linux/drivers/video/fbdev/mmp/hw/mmp_spi.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * linux/drivers/video/mmp/hw/mmp_spi.c
 * using the spi in LCD controler for commands send
 *
 * Copyright (C) 2012 Marvell Technology Group Ltd.
 * Authors:  Guoqing Li <[email protected]>
 *          Lisa Du <[email protected]>
 *          Zhou Zhu <[email protected]>
 */
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/spi/spi.h>
#include "mmp_ctrl.h"

/**
 * spi_write - write command to the SPI port
 * @spi:  the SPI device.
 * @data: can be 8/16/32-bit, MSB justified data to write.
 *
 * Wait bus transfer complete IRQ.
 * The caller is expected to perform the necessary locking.
 *
 * Returns:
 *   %-ETIMEDOUT	timeout occurred
 *   0			success
 */
static inline int lcd_spi_write(struct spi_device *spi, u32 data)
{ … }

static int lcd_spi_setup(struct spi_device *spi)
{ … }

static int lcd_spi_one_transfer(struct spi_device *spi, struct spi_message *m)
{ … }

int lcd_spi_register(struct mmphw_ctrl *ctrl)
{ … }