4  * SPDX-License-Identifier: Apache-2.0
6  * This driver creates fake SPI buses which can contain emulated devices,
19 #include <zephyr/drivers/spi.h>
20 #include <zephyr/drivers/spi/rtio.h>
27 	/* SPI host configuration */
31 uint32_t spi_emul_get_config(const struct device *dev)  in spi_emul_get_config()  argument
33 	struct spi_emul_data *data = dev->data;  in spi_emul_get_config()
35 	return data->config;  in spi_emul_get_config()
39  * Find an emulator for a SPI bus
45  * @param dev SPI emulation controller device
46  * @param chipsel Chip-select value
50 static struct spi_emul *spi_emul_find(const struct device *dev, unsigned int chipsel)  in spi_emul_find()  argument
52 	struct spi_emul_data *data = dev->data;  in spi_emul_find()
55 	SYS_SLIST_FOR_EACH_NODE(&data->emuls, node) {  in spi_emul_find()
59 		if (emul->chipsel == chipsel) {  in spi_emul_find()
67 static int spi_emul_io(const struct device *dev, const struct spi_config *config,  in spi_emul_io()  argument
74 	emul = spi_emul_find(dev, config->slave);  in spi_emul_io()
76 		return -EIO;  in spi_emul_io()
79 	api = emul->api;  in spi_emul_io()
80 	__ASSERT_NO_MSG(emul->api);  in spi_emul_io()
81 	__ASSERT_NO_MSG(emul->api->io);  in spi_emul_io()
83 	if (emul->mock_api != NULL && emul->mock_api->io != NULL) {  in spi_emul_io()
84 		ret = emul->mock_api->io(emul->target, config, tx_bufs, rx_bufs);  in spi_emul_io()
85 		if (ret != -ENOSYS) {  in spi_emul_io()
90 	return api->io(emul->target, config, tx_bufs, rx_bufs);  in spi_emul_io()
94  * @brief This is a no-op stub of the SPI API's `release` method to protect drivers under test
97 static int spi_emul_release(const struct device *dev, const struct spi_config *config)  in spi_emul_release()  argument
99 	ARG_UNUSED(dev);  in spi_emul_release()
108  * @param dev SPI emulation controller device
110 static int spi_emul_init(const struct device *dev)  in spi_emul_init()  argument
112 	struct spi_emul_data *data = dev->data;  in spi_emul_init()
114 	sys_slist_init(&data->emuls);  in spi_emul_init()
116 	return emul_init_for_bus(dev);  in spi_emul_init()
119 int spi_emul_register(const struct device *dev, struct spi_emul *emul)  in spi_emul_register()  argument
121 	struct spi_emul_data *data = dev->data;  in spi_emul_register()
122 	const char *name = emul->target->dev->name;  in spi_emul_register()
124 	sys_slist_append(&data->emuls, &emul->node);  in spi_emul_register()
126 	LOG_INF("Register emulator '%s' at cs %u\n", name, emul->chipsel);  in spi_emul_register()
133 static DEVICE_API(spi, spi_emul_api) = {
143 		.dev = DEVICE_DT_GET(node_id),                                                     \