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authorRadhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>2020-01-30 18:24:24 +0530
committerVinod Koul <vkoul@kernel.org>2020-02-25 11:17:53 +0530
commit04c2bc2bede12f768227ac2b62b21258dc6b45e8 (patch)
tree30b8b44e9d26bd5a8fda0f1e4ff6fa7393e6a689
parentd80cbef35bf89b763f06e03bb4ff8f933bf012c5 (diff)
downloadlinux-04c2bc2bede12f768227ac2b62b21258dc6b45e8.tar.bz2
dmaengine: xilinx_dma: Extend dma_config structure to store max channel count
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@xilinx.com> Link: https://lore.kernel.org/r/1580388865-9960-2-git-send-email-radhey.shyam.pandey@xilinx.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
-rw-r--r--drivers/dma/xilinx/xilinx_dma.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 6f1539cad1ee..2281af30beeb 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[] = {