kernel.git/include/trace/events/spi.h, branch linux-4.13.y

spi: Generalize SPI "master" to "controller"

2017-06-13T17:51:11Z

Now struct spi_master is used for both SPI master and slave controllers, it makes sense to rename it to struct spi_controller, and replace "master" by "controller" where appropriate. For now this conversion is done for SPI core infrastructure only. Wrappers are provided for backwards compatibility, until all SPI drivers have been converted. Noteworthy details: - SPI_MASTER_GPIO_SS is retained, as it only makes sense for SPI master controllers, - spi_busnum_to_master() is retained, as it looks up masters only, - A new field spi_device.controller is added, but spi_device.master is retained for compatibility (both are always initialized by spi_alloc_device()), - spi_flash_read() is used by SPI masters only. Signed-off-by: Geert Uytterhoeven Signed-off-by: Mark Brown

spi: Provide common spi_message processing loop

2013-10-11T19:09:50Z

The loops which SPI controller drivers use to process the list of transfers in a spi_message are typically very similar and have some error prone areas such as the handling of /CS. Help simplify drivers by factoring this code out into the core - if drivers provide a transfer_one() function instead of a transfer_one_message() function the core will handle processing at the message level. /CS can be controlled by either setting cs_gpio or providing a set_cs function. If this is not possible for hardware reasons then both can be omitted and the driver should continue to implement manual /CS handling. This is a first step in refactoring and it is expected that there will be further enhancements, for example factoring out of the mapping of transfers for DMA and the initiation and completion of interrupt driven transfers. Signed-off-by: Mark Brown

spi/trace: Trace length of SPI messages on completion

2013-10-08T17:03:05Z

Signed-off-by: Mark Brown

spi: Provide trace points for message processing

2013-10-07T19:02:01Z

Provide tracepoints for the lifecycle of a message from submission to completion and for the active time for masters to help with performance analysis of SPI I/O. Signed-off-by: Mark Brown