[PATCH 08/10] dmaengine: sun6i: Add support for Allwinner A64 and compatibles

Stefan Brüns
2017-09-03T22:41:49Z

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>
---
drivers/dma/sun6i-dma.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index bd4c2e4a759b..4fae7ffad549 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -1076,6 +1076,16 @@ static struct sun6i_dma_config sun8i_h3_dma_cfg = {
.nr_max_vchans = 34,
.dmac_variant = DMAC_VARIANT_H3,
};
+
+/*
+ * The A64 binding uses the number of dma channels from the
+ * device tree node.
+ */
+static struct sun6i_dma_config sun50i_a64_dma_cfg = {
+ .nr_max_channels = 0,
+ .nr_max_requests = 0,
+ .nr_max_vchans = 0,
+ .dmac_variant = DMAC_VARIANT_H3,
};

static const struct of_device_id sun6i_dma_match[] = {
@@ -1083,6 +1093,7 @@ 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 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, sun6i_dma_match);
@@ -1090,6 +1101,7 @@ MODULE_DEVICE_TABLE(of, sun6i_dma_match);
static int sun6i_dma_probe(struct platform_device *pdev)
{
const struct of_device_id *device;
+ struct device_node *np = pdev->dev.of_node;
struct sun6i_dma_dev *sdc;
struct resource *res;
int ret, i;
--
2.14.1