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Groups > linux.kernel > #1657552
| Path | csiph.com!news.redatomik.org!aioe.org!bofh.it!news.nic.it!robomod |
|---|---|
| From | Icenowy Zheng <icenowy@aosc.io> |
| Newsgroups | linux.kernel |
| Subject | [PATCH 2/2] dmaengine: sun6i: support V3s SoC variant |
| Date | Mon, 05 Jun 2017 14:40:02 +0200 |
| Message-ID | <tOZsB-2TL-3@gated-at.bofh.it> (permalink) |
| References | <tOZsC-2TL-5@gated-at.bofh.it> |
| Sender | robomod@news.nic.it |
| List-ID | <linux-kernel.vger.kernel.org> |
| X-Mailing-List | linux-kernel@vger.kernel.org |
| Approved | robomod@news.nic.it |
| Lines | 61 |
| Organization | linux.* mail to news gateway |
| X-Original-Cc | dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com, Icenowy Zheng <icenowy@aosc.xyz> |
| X-Original-Date | Mon, 5 Jun 2017 20:33:48 +0800 |
| X-Original-Message-ID | <20170605123348.26137-3-icenowy@aosc.io> |
| X-Original-References | <20170605123348.26137-1-icenowy@aosc.io> |
| X-Original-Sender | linux-kernel-owner@vger.kernel.org |
| Xref | csiph.com linux.kernel:1657552 |
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From: Icenowy Zheng <icenowy@aosc.xyz>
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>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
---
Changes since the original codec patchset v3:
- Added Rob's ACK.
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 252b59c1d1d5..bcd496edc70f 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -1040,11 +1040,24 @@ 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);
--
2.12.2
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[PATCH 2/2] dmaengine: sun6i: support V3s SoC variant Icenowy Zheng <icenowy@aosc.io> - 2017-06-05 14:40 +0200
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