arch/arm/mach-at91/atmel_sfr.c

   1 /*
   2  * Copyright (C) 2015 Atmel Corporation
   3  *                    Wenyou Yang <wenyou.yang@atmel.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/io.h>
  10 #include <asm/arch/sama5_sfr.h>
  11
  12 void redirect_int_from_saic_to_aic(void)
  13 {
  14         struct atmel_sfr *sfr = (struct atmel_sfr *)ATMEL_BASE_SFR;
  15         u32 key32;
  16
  17         if (!(readl(&sfr->aicredir) & ATMEL_SFR_AICREDIR_NSAIC)) {
  18                 key32 = readl(&sfr->sn1) ^ ATMEL_SFR_AICREDIR_KEY;
  19                 writel((key32 | ATMEL_SFR_AICREDIR_NSAIC), &sfr->aicredir);
  20         }
  21 }