leds: add arduino,modulino-buttons-leds

Add an LED driver for the modulino buttons module, this has three LEDs
that are controllable independently of the buttons.

Link: https://github.com/arduino/node_modulino_firmware
Link: https://github.com/arduino-libraries/Modulino
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
This commit is contained in:
Fabio Baltieri 2025-04-06 16:28:27 +01:00 committed by Fabio Baltieri
commit 8060a59f3a
5 changed files with 125 additions and 0 deletions

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@ -19,6 +19,7 @@ zephyr_library_sources_ifdef(CONFIG_LP3943 lp3943.c)
zephyr_library_sources_ifdef(CONFIG_LP50XX lp50xx.c)
zephyr_library_sources_ifdef(CONFIG_LP5562 lp5562.c)
zephyr_library_sources_ifdef(CONFIG_LP5569 lp5569.c)
zephyr_library_sources_ifdef(CONFIG_MODULINO_BUTTONS_LEDS modulino_buttons_leds.c)
zephyr_library_sources_ifdef(CONFIG_NCP5623 ncp5623.c)
zephyr_library_sources_ifdef(CONFIG_PCA9633 pca9633.c)
zephyr_library_sources_ifdef(CONFIG_TLC59108 tlc59108.c)

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@ -38,6 +38,7 @@ source "drivers/led/Kconfig.lp3943"
source "drivers/led/Kconfig.lp50xx"
source "drivers/led/Kconfig.lp5562"
source "drivers/led/Kconfig.lp5569"
source "drivers/led/Kconfig.modulino"
source "drivers/led/Kconfig.ncp5623"
source "drivers/led/Kconfig.npm1300"
source "drivers/led/Kconfig.pca9633"

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@ -0,0 +1,10 @@
# Copyright (c) 2025 Google, LLC
# SPDX-License-Identifier: Apache-2.0
config MODULINO_BUTTONS_LEDS
bool "Arduino Modulino buttons LEDs"
default y
depends on DT_HAS_ARDUINO_MODULINO_BUTTONS_LEDS_ENABLED
select I2C
help
Enable driver Arduino Modulino Buttons LEDs.

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@ -0,0 +1,107 @@
/*
* Copyright 2025 Google LLC
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT arduino_modulino_buttons_leds
#include <zephyr/device.h>
#include <zephyr/drivers/i2c.h>
#include <zephyr/drivers/led.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(modulino_buttons_leds, CONFIG_LED_LOG_LEVEL);
#define MODULINO_BUTTONS_NUM_LEDS 3
struct modulino_buttons_leds_config {
struct i2c_dt_spec bus;
};
struct modulino_buttons_leds_data {
uint8_t buf[MODULINO_BUTTONS_NUM_LEDS];
};
static int modulino_buttons_leds_set(const struct device *dev,
uint32_t led, bool value)
{
const struct modulino_buttons_leds_config *cfg = dev->config;
struct modulino_buttons_leds_data *data = dev->data;
int ret;
if (led >= MODULINO_BUTTONS_NUM_LEDS) {
return -EINVAL;
}
data->buf[led] = value ? 1 : 0;
ret = i2c_write_dt(&cfg->bus, data->buf, sizeof(data->buf));
if (ret < 0) {
LOG_ERR("i2c write error: %d", ret);
return ret;
}
return 0;
}
static int modulino_buttons_leds_on(const struct device *dev, uint32_t led)
{
return modulino_buttons_leds_set(dev, led, true);
}
static int modulino_buttons_leds_off(const struct device *dev, uint32_t led)
{
return modulino_buttons_leds_set(dev, led, false);
}
static int modulino_buttons_leds_set_brightness(const struct device *dev,
uint32_t led, uint8_t value)
{
return modulino_buttons_leds_set(dev, led, value > 0);
}
static int modulino_buttons_leds_init(const struct device *dev)
{
const struct modulino_buttons_leds_config *cfg = dev->config;
struct modulino_buttons_leds_data *data = dev->data;
int ret;
if (!i2c_is_ready_dt(&cfg->bus)) {
LOG_ERR("Bus device is not ready");
return -ENODEV;
}
/* Reset to all LEDs off */
ret = i2c_write_dt(&cfg->bus, data->buf, sizeof(data->buf));
if (ret < 0) {
LOG_ERR("i2c write error: %d", ret);
return ret;
}
return 0;
}
static DEVICE_API(led, modulino_buttons_leds_api) = {
.on = modulino_buttons_leds_on,
.off = modulino_buttons_leds_off,
.set_brightness = modulino_buttons_leds_set_brightness,
};
#define MODULINO_BUTTONS_INIT(inst) \
static const struct modulino_buttons_leds_config \
modulino_buttons_leds_cfg_##inst = { \
.bus = I2C_DT_SPEC_GET(DT_INST_PARENT(inst)), \
}; \
\
static struct modulino_buttons_leds_data modulino_buttons_leds_data_##inst; \
\
DEVICE_DT_INST_DEFINE(inst, modulino_buttons_leds_init, NULL, \
&modulino_buttons_leds_data_##inst, \
&modulino_buttons_leds_cfg_##inst, \
POST_KERNEL, CONFIG_LED_INIT_PRIORITY, \
&modulino_buttons_leds_api);
DT_INST_FOREACH_STATUS_OKAY(MODULINO_BUTTONS_INIT)

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@ -0,0 +1,6 @@
# Copyright (c) 2025 Google, LLC
# SPDX-License-Identifier: Apache-2.0
description: Arduino Modulino buttons LEDs
compatible: "arduino,modulino-buttons-leds"