diff options
| -rw-r--r-- | bsps/arm/imxrt/include/imxrt/lpspi.h | 54 | ||||
| -rw-r--r-- | bsps/arm/imxrt/spi/imxrt-lpspi.c | 20 | ||||
| -rw-r--r-- | spec/build/bsps/arm/imxrt/bspimxrt.yml | 1 |
3 files changed, 75 insertions, 0 deletions
diff --git a/bsps/arm/imxrt/include/imxrt/lpspi.h b/bsps/arm/imxrt/include/imxrt/lpspi.h new file mode 100644 index 0000000000..8a87f28da9 --- /dev/null +++ b/bsps/arm/imxrt/include/imxrt/lpspi.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/* + * Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de) + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef LIBBSP_ARM_IMXRT_IMXRT_LPSPI_H +#define LIBBSP_ARM_IMXRT_IMXRT_LPSPI_H + +#include <sys/ioccom.h> + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +#define IMXRT_LPSPI_IOC_MAGIC 's' + +/** + * @brief Fetch the raw registers. + * + * This allows to do some special operations. Note that if you do something + * fancy, you should lock the hardware by obtaining the bus with the + * SPI_BUS_OBTAIN ioctl first. With that, the normal driver can't be used by + * other tasks. Also note that you should leave the registers in a clean state + * before releasing the bus again. + */ +#define IMXRT_LPSPI_GET_REGISTERS _IOR(IMXRT_LPSPI_IOC_MAGIC, 0, LPSPI_Type *) + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* LIBBSP_ARM_IMXRT_IMXRT_LPSPI_H */ diff --git a/bsps/arm/imxrt/spi/imxrt-lpspi.c b/bsps/arm/imxrt/spi/imxrt-lpspi.c index 6da3ffdecf..06d8f715d9 100644 --- a/bsps/arm/imxrt/spi/imxrt-lpspi.c +++ b/bsps/arm/imxrt/spi/imxrt-lpspi.c @@ -34,6 +34,7 @@ #include <dev/spi/spi.h> #include <fsl_clock.h> #include <libfdt.h> +#include <imxrt/lpspi.h> struct imxrt_lpspi_bus { spi_bus base; @@ -471,6 +472,24 @@ static clock_ip_name_t imxrt_lpspi_clock_ip(volatile LPSPI_Type *regs) return kCLOCK_IpInvalid; } +static int imxrt_lpspi_ioctl(spi_bus *base, ioctl_command_t command, void *arg) +{ + struct imxrt_lpspi_bus *bus; + bus = (struct imxrt_lpspi_bus *) base; + int err = 0; + + switch (command) { + case IMXRT_LPSPI_GET_REGISTERS: + *(volatile LPSPI_Type**)arg = bus->regs; + break; + default: + err = -EINVAL; + break; + } + + return err; +} + void imxrt_lpspi_init(void) { const void *fdt; @@ -523,6 +542,7 @@ void imxrt_lpspi_init(void) bus->base.transfer = imxrt_lpspi_transfer; bus->base.destroy = imxrt_lpspi_destroy; bus->base.setup = imxrt_lpspi_setup; + bus->base.ioctl = imxrt_lpspi_ioctl; eno = spi_bus_register(&bus->base, bus_path); if (eno != 0) { diff --git a/spec/build/bsps/arm/imxrt/bspimxrt.yml b/spec/build/bsps/arm/imxrt/bspimxrt.yml index be4a4bb566..3044fda998 100644 --- a/spec/build/bsps/arm/imxrt/bspimxrt.yml +++ b/spec/build/bsps/arm/imxrt/bspimxrt.yml @@ -103,6 +103,7 @@ install: source: - bsps/arm/imxrt/include/imxrt/imxrt1050.dtsi - bsps/arm/imxrt/include/imxrt/imxrt1050-pinfunc.h + - bsps/arm/imxrt/include/imxrt/lpspi.h - bsps/arm/imxrt/include/imxrt/memory.h - bsps/arm/imxrt/include/imxrt/mpu-config.h - destination: ${BSP_LIBDIR} |