diff mbox

[v3,6/9] dmaengine: sun6i: support V3s SoC variant

Message ID 20170524100607.29790-7-icenowy@aosc.io (mailing list archive)
State New, archived
Headers show

Commit Message

Icenowy Zheng May 24, 2017, 10:06 a.m. UTC 
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>
---
Changes in v3:
- Added Chen-Yu's ACK.

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

Comments

Rob Herring (Arm) May 31, 2017, 4:57 p.m. UTC | #1 
On Wed, May 24, 2017 at 06:06:04PM +0800, Icenowy Zheng wrote:
> 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>
> ---
> Changes in v3:
> - Added Chen-Yu's ACK.
> 
>  Documentation/devicetree/bindings/dma/sun6i-dma.txt |  1 +
>  drivers/dma/sun6i-dma.c                             | 13 +++++++++++++
>  2 files changed, 14 insertions(+)

Acked-by: Rob Herring <robh@kernel.org>
diff mbox

Patch

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 69840cf6fe98..a57eaace8e7d 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -1034,11 +1034,24 @@  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);