1 /* 2 * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef __IMX_WDOG_H__ 8 #define __IMX_WDOG_H__ 9 10 #include <arch.h> 11 #include <stdint.h> 12 13 struct wdog_regs { 14 uint16_t wcr; 15 uint16_t wsr; 16 uint16_t wrsr; 17 uint16_t wicr; 18 uint16_t wmcr; 19 }; 20 21 /* WCR bits */ 22 #define WCR_WDZST BIT(0) 23 #define WCR_WDBG BIT(1) 24 #define WCR_WDE BIT(2) 25 #define WCR_WDT BIT(3) 26 #define WCR_SRS BIT(4) 27 #define WCR_WDA BIT(5) 28 #define WCR_SRE BIT(6) 29 #define WCR_WDW BIT(7) 30 #define WCR_WT(x) ((x) << 8) 31 32 /* WSR bits */ 33 #define WSR_FIRST 0x5555 34 #define WSR_SECOND 0xAAAA 35 36 /* WRSR bits */ 37 #define WRSR_SFTW BIT(0) 38 #define WRSR_TOUT BIT(1) 39 #define WRSR_POR BIT(4) 40 41 /* WICR bits */ 42 static inline int wicr_calc_wict(int sec, int half_sec) 43 { 44 int wict_bits; 45 46 /* Represents WICR bits 7 - 0 */ 47 wict_bits = ((sec << 1) | (half_sec ? 1 : 0)); 48 49 return wict_bits; 50 } 51 52 #define WICR_WTIS BIT(14) 53 #define WICR_WIE BIT(15) 54 55 /* WMCR bits */ 56 #define WMCR_PDE BIT(0) 57 58 /* External facing API */ 59 void imx_wdog_init(void); 60 61 #endif /* __IMX_WDOG_H__ */ 62