[PATCH v2 07/12] dmaengine: sun6i: support V3s SoC variant

Icenowy Zheng
2017-03-05T13:37:04Z

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>
---
Documentation/devicetree/bindings/dma/sun6i-dma.txt | 1 +
drivers/dma/sun6i-dma.c | 13 +++++++++++++
2 files changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/dma/sun6i-dma.txt b/Documentation/devicetree/bindings/dma/sun6i-dma.txt
index 6b267045f522..98fbe1a5c6dd 100644
--- 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 889fb24023cd..9565dcaa7651 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -1031,11 +1031,24 @@ 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);
--
2.11.1