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

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}
EXPORT_SYMBOL_GPL(fpga_mgr_unlock);
​
/**
 * fpga_mgr_create - create and initialize a FPGA manager struct
 * @dev:    fpga manager device from pdev
 * @name:   fpga manager name
 * @mops:   pointer to structure of fpga manager ops
 * @priv:   fpga manager private data
 *
 * The caller of this function is responsible for freeing the struct with
 * fpga_mgr_free().  Using devm_fpga_mgr_create() instead is recommended.
 *
 * Return: pointer to struct fpga_manager or NULL
 */
struct fpga_manager *fpga_mgr_create(struct device *dev, const char *name,
                     const struct fpga_manager_ops *mops,
                     void *priv)
{
    struct fpga_manager *mgr;
    int id, ret;
​
    if (!mops || !mops->write_complete || !mops->state ||
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error_device:
    ida_simple_remove(&fpga_mgr_ida, id);
error_kfree:
    kfree(mgr);
​
    return NULL;
}
EXPORT_SYMBOL_GPL(fpga_mgr_create);
​
/**
 * fpga_mgr_free - deallocate a FPGA manager
 * @mgr:    fpga manager struct created by fpga_mgr_create
 * fpga_mgr_free - free a FPGA manager created with fpga_mgr_create()
 * @mgr:    fpga manager struct
 */
void fpga_mgr_free(struct fpga_manager *mgr)
{
    ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
    kfree(mgr);
}
EXPORT_SYMBOL_GPL(fpga_mgr_free);
​
static void devm_fpga_mgr_release(struct device *dev, void *res)
{
    struct fpga_manager *mgr = *(struct fpga_manager **)res;
​
    fpga_mgr_free(mgr);
}
​
/**
 * devm_fpga_mgr_create - create and initialize a managed FPGA manager struct
 * @dev:    fpga manager device from pdev
 * @name:   fpga manager name
 * @mops:   pointer to structure of fpga manager ops
 * @priv:   fpga manager private data
 *
 * This function is intended for use in a FPGA manager driver's probe function.
 * After the manager driver creates the manager struct with
 * devm_fpga_mgr_create(), it should register it with fpga_mgr_register().  The
 * manager driver's remove function should call fpga_mgr_unregister().  The
 * manager 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_mgr_register(), the struct will still get cleaned up.
 *
 * Return: pointer to struct fpga_manager or NULL
 */
struct fpga_manager *devm_fpga_mgr_create(struct device *dev, const char *name,
                      const struct fpga_manager_ops *mops,
                      void *priv)
{
    struct fpga_manager **ptr, *mgr;
​
    ptr = devres_alloc(devm_fpga_mgr_release, sizeof(*ptr), GFP_KERNEL);
    if (!ptr)
        return NULL;
​
    mgr = fpga_mgr_create(dev, name, mops, priv);
    if (!mgr) {
        devres_free(ptr);
    } else {
        *ptr = mgr;
        devres_add(dev, ptr);
    }
​
    return mgr;
}
EXPORT_SYMBOL_GPL(devm_fpga_mgr_create);
​
/**
 * fpga_mgr_register - register a FPGA manager
 * @mgr:    fpga manager struct created by fpga_mgr_create
 * @mgr: fpga manager struct
 *
 * Return: 0 on success, negative error code otherwise.
 */
int fpga_mgr_register(struct fpga_manager *mgr)
{
    int ret;
​
    /*
     * Initialize framework state by requesting low level driver read state
     * from device.  FPGA may be in reset mode or may have been programmed
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    return 0;
​
error_device:
    ida_simple_remove(&fpga_mgr_ida, mgr->dev.id);
​
    return ret;
}
EXPORT_SYMBOL_GPL(fpga_mgr_register);
​
/**
 * fpga_mgr_unregister - unregister and free a FPGA manager
 * @mgr:    fpga manager struct
 * fpga_mgr_unregister - unregister a FPGA manager
 * @mgr: fpga manager struct
 *
 * This function is intended for use in a FPGA manager driver's remove function.
 */
void fpga_mgr_unregister(struct fpga_manager *mgr)
{
    dev_info(&mgr->dev, "%s %s\n", __func__, mgr->name);
​
    /*
     * If the low level driver provides a method for putting fpga into
     * a desired state upon unregister, do it.
     */
    if (mgr->mops->fpga_remove)
        mgr->mops->fpga_remove(mgr);
​
    device_unregister(&mgr->dev);
}
EXPORT_SYMBOL_GPL(fpga_mgr_unregister);
​
static void fpga_mgr_dev_release(struct device *dev)
{
    struct fpga_manager *mgr = to_fpga_manager(dev);
​
    fpga_mgr_free(mgr);
}
​
static int __init fpga_mgr_class_init(void)
{
    pr_info("FPGA manager framework\n");
​
    fpga_mgr_class = class_create(THIS_MODULE, "fpga_manager");
    if (IS_ERR(fpga_mgr_class))
        return PTR_ERR(fpga_mgr_class);
​