[PATCH 08/10] dmaengine: sun6i: Add support for Allwinner A64 and compatibles
From: Stefan Brüns <hidden>
Date: 2017-09-03 22:41:49
Also in:
linux-arm-kernel, lkml
Subsystem:
dma generic offload engine subsystem, the rest · Maintainers:
Vinod Koul, Linus Torvalds
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 <redacted> --- 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
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