diff options
Diffstat (limited to 'include/linux/spi/spi_gpio.h')
-rw-r--r-- | include/linux/spi/spi_gpio.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/linux/spi/spi_gpio.h b/include/linux/spi/spi_gpio.h new file mode 100644 index 000000000..9e7e83d86 --- /dev/null +++ b/include/linux/spi/spi_gpio.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LINUX_SPI_GPIO_H +#define __LINUX_SPI_GPIO_H + +/* + * For each bitbanged SPI bus, set up a platform_device node with: + * - name "spi_gpio" + * - id the same as the SPI bus number it implements + * - dev.platform data pointing to a struct spi_gpio_platform_data + * + * Use spi_board_info with these busses in the usual way. + * + * If the bitbanged bus is later switched to a "native" controller, + * that platform_device and controller_data should be removed. + */ + +/** + * struct spi_gpio_platform_data - parameter for bitbanged SPI master + * @num_chipselect: how many slaves to allow + */ +struct spi_gpio_platform_data { + u16 num_chipselect; +}; + +#endif /* __LINUX_SPI_GPIO_H */ |