Swanky: To implement power led.

BUG=chrome-os-partner:29077
BRANCH=rambi
TEST=make buildall -j and power led can be operated normally.

Change-Id: Iaf69859fdaa6e511d8e19810f38bed85209a226c
Signed-off-by: Aaron Weng <aaron.weng@quantatw.com>
Reviewed-on: https://chromium-review.googlesource.com/202655
Reviewed-by: Dave Parker <dparker@chromium.org>

4 files changed, 36 insertions, 5 deletions

diff --git a/board/swanky/battery.c b/board/swanky/battery.c
index 783fd923bd..f7df07d129 100644
--- a/board/swanky/battery.c
+++ b/board/swanky/battery.c
@@ -65,7 +65,7 @@ DECLARE_DEFERRED(wakeup_deferred);
 static void wakeup(void)
 {
 	/*
-	 * The deferred call ensures thet wakeup_deferred is called from a
+	 * The deferred call ensures that wakeup_deferred is called from a
 	 * task. This is required to talk to the battery over I2C.
 	 */
 	hook_call_deferred(wakeup_deferred, 0);
diff --git a/board/swanky/board.c b/board/swanky/board.c
index 6e0ef2109e..e0c2cb00df 100644
--- a/board/swanky/board.c
+++ b/board/swanky/board.c
@@ -125,6 +125,7 @@ const struct gpio_alt_func gpio_alt_funcs[] = {
 	{GPIO_D, 0x0f, 2, MODULE_SPI},			/* SPI1 */
 	{GPIO_L, 0x3f, 15, MODULE_LPC},			/* LPC */
 	{GPIO_M, 0x21, 15, MODULE_LPC},			/* LPC */
+	{GPIO_M, 0x40, 1, MODULE_PWM_LED},		/* FAN0PWM 0 */
 	{GPIO_N, 0x50, 1, MODULE_PWM_LED, GPIO_OPEN_DRAIN}, /* FAN0PWM 3&4 */
 };
 const int gpio_alt_funcs_count = ARRAY_SIZE(gpio_alt_funcs);
@@ -171,6 +172,7 @@ BUILD_ASSERT(ARRAY_SIZE(adc_channels) == ADC_CH_COUNT);
 const struct pwm_t pwm_channels[] = {
 	{4, PWM_CONFIG_ACTIVE_LOW},
 	{3, PWM_CONFIG_ACTIVE_LOW},
+	{0, 0}
 };
 
 BUILD_ASSERT(ARRAY_SIZE(pwm_channels) == PWM_CH_COUNT);
diff --git a/board/swanky/board.h b/board/swanky/board.h
index 0e3798f76b..c2d04b2a1d 100644
--- a/board/swanky/board.h
+++ b/board/swanky/board.h
@@ -168,7 +168,7 @@ enum adc_channel {
 enum pwm_channel {
 	PWM_CH_LED_GREEN,
 	PWM_CH_LED_ORANGE,
-
+	PWM_CH_POWER_LED_WHITE,
 	/* Number of PWM channels */
 	PWM_CH_COUNT
 };
diff --git a/board/swanky/led.c b/board/swanky/led.c
index e0415a8221..13bcb5bbc2 100644
--- a/board/swanky/led.c
+++ b/board/swanky/led.c
@@ -13,12 +13,13 @@
 #include "pwm.h"
 #include "util.h"
 
-const enum ec_led_id supported_led_ids[] = {EC_LED_ID_BATTERY_LED};
+const enum ec_led_id supported_led_ids[] = {
+	EC_LED_ID_BATTERY_LED, EC_LED_ID_POWER_LED};
 const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
 
 enum led_color {
 	LED_OFF = 0,
-	LED_RED,
+	LED_WHITE,
 	LED_ORANGE,
 	LED_YELLOW,
 	LED_GREEN,
@@ -47,6 +48,11 @@ static void set_battery_led_color(enum led_color color)
 	pwm_set_duty(PWM_CH_LED_GREEN, color_brightness[color][1]);
 }
 
+static void set_power_led_color(enum led_color color)
+{
+	pwm_set_duty(PWM_CH_POWER_LED_WHITE, color_brightness[color][0]);
+}
+
 void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
 {
 	brightness_range[EC_LED_COLOR_YELLOW] = 100;
@@ -72,13 +78,14 @@ static void led_init(void)
 	pwm_enable(PWM_CH_LED_ORANGE, 1);
 	pwm_enable(PWM_CH_LED_GREEN, 1);
 	set_battery_led_color(LED_OFF);
+	set_power_led_color(LED_OFF);
 }
 DECLARE_HOOK(HOOK_INIT, led_init, HOOK_PRIO_DEFAULT);
 
 /**
  * Called by hook task every 250 ms
  */
-static void led_tick(void)
+static void battery_led_tick(void)
 {
 	static unsigned ticks;
 	int chstate = charge_get_state();
@@ -118,4 +125,26 @@ static void led_tick(void)
 	/* Otherwise, system is off and AC not connected, LED off */
 	set_battery_led_color(LED_OFF);
 }
+
+static void power_led_tick(void)
+{
+
+	/* If we don't control the LED, nothing to do */
+	if (!led_auto_control_is_enabled(EC_LED_ID_POWER_LED))
+		return;
+
+	if (chipset_in_state(CHIPSET_STATE_ON)) {
+		set_power_led_color(LED_WHITE);
+		return;
+	}
+
+	set_power_led_color(LED_OFF);
+
+}
+
+static void led_tick(void)
+{
+	battery_led_tick();
+	power_led_tick();
+}
 DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);