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/* Copyright 2021 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.
*/
#define DT_DRV_COMPAT cros_ec_pwm_leds
#include <string.h>
#include <devicetree.h>
#if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT)
#include "led_pwm.h"
#include "pwm.h"
BUILD_ASSERT(DT_NUM_INST_STATUS_OKAY(cros_ec_pwm_leds) <= 1,
"Multiple CrOS EC PWM LED instances defined");
BUILD_ASSERT(DT_INST_PROP_LEN(0, leds) <= 2,
"Unsupported number of LEDs defined");
#define PWM_CHANNEL_BY_IDX(node_id, prop, idx, led_ch) \
PWM_CHANNEL(DT_PWMS_CTLR_BY_IDX( \
DT_PHANDLE_BY_IDX(node_id, prop, idx), led_ch))
#define PWM_CHANNEL_BY_IDX_COND(node_id, prop, idx, led_ch) \
COND_CODE_1(DT_PROP_HAS_IDX( \
DT_PHANDLE_BY_IDX(node_id, prop, idx), pwms, led_ch), \
(PWM_CHANNEL_BY_IDX(node_id, prop, idx, led_ch)), \
(PWM_LED_NO_CHANNEL))
#define PWM_LED_INIT(node_id, prop, idx) \
[PWM_LED##idx] = { \
.ch0 = PWM_CHANNEL_BY_IDX_COND(node_id, prop, idx, 0), \
.ch1 = PWM_CHANNEL_BY_IDX_COND(node_id, prop, idx, 1), \
.ch2 = PWM_CHANNEL_BY_IDX_COND(node_id, prop, idx, 2), \
.enable = &pwm_enable, \
.set_duty = &pwm_set_duty, \
},
struct pwm_led pwm_leds[] = {
DT_INST_FOREACH_PROP_ELEM(0, leds, PWM_LED_INIT)
};
#define EC_LED_COLOR_BLANK {0}
struct pwm_led_color_map led_color_map[EC_LED_COLOR_COUNT] = {
[EC_LED_COLOR_RED] = DT_INST_PROP_OR(0, color_map_red,
EC_LED_COLOR_BLANK),
[EC_LED_COLOR_GREEN] = DT_INST_PROP_OR(0, color_map_green,
EC_LED_COLOR_BLANK),
[EC_LED_COLOR_BLUE] = DT_INST_PROP_OR(0, color_map_blue,
EC_LED_COLOR_BLANK),
[EC_LED_COLOR_YELLOW] = DT_INST_PROP_OR(0, color_map_yellow,
EC_LED_COLOR_BLANK),
[EC_LED_COLOR_WHITE] = DT_INST_PROP_OR(0, color_map_white,
EC_LED_COLOR_BLANK),
[EC_LED_COLOR_AMBER] = DT_INST_PROP_OR(0, color_map_amber,
EC_LED_COLOR_BLANK),
};
BUILD_ASSERT(DT_INST_PROP_LEN(0, brightness_range) == EC_LED_COLOR_COUNT,
"brightness_range must have exactly EC_LED_COLOR_COUNT values");
static const uint8_t dt_brigthness_range[EC_LED_COLOR_COUNT] = DT_INST_PROP(
0, brightness_range);
void led_get_brightness_range(enum ec_led_id led_id, uint8_t *brightness_range)
{
/* led_id is ignored, same ranges for all LEDs */
memcpy(brightness_range, dt_brigthness_range,
sizeof(dt_brigthness_range));
}
#define PWM_NAME_TO_ID(node_id) \
case DT_STRING_TOKEN(node_id, ec_led_name): \
pwm_id = DT_REG_ADDR(node_id); \
break;
int led_set_brightness(enum ec_led_id led_id, const uint8_t *brightness)
{
enum pwm_led_id pwm_id;
switch (led_id) {
DT_INST_FOREACH_CHILD(0, PWM_NAME_TO_ID)
default:
return EC_ERROR_UNKNOWN;
}
if (DT_INST_NODE_HAS_PROP(0, color_map_red) &&
brightness[EC_LED_COLOR_RED])
set_pwm_led_color(pwm_id, EC_LED_COLOR_RED);
else if (DT_INST_NODE_HAS_PROP(0, color_map_green) &&
brightness[EC_LED_COLOR_GREEN])
set_pwm_led_color(pwm_id, EC_LED_COLOR_GREEN);
else if (DT_INST_NODE_HAS_PROP(0, color_map_blue) &&
brightness[EC_LED_COLOR_BLUE])
set_pwm_led_color(pwm_id, EC_LED_COLOR_BLUE);
else if (DT_INST_NODE_HAS_PROP(0, color_map_yellow) &&
brightness[EC_LED_COLOR_YELLOW])
set_pwm_led_color(pwm_id, EC_LED_COLOR_YELLOW);
else if (DT_INST_NODE_HAS_PROP(0, color_map_white) &&
brightness[EC_LED_COLOR_WHITE])
set_pwm_led_color(pwm_id, EC_LED_COLOR_WHITE);
else if (DT_INST_NODE_HAS_PROP(0, color_map_amber) &&
brightness[EC_LED_COLOR_AMBER])
set_pwm_led_color(pwm_id, EC_LED_COLOR_AMBER);
else
/* Otherwise, the "color" is "off". */
set_pwm_led_color(pwm_id, -1);
return EC_SUCCESS;
}
#endif /* DT_HAS_COMPAT_STATUS_OKAY */
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