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/* Copyright 2018 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.
*/
#ifndef __CROS_EC_LED_PWM_H
#define __CROS_EC_LED_PWM_H
#include "ec_commands.h"
#ifdef CONFIG_ZEPHYR
#include "drivers/pwm.h"
#endif
#ifdef CONFIG_ZEPHYR
#define PWM_LED_NO_CHANNEL NULL
/* This could really be pwm_dt_spec. */
struct pwm_led_dt_channel {
const struct device *dev;
uint32_t channel;
pwm_flags_t flags;
uint32_t period_us;
};
struct pwm_led {
const struct pwm_led_dt_channel *ch0;
const struct pwm_led_dt_channel *ch1;
const struct pwm_led_dt_channel *ch2;
void (*set_duty)(const struct pwm_led_dt_channel *ch, int percent);
};
#else
#define PWM_LED_NO_CHANNEL ((enum pwm_channel)(-1))
struct pwm_led {
enum pwm_channel ch0;
enum pwm_channel ch1;
enum pwm_channel ch2;
void (*enable)(enum pwm_channel ch, int enabled);
void (*set_duty)(enum pwm_channel ch, int percent);
};
#endif
struct pwm_led_color_map {
uint8_t ch0;
uint8_t ch1;
uint8_t ch2;
};
enum pwm_led_id {
PWM_LED0 = 0,
#if CONFIG_LED_PWM_COUNT >= 2
PWM_LED1,
#endif /* CONFIG_LED_PWM_COUNT > 2 */
};
/*
* A mapping of color to LED duty cycles per channel.
*
* This should be defined by the boards to declare what each color looks like.
* There should be an entry for every enum ec_led_colors value. For colors that
* are impossible for a given board, they should define a duty cycle of 0 for
* all applicable channels. (e.g. A bi-color LED which has a red and green
* channel should define all 0s for EC_LED_COLOR_BLUE and EC_LED_COLOR_WHITE.)
*/
extern struct pwm_led_color_map led_color_map[EC_LED_COLOR_COUNT];
/*
* A map of the PWM channels to logical PWM LEDs.
*
* A logical PWM LED would be considered as "per diffuser". There may be 1-3
* channels per diffuser and they should form a single entry in pwm_leds. If a
* channel is not used, simply define that channel as PWM_LED_NO_CHANNEL.
*/
extern struct pwm_led pwm_leds[CONFIG_LED_PWM_COUNT];
void set_pwm_led_color(enum pwm_led_id id, int color);
#endif /* defined(__CROS_EC_LED_PWM_H) */
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