drivers/soc/renesas/r8a774c0-sysc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Renesas RZ/G2E System Controller
   4  * Copyright (C) 2018 Renesas Electronics Corp.
   5  *
   6  * Based on Renesas R-Car E3 System Controller
   7  */
   8
   9 #include <linux/bug.h>
  10 #include <linux/kernel.h>
  11 #include <linux/sys_soc.h>
  12
  13 #include <dt-bindings/power/r8a774c0-sysc.h>
  14
  15 #include "rcar-sysc.h"
  16
  17 static struct rcar_sysc_area r8a774c0_areas[] __initdata = {
  18         { "always-on",      0, 0, R8A774C0_PD_ALWAYS_ON, -1, PD_ALWAYS_ON },
  19         { "ca53-scu",   0x140, 0, R8A774C0_PD_CA53_SCU,  R8A774C0_PD_ALWAYS_ON,
  20           PD_SCU },
  21         { "ca53-cpu0",  0x200, 0, R8A774C0_PD_CA53_CPU0, R8A774C0_PD_CA53_SCU,
  22           PD_CPU_NOCR },
  23         { "ca53-cpu1",  0x200, 1, R8A774C0_PD_CA53_CPU1, R8A774C0_PD_CA53_SCU,
  24           PD_CPU_NOCR },
  25         { "a3vc",       0x380, 0, R8A774C0_PD_A3VC,     R8A774C0_PD_ALWAYS_ON },
  26         { "a2vc1",      0x3c0, 1, R8A774C0_PD_A2VC1,    R8A774C0_PD_A3VC },
  27         { "3dg-a",      0x100, 0, R8A774C0_PD_3DG_A,    R8A774C0_PD_ALWAYS_ON },
  28         { "3dg-b",      0x100, 1, R8A774C0_PD_3DG_B,    R8A774C0_PD_3DG_A },
  29 };
  30
  31 static void __init rcar_sysc_fix_parent(struct rcar_sysc_area *areas,
  32                                         unsigned int num_areas, u8 id,
  33                                         int new_parent)
  34 {
  35         unsigned int i;
  36
  37         for (i = 0; i < num_areas; i++)
  38                 if (areas[i].isr_bit == id) {
  39                         areas[i].parent = new_parent;
  40                         return;
  41                 }
  42 }
  43
  44 /* Fixups for RZ/G2E ES1.0 revision */
  45 static const struct soc_device_attribute r8a774c0[] __initconst = {
  46         { .soc_id = "r8a774c0", .revision = "ES1.0" },
  47         { /* sentinel */ }
  48 };
  49
  50 static int __init r8a774c0_sysc_init(void)
  51 {
  52         if (soc_device_match(r8a774c0)) {
  53                 rcar_sysc_fix_parent(r8a774c0_areas,
  54                                      ARRAY_SIZE(r8a774c0_areas),
  55                                      R8A774C0_PD_3DG_A, R8A774C0_PD_3DG_B);
  56                 rcar_sysc_fix_parent(r8a774c0_areas,
  57                                      ARRAY_SIZE(r8a774c0_areas),
  58                                      R8A774C0_PD_3DG_B, R8A774C0_PD_ALWAYS_ON);
  59         }
  60
  61         return 0;
  62 }
  63
  64 const struct rcar_sysc_info r8a774c0_sysc_info __initconst = {
  65         .init = r8a774c0_sysc_init,
  66         .areas = r8a774c0_areas,
  67         .num_areas = ARRAY_SIZE(r8a774c0_areas),
  68 };