New kernel drivers and device migrations (#563)

Devices/unphone/source/BatteryManager.cpp

@@ -0,0 +1,72 @@
+#include "BatteryManager.h"
+
+#include <tactility/check.h>
+#include <tactility/device.h>
+#include <tactility/drivers/backlight.h>
+#include <tactility/drivers/gpio.h>
+#include <tactility/drivers/gpio_controller.h>
+#include <tactility/log.h>
+
+#include <drivers/bq24295.h>
+
+constexpr auto* TAG = "unPhoneFeatures";
+
+namespace expanderpin {
+    static constexpr gpio_pin_t EXPANDER_POWER = 0; // enable exp brd if high
+}
+
+bool BatteryManager::initGpioExpander() {
+    if (device_get_by_name("tca9535", &expander) != ERROR_NONE) {
+        LOG_E(TAG, "IO expander device not found");
+        return false;
+    }
+
+    expanderPowerPin = gpio_descriptor_acquire(expander, expanderpin::EXPANDER_POWER, GPIO_OWNER_GPIO);
+    check(expanderPowerPin != nullptr);
+    gpio_descriptor_set_flags(expanderPowerPin, GPIO_FLAG_DIRECTION_OUTPUT);
+
+    device_put(expander);
+
+    return true;
+}
+
+bool BatteryManager::init() {
+    LOG_I(TAG, "init");
+
+    if (!initGpioExpander()) {
+        LOG_E(TAG, "GPIO expander init failed");
+        return false;
+    }
+
+    return true;
+}
+
+bool BatteryManager::setExpanderPower(bool on) const {
+    return gpio_descriptor_set_level(expanderPowerPin, on) == ERROR_NONE;
+}
+
+void BatteryManager::turnPeripheralsOff() const {
+    setExpanderPower(false);
+
+    Device* backlight = nullptr;
+    check(device_get_by_name("display_backlight", &backlight) == ERROR_NONE);
+    backlight_set_brightness(backlight, 0); // Allowed to fail, we don't care about the result
+    device_put(backlight);
+}
+
+void BatteryManager::setShipping(bool on) const {
+    if (on) {
+        LOG_W(TAG, "setShipping: on");
+        bq24295_set_watchdog_timer(batteryManagement, BQ24295_WATCHDOG_DISABLED);
+        bq24295_set_bat_fet_on(batteryManagement, false);
+    } else {
+        LOG_W(TAG, "setShipping: off");
+        bq24295_set_watchdog_timer(batteryManagement, BQ24295_WATCHDOG_ENABLED_40S);
+        bq24295_set_bat_fet_on(batteryManagement, true);
+    }
+}
+
+bool BatteryManager::isUsbPowerConnected() const {
+    bool connected = false;
+    return bq24295_is_usb_power_connected(batteryManagement, &connected) == ERROR_NONE && connected;
+}