1 /*
2  * Copyright 2008 Sascha Hauer, kernel@pengutronix.de
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation; either version 2
7  * of the License, or (at your option) any later version.
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program; if not, write to the Free Software
15  * Foundation, Inc., 51 Franklin Street, Fifth Floor,
16  * Boston, MA  02110-1301, USA.
17  */
18 
19 #include <linux/kernel.h>
20 #include <linux/slab.h>
21 #include <linux/init.h>
22 #include <linux/platform_device.h>
23 #include <linux/amba/bus.h>
24 
mxs_add_platform_device_dmamask(const char * name,int id,const struct resource * res,unsigned int num_resources,const void * data,size_t size_data,u64 dmamask)25 struct platform_device *__init mxs_add_platform_device_dmamask(
26 		const char *name, int id,
27 		const struct resource *res, unsigned int num_resources,
28 		const void *data, size_t size_data, u64 dmamask)
29 {
30 	int ret = -ENOMEM;
31 	struct platform_device *pdev;
32 
33 	pdev = platform_device_alloc(name, id);
34 	if (!pdev)
35 		goto err;
36 
37 	if (dmamask) {
38 		/*
39 		 * This memory isn't freed when the device is put,
40 		 * I don't have a nice idea for that though.  Conceptually
41 		 * dma_mask in struct device should not be a pointer.
42 		 * See http://thread.gmane.org/gmane.linux.kernel.pci/9081
43 		 */
44 		pdev->dev.dma_mask =
45 			kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
46 		if (!pdev->dev.dma_mask)
47 			/* ret is still -ENOMEM; */
48 			goto err;
49 
50 		*pdev->dev.dma_mask = dmamask;
51 		pdev->dev.coherent_dma_mask = dmamask;
52 	}
53 
54 	if (res) {
55 		ret = platform_device_add_resources(pdev, res, num_resources);
56 		if (ret)
57 			goto err;
58 	}
59 
60 	if (data) {
61 		ret = platform_device_add_data(pdev, data, size_data);
62 		if (ret)
63 			goto err;
64 	}
65 
66 	ret = platform_device_add(pdev);
67 	if (ret) {
68 err:
69 		if (dmamask)
70 			kfree(pdev->dev.dma_mask);
71 		platform_device_put(pdev);
72 		return ERR_PTR(ret);
73 	}
74 
75 	return pdev;
76 }
77 
mxs_add_amba_device(const struct amba_device * dev)78 int __init mxs_add_amba_device(const struct amba_device *dev)
79 {
80 	struct amba_device *adev = amba_device_alloc(dev->dev.init_name,
81 		dev->res.start, resource_size(&dev->res));
82 
83 	if (!adev) {
84 		pr_err("%s: failed to allocate memory", __func__);
85 		return -ENOMEM;
86 	}
87 
88 	adev->irq[0] = dev->irq[0];
89 	adev->irq[1] = dev->irq[1];
90 
91 	return amba_device_add(adev, &iomem_resource);
92 }
93 
94 struct device mxs_apbh_bus = {
95 	.init_name	= "mxs_apbh",
96 	.parent         = &platform_bus,
97 };
98 
mxs_device_init(void)99 static int __init mxs_device_init(void)
100 {
101 	return device_register(&mxs_apbh_bus);
102 }
103 core_initcall(mxs_device_init);
104