arch/arm/mach-at91/include/mach/at91_wdt.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * [origin: Linux kernel arch/arm/mach-at91/include/mach/at91_wdt.h]
 *
 * Copyright (C) 2008 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
 * Copyright (C) 2007 Andrew Victor
 * Copyright (C) 2018 Microchip Technology Inc.
 *
 * Watchdog Timer (WDT) - System peripherals regsters.
 * Based on AT91SAM9261 datasheet revision D.
 */

#ifndef AT91_WDT_H
#define AT91_WDT_H

#ifdef __ASSEMBLY__

#define AT91_ASM_WDT_MR	(ATMEL_BASE_WDT +  0x04)

#else

typedef struct at91_wdt {
	u32	cr;
	u32	mr;
	u32	sr;
} at91_wdt_t;

struct at91_wdt_priv {
	void __iomem *regs;
	u32 regval;
	u32 timeout;
};

#endif

/* Watchdog Control Register */
#define AT91_WDT_CR			0x00
#define AT91_WDT_CR_WDRSTT		1
#define AT91_WDT_CR_KEY			0xa5000000	/* KEY Password */

/* Watchdog Mode Register*/
#define AT91_WDT_MR			0X04
#define AT91_WDT_MR_WDV(x)		(x & 0xfff)
#define AT91_WDT_MR_WDFIEN		0x00001000
#define AT91_WDT_MR_WDRSTEN		0x00002000
#define AT91_WDT_MR_WDRPROC		0x00004000
#define AT91_WDT_MR_WDDIS		0x00008000
#define AT91_WDT_MR_WDD(x)		((x & 0xfff) << 16)
#define AT91_WDT_MR_WDDBGHLT		0x10000000
#define AT91_WDT_MR_WDIDLEHLT		0x20000000

/* Hardware timeout in seconds */
#define WDT_MAX_TIMEOUT		16
#define WDT_DEFAULT_TIMEOUT	2

#endif