drivers/clk/at91/at91sam9260.c

Source file repositories/reference/linux-study-clean/drivers/clk/at91/at91sam9260.c

File Facts

System
Linux kernel
Corpus path
drivers/clk/at91/at91sam9260.c
Extension
.c
Size
14856 bytes
Lines
516
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 sck {
	char *n;
	char *p;
	u8 id;
};

struct pck {
	char *n;
	u8 id;
};

struct at91sam926x_data {
	const struct clk_pll_layout *plla_layout;
	const struct clk_pll_characteristics *plla_characteristics;
	const struct clk_pll_layout *pllb_layout;
	const struct clk_pll_characteristics *pllb_characteristics;
	const struct clk_master_characteristics *mck_characteristics;
	const struct sck *sck;
	const struct pck *pck;
	u8 num_sck;
	u8 num_pck;
	u8 num_progck;
	bool has_slck;
};

static DEFINE_SPINLOCK(at91sam9260_mck_lock);

static const struct clk_master_characteristics sam9260_mck_characteristics = {
	.output = { .min = 0, .max = 105000000 },
	.divisors = { 1, 2, 4, 0 },
};

static u8 sam9260_plla_out[] = { 0, 2 };

static u16 sam9260_plla_icpll[] = { 1, 1 };

static const struct clk_range sam9260_plla_outputs[] = {
	{ .min = 80000000, .max = 160000000 },
	{ .min = 150000000, .max = 240000000 },
};

static const struct clk_pll_characteristics sam9260_plla_characteristics = {
	.input = { .min = 1000000, .max = 32000000 },
	.num_output = ARRAY_SIZE(sam9260_plla_outputs),
	.output = sam9260_plla_outputs,
	.icpll = sam9260_plla_icpll,
	.out = sam9260_plla_out,
};

static u8 sam9260_pllb_out[] = { 1 };

static u16 sam9260_pllb_icpll[] = { 1 };

static const struct clk_range sam9260_pllb_outputs[] = {
	{ .min = 70000000, .max = 130000000 },
};

static const struct clk_pll_characteristics sam9260_pllb_characteristics = {
	.input = { .min = 1000000, .max = 5000000 },
	.num_output = ARRAY_SIZE(sam9260_pllb_outputs),
	.output = sam9260_pllb_outputs,
	.icpll = sam9260_pllb_icpll,
	.out = sam9260_pllb_out,
};

static const struct sck at91sam9260_systemck[] = {
	{ .n = "uhpck", .p = "usbck",    .id = 6 },
	{ .n = "udpck", .p = "usbck",    .id = 7 },
	{ .n = "pck0",  .p = "prog0",    .id = 8 },
	{ .n = "pck1",  .p = "prog1",    .id = 9 },
};

static const struct pck at91sam9260_periphck[] = {
	{ .n = "pioA_clk",   .id = 2 },
	{ .n = "pioB_clk",   .id = 3 },
	{ .n = "pioC_clk",   .id = 4 },
	{ .n = "adc_clk",    .id = 5 },
	{ .n = "usart0_clk", .id = 6 },
	{ .n = "usart1_clk", .id = 7 },
	{ .n = "usart2_clk", .id = 8 },
	{ .n = "mci0_clk",   .id = 9 },
	{ .n = "udc_clk",    .id = 10 },
	{ .n = "twi0_clk",   .id = 11 },
	{ .n = "spi0_clk",   .id = 12 },
	{ .n = "spi1_clk",   .id = 13 },
	{ .n = "ssc0_clk",   .id = 14 },
	{ .n = "tc0_clk",    .id = 17 },
	{ .n = "tc1_clk",    .id = 18 },
	{ .n = "tc2_clk",    .id = 19 },
	{ .n = "ohci_clk",   .id = 20 },

Annotation

Implementation Notes