[PATCHv3][ 2/5] dma: ipu: Add devicetree support.
From: Denis Carikli <hidden>
Date: 2013-10-23 12:43:46
Also in:
linux-devicetree
Subsystem:
dma generic offload engine subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Vinod Koul, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Cc: Rob Herring <redacted> Cc: Pawel Moll <redacted> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Stephen Warren <redacted> Cc: Ian Campbell <redacted> Cc: devicetree at vger.kernel.org Cc: Vinod Koul <redacted> Cc: Dan Williams <redacted> Cc: Sascha Hauer <kernel@pengutronix.de> Cc: linux-arm-kernel at lists.infradead.org Cc: Eric B?nard <redacted> Signed-off-by: Denis Carikli <redacted> --- ChangeLog v2->v3: - The DMA channels are not exposed anymore in order to look more like the IPUv3 bindings. --- .../devicetree/bindings/dma/fsl-imx-ipu.txt | 33 ++++++++++++++++++++ drivers/dma/ipu/ipu_idmac.c | 8 +++++ 2 files changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/fsl-imx-ipu.txt
diff --git a/Documentation/devicetree/bindings/dma/fsl-imx-ipu.txt b/Documentation/devicetree/bindings/dma/fsl-imx-ipu.txt
new file mode 100644
index 0000000..ee66e1a
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/fsl-imx-ipu.txt@@ -0,0 +1,33 @@ +* Freescale Image Processing Unit DMA support for i.MX3x. + +This dma driver supports the imx31 and imx35 devices. + +Required properties: +- compatible : Should be "fsl,imx31-ipu". +- reg : Should contain DMA registers location and length +- interrupts : First item should be DMA interrupt, second one is optional and + should contain DMA Error interrupt. + +Example: + + ipu: ipu at 53fc0000 { + compatible = "fsl,imx31-ipu"; + reg = < 0x53fc0000 0x5f + 0x53fc0088 0x2b >; + interrupts = <42 41>; + clocks = <&clks 55>; + clock-names = ""; + status = "disabled"; + }; + +* DMA client + +Clients have to specify the DMA requests with phandles in a list. + +Required properties: +Example: + + lcdc: mx3fb at 53fc00b4 { + ... + ... + };
diff --git a/drivers/dma/ipu/ipu_idmac.c b/drivers/dma/ipu/ipu_idmac.c
index cb9c0bc..d853ee1 100644
--- a/drivers/dma/ipu/ipu_idmac.c
+++ b/drivers/dma/ipu/ipu_idmac.c@@ -22,6 +22,7 @@ #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> +#include <linux/of.h> #include <linux/dma/ipu-dma.h> #include "../dmaengine.h"
@@ -1768,6 +1769,12 @@ static int ipu_remove(struct platform_device *pdev) return 0; } +static const struct of_device_id ipu_dma_of_dev_id[] = { + { .compatible = "fsl,imx31-ipu", }, + { /* Sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ipu_dma_of_dev_id); + /* * We need two MEM resources - with IPU-common and Image Converter registers, * including PF_CONF and IDMAC_* registers, and two IRQs - function and error
@@ -1775,6 +1782,7 @@ static int ipu_remove(struct platform_device *pdev) static struct platform_driver ipu_platform_driver = { .driver = { .name = "ipu-core", + .of_match_table = of_match_ptr(ipu_dma_of_dev_id), .owner = THIS_MODULE, }, .remove = ipu_remove,
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1.7.9.5