Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 7cffae42 authored by Thierry Reding's avatar Thierry Reding Committed by Joerg Roedel
Browse files

iommu: tegra/gart: Add device tree support 



This commit adds device tree support for the GART hardware available on
NVIDIA Tegra 20 SoCs.

Signed-off-by: default avatarThierry Reding <thierry.reding@avionic-design.de>
Acked-by: default avatarStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 543f3f33

Documentation/devicetree/bindings/iommu/nvidia,tegra20-gart.txt

0 → 100644
+14 −0
Original line number Diff line number Diff line 
NVIDIA Tegra 20 GART



Required properties:

- compatible: "nvidia,tegra20-gart"

- reg: Two pairs of cells specifying the physical address and size of

  the memory controller registers and the GART aperture respectively.



Example:



	gart: gart@7000f000 {

		compatible = "nvidia,tegra20-gart";

		reg = < 0x7000f000 0x00000100    /* controller registers */

		        0x58000000 0x02000000 >; /* GART aperture */

	};

drivers/iommu/tegra-gart.c

+11 −0
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
#include <linux/device.h>

#include <linux/io.h>

#include <linux/iommu.h>

#include <linux/of.h>



#include <asm/cacheflush.h>
@@ -422,6 +423,14 @@ const struct dev_pm_ops tegra_gart_pm_ops = { 
	.resume		= tegra_gart_resume,

};



#ifdef CONFIG_OF

static struct of_device_id tegra_gart_of_match[] __devinitdata = {

	{ .compatible = "nvidia,tegra20-gart", },

	{ },

};

MODULE_DEVICE_TABLE(of, tegra_gart_of_match);

#endif



static struct platform_driver tegra_gart_driver = {

	.probe		= tegra_gart_probe,

	.remove		= tegra_gart_remove,
@@ -429,6 +438,7 @@ static struct platform_driver tegra_gart_driver = { 
		.owner	= THIS_MODULE,

		.name	= "tegra-gart",

		.pm	= &tegra_gart_pm_ops,

		.of_match_table = of_match_ptr(tegra_gart_of_match),

	},

};
@@ -448,4 +458,5 @@ module_exit(tegra_gart_exit); 


MODULE_DESCRIPTION("IOMMU API for GART in Tegra20");

MODULE_AUTHOR("Hiroshi DOYU <hdoyu@nvidia.com>");

MODULE_ALIAS("platform:tegra-gart");

MODULE_LICENSE("GPL v2");