lkml.org 
[lkml]   [2018]   [Jan]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 9/9] iommu/rockchip: Use OF_IOMMU to attach devices automatically
Date
Converts the rockchip-iommu driver to use the OF_IOMMU infrastructure,
which allows attaching master devices to their IOMMUs automatically
according to DT properties.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---

drivers/iommu/rockchip-iommu.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index ab18a80fdd12..c375a2522bfd 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -18,6 +18,7 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_iommu.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@@ -1091,6 +1092,13 @@ static struct iommu_group *rk_iommu_device_group(struct device *dev)
return ERR_PTR(ret);
}

+static int rk_iommu_of_xlate(struct device *dev,
+ struct of_phandle_args *spec)
+{
+ /* We don't have any phandle args, so just return 0. */
+ return 0;
+}
+
static const struct iommu_ops rk_iommu_ops = {
.domain_alloc = rk_iommu_domain_alloc,
.domain_free = rk_iommu_domain_free,
@@ -1104,6 +1112,7 @@ static const struct iommu_ops rk_iommu_ops = {
.iova_to_phys = rk_iommu_iova_to_phys,
.device_group = rk_iommu_device_group,
.pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP,
+ .of_xlate = rk_iommu_of_xlate,
};

static int rk_iommu_probe(struct platform_device *pdev)
@@ -1166,6 +1175,8 @@ static int rk_iommu_probe(struct platform_device *pdev)
return err;

iommu_device_set_ops(&iommu->iommu, &rk_iommu_ops);
+ iommu_device_set_fwnode(&iommu->iommu, &dev->of_node->fwnode);
+
err = iommu_device_register(&iommu->iommu);
if (err) {
iommu_device_sysfs_remove(&iommu->iommu);
@@ -1241,6 +1252,8 @@ static void __exit rk_iommu_exit(void)
subsys_initcall(rk_iommu_init);
module_exit(rk_iommu_exit);

+IOMMU_OF_DECLARE(rk_iommu_of, "rockchip,iommu");
+
MODULE_DESCRIPTION("IOMMU API for Rockchip");
MODULE_AUTHOR("Simon Xue <xxm@rock-chips.com> and Daniel Kurtz <djkurtz@chromium.org>");
MODULE_ALIAS("platform:rockchip-iommu");
--
2.11.0

\
 
 \ /
  Last update: 2018-01-14 23:22    [W:0.149 / U:0.500 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site