dmaengine: dw: dmamux: Introduce RZN1 DMA router support
The Renesas RZN1 DMA IP is based on a DW core, with eg. an additional
dmamux register located in the system control area which can take up to
32 requests (16 per DMA controller). Each DMA channel can be wired to
two different peripherals.
We need two additional information from the 'dmas' property: the channel
(bit in the dmamux register) that must be accessed and the value of the
mux for this channel.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220427095653.91804-6-miquel.raynal@bootlin.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
diff --git a/drivers/dma/dw/Kconfig b/drivers/dma/dw/Kconfig
index db25f9b..a9828dd 100644
--- a/drivers/dma/dw/Kconfig
+++ b/drivers/dma/dw/Kconfig
@@ -16,6 +16,15 @@
Support the Synopsys DesignWare AHB DMA controller. This
can be integrated in chips such as the Intel Cherrytrail.
+config RZN1_DMAMUX
+ tristate "Renesas RZ/N1 DMAMUX driver"
+ depends on DW_DMAC
+ depends on ARCH_RZN1 || COMPILE_TEST
+ help
+ Support the Renesas RZ/N1 DMAMUX which is located in front of
+ the Synopsys DesignWare AHB DMA controller located on Renesas
+ SoCs.
+
config DW_DMAC_PCI
tristate "Synopsys DesignWare AHB DMA PCI driver"
depends on PCI
