Commit 4ef7af50 authored by Anton Vorontsov's avatar Anton Vorontsov Committed by Linus Torvalds

SPI loopback mode definition

Loopback mode is supported by various controllers.  This mode can be
useful for testing, especially in conjunction with spidev driver.
Signed-off-by: default avatarAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 35cc0b97
...@@ -77,6 +77,7 @@ struct spi_device { ...@@ -77,6 +77,7 @@ struct spi_device {
#define SPI_CS_HIGH 0x04 /* chipselect active high? */ #define SPI_CS_HIGH 0x04 /* chipselect active high? */
#define SPI_LSB_FIRST 0x08 /* per-word bits-on-wire */ #define SPI_LSB_FIRST 0x08 /* per-word bits-on-wire */
#define SPI_3WIRE 0x10 /* SI/SO signals shared */ #define SPI_3WIRE 0x10 /* SI/SO signals shared */
#define SPI_LOOP 0x20 /* loopback mode */
u8 bits_per_word; u8 bits_per_word;
int irq; int irq;
void *controller_state; void *controller_state;
......
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