dmaengine: sun6i: Add support for Allwinner A64 and compatibles

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@rwth-aachen.de>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index f27b126..0cabb48 100644 (file)
--- 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 = {
 };
 
 /*
+ * 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.
  */
@@ -1148,6 +1167,7 @@ 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);