drivers/irqchip/irq-stm32-exti.c

Source file repositories/reference/linux-study-clean/drivers/irqchip/irq-stm32-exti.c

File Facts

System
Linux kernel
Corpus path
drivers/irqchip/irq-stm32-exti.c
Extension
.c
Size
10407 bytes
Lines
412
Domain
Driver Families
Bucket
drivers/irqchip
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 stm32_exti_bank {
	u32 imr_ofst;
	u32 emr_ofst;
	u32 rtsr_ofst;
	u32 ftsr_ofst;
	u32 swier_ofst;
	u32 rpr_ofst;
};

struct stm32_exti_drv_data {
	const struct stm32_exti_bank **exti_banks;
	const u8 *desc_irqs;
	u32 bank_nr;
};

struct stm32_exti_chip_data {
	struct stm32_exti_host_data *host_data;
	const struct stm32_exti_bank *reg_bank;
	u32 wake_active;
	u32 mask_cache;
	u32 rtsr_cache;
	u32 ftsr_cache;
	u32 event_reserved;
};

struct stm32_exti_host_data {
	void __iomem *base;
	struct device *dev;
	struct stm32_exti_chip_data *chips_data;
	const struct stm32_exti_drv_data *drv_data;
};

static const struct stm32_exti_bank stm32f4xx_exti_b1 = {
	.imr_ofst	= 0x00,
	.emr_ofst	= 0x04,
	.rtsr_ofst	= 0x08,
	.ftsr_ofst	= 0x0C,
	.swier_ofst	= 0x10,
	.rpr_ofst	= 0x14,
};

static const struct stm32_exti_bank *stm32f4xx_exti_banks[] = {
	&stm32f4xx_exti_b1,
};

static const struct stm32_exti_drv_data stm32f4xx_drv_data = {
	.exti_banks = stm32f4xx_exti_banks,
	.bank_nr = ARRAY_SIZE(stm32f4xx_exti_banks),
};

static const struct stm32_exti_bank stm32h7xx_exti_b1 = {
	.imr_ofst	= 0x80,
	.emr_ofst	= 0x84,
	.rtsr_ofst	= 0x00,
	.ftsr_ofst	= 0x04,
	.swier_ofst	= 0x08,
	.rpr_ofst	= 0x88,
};

static const struct stm32_exti_bank stm32h7xx_exti_b2 = {
	.imr_ofst	= 0x90,
	.emr_ofst	= 0x94,
	.rtsr_ofst	= 0x20,
	.ftsr_ofst	= 0x24,
	.swier_ofst	= 0x28,
	.rpr_ofst	= 0x98,
};

static const struct stm32_exti_bank stm32h7xx_exti_b3 = {
	.imr_ofst	= 0xA0,
	.emr_ofst	= 0xA4,
	.rtsr_ofst	= 0x40,
	.ftsr_ofst	= 0x44,
	.swier_ofst	= 0x48,
	.rpr_ofst	= 0xA8,
};

static const struct stm32_exti_bank *stm32h7xx_exti_banks[] = {
	&stm32h7xx_exti_b1,
	&stm32h7xx_exti_b2,
	&stm32h7xx_exti_b3,
};

static const struct stm32_exti_drv_data stm32h7xx_drv_data = {
	.exti_banks = stm32h7xx_exti_banks,
	.bank_nr = ARRAY_SIZE(stm32h7xx_exti_banks),
};

static unsigned long stm32_exti_pending(struct irq_chip_generic *gc)
{

Annotation

Implementation Notes