arch/arm/mach-shmobile/pm-r8a7791.c

   1 /*
   2  * r8a7791 Power management support
   3  *
   4  * Copyright (C) 2014  Renesas Electronics Corporation
   5  * Copyright (C) 2011  Renesas Solutions Corp.
   6  * Copyright (C) 2011  Magnus Damm
   7  *
   8  * This file is subject to the terms and conditions of the GNU General Public
   9  * License.  See the file "COPYING" in the main directory of this archive
  10  * for more details.
  11  */
  12
  13 #include <linux/kernel.h>
  14
  15 #include <asm/io.h>
  16
  17 #include "pm-rcar.h"
  18 #include "r8a7791.h"
  19
  20 /* SYSC */
  21 #define SYSCIER 0x0c
  22 #define SYSCIMR 0x10
  23
  24 #if defined(CONFIG_SMP)
  25
  26 static void __init r8a7791_sysc_init(void)
  27 {
  28         void __iomem *base = rcar_sysc_init(0xe6180000);
  29
  30         /* enable all interrupt sources, but do not use interrupt handler */
  31         iowrite32(0x0131000e, base + SYSCIER);
  32         iowrite32(0, base + SYSCIMR);
  33 }
  34
  35 #else /* CONFIG_SMP */
  36
  37 static inline void r8a7791_sysc_init(void) {}
  38
  39 #endif /* CONFIG_SMP */
  40
  41 void __init r8a7791_pm_init(void)
  42 {
  43         static int once;
  44
  45         if (once++)
  46                 return;
  47
  48         r8a7791_sysc_init();
  49 }