arch/arm/mach-rmobile/cpu_info-rcar.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * arch/arm/cpu/armv7/rmobile/cpu_info-rcar.c
   4  *
   5  * Copyright (C) 2013,2014 Renesas Electronics Corporation
   6  */
   7
   8 #include <asm/io.h>
   9
  10 #define PRR_MASK                0x7fff
  11 #define R8A7796_REV_1_0         0x5200
  12 #define R8A7796_REV_1_1         0x5210
  13 #define R8A7796_REV_1_3         0x5211
  14 #define R8A77995_REV_1_1        0x5810
  15
  16 static u32 renesas_get_prr(void)
  17 {
  18         if (IS_ENABLED(CONFIG_RCAR_64))
  19                 return readl(0xFFF00044);
  20
  21         return readl(0xFF000044);
  22 }
  23
  24 u32 renesas_get_cpu_type(void)
  25 {
  26         return (renesas_get_prr() & 0x00007F00) >> 8;
  27 }
  28
  29 u32 renesas_get_cpu_rev_integer(void)
  30 {
  31         const u32 prr = renesas_get_prr();
  32         const u32 rev = prr & PRR_MASK;
  33
  34         if (rev == R8A7796_REV_1_1 || rev == R8A7796_REV_1_3 ||
  35             rev == R8A77995_REV_1_1)
  36                 return 1;
  37         else
  38                 return ((prr & 0x000000F0) >> 4) + 1;
  39 }
  40
  41 u32 renesas_get_cpu_rev_fraction(void)
  42 {
  43         const u32 prr = renesas_get_prr();
  44         const u32 rev = prr & PRR_MASK;
  45
  46         if (rev == R8A7796_REV_1_1 || rev == R8A77995_REV_1_1)
  47                 return 1;
  48         else if (rev == R8A7796_REV_1_3)
  49                 return 3;
  50         else
  51                 return prr & 0x0000000F;
  52 }