drivers/clk/meson/meson-clkc-utils.c

Source file repositories/reference/linux-study-clean/drivers/clk/meson/meson-clkc-utils.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/meson/meson-clkc-utils.c
Extension
.c
Size
2621 bytes
Lines
112
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 (ret) {
			dev_err(dev, "registering %s clock failed\n",
				hw->init->name);
			return ret;
		}
	}

	return devm_of_clk_add_hw_provider(dev, meson_clk_hw_get, (void *)&data->hw_clks);
}

int meson_clkc_syscon_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *np;
	struct regmap *map;

	np = of_get_parent(dev->of_node);
	map = syscon_node_to_regmap(np);
	of_node_put(np);
	if (IS_ERR(map)) {
		dev_err(dev, "failed to get parent syscon regmap\n");
		return PTR_ERR(map);
	}

	return meson_clkc_init(dev, map);
}
EXPORT_SYMBOL_NS_GPL(meson_clkc_syscon_probe, "CLK_MESON");

int meson_clkc_mmio_probe(struct platform_device *pdev)
{
	const struct meson_clkc_data *data;
	struct device *dev = &pdev->dev;
	struct resource *res;
	void __iomem *base;
	struct regmap *map;
	struct regmap_config regmap_cfg = {
			.reg_bits	= 32,
			.val_bits	= 32,
			.reg_stride	= 4,
	};

	data = of_device_get_match_data(dev);
	if (!data)
		return -EINVAL;

	base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
	if (IS_ERR(base))
		return PTR_ERR(base);

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

	map = devm_regmap_init_mmio(dev, base, &regmap_cfg);
	if (IS_ERR(map))
		return PTR_ERR(map);

	return meson_clkc_init(dev, map);
}
EXPORT_SYMBOL_NS_GPL(meson_clkc_mmio_probe, "CLK_MESON");

MODULE_DESCRIPTION("Amlogic Clock Controller Utilities");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("CLK_MESON");

Annotation

Implementation Notes