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Commit d3f797d9 authored by Viresh Kumar's avatar Viresh Kumar Committed by Vinod Koul
Browse files

dmaengine: dw_dma: add Device Tree probing capability 



SPEAr platforms now support DT and so must convert all drivers to support DT.
This patch adds DT probing support for Synopsys DMA controller and updates its
documentation too.

Signed-off-by: default avatarViresh Kumar <viresh.kumar@st.com>
Signed-off-by: default avatarVinod Koul <vinod.koul@linux.intel.com>
parent 3075528d

Documentation/devicetree/bindings/dma/snps-dma.txt

0 → 100644
+17 −0
Original line number Diff line number Diff line 
* Synopsys Designware DMA Controller



Required properties:

- compatible: "snps,dma-spear1340"

- reg: Address range of the DMAC registers

- interrupt-parent: Should be the phandle for the interrupt controller

  that services interrupts for this device

- interrupt: Should contain the DMAC interrupt number



Example:



	dma@fc000000 {

		compatible = "snps,dma-spear1340";

		reg = <0xfc000000 0x1000>;

		interrupt-parent = <&vic1>;

		interrupts = <12>;

	};

drivers/dma/dw_dmac.c

+10 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/of.h>

#include <linux/mm.h>

#include <linux/module.h>

#include <linux/platform_device.h>
@@ -1592,12 +1593,21 @@ static const struct dev_pm_ops dw_dev_pm_ops = { 
	.poweroff_noirq = dw_suspend_noirq,

};



#ifdef CONFIG_OF

static const struct of_device_id dw_dma_id_table[] = {

	{ .compatible = "snps,dma-spear1340" },

	{}

};

MODULE_DEVICE_TABLE(of, dw_dma_id_table);

#endif



static struct platform_driver dw_driver = {

	.remove		= __exit_p(dw_remove),

	.shutdown	= dw_shutdown,

	.driver = {

		.name	= "dw_dmac",

		.pm	= &dw_dev_pm_ops,

		.of_match_table = of_match_ptr(dw_dma_id_table),

	},

};