Extend dma_config structure to store the max channel count. This input is
used to populate dma device channel nodes at the fixed offset. It serves
as a preparatory patch for removing dma channel DT node order dependency,
added in the subsequent commit.
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xxxxxxxxxx>
---
drivers/dma/xilinx/xilinx_dma.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 6f1539c..2281af3 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -125,7 +125,9 @@
#define XILINX_VDMA_ENABLE_VERTICAL_FLIP BIT(0)
/* HW specific definitions */
-#define XILINX_DMA_MAX_CHANS_PER_DEVICE 0x20
+#define XILINX_MCDMA_MAX_CHANS_PER_DEVICE 0x20
+#define XILINX_DMA_MAX_CHANS_PER_DEVICE 0x2
+#define XILINX_CDMA_MAX_CHANS_PER_DEVICE 0x1
#define XILINX_DMA_DMAXR_ALL_IRQ_MASK \
(XILINX_DMA_DMASR_FRM_CNT_IRQ | \
@@ -468,6 +470,7 @@ struct xilinx_dma_config {
struct clk **tx_clk, struct clk **txs_clk,
struct clk **rx_clk, struct clk **rxs_clk);
irqreturn_t (*irq_handler)(int irq, void *data);
+ const int max_channels;
};
/**
@@ -2939,23 +2942,27 @@ static const struct xilinx_dma_config axidma_config = {
.dmatype = XDMA_TYPE_AXIDMA,
.clk_init = axidma_clk_init,
.irq_handler = xilinx_dma_irq_handler,
+ .max_channels = XILINX_DMA_MAX_CHANS_PER_DEVICE,
};
static const struct xilinx_dma_config aximcdma_config = {
.dmatype = XDMA_TYPE_AXIMCDMA,
.clk_init = axidma_clk_init,
.irq_handler = xilinx_mcdma_irq_handler,
+ .max_channels = XILINX_MCDMA_MAX_CHANS_PER_DEVICE,
};
static const struct xilinx_dma_config axicdma_config = {
.dmatype = XDMA_TYPE_CDMA,
.clk_init = axicdma_clk_init,
.irq_handler = xilinx_dma_irq_handler,
+ .max_channels = XILINX_CDMA_MAX_CHANS_PER_DEVICE,
};
static const struct xilinx_dma_config axivdma_config = {
.dmatype = XDMA_TYPE_VDMA,
.clk_init = axivdma_clk_init,
.irq_handler = xilinx_dma_irq_handler,
+ .max_channels = XILINX_DMA_MAX_CHANS_PER_DEVICE,
};
static const struct of_device_id xilinx_dma_of_ids[] = {
--
2.7.4
