1 /*
2 * Copyright (c) 2019 - 2021 Henrik Brix Andersen <henrik@brixandersen.dk>
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #define DT_DRV_COMPAT holtek_ht16k33_keyscan
8
9 /**
10 * @file
11 * @brief Keyscan driver for the HT16K33 I2C LED driver
12 */
13
14 #include <zephyr/kernel.h>
15 #include <zephyr/drivers/kscan.h>
16 #include <zephyr/drivers/led/ht16k33.h>
17 #include <zephyr/logging/log.h>
18
19 LOG_MODULE_REGISTER(kscan_ht16k33, CONFIG_KSCAN_LOG_LEVEL);
20
21 BUILD_ASSERT(CONFIG_KSCAN_INIT_PRIORITY > CONFIG_LED_INIT_PRIORITY,
22 "HT16K33 keyscan driver must be initialized after HT16K33 LED driver");
23
24 struct kscan_ht16k33_cfg {
25 const struct device *parent;
26 };
27
kscan_ht16k33_config(const struct device * dev,kscan_callback_t callback)28 static int kscan_ht16k33_config(const struct device *dev,
29 kscan_callback_t callback)
30 {
31 const struct kscan_ht16k33_cfg *config = dev->config;
32
33 return ht16k33_register_keyscan_callback(config->parent, dev, callback);
34 }
35
kscan_ht16k33_init(const struct device * dev)36 static int kscan_ht16k33_init(const struct device *dev)
37 {
38 const struct kscan_ht16k33_cfg *config = dev->config;
39
40 if (!device_is_ready(config->parent)) {
41 LOG_ERR("HT16K33 parent device not ready");
42 return -EINVAL;
43 }
44
45 return 0;
46 }
47
48 static const struct kscan_driver_api kscan_ht16k33_api = {
49 .config = kscan_ht16k33_config,
50 };
51
52 #define KSCAN_HT16K33_DEVICE(id) \
53 static const struct kscan_ht16k33_cfg kscan_ht16k33_##id##_cfg = { \
54 .parent = DEVICE_DT_GET(DT_INST_BUS(id)), \
55 }; \
56 \
57 DEVICE_DT_INST_DEFINE(id, &kscan_ht16k33_init, \
58 NULL, NULL, \
59 &kscan_ht16k33_##id##_cfg, POST_KERNEL, \
60 CONFIG_KSCAN_INIT_PRIORITY, \
61 &kscan_ht16k33_api);
62
63 DT_INST_FOREACH_STATUS_OKAY(KSCAN_HT16K33_DEVICE)
64
