arch/arm/plat-mxc/devices.c

   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/err.h>
  23 #include <linux/platform_device.h>
  24 #include <mach/common.h>
  25
  26 int __init mxc_register_device(struct platform_device *pdev, void *data)
  27 {
  28         int ret;
  29
  30         pdev->dev.platform_data = data;
  31
  32         ret = platform_device_register(pdev);
  33         if (ret)
  34                 pr_debug("Unable to register platform device '%s': %d\n",
  35                          pdev->name, ret);
  36
  37         return ret;
  38 }
  39
  40 struct platform_device *__init imx_add_platform_device_dmamask(
  41                 const char *name, int id,
  42                 const struct resource *res, unsigned int num_resources,
  43                 const void *data, size_t size_data, u64 dmamask)
  44 {
  45         int ret = -ENOMEM;
  46         struct platform_device *pdev;
  47
  48         pdev = platform_device_alloc(name, id);
  49         if (!pdev)
  50                 goto err;
  51
  52         if (dmamask) {
  53                 /*
  54                  * This memory isn't freed when the device is put,
  55                  * I don't have a nice idea for that though.  Conceptually
  56                  * dma_mask in struct device should not be a pointer.
  57                  * See http://thread.gmane.org/gmane.linux.kernel.pci/9081
  58                  */
  59                 pdev->dev.dma_mask =
  60                         kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
  61                 if (!pdev->dev.dma_mask)
  62                         /* ret is still -ENOMEM; */
  63                         goto err;
  64
  65                 *pdev->dev.dma_mask = dmamask;
  66                 pdev->dev.coherent_dma_mask = dmamask;
  67         }
  68
  69         if (res) {
  70                 ret = platform_device_add_resources(pdev, res, num_resources);
  71                 if (ret)
  72                         goto err;
  73         }
  74
  75         if (data) {
  76                 ret = platform_device_add_data(pdev, data, size_data);
  77                 if (ret)
  78                         goto err;
  79         }
  80
  81         ret = platform_device_add(pdev);
  82         if (ret) {
  83 err:
  84                 if (dmamask)
  85                         kfree(pdev->dev.dma_mask);
  86                 platform_device_put(pdev);
  87                 return ERR_PTR(ret);
  88         }
  89
  90         return pdev;
  91 }
  92
  93 struct device mxc_aips_bus = {
  94         .init_name      = "mxc_aips",
  95         .parent         = &platform_bus,
  96 };
  97
  98 struct device mxc_ahb_bus = {
  99         .init_name      = "mxc_ahb",
 100         .parent         = &platform_bus,
 101 };
 102
 103 static int __init mxc_device_init(void)
 104 {
 105         int ret;
 106
 107         ret = device_register(&mxc_aips_bus);
 108         if (IS_ERR_VALUE(ret))
 109                 goto done;
 110
 111         ret = device_register(&mxc_ahb_bus);
 112
 113 done:
 114         return ret;
 115 }
 116 core_initcall(mxc_device_init);