drivers/watchdog/nv_tco.h

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

File Facts

System
Linux kernel
Corpus path
drivers/watchdog/nv_tco.h
Extension
.h
Size
1848 bytes
Lines
61
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

#define TCO_RLD(base)	((base) + 0x00)	/* TCO Timer Reload and Current Value */
#define TCO_TMR(base)	((base) + 0x01)	/* TCO Timer Initial Value	*/

#define TCO_STS(base)	((base) + 0x04)	/* TCO Status Register		*/
/*
 * TCO Boot Status bit: set on TCO reset, reset by software or standby
 * power-good (survives reboots), unfortunately this bit is never
 * set.
 */
#  define TCO_STS_BOOT_STS	(1 << 9)
/*
 * first and 2nd timeout status bits, these also survive a warm boot,
 * and they work, so we use them.
 */
#  define TCO_STS_TCO_INT_STS	(1 << 1)
#  define TCO_STS_TCO2TO_STS	(1 << 10)
#  define TCO_STS_RESET		(TCO_STS_BOOT_STS | TCO_STS_TCO2TO_STS | \
				 TCO_STS_TCO_INT_STS)

#define TCO_CNT(base)	((base) + 0x08)	/* TCO Control Register	*/
#  define TCO_CNT_TCOHALT	(1 << 12)

#define MCP51_SMBUS_SETUP_B 0xe8
#  define MCP51_SMBUS_SETUP_B_TCO_REBOOT (1 << 25)

/*
 * The SMI_EN register is at the base io address + 0x04,
 * while TCOBASE is + 0x40.
 */
#define MCP51_SMI_EN(base)	((base) - 0x40 + 0x04)
#  define MCP51_SMI_EN_TCO	((1 << 4) | (1 << 5))

Annotation

Implementation Notes