diff options
| author | Hauke Mehrtens <hauke@hauke-m.de> | 2017-02-14 00:31:11 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-02-14 17:10:40 +0000 |
| commit | 17f84b793c01452e8802ef80324863b8da7d900b (patch) | |
| tree | bf02d8cf4c86ed2831bd3104048191c1809eea05 /drivers/spi/Kconfig | |
| parent | fafd67940774733fa97f4b09412aea6981b82e0a (diff) | |
spi: lantiq-ssc: add support for Lantiq SSC SPI controller
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>
Diffstat (limited to 'drivers/spi/Kconfig')
| -rw-r--r-- | drivers/spi/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index ec4aa252d6e8..1abba53c2334 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -415,6 +415,14 @@ config SPI_NUC900 help SPI driver for Nuvoton NUC900 series ARM SoCs +config SPI_LANTIQ_SSC + tristate "Lantiq SSC SPI controller" + depends on LANTIQ + help + 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. + config SPI_OC_TINY tristate "OpenCores tiny SPI" depends on GPIOLIB || COMPILE_TEST |