drivers/watchdog/at91sam9_wdt.h

Source file repositories/reference/linux-study-clean/drivers/watchdog/at91sam9_wdt.h

File Facts

System
Linux kernel
Corpus path
drivers/watchdog/at91sam9_wdt.h
Extension
.h
Size
2225 bytes
Lines
64
Domain
Driver Families
Bucket
drivers/watchdog
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

#ifndef AT91_WDT_H
#define AT91_WDT_H

#include <linux/bits.h>

#define AT91_WDT_CR		0x00			/* Watchdog Control Register */
#define  AT91_WDT_WDRSTT	BIT(0)			/* Restart */
#define  AT91_WDT_KEY		(0xa5UL << 24)		/* KEY Password */

#define AT91_WDT_MR		0x04			/* Watchdog Mode Register */
#define  AT91_WDT_WDV		(0xfffUL << 0)		/* Counter Value */
#define  AT91_WDT_SET_WDV(x)	((x) & AT91_WDT_WDV)
#define  AT91_SAM9X60_PERIODRST	BIT(4)		/* Period Reset */
#define  AT91_SAM9X60_RPTHRST	BIT(5)		/* Minimum Restart Period */
#define  AT91_WDT_WDFIEN	BIT(12)		/* Fault Interrupt Enable */
#define  AT91_SAM9X60_WDDIS	BIT(12)		/* Watchdog Disable (SAM9X60, SAMA7G5, SAM9X75) */
#define  AT91_WDT_WDRSTEN	BIT(13)		/* Reset Processor */
#define  AT91_WDT_WDRPROC	BIT(14)		/* Timer Restart */
#define  AT91_WDT_WDDIS		BIT(15)		/* Watchdog Disable (SAMA5, AT91SAM9261) */
#define  AT91_WDT_WDD		(0xfffUL << 16)		/* Delta Value */
#define  AT91_WDT_SET_WDD(x)	(((x) << 16) & AT91_WDT_WDD)
#define  AT91_WDT_WDDBGHLT	BIT(28)		/* Debug Halt */
#define  AT91_WDT_WDIDLEHLT	BIT(29)		/* Idle Halt */

#define AT91_WDT_SR		0x08		/* Watchdog Status Register */
#define  AT91_WDT_WDUNF		BIT(0)		/* Watchdog Underflow */
#define  AT91_WDT_WDERR		BIT(1)		/* Watchdog Error */

/* Watchdog Timer Value Register */
#define AT91_SAM9X60_VR		0x08

/* Watchdog Window Level Register */
#define AT91_SAM9X60_WLR	0x0c
/* Watchdog Period Value */
#define  AT91_SAM9X60_COUNTER	(0xfffUL << 0)
#define  AT91_SAM9X60_SET_COUNTER(x)	((x) & AT91_SAM9X60_COUNTER)

/* Interrupt Enable Register */
#define AT91_SAM9X60_IER	0x14
/* Period Interrupt Enable */
#define  AT91_SAM9X60_PERINT	BIT(0)
/* Interrupt Disable Register */
#define AT91_SAM9X60_IDR	0x18
/* Interrupt Status Register */
#define AT91_SAM9X60_ISR	0x1c

#endif

Annotation

Implementation Notes