2 * [origin: Linux kernel include/asm-arm/arch-at91/at91_pit.h]
4 * Copyright (C) 2007 Andrew Victor
5 * Copyright (C) 2007 Atmel Corporation.
7 * Periodic Interval Timer (PIT) - System peripherals regsters.
8 * Based on AT91SAM9261 datasheet revision D.
10 * SPDX-License-Identifier: GPL-2.0+
16 typedef struct at91_pit {
17 u32 mr; /* 0x00 Mode Register */
18 u32 sr; /* 0x04 Status Register */
19 u32 pivr; /* 0x08 Periodic Interval Value Register */
20 u32 piir; /* 0x0C Periodic Interval Image Register */
23 #define AT91_PIT_MR_IEN 0x02000000
24 #define AT91_PIT_MR_EN 0x01000000
25 #define AT91_PIT_MR_PIV_MASK(x) (x & 0x000fffff)
26 #define AT91_PIT_MR_PIV(x) (x & AT91_PIT_MR_PIV_MASK)
28 #ifdef CONFIG_AT91_LEGACY
30 #define AT91_PIT_MR (AT91_PIT + 0x00) /* Mode Register */
31 #define AT91_PIT_PITIEN (1 << 25) /* Timer Interrupt Enable */
32 #define AT91_PIT_PITEN (1 << 24) /* Timer Enabled */
33 #define AT91_PIT_PIV (0xfffff) /* Periodic Interval Value */
35 #define AT91_PIT_SR (AT91_PIT + 0x04) /* Status Register */
36 #define AT91_PIT_PITS (1 << 0) /* Timer Status */
38 #define AT91_PIT_PIVR (AT91_PIT + 0x08) /* Periodic Interval Value Register */
39 #define AT91_PIT_PIIR (AT91_PIT + 0x0c) /* Periodic Interval Image Register */
40 #define AT91_PIT_PICNT (0xfff << 20) /* Interval Counter */
41 #define AT91_PIT_CPIV (0xfffff) /* Inverval Value */
43 #endif /* CONFIG_AT91_LEGACY */