diff options
Diffstat (limited to 'drivers/watchdog/at91sam9_wdt.h')
| -rw-r--r-- | drivers/watchdog/at91sam9_wdt.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/drivers/watchdog/at91sam9_wdt.h b/drivers/watchdog/at91sam9_wdt.h new file mode 100644 index 000000000..298d545df --- /dev/null +++ b/drivers/watchdog/at91sam9_wdt.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * drivers/watchdog/at91sam9_wdt.h + * + * Copyright (C) 2007 Andrew Victor + * Copyright (C) 2007 Atmel Corporation. + * Copyright (C) 2019 Microchip Technology Inc. and its subsidiaries + * + * Watchdog Timer (WDT) - System peripherals regsters. + * Based on AT91SAM9261 datasheet revision D. + * Based on SAM9X60 datasheet. + * + */ + +#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 */ +#define AT91_WDT_WDRSTEN BIT(13) /* Reset Processor */ +#define AT91_WDT_WDRPROC BIT(14) /* Timer Restart */ +#define AT91_WDT_WDDIS BIT(15) /* Watchdog Disable */ +#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 |