arch/arm/include/asm/arch-at91/at91_pit.h

   1 /*
   2  * [origin: Linux kernel include/asm-arm/arch-at91/at91_pit.h]
   3  *
   4  * Copyright (C) 2007 Andrew Victor
   5  * Copyright (C) 2007 Atmel Corporation.
   6  *
   7  * Periodic Interval Timer (PIT) - System peripherals regsters.
   8  * Based on AT91SAM9261 datasheet revision D.
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12
  13 #ifndef AT91_PIT_H
  14 #define AT91_PIT_H
  15
  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 */
  21 } at91_pit_t;
  22
  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)
  27
  28 #ifdef CONFIG_AT91_LEGACY
  29
  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 */
  34
  35 #define AT91_PIT_SR             (AT91_PIT + 0x04)       /* Status Register */
  36 #define         AT91_PIT_PITS           (1 << 0)                /* Timer Status */
  37
  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 */
  42
  43 #endif /* CONFIG_AT91_LEGACY */
  44 #endif