The A64 SoC has the same dma engine as the H3 (sun8i), with a
reduced amount of physical channels. To allow future reuse of the
compatible, leave the channel count etc. in the config data blank
and retrieve it from the devicetree.
Signed-off-by: Stefan Brüns <stefan.bruens@xxxxxxxxxxxxxx>
Acked-by: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
---
Changes in v3:
- Omit default values from sun50i_a64_dma_cfg definition
Changes in v2: None
drivers/dma/sun6i-dma.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 34d70af442ff..b4e759f4aa75 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -1122,6 +1122,25 @@ static struct sun6i_dma_config sun8i_h3_dma_cfg = {
BIT(DMA_SLAVE_BUSWIDTH_8_BYTES);
};
+/*
+ * The A64 binding uses the number of dma channels from the
+ * device tree node.
+ */
+static struct sun6i_dma_config sun50i_a64_dma_cfg = {
+ .clock_autogate_enable = sun6i_enable_clock_autogate_h3;
+ .set_burst_length = sun6i_set_burst_length_h3;
+ .src_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16);
+ .dst_burst_lengths = BIT(1) | BIT(4) | BIT(8) | BIT(16);
+ .src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_8_BYTES);
+ .dst_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_8_BYTES);
+};
+
/*
* The V3s have only 8 physical channels, a maximum DRQ port id of 23,
* and a total of 24 usable source and destination endpoints.
@@ -1149,6 +1168,7 @@ static const struct of_device_id sun6i_dma_match[] = {
{ .compatible = "allwinner,sun8i-a83t-dma", .data = &sun8i_a83t_dma_cfg },
{ .compatible = "allwinner,sun8i-h3-dma", .data = &sun8i_h3_dma_cfg },
{ .compatible = "allwinner,sun8i-v3s-dma", .data = &sun8i_v3s_dma_cfg },
+ { .compatible = "allwinner,sun50i-a64-dma", .data = &sun50i_a64_dma_cfg },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sun6i_dma_match);
--
2.14.1
--
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