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drivers: spi: add dummy driver for vnd,spi

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We will need this to be able to DEVICE_DT_GET() bus devices from
tests/drivers/build_all in an upcoming commit.

Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
This commit is contained in:
Martí Bolívar 2021-01-15 16:34:55 -08:00 • committed by Anas Nashif
commit 63471ba93b
4 changed files with 73 additions and 0 deletions
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1
drivers/spi/CMakeLists.txt
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@ -22,5 +22,6 @@ zephyr_library_sources_ifdef(CONFIG_SPI_XEC_QMSPI spi_xec_qmspi.c)
zephyr_library_sources_ifdef(CONFIG_SPI_GECKO spi_gecko.c)
zephyr_library_sources_ifdef(CONFIG_SPI_XLNX_AXI_QUADSPI spi_xlnx_axi_quadspi.c)
zephyr_library_sources_ifdef(CONFIG_ESP32_SPIM spi_esp32_spim.c)
zephyr_library_sources_ifdef(CONFIG_SPI_TEST spi_test.c)
zephyr_library_sources_ifdef(CONFIG_USERSPACE spi_handlers.c)

2
drivers/spi/Kconfig
View file

@ -225,4 +225,6 @@ source "drivers/spi/Kconfig.xlnx"
source "drivers/spi/Kconfig.esp32"
source "drivers/spi/Kconfig.test"
endif # SPI

9
drivers/spi/Kconfig.test Normal file
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@ -0,0 +1,9 @@
# Copyright (c) 2021, Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0
DT_COMPAT_VND_SPI := vnd,spi
# Hidden option for turning on the dummy driver for vnd,spi devices
# used in testing.
config SPI_TEST
def_bool $(dt_compat_enabled,$(DT_COMPAT_VND_SPI))

61
drivers/spi/spi_test.c Normal file
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@ -0,0 +1,61 @@
/*
* Copyright (c) 2021, Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
/*
* This is not a real SPI driver. It is used to instantiate struct
* devices for the "vnd,spi" devicetree compatible used in test code.
*/
#include <zephyr.h>
#include <drivers/spi.h>
#define DT_DRV_COMPAT vnd_spi
static int vnd_spi_transceive(const struct device *dev,
const struct spi_config *spi_cfg,
const struct spi_buf_set *tx_bufs,
const struct spi_buf_set *rx_bufs)
{
return -ENOTSUP;
}
#ifdef CONFIG_SPI_ASYNC
static int vnd_spi_transceive_async(const struct device *dev,
const struct spi_config *spi_cfg,
const struct spi_buf_set *tx_bufs,
const struct spi_buf_set *rx_bufs,
struct k_poll_signal *async)
{
return -ENOTSUP;
}
#endif
static int vnd_spi_release(const struct device *dev,
const struct spi_config *spi_cfg)
{
return -ENOTSUP;
}
static const struct spi_driver_api vnd_spi_api = {
.transceive = vnd_spi_transceive,
#ifdef CONFIG_SPI_ASYNC
.transceive_async = vnd_spi_transceive_async,
#endif
.release = vnd_spi_release,
};
static int vnd_spi_init(const struct device *dev)
{
return 0;
}
#define VND_SPI_INIT(n) \
DEVICE_DT_INST_DEFINE(n, &vnd_spi_init, device_pm_control_nop, \
NULL, NULL, POST_KERNEL, \
CONFIG_KERNEL_INIT_PRIORITY_DEVICE, \
&vnd_spi_api);
DT_INST_FOREACH_STATUS_OKAY(VND_SPI_INIT)