spi: sunxi: Add Allwinner A10 SPI controller driver

The older Allwinner SoCs (A10, A13, A10s and A20) all have the same SPI
controller.

Unfortunately, this SPI controller, even though quite similar, is significantly
different from the recently supported A31 SPI controller (different registers
offset, split/merged registers, etc.). Supporting both controllers in a single
driver would be unreasonable, hence the addition of a new driver.

Like its more recent counterpart, it supports DMA, but the driver only does PIO
until we have a dmaengine driver for this platform.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 0ec46415145d..5dffdc1691e8 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -446,6 +446,12 @@ config SPI_SIRF
         help
           SPI driver for CSR SiRFprimaII SoCs
 
+config SPI_SUN4I
+        tristate "Allwinner A10 SoCs SPI controller"
+        depends on ARCH_SUNXI || COMPILE_TEST
+        help
+          SPI driver for Allwinner sun4i, sun5i and sun7i SoCs
+
 config SPI_SUN6I
         tristate "Allwinner A31 SPI controller"
         depends on ARCH_SUNXI || COMPILE_TEST