arch/arm/mach-rmobile/cpu_info-rzg2l.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2021,2023 Renesas Electronics Corporation
   4  *
   5  */
   6
   7 #include <mach/renesas.h>
   8 #include <asm/io.h>
   9 #include <linux/libfdt.h>
  10
  11 #define SYSC_LSI_DEVID          0x11020A04
  12
  13 /* If the firmware passed a device tree, use it for soc identification. */
  14 extern u64 rcar_atf_boot_args[];
  15
  16 /* CPU information table */
  17 struct tfa_info {
  18         const char *soc_name;
  19         const char *cpu_name;
  20         u32 cpu_type;
  21 };
  22
  23 static const struct tfa_info tfa_info[] = {
  24         { "renesas,r9a07g044l2", "R9A07G044L", RENESAS_CPU_TYPE_R9A07G044L },
  25 };
  26
  27 static const struct tfa_info invalid_tfa_info = { NULL, "(invalid)", 0 };
  28
  29 static const struct tfa_info *get_tfa_info(void)
  30 {
  31         void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]);
  32
  33         if (fdt_magic(atf_fdt_blob) == FDT_MAGIC) {
  34                 unsigned int i;
  35                 for (i = 0; i < ARRAY_SIZE(tfa_info); i++) {
  36                         if (!fdt_node_check_compatible(atf_fdt_blob, 0,
  37                                                        tfa_info[i].soc_name))
  38                                 return &tfa_info[i];
  39                 }
  40         }
  41
  42         return &invalid_tfa_info;
  43 }
  44
  45 const u8 *rzg_get_cpu_name(void)
  46 {
  47         return get_tfa_info()->cpu_name;
  48 }
  49
  50 u32 renesas_get_cpu_type(void)
  51 {
  52         return get_tfa_info()->cpu_type;
  53 }
  54
  55 u32 renesas_get_cpu_rev_integer(void)
  56 {
  57         return (readl(SYSC_LSI_DEVID) >> 28) + 1;
  58 }
  59
  60 u32 renesas_get_cpu_rev_fraction(void)
  61 {
  62         return 0;
  63 }