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