1 // SPDX-License-Identifier: GPL-2.0-only
3 * spidev platform data initialization file
5 * (C) Copyright 2014, 2016 Intel Corporation
6 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
7 * Dan O'Donovan <dan@emutex.com>
10 #include <linux/err.h>
11 #include <linux/init.h>
12 #include <linux/sfi.h>
13 #include <linux/spi/pxa2xx_spi.h>
14 #include <linux/spi/spi.h>
16 #include <asm/intel-mid.h>
18 #define MRFLD_SPI_DEFAULT_DMA_BURST 8
19 #define MRFLD_SPI_DEFAULT_TIMEOUT 500
21 /* GPIO pin for spidev chipselect */
22 #define MRFLD_SPIDEV_GPIO_CS 111
24 static struct pxa2xx_spi_chip spidev_spi_chip = {
25 .dma_burst_size = MRFLD_SPI_DEFAULT_DMA_BURST,
26 .timeout = MRFLD_SPI_DEFAULT_TIMEOUT,
27 .gpio_cs = MRFLD_SPIDEV_GPIO_CS,
30 static void __init *spidev_platform_data(void *info)
32 struct spi_board_info *spi_info = info;
34 if (intel_mid_identify_cpu() != INTEL_MID_CPU_CHIP_TANGIER)
35 return ERR_PTR(-ENODEV);
37 spi_info->mode = SPI_MODE_0;
38 spi_info->controller_data = &spidev_spi_chip;
43 static const struct devs_id spidev_dev_id __initconst = {
45 .type = SFI_DEV_TYPE_SPI,
47 .get_platform_data = &spidev_platform_data,
50 sfi_device(spidev_dev_id);