c536bd3845
Add the scaffolding to create input lvgl pseudo devices which route zephyr input_event to their lvgl `indev` equivalent. As a first cut also add a `zephyr,lvgl-pointer-input compatible which can be a drop-in replacement for the existing kscan solution. Signed-off-by: Fabian Blatz <fabianblatz@gmail.com>
47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
/*
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* Copyright 2023 Fabian Blatz <fabianblatz@gmail.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "lvgl_common_input.h"
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#include <zephyr/device.h>
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#include <zephyr/kernel.h>
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#include <zephyr/logging/log.h>
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LOG_MODULE_DECLARE(lvgl);
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static void lvgl_input_read_cb(lv_indev_drv_t *drv, lv_indev_data_t *data)
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{
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const struct device *dev = drv->user_data;
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const struct lvgl_common_input_config *cfg = dev->config;
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k_msgq_get(cfg->event_msgq, data, K_NO_WAIT);
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data->continue_reading = k_msgq_num_used_get(cfg->event_msgq) > 0;
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}
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int lvgl_input_register_driver(lv_indev_type_t indev_type, const struct device *dev)
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{
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/* Currently no indev binding has its dedicated data
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* if that ever changes ensure that `lvgl_common_input_data`
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* remains the first member
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*/
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struct lvgl_common_input_data *common_data = dev->data;
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if (common_data == NULL) {
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return -EINVAL;
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}
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lv_indev_drv_init(&common_data->indev_drv);
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common_data->indev_drv.type = indev_type;
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common_data->indev_drv.read_cb = lvgl_input_read_cb;
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common_data->indev_drv.user_data = (void *)dev;
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common_data->indev = lv_indev_drv_register(&common_data->indev_drv);
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if (common_data->indev == NULL) {
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return -EINVAL;
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}
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return 0;
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}
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