diff options
Diffstat (limited to 'Documentation/spi')
| -rw-r--r-- | Documentation/spi/pxa2xx | 6 | ||||
| -rw-r--r-- | Documentation/spi/spi-summary | 4 |
2 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/spi/pxa2xx b/Documentation/spi/pxa2xx index 9c45f3d..a1e0ee2 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. diff --git a/Documentation/spi/spi-summary b/Documentation/spi/spi-summary index 068732d3..7279579 100644 --- a/Documentation/spi/spi-summary +++ b/Documentation/spi/spi-summary @@ -262,7 +262,7 @@ NON-STATIC CONFIGURATIONS Developer boards often play by different rules than product boards, and one example is the potential need to hotplug SPI devices and/or controllers. -For those cases you might need to use use spi_busnum_to_master() to look +For those cases you might need to use spi_busnum_to_master() to look up the spi bus master, and will likely need spi_new_device() to provide the board info based on the board that was hotplugged. Of course, you'd later call at least spi_unregister_device() when that board is removed. @@ -322,7 +322,7 @@ As soon as it enters probe(), the driver may issue I/O requests to the SPI device using "struct spi_message". When remove() returns, the driver guarantees that it won't submit any more such messages. - - An spi_message is a sequence of of protocol operations, executed + - An spi_message is a sequence of protocol operations, executed as one atomic sequence. SPI driver controls include: + when bidirectional reads and writes start ... by how its |
