dma: Add a Kconfig for legacy DMA

We cannot use the existing DMA config for the MCD driver because it is
not migrated to driver model. In order to move it to drivers/Makefile
we need some sort of option for it. Add a new DMA_LEGACY option, which
also acts as a signal that it should be migrated.

Enable this for devkit3250 which uses CONFIG_DMA_LPC32XX which is not
converted to Kconfig.

For now this is not used in the Makefile. That update happens in a
following patch.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 1993c1d..e81ae96 100644 (file)
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -37,6 +37,7 @@ config BCM6348_IUDMA
 
 config TI_EDMA3
        bool "TI EDMA3 driver"
+       select DMA_LEGACY
        help
          Enable the TI EDMA3 driver for DRA7xx and AM43xx evms.
          This driver support data transfer between memory
@@ -57,6 +58,15 @@ config APBH_DMA_BURST8
 
 endif
 
+config DMA_LEGACY
+       bool "Legacy DMA support"
+       default y if FSLDMAFEC
+       help
+         Enable legacy DMA support. This does not use driver model and should
+         be migrated to the new API.
+
+         It is required for some PowerPC boards.
+
 source "drivers/dma/ti/Kconfig"
 
 endmenu # menu "DMA Support"