dma: mv_xor: allow channels to be registered directly from the main device

Extend the XOR engine driver (currently called "mv_xor_shared") so
that XOR channels can be passed in the platform_data structure, and be
registered from there.

This will allow the users of the driver to be converted to the single
platform_driver variant of the mv_xor driver.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/dma/mv_xor.h b/drivers/dma/mv_xor.h
index a0641aebbdef..686575f6b9f5 100644
--- a/drivers/dma/mv_xor.h
+++ b/drivers/dma/mv_xor.h
@@ -26,6 +26,7 @@
 #define USE_TIMER
 #define MV_XOR_SLOT_SIZE                64
 #define MV_XOR_THRESHOLD                1
+#define MV_XOR_MAX_CHANNELS             2
 
 #define XOR_OPERATION_MODE_XOR          0
 #define XOR_OPERATION_MODE_MEMCPY       2
@@ -53,9 +54,10 @@
 #define WINDOW_BAR_ENABLE(chan) (0x240 + ((chan) << 2))
 
 struct mv_xor_shared_private {
-        void __iomem    *xor_base;
-        void __iomem    *xor_high_base;
-        struct clk      *clk;
+        void __iomem         *xor_base;
+        void __iomem         *xor_high_base;
+        struct clk           *clk;
+        struct mv_xor_device *channels[MV_XOR_MAX_CHANNELS];
 };