drivers/clk/meson/meson8b.c

Source file repositories/reference/linux-study-clean/drivers/clk/meson/meson8b.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/meson/meson8b.c
Extension
.c
Size
108947 bytes
Lines
3721
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 meson8b_clk_reset {
	struct reset_controller_dev reset;
	struct regmap *regmap;
};

static const struct pll_params_table sys_pll_params_table[] = {
	PLL_PARAMS(50, 1),
	PLL_PARAMS(51, 1),
	PLL_PARAMS(52, 1),
	PLL_PARAMS(53, 1),
	PLL_PARAMS(54, 1),
	PLL_PARAMS(55, 1),
	PLL_PARAMS(56, 1),
	PLL_PARAMS(57, 1),
	PLL_PARAMS(58, 1),
	PLL_PARAMS(59, 1),
	PLL_PARAMS(60, 1),
	PLL_PARAMS(61, 1),
	PLL_PARAMS(62, 1),
	PLL_PARAMS(63, 1),
	PLL_PARAMS(64, 1),
	PLL_PARAMS(65, 1),
	PLL_PARAMS(66, 1),
	PLL_PARAMS(67, 1),
	PLL_PARAMS(68, 1),
	PLL_PARAMS(84, 1),
	{ /* sentinel */ },
};

static struct clk_regmap meson8b_fixed_pll_dco = {
	.data = &(struct meson_clk_pll_data){
		.en = {
			.reg_off = HHI_MPLL_CNTL,
			.shift   = 30,
			.width   = 1,
		},
		.m = {
			.reg_off = HHI_MPLL_CNTL,
			.shift   = 0,
			.width   = 9,
		},
		.n = {
			.reg_off = HHI_MPLL_CNTL,
			.shift   = 9,
			.width   = 5,
		},
		.frac = {
			.reg_off = HHI_MPLL_CNTL2,
			.shift   = 0,
			.width   = 12,
		},
		.l = {
			.reg_off = HHI_MPLL_CNTL,
			.shift   = 31,
			.width   = 1,
		},
		.rst = {
			.reg_off = HHI_MPLL_CNTL,
			.shift   = 29,
			.width   = 1,
		},
	},
	.hw.init = &(struct clk_init_data){
		.name = "fixed_pll_dco",
		.ops = &meson_clk_pll_ro_ops,
		.parent_data = &(const struct clk_parent_data) {
			.fw_name = "xtal",
			.name = "xtal",
			.index = -1,
		},
		.num_parents = 1,
	},
};

static struct clk_regmap meson8b_fixed_pll = {
	.data = &(struct clk_regmap_div_data){
		.offset = HHI_MPLL_CNTL,
		.shift = 16,
		.width = 2,
		.flags = CLK_DIVIDER_POWER_OF_TWO,
	},
	.hw.init = &(struct clk_init_data){
		.name = "fixed_pll",
		.ops = &clk_regmap_divider_ro_ops,
		.parent_hws = (const struct clk_hw *[]) {
			&meson8b_fixed_pll_dco.hw
		},
		.num_parents = 1,
		/*
		 * This clock won't ever change at runtime so

Annotation

Implementation Notes