Source of fpga-region.c - linux-imx - PHYTEC BitBucket (Stash)

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    NULL,
};
ATTRIBUTE_GROUPS(fpga_region);
​
/**
 * fpga_region_create - alloc and init a struct fpga_region
 * @dev: device parent
 * @mgr: manager that programs this region
 * @get_bridges: optional function to get bridges to a list
 *
 * The caller of this function is responsible for freeing the resulting region
 * struct with fpga_region_free().  Using devm_fpga_region_create() instead is
 * recommended.
 *
 * Return: struct fpga_region or NULL
 */
struct fpga_region
*fpga_region_create(struct device *dev,
            struct fpga_manager *mgr,
            int (*get_bridges)(struct fpga_region *))
{
    struct fpga_region *region;
    int id, ret = 0;
​
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err_remove:
    ida_simple_remove(&fpga_region_ida, id);
err_free:
    kfree(region);
​
    return NULL;
}
EXPORT_SYMBOL_GPL(fpga_region_create);
​
/**
 * fpga_region_free - free a struct fpga_region
 * @region: FPGA region created by fpga_region_create
 * fpga_region_free - free a FPGA region created by fpga_region_create()
 * @region: FPGA region
 */
void fpga_region_free(struct fpga_region *region)
{
    ida_simple_remove(&fpga_region_ida, region->dev.id);
    kfree(region);
}
EXPORT_SYMBOL_GPL(fpga_region_free);
​
static void devm_fpga_region_release(struct device *dev, void *res)
{
    struct fpga_region *region = *(struct fpga_region **)res;
​
    fpga_region_free(region);
}
​
/**
 * devm_fpga_region_create - create and initialize a managed FPGA region struct
 * @dev: device parent
 * @mgr: manager that programs this region
 * @get_bridges: optional function to get bridges to a list
 *
 * This function is intended for use in a FPGA region driver's probe function.
 * After the region driver creates the region struct with
 * devm_fpga_region_create(), it should register it with fpga_region_register().
 * The region driver's remove function should call fpga_region_unregister().
 * The region struct allocated with this function will be freed automatically on
 * driver detach.  This includes the case of a probe function returning error
 * before calling fpga_region_register(), the struct will still get cleaned up.
 *
 * Return: struct fpga_region or NULL
 */
struct fpga_region
*devm_fpga_region_create(struct device *dev,
             struct fpga_manager *mgr,
             int (*get_bridges)(struct fpga_region *))
{
    struct fpga_region **ptr, *region;
​
    ptr = devres_alloc(devm_fpga_region_release, sizeof(*ptr), GFP_KERNEL);
    if (!ptr)
        return NULL;
​
    region = fpga_region_create(dev, mgr, get_bridges);
    if (!region) {
        devres_free(ptr);
    } else {
        *ptr = region;
        devres_add(dev, ptr);
    }
​
    return region;
}
EXPORT_SYMBOL_GPL(devm_fpga_region_create);
​
/**
 * fpga_region_register - register a FPGA region
 * @region: FPGA region created by fpga_region_create
 * @region: FPGA region
 *
 * Return: 0 or -errno
 */
int fpga_region_register(struct fpga_region *region)
{
    return device_add(&region->dev);
​
}
EXPORT_SYMBOL_GPL(fpga_region_register);
​
/**
 * fpga_region_unregister - unregister and free a FPGA region
 * fpga_region_unregister - unregister a FPGA region
 * @region: FPGA region
 *
 * This function is intended for use in a FPGA region driver's remove function.
 */
void fpga_region_unregister(struct fpga_region *region)
{
    device_unregister(&region->dev);
}
EXPORT_SYMBOL_GPL(fpga_region_unregister);
​
static void fpga_region_dev_release(struct device *dev)
{
    struct fpga_region *region = to_fpga_region(dev);
​
    fpga_region_free(region);
}
​
/**
 * fpga_region_init - init function for fpga_region class
 * Creates the fpga_region class and registers a reconfig notifier.
 */
static int __init fpga_region_init(void)
{
    fpga_region_class = class_create(THIS_MODULE, "fpga_region");
    if (IS_ERR(fpga_region_class))