kukui: Add LED behavior.

Add simple LED rules.
Charge: red
Discharge under 10 percent: blink red
Full: green
Idle: red or green breath.

BUG=b:80160408
TEST=none
BRANCH=none

Change-Id: I1d3a75dadb92e0dbf617a132990e3a0c4da66461
Signed-off-by: Yilun Lin <yllin@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1126748
Commit-Ready: Yilun Lin <yllin@chromium.org>
Tested-by: Yilun Lin <yllin@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>

1 files changed, 62 insertions, 4 deletions

diff --git a/board/kukui/led.c b/board/kukui/led.c
index 68e7570303..2b6c19a07e 100644
--- a/board/kukui/led.c
+++ b/board/kukui/led.c
@@ -6,28 +6,86 @@
  *TODO(b:80160408): Implement mt6370 led driver.
  */
 
+#include "battery.h"
+#include "charge_state.h"
+#include "driver/charger/rt946x.h"
 #include "hooks.h"
 #include "led_common.h"
 
-/* LEDs on Kukui are active low. */
-#define BAT_LED_ON 0
-#define BAT_LED_OFF 1
-
 const enum ec_led_id supported_led_ids[] = { EC_LED_ID_BATTERY_LED };
 
 const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
 
+#define LED_OFF		MT6370_LED_ID_OFF
+#define LED_GREEN	MT6370_LED_ID1
+#define LED_RED		MT6370_LED_ID2
+
+static void kukui_led_set_battery(void)
+{
+	static int battery_second;
+	uint32_t chflags = charge_get_flags();
+
+	battery_second++;
+
+	switch (charge_get_state()) {
+	case PWR_STATE_CHARGE:
+		/* Always indicate when charging, even in suspend. */
+		mt6370_led_set_color(LED_RED);
+		break;
+	case PWR_STATE_DISCHARGE:
+		if (charge_get_percent() <= 10)
+			mt6370_led_set_color(
+			   (battery_second & 0x4) ? LED_RED : LED_OFF);
+		else
+			mt6370_led_set_color(LED_OFF);
+		break;
+	case PWR_STATE_ERROR:
+		mt6370_led_set_color((battery_second & 0x2) ?
+				LED_RED : LED_OFF);
+		break;
+	case PWR_STATE_CHARGE_NEAR_FULL:
+		mt6370_led_set_color(LED_GREEN);
+		break;
+	case PWR_STATE_IDLE: /* External power connected in IDLE. */
+		if (chflags & CHARGE_FLAG_FORCE_IDLE) {
+			mt6370_led_set_color(LED_RED);
+			mt6370_led_set_dim_mode(LED_RED,
+						MT6370_LED_DIM_MODE_BREATH);
+		} else {
+			mt6370_led_set_color(LED_GREEN);
+			mt6370_led_set_dim_mode(LED_GREEN,
+						MT6370_LED_DIM_MODE_BREATH);
+		}
+		break;
+	default:
+		/* Other states don't alter LED behavior */
+		break;
+	}
+}
+
 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_GREEN] = MT6370_LED_BRIGHTNESS_MAX;
+	brightness_range[EC_LED_COLOR_RED] = MT6370_LED_BRIGHTNESS_MAX;
 }
 
 int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
 {
+	if (led_id != EC_LED_ID_BATTERY_LED)
+		return EC_ERROR_INVAL;
+
+	mt6370_led_set_brightness(LED_GREEN, brightness[EC_LED_COLOR_GREEN]);
+	mt6370_led_set_brightness(LED_RED, brightness[EC_LED_COLOR_RED]);
 	return EC_SUCCESS;
 }
 
 /* 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();
 }
 DECLARE_HOOK(HOOK_SECOND, led_second, HOOK_PRIO_DEFAULT);