drivers/clk/qcom/apss-ipq-pll.c

Source file repositories/reference/linux-study-clean/drivers/clk/qcom/apss-ipq-pll.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/qcom/apss-ipq-pll.c
Extension
.c
Size
6072 bytes
Lines
229
Domain
Driver Families
Bucket
drivers/clk
Inferred role
Driver Families: implementation source
Status
source 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

struct apss_pll_data {
	int pll_type;
	struct clk_alpha_pll *pll;
	const struct alpha_pll_config *pll_config;
};

static const struct apss_pll_data ipq5018_pll_data = {
	.pll_type = CLK_ALPHA_PLL_TYPE_STROMER,
	.pll = &ipq_pll_stromer,
	.pll_config = &ipq5018_pll_config,
};

static const struct apss_pll_data ipq5332_pll_data = {
	.pll_type = CLK_ALPHA_PLL_TYPE_STROMER_PLUS,
	.pll = &ipq_pll_stromer_plus,
	.pll_config = &ipq5332_pll_config,
};

static const struct apss_pll_data ipq8074_pll_data = {
	.pll_type = CLK_ALPHA_PLL_TYPE_HUAYRA,
	.pll = &ipq_pll_huayra,
	.pll_config = &ipq8074_pll_config,
};

static const struct apss_pll_data ipq6018_pll_data = {
	.pll_type = CLK_ALPHA_PLL_TYPE_HUAYRA,
	.pll = &ipq_pll_huayra,
	.pll_config = &ipq6018_pll_config,
};

static const struct apss_pll_data ipq9574_pll_data = {
	.pll_type = CLK_ALPHA_PLL_TYPE_HUAYRA,
	.pll = &ipq_pll_huayra,
	.pll_config = &ipq9574_pll_config,
};

static const struct regmap_config ipq_pll_regmap_config = {
	.reg_bits		= 32,
	.reg_stride		= 4,
	.val_bits		= 32,
	.max_register		= 0x40,
};

static int apss_ipq_pll_probe(struct platform_device *pdev)
{
	const struct apss_pll_data *data;
	struct device *dev = &pdev->dev;
	struct regmap *regmap;
	void __iomem *base;
	int ret;

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

	regmap = devm_regmap_init_mmio(dev, base, &ipq_pll_regmap_config);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	data = of_device_get_match_data(&pdev->dev);
	if (!data)
		return -ENODEV;

	if (data->pll_type == CLK_ALPHA_PLL_TYPE_HUAYRA)
		clk_alpha_pll_configure(data->pll, regmap, data->pll_config);
	else if (data->pll_type == CLK_ALPHA_PLL_TYPE_STROMER ||
		 data->pll_type == CLK_ALPHA_PLL_TYPE_STROMER_PLUS)
		clk_stromer_pll_configure(data->pll, regmap, data->pll_config);

	ret = devm_clk_register_regmap(dev, &data->pll->clkr);
	if (ret)
		return ret;

	return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get,
					   &data->pll->clkr.hw);
}

static const struct of_device_id apss_ipq_pll_match_table[] = {
	{ .compatible = "qcom,ipq5018-a53pll", .data = &ipq5018_pll_data },
	{ .compatible = "qcom,ipq5332-a53pll", .data = &ipq5332_pll_data },
	{ .compatible = "qcom,ipq6018-a53pll", .data = &ipq6018_pll_data },
	{ .compatible = "qcom,ipq8074-a53pll", .data = &ipq8074_pll_data },
	{ .compatible = "qcom,ipq9574-a73pll", .data = &ipq9574_pll_data },
	{ }
};
MODULE_DEVICE_TABLE(of, apss_ipq_pll_match_table);

static struct platform_driver apss_ipq_pll_driver = {
	.probe = apss_ipq_pll_probe,
	.driver = {

Annotation

Implementation Notes