drivers/soc/renesas/r8a7795-sysc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Renesas R-Car H3 System Controller
   4  *
   5  * Copyright (C) 2016-2017 Glider bvba
   6  */
   7
   8 #include <linux/bits.h>
   9 #include <linux/kernel.h>
  10 #include <linux/sys_soc.h>
  11
  12 #include <dt-bindings/power/r8a7795-sysc.h>
  13
  14 #include "rcar-sysc.h"
  15
  16 static struct rcar_sysc_area r8a7795_areas[] __initdata = {
  17         { "always-on",      0, 0, R8A7795_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
  18         { "ca57-scu",   0x1c0, 0, R8A7795_PD_CA57_SCU,  R8A7795_PD_ALWAYS_ON,
  19           PD_SCU },
  20         { "ca57-cpu0",   0x80, 0, R8A7795_PD_CA57_CPU0, R8A7795_PD_CA57_SCU,
  21           PD_CPU_NOCR },
  22         { "ca57-cpu1",   0x80, 1, R8A7795_PD_CA57_CPU1, R8A7795_PD_CA57_SCU,
  23           PD_CPU_NOCR },
  24         { "ca57-cpu2",   0x80, 2, R8A7795_PD_CA57_CPU2, R8A7795_PD_CA57_SCU,
  25           PD_CPU_NOCR },
  26         { "ca57-cpu3",   0x80, 3, R8A7795_PD_CA57_CPU3, R8A7795_PD_CA57_SCU,
  27           PD_CPU_NOCR },
  28         { "ca53-scu",   0x140, 0, R8A7795_PD_CA53_SCU,  R8A7795_PD_ALWAYS_ON,
  29           PD_SCU },
  30         { "ca53-cpu0",  0x200, 0, R8A7795_PD_CA53_CPU0, R8A7795_PD_CA53_SCU,
  31           PD_CPU_NOCR },
  32         { "ca53-cpu1",  0x200, 1, R8A7795_PD_CA53_CPU1, R8A7795_PD_CA53_SCU,
  33           PD_CPU_NOCR },
  34         { "ca53-cpu2",  0x200, 2, R8A7795_PD_CA53_CPU2, R8A7795_PD_CA53_SCU,
  35           PD_CPU_NOCR },
  36         { "ca53-cpu3",  0x200, 3, R8A7795_PD_CA53_CPU3, R8A7795_PD_CA53_SCU,
  37           PD_CPU_NOCR },
  38         { "a3vp",       0x340, 0, R8A7795_PD_A3VP,      R8A7795_PD_ALWAYS_ON },
  39         { "cr7",        0x240, 0, R8A7795_PD_CR7,       R8A7795_PD_ALWAYS_ON },
  40         { "a3vc",       0x380, 0, R8A7795_PD_A3VC,      R8A7795_PD_ALWAYS_ON },
  41         /* A2VC0 exists on ES1.x only */
  42         { "a2vc0",      0x3c0, 0, R8A7795_PD_A2VC0,     R8A7795_PD_A3VC },
  43         { "a2vc1",      0x3c0, 1, R8A7795_PD_A2VC1,     R8A7795_PD_A3VC },
  44         { "3dg-a",      0x100, 0, R8A7795_PD_3DG_A,     R8A7795_PD_ALWAYS_ON },
  45         { "3dg-b",      0x100, 1, R8A7795_PD_3DG_B,     R8A7795_PD_3DG_A },
  46         { "3dg-c",      0x100, 2, R8A7795_PD_3DG_C,     R8A7795_PD_3DG_B },
  47         { "3dg-d",      0x100, 3, R8A7795_PD_3DG_D,     R8A7795_PD_3DG_C },
  48         { "3dg-e",      0x100, 4, R8A7795_PD_3DG_E,     R8A7795_PD_3DG_D },
  49         { "a3ir",       0x180, 0, R8A7795_PD_A3IR,      R8A7795_PD_ALWAYS_ON },
  50 };
  51
  52
  53         /*
  54          * Fixups for R-Car H3 revisions
  55          */
  56
  57 #define HAS_A2VC0       BIT(0)          /* Power domain A2VC0 is present */
  58 #define NO_EXTMASK      BIT(1)          /* Missing SYSCEXTMASK register */
  59
  60 static const struct soc_device_attribute r8a7795_quirks_match[] __initconst = {
  61         {
  62                 .soc_id = "r8a7795", .revision = "ES1.*",
  63                 .data = (void *)(HAS_A2VC0 | NO_EXTMASK),
  64         }, {
  65                 .soc_id = "r8a7795", .revision = "ES2.*",
  66                 .data = (void *)(NO_EXTMASK),
  67         },
  68         { /* sentinel */ }
  69 };
  70
  71 static int __init r8a7795_sysc_init(void)
  72 {
  73         const struct soc_device_attribute *attr;
  74         u32 quirks = 0;
  75
  76         attr = soc_device_match(r8a7795_quirks_match);
  77         if (attr)
  78                 quirks = (uintptr_t)attr->data;
  79
  80         if (!(quirks & HAS_A2VC0))
  81                 rcar_sysc_nullify(r8a7795_areas, ARRAY_SIZE(r8a7795_areas),
  82                                   R8A7795_PD_A2VC0);
  83
  84         if (quirks & NO_EXTMASK)
  85                 r8a7795_sysc_info.extmask_val = 0;
  86
  87         return 0;
  88 }
  89
  90 struct rcar_sysc_info r8a7795_sysc_info __initdata = {
  91         .init = r8a7795_sysc_init,
  92         .areas = r8a7795_areas,
  93         .num_areas = ARRAY_SIZE(r8a7795_areas),
  94         .extmask_offs = 0x2f8,
  95         .extmask_val = BIT(0),
  96 };