dmaengine: sun6i: support V3s SoC variant

Allwinner V3s has a DMA engine similar to the ones from A31, but with
fewer channels and DRQs.

Add support for it.

Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/Documentation/devicetree/bindings/dma/sun6i-dma.txt b/Documentation/devicetree/bindings/dma/sun6i-dma.txt
index 6b267045f5221c40524e9da19cf28bd1e2c3d8c6..98fbe1a5c6dd3d0cc366227eb2def392b797b4da 100644 (file)
--- a/Documentation/devicetree/bindings/dma/sun6i-dma.txt
+++ b/Documentation/devicetree/bindings/dma/sun6i-dma.txt
@@ -9,6 +9,7 @@ Required properties:
                  "allwinner,sun8i-a23-dma"
                  "allwinner,sun8i-a83t-dma"
                  "allwinner,sun8i-h3-dma"
+                 "allwinner,sun8i-v3s-dma"
 - reg:         Should contain the registers base address and length
 - interrupts:  Should contain a reference to the interrupt used by this device
 - clocks:      Should contain a reference to the parent AHB clock

diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 252b59c1d1d514ff3da6acb7ee5bf30ccc85ab9c..bcd496edc70f2b7c40cc35cfe09b021f7e1e82ae 100644 (file)
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -1040,11 +1040,24 @@ static struct sun6i_dma_config sun8i_h3_dma_cfg = {
        .nr_max_vchans   = 34,
 };
 
+/*
+ * The V3s have only 8 physical channels, a maximum DRQ port id of 23,
+ * and a total of 24 usable source and destination endpoints.
+ */
+
+static struct sun6i_dma_config sun8i_v3s_dma_cfg = {
+       .nr_max_channels = 8,
+       .nr_max_requests = 23,
+       .nr_max_vchans   = 24,
+       .gate_needed     = true,
+};
+
 static const struct of_device_id sun6i_dma_match[] = {
        { .compatible = "allwinner,sun6i-a31-dma", .data = &sun6i_a31_dma_cfg },
        { .compatible = "allwinner,sun8i-a23-dma", .data = &sun8i_a23_dma_cfg },
        { .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 },
        { /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, sun6i_dma_match);