static int wkup_m3_rproc_probe()

in wkup_m3_rproc.c [128:223]

• 78 lines of code
• 14 McCabe index (conditional complexity)

static int wkup_m3_rproc_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct wkup_m3_platform_data *pdata = dev->platform_data;
	/* umem always needs to be processed first */
	const char *mem_names[WKUPM3_MEM_MAX] = { "umem", "dmem" };
	struct wkup_m3_rproc *wkupm3;
	const char *fw_name;
	struct rproc *rproc;
	struct resource *res;
	const __be32 *addrp;
	u32 l4_offset = 0;
	u64 size;
	int ret;
	int i;

	ret = of_property_read_string(dev->of_node, "ti,pm-firmware",
				      &fw_name);
	if (ret) {
		dev_err(dev, "No firmware filename given\n");
		return -ENODEV;
	}

	pm_runtime_enable(&pdev->dev);
	ret = pm_runtime_get_sync(&pdev->dev);
	if (ret < 0) {
		dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
		goto err;
	}

	rproc = rproc_alloc(dev, "wkup_m3", &wkup_m3_rproc_ops,
			    fw_name, sizeof(*wkupm3));
	if (!rproc) {
		ret = -ENOMEM;
		goto err;
	}

	rproc->auto_boot = false;

	wkupm3 = rproc->priv;
	wkupm3->rproc = rproc;
	wkupm3->pdev = pdev;

	wkupm3->rsts = devm_reset_control_get_optional_shared(dev, "rstctrl");
	if (IS_ERR(wkupm3->rsts))
		return PTR_ERR(wkupm3->rsts);
	if (!wkupm3->rsts) {
		if (!(pdata && pdata->deassert_reset && pdata->assert_reset &&
		      pdata->reset_name)) {
			dev_err(dev, "Platform data missing!\n");
			ret = -ENODEV;
			goto err_put_rproc;
		}
	}

	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
						   mem_names[i]);
		wkupm3->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
		if (IS_ERR(wkupm3->mem[i].cpu_addr)) {
			dev_err(&pdev->dev, "devm_ioremap_resource failed for resource %d\n",
				i);
			ret = PTR_ERR(wkupm3->mem[i].cpu_addr);
			goto err_put_rproc;
		}
		wkupm3->mem[i].bus_addr = res->start;
		wkupm3->mem[i].size = resource_size(res);
		addrp = of_get_address(dev->of_node, i, &size, NULL);
		/*
		 * The wkupm3 has umem at address 0 in its view, so the device
		 * addresses for each memory region is computed as a relative
		 * offset of the bus address for umem, and therefore needs to be
		 * processed first.
		 */
		if (!strcmp(mem_names[i], "umem"))
			l4_offset = be32_to_cpu(*addrp);
		wkupm3->mem[i].dev_addr = be32_to_cpu(*addrp) - l4_offset;
	}

	dev_set_drvdata(dev, rproc);

	ret = rproc_add(rproc);
	if (ret) {
		dev_err(dev, "rproc_add failed\n");
		goto err_put_rproc;
	}

	return 0;

err_put_rproc:
	rproc_free(rproc);
err:
	pm_runtime_put_noidle(dev);
	pm_runtime_disable(dev);
	return ret;
}