arch/arm/mach-shmobile/board-koelsch-reference.c

   1 /*
   2  * Koelsch board support - Reference DT implementation
   3  *
   4  * Copyright (C) 2013  Renesas Electronics Corporation
   5  * Copyright (C) 2013  Renesas Solutions Corp.
   6  * Copyright (C) 2013  Magnus Damm
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; version 2 of the License.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  */
  21
  22 #include <linux/clk.h>
  23 #include <linux/clkdev.h>
  24 #include <linux/kernel.h>
  25 #include <linux/of_platform.h>
  26 #include <mach/common.h>
  27 #include <mach/rcar-gen2.h>
  28 #include <mach/r8a7791.h>
  29 #include <asm/mach/arch.h>
  30
  31 static void __init koelsch_add_standard_devices(void)
  32 {
  33 #ifdef CONFIG_COMMON_CLK
  34         /*
  35          * This is a really crude hack to provide clkdev support to the SCIF
  36          * and CMT devices until they get moved to DT.
  37          */
  38         static const char * const scif_names[] = {
  39                 "scifa0", "scifa1", "scifb0", "scifb1", "scifb2", "scifa2",
  40                 "scif0", "scif1", "scif2", "scif3", "scif4", "scif5", "scifa3",
  41                 "scifa4", "scifa5",
  42         };
  43         struct clk *clk;
  44         unsigned int i;
  45
  46         for (i = 0; i < ARRAY_SIZE(scif_names); ++i) {
  47                 clk = clk_get(NULL, scif_names[i]);
  48                 if (clk) {
  49                         clk_register_clkdev(clk, NULL, "sh-sci.%u", i);
  50                         clk_put(clk);
  51                 }
  52         }
  53
  54         clk = clk_get(NULL, "cmt0");
  55         if (clk) {
  56                 clk_register_clkdev(clk, NULL, "sh_cmt.0");
  57                 clk_put(clk);
  58         }
  59 #else
  60         r8a7791_clock_init();
  61 #endif
  62         r8a7791_add_dt_devices();
  63         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  64 }
  65
  66 static const char * const koelsch_boards_compat_dt[] __initconst = {
  67         "renesas,koelsch",
  68         "renesas,koelsch-reference",
  69         NULL,
  70 };
  71
  72 DT_MACHINE_START(KOELSCH_DT, "koelsch")
  73         .smp            = smp_ops(r8a7791_smp_ops),
  74         .init_early     = r8a7791_init_early,
  75         .init_time      = rcar_gen2_timer_init,
  76         .init_machine   = koelsch_add_standard_devices,
  77         .init_late      = shmobile_init_late,
  78         .dt_compat      = koelsch_boards_compat_dt,
  79 MACHINE_END