48f92e6f1d
Gregory Nutt has submitted the SGA Bill Gatliff has submitted the ICLA as a result we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/****************************************************************************
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* boards/arm/stm32/omnibusf4/src/stm32_max7456.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <debug.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/video/max7456.h>
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#include "stm32_gpio.h"
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#include "stm32_spi.h"
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#include "omnibusf4.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_max7456_initialize
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*
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* Description:
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*
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* Initialize and register Omnibus F4's MAX7456 OSD chip. The wiring
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* isn't configurable, but we use macros anyway because some of the
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* values are referred to in more than one place. And also, because
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* that's generally what NuttX does.
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*
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* In particular, the slave-select pin is defined by us, but
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* controlled elsewhere as part of the SPI machinery. This is an odd
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* thing in our case because nothing else is using the SPI port, but
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* that's not the general presentation so I'm staying consistent
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* with the pattern.
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*
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****************************************************************************/
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int stm32_max7456_initialize(void)
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{
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int port = SPIPORT_MAX7456;
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int minor = SPIMINOR_MAX7456;
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int cs = GPIO_CS_MAX7456;
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stm32_configgpio(GPIO_CS_MAX7456);
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struct mx7_config_s config =
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{
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.spi_devid = minor,
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};
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UNUSED(cs);
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/* Get the spi bus instance. */
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struct spi_dev_s *spi = stm32_spibus_initialize(port);
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if (spi == NULL)
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{
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return -ENODEV;
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}
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config.spi = spi;
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/* Register the chip with the device driver. */
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return max7456_register(DEVNODE_MAX7456, &config);
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}
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