#include "Tactility/hal/power/PowerDevice.h"
+
+#include <Bq27220.h>
+#include <tactility/device.h>
+
+#include <memory>
+
+using tt::hal::power::PowerDevice;
+
+// Power device for the LilyGO T-Deck Max. Battery metrics come from the BQ27220
+// fuel gauge (I2C 0x55); charging status, charge control and power-off (ship
+// mode, REG09 BATFET_DIS) use the SY6970 charger. Newer T-Deck Max revisions
+// ship the SY6970 (0x6A) instead of the older BQ25896 (0x6B); this board has
+// the SY6970 (confirmed by I2C scan). The two are register-compatible for
+// everything used here.
+class TdeckmaxPower final : public PowerDevice {
+    std::shared_ptr<Bq27220> gauge;
+    ::Device* i2c; // i2c0 controller, used to reach the SY6970 charger
+
+    bool configureCharger() const;
+
+public:
+
+    TdeckmaxPower(const std::shared_ptr<Bq27220>& gauge, ::Device* i2c) : gauge(gauge), i2c(i2c) {
+        configureCharger();
+    }
+
+    std::string getName() const final { return "T-Deck Max Power"; }
+    std::string getDescription() const final { return "Battery metrics (BQ27220), SY6970 charging and power-off"; }
+
+    bool supportsMetric(MetricType type) const override;
+    bool getMetric(MetricType type, MetricData& data) override;
+
+    bool supportsChargeControl() const override { return true; }
+    bool isAllowedToCharge() const override;
+    void setAllowedToCharge(bool canCharge) override;
+
+    bool supportsPowerOff() const override { return true; }
+    void powerOff() override;
+};