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devices.c

/*
 * Copyright 2008 Sascha Hauer, kernel@pengutronix.de
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/amba/bus.h>

struct platform_device *__init 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)
{
      int ret = -ENOMEM;
      struct platform_device *pdev;

      pdev = platform_device_alloc(name, id);
      if (!pdev)
            goto err;

      if (dmamask) {
            /*
             * This memory isn't freed when the device is put,
             * I don't have a nice idea for that though.  Conceptually
             * dma_mask in struct device should not be a pointer.
             * See http://thread.gmane.org/gmane.linux.kernel.pci/9081
             */
            pdev->dev.dma_mask =
                  kmalloc(sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
            if (!pdev->dev.dma_mask)
                  /* ret is still -ENOMEM; */
                  goto err;

            *pdev->dev.dma_mask = dmamask;
            pdev->dev.coherent_dma_mask = dmamask;
      }

      if (res) {
            ret = platform_device_add_resources(pdev, res, num_resources);
            if (ret)
                  goto err;
      }

      if (data) {
            ret = platform_device_add_data(pdev, data, size_data);
            if (ret)
                  goto err;
      }

      ret = platform_device_add(pdev);
      if (ret) {
err:
            platform_device_put(pdev);
            return ERR_PTR(ret);
      }

      return pdev;
}

int __init mxs_add_amba_device(const struct amba_device *dev)
{
      struct amba_device *adev = kmalloc(sizeof(*adev), GFP_KERNEL);

      if (!adev) {
            pr_err("%s: failed to allocate memory", __func__);
            return -ENOMEM;
      }

      *adev = *dev;

      return amba_device_register(adev, &iomem_resource);
}

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