/**
* of_platform_device_create_pdata - Alloc, initialize and register an of_device
* @np: pointer to node to create device for
* @bus_id: name to assign device
* @platform_data: pointer to populate platform_data pointer with
* @parent: Linux device model parent device.
*
* Returns pointer to created platform device, or NULL if a device was not
* registered. Unavailable devices will not get registered.
*/
static struct platform_device *of_platform_device_create_pdata(
struct device_node *np,
const char *bus_id,
void *platform_data,
struct device *parent)
{
struct platform_device *dev;
if (!of_device_is_available(np) ||
of_node_test_and_set_flag(np, OF_POPULATED))
return NULL;
dev = of_device_alloc(np, bus_id, parent);
if (!dev)
goto err_clear_flag;
dev->dev.bus = &platform_bus_type;
dev->dev.platform_data = platform_data;
of_dma_configure(&dev->dev, dev->dev.of_node);
of_msi_configure(&dev->dev, dev->dev.of_node);
if (of_device_add(dev) != 0) {
of_dma_deconfigure(&dev->dev);
platform_device_put(dev);
goto err_clear_flag;
}
return dev;
err_clear_flag:
of_node_clear_flag(np, OF_POPULATED);
return NULL;
}
static int __init hidma_mgmt_of_populate_channels(struct device_node *np)
{
struct platform_device *pdev_parent = of_find_device_by_node(np);
struct platform_device_info pdevinfo;
struct of_phandle_args out_irq;
struct device_node *child;
struct resource *res;
const __be32 *cell;
int ret = 0, size, i, num;
u64 addr, addr_size;
for_each_available_child_of_node(np, child) {
struct resource *res_iter;
struct platform_device *new_pdev;
cell = of_get_property(child, "reg", &size);
if (!cell) {
ret = -EINVAL;
goto out;
}
size /= sizeof(*cell);
num = size /
(of_n_addr_cells(child) + of_n_size_cells(child)) + 1;
/* allocate a resource array */
res = kcalloc(num, sizeof(*res), GFP_KERNEL);
if (!res) {
ret = -ENOMEM;
goto out;
}
/* read each reg value */
i = 0;
res_iter = res;
while (i < size) {
addr = of_read_number(&cell[i],
of_n_addr_cells(child));
i += of_n_addr_cells(child);
addr_size = of_read_number(&cell[i],
of_n_size_cells(child));
i += of_n_size_cells(child);
res_iter->start = addr;
res_iter->end = res_iter->start + addr_size - 1;
res_iter->flags = IORESOURCE_MEM;
res_iter++;
}
ret = of_irq_parse_one(child, 0, &out_irq);
if (ret)
goto out;
res_iter->start = irq_create_of_mapping(&out_irq);
res_iter->name = "hidma event irq";
res_iter->flags = IORESOURCE_IRQ;
memset(&pdevinfo, 0, sizeof(pdevinfo));
pdevinfo.fwnode = &child->fwnode;
pdevinfo.parent = pdev_parent ? &pdev_parent->dev : NULL;
pdevinfo.name = child->name;
pdevinfo.id = object_counter++;
pdevinfo.res = res;
pdevinfo.num_res = num;
pdevinfo.data = NULL;
pdevinfo.size_data = 0;
pdevinfo.dma_mask = DMA_BIT_MASK(64);
new_pdev = platform_device_register_full(&pdevinfo);
if (IS_ERR(new_pdev)) {
ret = PTR_ERR(new_pdev);
goto out;
}
of_node_get(child);
new_pdev->dev.of_node = child;
of_dma_configure(&new_pdev->dev, child);
/*
* It is assumed that calling of_msi_configure is safe on
* platforms with or without MSI support.
*/
of_msi_configure(&new_pdev->dev, child);
of_node_put(child);
kfree(res);
res = NULL;
}
out:
kfree(res);
return ret;
}
