This parameters defines the minimum number of bytes when dma is used.
Signed-off-by: Roman Tereshonkov <roman.tereshon...@nokia.com>
---
drivers/spi/spi.c | 1 +
include/linux/spi/spi.h | 3 +++
2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index b76f246..5bf7992 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -347,6 +347,7 @@ struct spi_device *spi_new_device(struct spi_master *master,
proxy->max_speed_hz = chip->max_speed_hz;
proxy->mode = chip->mode;
proxy->irq = chip->irq;
+ proxy->dma_min_bytes = chip->dma_min_bytes;
strlcpy(proxy->modalias, chip->modalias, sizeof(proxy->modalias));
proxy->dev.platform_data = (void *) chip->platform_data;
proxy->controller_data = chip->controller_data;
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 97b60b3..4e9961d 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -84,6 +84,7 @@ struct spi_device {
#define SPI_NO_CS 0x40 /* 1 dev/bus, no
chipselect */
#define SPI_READY 0x80 /* slave pulls low to
pause */
u8 bits_per_word;
+ int dma_min_bytes;
int irq;
void *controller_state;
void *controller_data;
@@ -727,6 +728,8 @@ struct spi_board_info {
*/
u8 mode;
+ /* dma_min_bytes defines minimum bytes when dma is used */
+ u32 dma_min_bytes;
/* ... may need additional spi_device chip config data here.
* avoid stuff protocol drivers can set; but include stuff
* needed to behave without being bound to a driver:
--
1.6.2.rc1.3.g81d3f
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