diff options
Diffstat (limited to 'Documentation/spi/pxa2xx')
| -rw-r--r-- | Documentation/spi/pxa2xx | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/Documentation/spi/pxa2xx b/Documentation/spi/pxa2xx index 9c45f3df2e1844..a1e0ee20f595cc 100644 --- a/Documentation/spi/pxa2xx +++ b/Documentation/spi/pxa2xx @@ -124,12 +124,12 @@ use a value of 8. The "pxa2xx_spi_chip.timeout_microsecs" fields is used to efficiently handle trailing bytes in the SSP receiver fifo. The correct value for this field is dependent on the SPI bus speed ("spi_board_info.max_speed_hz") and the specific -slave device. Please note the the PXA2xx SSP 1 does not support trailing byte +slave device. Please note that the PXA2xx SSP 1 does not support trailing byte timeouts and must busy-wait any trailing bytes. The "pxa2xx_spi_chip.enable_loopback" field is used to place the SSP porting into internal loopback mode. In this mode the SSP controller internally -connects the SSPTX pin the the SSPRX pin. This is useful for initial setup +connects the SSPTX pin to the SSPRX pin. This is useful for initial setup testing. The "pxa2xx_spi_chip.cs_control" field is used to point to a board specific @@ -208,7 +208,7 @@ DMA and PIO I/O Support ----------------------- The pxa2xx_spi driver support both DMA and interrupt driven PIO message transfers. The driver defaults to PIO mode and DMA transfers must enabled by -setting the "enable_dma" flag in the "pxa2xx_spi_master" structure and and +setting the "enable_dma" flag in the "pxa2xx_spi_master" structure and ensuring that the "pxa2xx_spi_chip.dma_burst_size" field is non-zero. The DMA mode support both coherent and stream based DMA mappings. |