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-rw-r--r--include/linux/spi/spi_gpio.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/spi/spi_gpio.h b/include/linux/spi/spi_gpio.h
index ca6782ee4b9f..369b3d7d5b95 100644
--- a/include/linux/spi/spi_gpio.h
+++ b/include/linux/spi/spi_gpio.h
@@ -29,11 +29,16 @@
29 * SPI_GPIO_NO_CHIPSELECT to the controller_data: 29 * SPI_GPIO_NO_CHIPSELECT to the controller_data:
30 * .controller_data = (void *) SPI_GPIO_NO_CHIPSELECT; 30 * .controller_data = (void *) SPI_GPIO_NO_CHIPSELECT;
31 * 31 *
32 * If the MISO or MOSI pin is not available then it should be set to
33 * SPI_GPIO_NO_MISO or SPI_GPIO_NO_MOSI.
34 *
32 * If the bitbanged bus is later switched to a "native" controller, 35 * If the bitbanged bus is later switched to a "native" controller,
33 * that platform_device and controller_data should be removed. 36 * that platform_device and controller_data should be removed.
34 */ 37 */
35 38
36#define SPI_GPIO_NO_CHIPSELECT ((unsigned long)-1l) 39#define SPI_GPIO_NO_CHIPSELECT ((unsigned long)-1l)
40#define SPI_GPIO_NO_MISO ((unsigned long)-1l)
41#define SPI_GPIO_NO_MOSI ((unsigned long)-1l)
37 42
38/** 43/**
39 * struct spi_gpio_platform_data - parameter for bitbanged SPI master 44 * struct spi_gpio_platform_data - parameter for bitbanged SPI master