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46af344b87
BUG=chrome-os-partner:21180 BRANCH=slippy TEST=Manual. Verify LED is amber while charging, blue when charged, and off when external power disconnected. Signed-off-by: Dave Parker <dparker@chromium.org> Change-Id: If80bb9b0c70951d257621a2fe3ef20cd8749a033 Reviewed-on: https://gerrit.chromium.org/gerrit/62848 Tested-by: Dave Parker <dparker@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org> Commit-Queue: Dave Parker <dparker@chromium.org>
92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Power and battery LED control for Slippy.
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*/
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#include "battery.h"
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#include "charge_state.h"
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#include "chipset.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "lid_switch.h"
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#define LED_TOTAL_TICKS 16
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#define LED_ON_TICKS 4
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enum led_color {
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LED_OFF = 0,
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LED_BLUE,
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LED_AMBER,
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LED_COLOR_COUNT /* Number of colors, not a color itself */
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};
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static int led_set_color(enum led_color color, enum gpio_signal gpio_led_blue_l,
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enum gpio_signal gpio_led_amber_l)
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{
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switch (color) {
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case LED_OFF:
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gpio_set_level(gpio_led_blue_l, 1);
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gpio_set_level(gpio_led_amber_l, 1);
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break;
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case LED_BLUE:
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gpio_set_level(gpio_led_blue_l, 0);
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gpio_set_level(gpio_led_amber_l, 1);
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break;
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case LED_AMBER:
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gpio_set_level(gpio_led_blue_l, 1);
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gpio_set_level(gpio_led_amber_l, 0);
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break;
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default:
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return EC_ERROR_UNKNOWN;
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}
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return EC_SUCCESS;
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}
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static int bat_led_set_color(enum led_color color)
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{
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return led_set_color(color, GPIO_BAT_LED0_L, GPIO_BAT_LED1_L);
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}
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/* Called by hook task every 250mSec */
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static void led_tick(void)
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{
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static int ticks;
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uint32_t chflags = charge_get_flags();
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/* Battery LED is on the c-panel */
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if (!lid_is_open()) {
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bat_led_set_color(LED_OFF);
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return;
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}
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ticks++;
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switch (charge_get_state()) {
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case PWR_STATE_CHARGE:
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bat_led_set_color(LED_AMBER);
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break;
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case PWR_STATE_CHARGE_NEAR_FULL:
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bat_led_set_color(LED_BLUE);
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break;
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case PWR_STATE_DISCHARGE:
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bat_led_set_color(LED_OFF);
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break;
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case PWR_STATE_ERROR:
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bat_led_set_color((ticks & 0x2) ? LED_AMBER : LED_OFF);
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break;
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case PWR_STATE_IDLE: /* External power connected in IDLE state. */
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if (chflags & CHARGE_FLAG_FORCE_IDLE)
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bat_led_set_color((ticks & 0x4) ? LED_BLUE : LED_OFF);
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else
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bat_led_set_color(LED_BLUE);
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break;
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default:
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/* Other states don't alter LED behavior */
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break;
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}
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}
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DECLARE_HOOK(HOOK_TICK, led_tick, HOOK_PRIO_DEFAULT);
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