1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2021 Mark Kettenis <kettenis@openbsd.org>
4 */
5
6 #define LOG_CATEGORY UCLASS_IOMMU
7
8 #include <common.h>
9 #include <dm.h>
10
11 #if (CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA))
dev_iommu_enable(struct udevice * dev)12 int dev_iommu_enable(struct udevice *dev)
13 {
14 struct ofnode_phandle_args args;
15 struct udevice *dev_iommu;
16 int i, count, ret = 0;
17
18 count = dev_count_phandle_with_args(dev, "iommus",
19 "#iommu-cells", 0);
20 for (i = 0; i < count; i++) {
21 ret = dev_read_phandle_with_args(dev, "iommus",
22 "#iommu-cells", 0, i, &args);
23 if (ret) {
24 debug("%s: dev_read_phandle_with_args failed: %d\n",
25 __func__, ret);
26 return ret;
27 }
28
29 ret = uclass_get_device_by_ofnode(UCLASS_IOMMU, args.node,
30 &dev_iommu);
31 if (ret) {
32 debug("%s: uclass_get_device_by_ofnode failed: %d\n",
33 __func__, ret);
34 return ret;
35 }
36 }
37
38 return 0;
39 }
40 #endif
41
42 UCLASS_DRIVER(iommu) = {
43 .id = UCLASS_IOMMU,
44 .name = "iommu",
45 };
46