drivers/clk/sprd/common.c

Source file repositories/reference/linux-study-clean/drivers/clk/sprd/common.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/sprd/common.c
Extension
.c
Size
2651 bytes
Lines
114
Domain
Driver Families
Bucket
drivers/clk
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (IS_ERR(regmap)) {
			pr_err("%s: failed to get syscon regmap\n", __func__);
			return PTR_ERR(regmap);
		}
	} else if (of_device_is_compatible(np =	of_get_parent(node), "syscon") ||
		   (of_node_put(np), 0)) {
		regmap = device_node_to_regmap(np);
		of_node_put(np);
		if (IS_ERR(regmap)) {
			dev_err(dev, "failed to get regmap from its parent.\n");
			return PTR_ERR(regmap);
		}
	} else {
		base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
		if (IS_ERR(base))
			return PTR_ERR(base);

		reg_config.max_register = resource_size(res) - reg_config.reg_stride;

		regmap = devm_regmap_init_mmio(&pdev->dev, base,
					       &reg_config);
		if (IS_ERR(regmap)) {
			pr_err("failed to init regmap\n");
			return PTR_ERR(regmap);
		}
	}

	sprd_clk_set_regmap(desc, regmap);

	return 0;
}
EXPORT_SYMBOL_GPL(sprd_clk_regmap_init);

int sprd_clk_probe(struct device *dev, struct clk_hw_onecell_data *clkhw)
{
	int i, ret;
	struct clk_hw *hw;

	for (i = 0; i < clkhw->num; i++) {
		const char *name;

		hw = clkhw->hws[i];
		if (!hw)
			continue;

		name = hw->init->name;
		ret = devm_clk_hw_register(dev, hw);
		if (ret) {
			dev_err(dev, "Couldn't register clock %d - %s\n",
				i, name);
			return ret;
		}
	}

	ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, clkhw);
	if (ret)
		dev_err(dev, "Failed to add clock provider\n");

	return ret;
}
EXPORT_SYMBOL_GPL(sprd_clk_probe);

MODULE_DESCRIPTION("Spreadtrum clock infrastructure");
MODULE_LICENSE("GPL v2");

Annotation

Implementation Notes