1 files changed, 135 insertions, 0 deletions
diff --git a/board/kodama/led.c b/board/kodama/led.c
new file mode 100644
index 0000000000..930415108c
--- /dev/null
+++ b/board/kodama/led.c
@@ -0,0 +1,135 @@
+/* Copyright 2019 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Battery LED control for Kukui board.
+ */
+
+#include "battery.h"
+#include "charge_state.h"
+#include "driver/charger/rt946x.h"
+#include "hooks.h"
+#include "led_common.h"
+
+const enum ec_led_id supported_led_ids[] = { EC_LED_ID_BATTERY_LED };
+
+const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
+
+static enum charge_state prv_chstate = PWR_STATE_INIT;
+
+#define LED_OFF		MT6370_LED_ID_OFF
+#define LED_RED		MT6370_LED_ID1
+#define LED_GREEN	MT6370_LED_ID2
+#define LED_BLUE	MT6370_LED_ID3
+
+#define LED_MASK_OFF	0
+#define LED_MASK_RED	MT6370_MASK_RGB_ISNK1DIM_EN
+#define LED_MASK_GREEN	MT6370_MASK_RGB_ISNK2DIM_EN
+#define LED_MASK_BLUE	MT6370_MASK_RGB_ISNK3DIM_EN
+
+static void kukui_led_set_battery(void)
+{
+	enum charge_state chstate;
+	uint8_t br[EC_LED_COLOR_COUNT] = { 0 };
+
+	chstate = charge_get_state();
+
+	if (prv_chstate == chstate)
+		return;
+
+	prv_chstate = chstate;
+
+	switch (chstate) {
+	case PWR_STATE_CHARGE:
+		/* Always indicate when charging, even in suspend. */
+		br[EC_LED_COLOR_BLUE] = 1;
+		break;
+	case PWR_STATE_DISCHARGE:
+		if (charge_get_percent() <= 10)
+			br[EC_LED_COLOR_RED] = 1;
+		break;
+	case PWR_STATE_ERROR:
+		br[EC_LED_COLOR_RED] = 1;
+		break;
+	case PWR_STATE_CHARGE_NEAR_FULL:
+		br[EC_LED_COLOR_GREEN] = 1;
+		break;
+	default:
+		/* Other states don't alter LED behavior */
+		return;
+	}
+
+	led_set_brightness(EC_LED_ID_BATTERY_LED, br);
+}
+
+void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
+{
+	if (led_id != EC_LED_ID_BATTERY_LED)
+		return;
+
+	brightness_range[EC_LED_COLOR_RED] = MT6370_LED_BRIGHTNESS_MAX;
+	brightness_range[EC_LED_COLOR_GREEN] = MT6370_LED_BRIGHTNESS_MAX;
+	brightness_range[EC_LED_COLOR_BLUE] = MT6370_LED_BRIGHTNESS_MAX;
+}
+
+int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
+{
+	uint8_t red, green, blue;
+
+	if (led_id != EC_LED_ID_BATTERY_LED)
+		return EC_ERROR_INVAL;
+
+	red = brightness[EC_LED_COLOR_RED];
+	green = brightness[EC_LED_COLOR_GREEN];
+	blue = brightness[EC_LED_COLOR_BLUE];
+
+	mt6370_led_set_brightness(LED_RED, red);
+	mt6370_led_set_brightness(LED_GREEN, green);
+	mt6370_led_set_brightness(LED_BLUE, blue);
+
+	/* Enables LED sink power if necessary. */
+	mt6370_led_set_color((red ? LED_MASK_RED : 0) |
+			     (blue ? LED_MASK_BLUE : 0) |
+			     (green ? LED_MASK_GREEN : 0));
+	return EC_SUCCESS;
+}
+
+/*
+ * Reset prv_chstate so that led can be updated immediately once
+ * auto-controlled.
+ */
+static void led_reset_auto_control(void)
+{
+	prv_chstate = PWR_STATE_INIT;
+}
+
+/* Called by hook task every 1 sec */
+static void led_second(void)
+{
+	if (led_auto_control_is_enabled(EC_LED_ID_BATTERY_LED))
+		kukui_led_set_battery();
+	else
+		led_reset_auto_control();
+}
+DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT);
+
+__override void led_control(enum ec_led_id led_id, enum ec_led_state state)
+{
+	uint8_t br[EC_LED_COLOR_COUNT] = { 0 };
+
+	if ((led_id != EC_LED_ID_RECOVERY_HW_REINIT_LED) &&
+	    (led_id != EC_LED_ID_SYSRQ_DEBUG_LED))
+		return;
+
+	if (state == LED_STATE_RESET) {
+		led_reset_auto_control();
+		led_auto_control(EC_LED_ID_BATTERY_LED, 1);
+		return;
+	}
+
+	if (state)
+		br[EC_LED_COLOR_GREEN] = 1;
+
+	led_auto_control(EC_LED_ID_BATTERY_LED, 0);
+	led_set_brightness(EC_LED_ID_BATTERY_LED, br);
+}