dmaengine: sun6i: Add support for Allwinner H3 (sun8i) variant

The H3 SoC has the same dma engine as the A31 (sun6i), with a
reduced amount of endpoints and physical channels. Add the proper
config data and compatible string to support it.

Signed-off-by: Jens Kuske <jenskuske@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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 9cdcba2..d13c136 100644 (file)
--- a/Documentation/devicetree/bindings/dma/sun6i-dma.txt
+++ b/Documentation/devicetree/bindings/dma/sun6i-dma.txt
@@ -4,7 +4,10 @@ This driver follows the generic DMA bindings defined in dma.txt.
 
 Required properties:
 
-- compatible:  Must be "allwinner,sun6i-a31-dma" or "allwinner,sun8i-a23-dma"
+- compatible:  Must be one of
+                 "allwinner,sun6i-a31-dma"
+                 "allwinner,sun8i-a23-dma"
+                 "allwinner,sun8i-h3-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 11e5365..842ff97 100644 (file)
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -891,9 +891,21 @@ static struct sun6i_dma_config sun8i_a23_dma_cfg = {
        .nr_max_vchans   = 37,
 };
 
+/*
+ * The H3 has 12 physical channels, a maximum DRQ port id of 27,
+ * and a total of 34 usable source and destination endpoints.
+ */
+
+static struct sun6i_dma_config sun8i_h3_dma_cfg = {
+       .nr_max_channels = 12,
+       .nr_max_requests = 27,
+       .nr_max_vchans   = 34,
+};
+
 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-h3-dma", .data = &sun8i_h3_dma_cfg },
        { /* sentinel */ }
 };