1 files changed, 88 insertions, 0 deletions
diff --git a/keyboards/keychron/bluetooth/lpm.c b/keyboards/keychron/bluetooth/lpm.c
new file mode 100644
index 0000000000..84f629a672
--- /dev/null
+++ b/keyboards/keychron/bluetooth/lpm.c
@@ -0,0 +1,88 @@
+/* Copyright 2022 @ lokher (https://www.keychron.com)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/******************************************************************************
+ *
+ *  Filename:      lpm.c
+ *
+ *  Description:   Contains low power mode implementation
+ *
+ ******************************************************************************/
+
+#include "quantum.h"
+#if defined(PROTOCOL_CHIBIOS)
+#    include <usb_main.h>
+#endif
+#include "bluetooth.h"
+#include "indicator.h"
+#include "lpm.h"
+#include "transport.h"
+#include "battery.h"
+
+extern matrix_row_t          matrix[MATRIX_ROWS];
+extern bluetooth_transport_t bluetooth_transport;
+
+static uint32_t     lpm_timer_buffer;
+static bool         lpm_time_up               = false;
+static matrix_row_t empty_matrix[MATRIX_ROWS] = {0};
+
+void lpm_init(void) {
+#ifdef USB_POWER_SENSE_PIN
+    setPinInputHigh(USB_POWER_SENSE_PIN);
+#endif
+    lpm_timer_reset();
+}
+
+inline void lpm_timer_reset(void) {
+    lpm_time_up      = false;
+    lpm_timer_buffer = sync_timer_read32();
+}
+
+void lpm_timer_stop(void) {
+    lpm_time_up      = false;
+    lpm_timer_buffer = 0;
+}
+
+static inline bool lpm_any_matrix_action(void) { return memcmp(matrix, empty_matrix, sizeof(empty_matrix)); }
+
+/* Implement of entering low power mode and wakeup varies per mcu or platform */
+__attribute__((weak)) void enter_power_mode(pm_t mode) {}
+
+__attribute__((weak)) bool usb_power_connected(void) {
+#ifdef USB_POWER_SENSE_PIN
+    return readPin(USB_POWER_SENSE_PIN) == USB_POWER_CONNECTED_LEVEL;
+#endif
+
+    return true;
+}
+
+void lpm_task(void) {
+    if (!lpm_time_up && sync_timer_elapsed32(lpm_timer_buffer) > RUN_MODE_PROCESS_TIME) {
+        lpm_time_up      = true;
+        lpm_timer_buffer = 0;
+    }
+
+    if (get_transport() == TRANSPORT_BLUETOOTH && lpm_time_up && !indicator_is_running()
+#ifdef LED_MATRIX_ENABLE
+        && led_matrix_is_driver_shutdown()
+#endif
+#ifdef RGB_MATRIX_ENABLE
+        && rgb_matrix_is_driver_shutdown()
+#endif
+        && !lpm_any_matrix_action())
+
+        enter_power_mode(LOW_POWER_MODE);
+}