static int qcom_apcs_ipc_probe()

in qcom-apcs-ipc-mailbox.c [77:130]

• 42 lines of code
• 8 McCabe index (conditional complexity)

static int qcom_apcs_ipc_probe(struct platform_device *pdev)
{
	struct qcom_apcs_ipc *apcs;
	const struct qcom_apcs_ipc_data *apcs_data;
	struct regmap *regmap;
	void __iomem *base;
	unsigned long i;
	int ret;

	apcs = devm_kzalloc(&pdev->dev, sizeof(*apcs), GFP_KERNEL);
	if (!apcs)
		return -ENOMEM;

	base = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(base))
		return PTR_ERR(base);

	regmap = devm_regmap_init_mmio(&pdev->dev, base, &apcs_regmap_config);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	apcs_data = of_device_get_match_data(&pdev->dev);

	apcs->regmap = regmap;
	apcs->offset = apcs_data->offset;

	/* Initialize channel identifiers */
	for (i = 0; i < ARRAY_SIZE(apcs->mbox_chans); i++)
		apcs->mbox_chans[i].con_priv = (void *)i;

	apcs->mbox.dev = &pdev->dev;
	apcs->mbox.ops = &qcom_apcs_ipc_ops;
	apcs->mbox.chans = apcs->mbox_chans;
	apcs->mbox.num_chans = ARRAY_SIZE(apcs->mbox_chans);

	ret = devm_mbox_controller_register(&pdev->dev, &apcs->mbox);
	if (ret) {
		dev_err(&pdev->dev, "failed to register APCS IPC controller\n");
		return ret;
	}

	if (apcs_data->clk_name) {
		apcs->clk = platform_device_register_data(&pdev->dev,
							  apcs_data->clk_name,
							  PLATFORM_DEVID_AUTO,
							  NULL, 0);
		if (IS_ERR(apcs->clk))
			dev_err(&pdev->dev, "failed to register APCS clk\n");
	}

	platform_set_drvdata(pdev, apcs);

	return 0;
}