1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LINUX_SPI_GPIO_H 3 #define __LINUX_SPI_GPIO_H 4 5 /* 6 * For each bitbanged SPI bus, set up a platform_device node with: 7 * - name "spi_gpio" 8 * - id the same as the SPI bus number it implements 9 * - dev.platform data pointing to a struct spi_gpio_platform_data 10 * 11 * Use spi_board_info with these busses in the usual way. 12 * 13 * If the bitbanged bus is later switched to a "native" controller, 14 * that platform_device and controller_data should be removed. 15 */ 16 17 /** 18 * struct spi_gpio_platform_data - parameter for bitbanged SPI master 19 * @num_chipselect: how many slaves to allow 20 */ 21 struct spi_gpio_platform_data { 22 u16 num_chipselect; 23 }; 24 25 #endif /* __LINUX_SPI_GPIO_H */ 26