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/* Copyright (c) 2015 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.
*
* Power LED control for Ninja
*/
#include "charge_state.h"
#include "chipset.h"
#include "gpio.h"
#include "hooks.h"
#include "led_common.h"
#include "pwm.h"
#include "util.h"
const enum ec_led_id supported_led_ids[] = {EC_LED_ID_POWER_LED};
const int supported_led_ids_count = ARRAY_SIZE(supported_led_ids);
enum led_color {
LED_OFF = 0,
LED_BLUE,
/* Number of colors, not a color itself */
LED_COLOR_COUNT
};
/* Brightness vs. color, for Power LED */
static const uint8_t color_brightness[LED_COLOR_COUNT] = {
0,
100,
};
/**
* Set LED color
*
* @param color Enumerated color value
*/
static void set_color(enum led_color color)
{
pwm_set_duty(PWM_CH_LED_BLUE_POWER_LED, color_brightness[color]);
}
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
brightness_range[EC_LED_COLOR_BLUE] = 100;
}
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
pwm_set_duty(PWM_CH_LED_BLUE_POWER_LED, brightness[EC_LED_COLOR_BLUE]);
return EC_SUCCESS;
}
static void led_init(void)
{
/* Configure GPIOs */
gpio_config_module(MODULE_PWM_LED, 1);
/*
* Enable PWMs and set to 0% duty cycle. If they're disabled, the LM4
* seems to ground the pins instead of letting them float.
*/
pwm_enable(PWM_CH_LED_BLUE_POWER_LED, 1);
set_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 unsigned power_ticks;
static int previous_state_suspend;
power_ticks++;
/* 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_color(LED_BLUE);
} else if (chipset_in_state(CHIPSET_STATE_SUSPEND)) {
if (!previous_state_suspend) {
previous_state_suspend = 1;
power_ticks = 0;
}
/* Flashing 1 sec on, 1 sec off */
set_color((power_ticks % 8) < 4 ? LED_BLUE : LED_OFF);
return;
} else {
set_color(LED_OFF);
}
previous_state_suspend = 0;
}
DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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