The A64 SoC has the same dma engine as the H3 (sun8i), with a
reduced amount of physical channels. Add the proper config data
and compatible string to support it.

Signed-off-by: Stefan Br?ns <redacted>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 4 ++++
 drivers/dma/sun6i-dma.c                       | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index f96287d3043a..b86019238b77 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi

@@ -494,6 +494,8 @@
                        interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
                        clocks = <&ccu CLK_BUS_SPI0>, <&ccu CLK_SPI0>;
                        clock-names = "ahb", "mod";
+                       dmas = <&dma 23>, <&dma 23>;
+                       dma-names = "rx", "tx";

                        pinctrl-names = "default";
                        pinctrl-0 = <&spi0_pins>;
                        resets = <&ccu RST_BUS_SPI0>;

@@ -509,6 +511,8 @@
                        interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>;
                        clocks = <&ccu CLK_BUS_SPI1>, <&ccu CLK_SPI1>;
                        clock-names = "ahb", "mod";
+                       dmas = <&dma 24>, <&dma 24>;
+                       dma-names = "rx", "tx";
                        pinctrl-names = "default";
                        pinctrl-0 = <&spi1_pins>;
                        resets = <&ccu RST_BUS_SPI1>;

diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 5f4eee4513e5..6a17c5d63582 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c

@@ -1068,6 +1068,12 @@ static struct sun6i_dma_config sun8i_h3_dma_cfg = {
        .nr_max_vchans   = 34,
        .dmac_variant    = DMAC_VARIANT_H3,
 };
+
+static struct sun6i_dma_config sun50i_a64_dma_cfg = {
+       .nr_max_channels = 8,
+       .nr_max_requests = 27,
+       .nr_max_vchans   = 38,
+       .dmac_variant    = DMAC_VARIANT_H3,
 };

 static const struct of_device_id sun6i_dma_match[] = {

@@ -1075,6 +1081,7 @@ static const struct of_device_id sun6i_dma_match[] = {
        { .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,sun50i-a64-dma", .data = &sun50i_a64_dma_cfg },