55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* [origin: Linux kernel arch/arm/mach-at91/include/mach/at91_wdt.h]
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*
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* Copyright (C) 2008 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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* Copyright (C) 2007 Andrew Victor
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* Copyright (C) 2018 Microchip Technology Inc.
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*
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* Watchdog Timer (WDT) - System peripherals regsters.
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* Based on AT91SAM9261 datasheet revision D.
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*/
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#ifndef AT91_WDT_H
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#define AT91_WDT_H
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#ifdef __ASSEMBLY__
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#define AT91_ASM_WDT_MR (ATMEL_BASE_WDT + 0x04)
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#else
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typedef struct at91_wdt {
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u32 cr;
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u32 mr;
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u32 sr;
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} at91_wdt_t;
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struct at91_wdt_priv {
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void __iomem *regs;
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u32 regval;
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};
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#endif
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/* Watchdog Control Register */
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#define AT91_WDT_CR 0x00
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#define AT91_WDT_CR_WDRSTT 1
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#define AT91_WDT_CR_KEY 0xa5000000 /* KEY Password */
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/* Watchdog Mode Register*/
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#define AT91_WDT_MR 0X04
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#define AT91_WDT_MR_WDV(x) (x & 0xfff)
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#define AT91_WDT_MR_WDFIEN 0x00001000
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#define AT91_WDT_MR_WDRSTEN 0x00002000
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#define AT91_WDT_MR_WDRPROC 0x00004000
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#define AT91_WDT_MR_WDDIS 0x00008000
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#define AT91_WDT_MR_WDD(x) ((x & 0xfff) << 16)
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#define AT91_WDT_MR_WDDBGHLT 0x10000000
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#define AT91_WDT_MR_WDIDLEHLT 0x20000000
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/* Hardware timeout in seconds */
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#define WDT_MAX_TIMEOUT 16
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#endif
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