Migrate devices, create drivers, other improvements & fixes (#574)

Migrated devices to kernel drivers:

- guition-jc3248w535c
- m5stack-core2
- m5stack-cores3
- m5stack-papers3

New drivers:

- axp192-module
- axp2101-module

Fixes:

- Fix SD card LDO for P4 devices
- Updated PowerOff app to work with kernel displays
- Fix for `lvgl_try_lock()` timing
- Fix for touch events with slow updating displays

Improvements:

- `GuiService` now keeps trying to lock to prevent silent failures caused by drivers.
- `GuiService` now uses lvgl-module calls for locking/unlocking
- display driver now has capability `DISPLAY_CAPABILITY_SLOW_REFRESH`

Drivers/axp192-module/include/drivers/axp192.h

@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <tactility/error.h>
+
+struct Device;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct Axp192Config {
+    /** Address on bus */
+    uint8_t address;
+};
+
+/** Switchable/adjustable power rails of the AXP192. */
+enum Axp192Rail {
+    AXP192_RAIL_DCDC1,
+    AXP192_RAIL_DCDC2,
+    AXP192_RAIL_DCDC3,
+    AXP192_RAIL_LDO2,
+    AXP192_RAIL_LDO3,
+    /** EXTEN output switch; does not support voltage control. */
+    AXP192_RAIL_EXTEN,
+};
+
+/**
+ * @brief Checks whether a power rail is currently enabled.
+ */
+error_t axp192_is_rail_enabled(struct Device* device, enum Axp192Rail rail, bool* enabled);
+
+/**
+ * @brief Enables or disables a power rail.
+ */
+error_t axp192_set_rail_enabled(struct Device* device, enum Axp192Rail rail, bool enabled);
+
+/**
+ * @brief Sets the output voltage of a power rail.
+ * @retval ERROR_NOT_SUPPORTED for AXP192_RAIL_EXTEN, which has no voltage control
+ * @retval ERROR_INVALID_ARGUMENT when millivolts is outside the rail's supported range
+ * (DCDC1/DCDC3: 700-3500mV, DCDC2: 700-2275mV, LDO2/LDO3: 1800-3300mV)
+ */
+error_t axp192_set_rail_voltage(struct Device* device, enum Axp192Rail rail, uint16_t millivolts);
+
+/** Battery voltage in millivolts. */
+error_t axp192_get_battery_voltage(struct Device* device, uint16_t* millivolts);
+
+/** Battery charge current in milliamps (0 when not charging). */
+error_t axp192_get_battery_charge_current(struct Device* device, uint16_t* milliamps);
+
+/** Battery discharge current in milliamps (0 when not discharging). */
+error_t axp192_get_battery_discharge_current(struct Device* device, uint16_t* milliamps);
+
+/** Battery power in microwatts. */
+error_t axp192_get_battery_power(struct Device* device, uint32_t* microwatts);
+
+/** Whether the battery is currently charging. */
+error_t axp192_is_charging(struct Device* device, bool* charging);
+
+/** Whether the charger is allowed to charge the battery. */
+error_t axp192_is_charge_enabled(struct Device* device, bool* enabled);
+
+/** Enables or disables battery charging. */
+error_t axp192_set_charge_enabled(struct Device* device, bool enabled);
+
+/** Powers off the system (does not return on success). */
+error_t axp192_power_off(struct Device* device);
+
+/** Configures GPIO1 as the PWM1 output (rather than GPIO/ADC input/output). */
+error_t axp192_set_gpio1_pwm1_output(struct Device* device);
+
+/** Sets the PWM1 duty cycle (0 = always low, 255 = always high). */
+error_t axp192_set_pwm1_duty_cycle(struct Device* device, uint8_t duty);
+
+#ifdef __cplusplus
+}
+#endif

Drivers/axp192-module/include/drivers/axp192_backlight.h

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <stdint.h>
+
+#include <drivers/axp192.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Devicetree configuration for a backlight driven by a switchable/adjustable AXP192 power rail.
+ */
+struct Axp192BacklightConfig {
+    /** The AXP192 rail powering the backlight */
+    enum Axp192Rail rail;
+    /** Rail voltage at brightness level 0. Brightness level 0 always disables the rail outright,
+     * rather than actually driving it to this voltage - see set_brightness() in BacklightApi. */
+    uint16_t min_millivolt;
+    /** Rail voltage at the maximum brightness level (255) */
+    uint16_t max_millivolt;
+    /** Default brightness level, applied by set_brightness_default() */
+    uint8_t brightness_default;
+};
+
+#ifdef __cplusplus
+}
+#endif