summaryrefslogtreecommitdiff
path: root/drivers/spi/spi-lantiq-ssc.c
AgeCommit message (Collapse)Author
2017-04-26Merge remote-tracking branches 'spi/topic/devprop', 'spi/topic/fsl', ↵Mark Brown
'spi/topic/fsl-dspi', 'spi/topic/imx' and 'spi/topic/lantiq' into spi-next
2017-03-01spi: lantiq-ssc: add LTQ_ prefix to definesHauke Mehrtens
The blackfin architecture has a SPI_STAT define which conflicts with the define from the spi-lantiq-ssc driver in compile test mode. Fix this by adding a prefix in front of every define. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-21spi: lantiq-ssc: fix platform_no_drv_owner.cocci warningskbuild test robot
drivers/spi/spi-lantiq-ssc.c:973:3-8: No need to set .owner here. The core will do it. Remove .owner field if calls are used which set it automatically Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Acked-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-14spi: lantiq-ssc: add support for Lantiq SSC SPI controllerHauke Mehrtens
This driver supports the Lantiq SSC SPI controller in master mode. This controller is found on Intel (former Lantiq) SoCs like the Danube, Falcon, xRX200, xRX300. The hardware uses two hardware FIFOs one for received and one for transferred bytes. When the driver writes data into the transmit FIFO the complete word is taken from the FIFO into a shift register. The data from this shift register is then written to the wire. This driver uses the interrupts signaling the status of the FIFOs and not the shift register. It is also possible to use the interrupts for the shift register, but they will send a signal after every word. When using the interrupts for the shift register we get a signal when the last word is written into the shift register and not when it is written to the wire. After all FIFOs are empty the driver busy waits till the hardware is not busy any more and returns the transfer status. Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Signed-off-by: Mark Brown <broonie@kernel.org>