arch/arm/mach-bcm/board_bcm281xx.c

   1 /*
   2  * Copyright (C) 2012-2013 Broadcom Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation version 2.
   7  *
   8  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
   9  * kind, whether express or implied; without even the implied warranty
  10  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include <linux/of_platform.h>
  15 #include <linux/init.h>
  16 #include <linux/device.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/clocksource.h>
  19
  20 #include <asm/mach/arch.h>
  21 #include <asm/mach/time.h>
  22 #include <asm/hardware/cache-l2x0.h>
  23
  24 #include "bcm_kona_smc.h"
  25 #include "kona.h"
  26
  27 static int __init kona_l2_cache_init(void)
  28 {
  29         if (!IS_ENABLED(CONFIG_CACHE_L2X0))
  30                 return 0;
  31
  32         if (bcm_kona_smc_init() < 0) {
  33                 pr_info("Kona secure API not available. Skipping L2 init\n");
  34                 return 0;
  35         }
  36
  37         bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);
  38
  39         /*
  40          * The aux_val and aux_mask have no effect since L2 cache is already
  41          * enabled.  Pass 0s for aux_val and 1s for aux_mask for default value.
  42          */
  43         return l2x0_of_init(0, ~0);
  44 }
  45
  46 static void bcm_board_setup_restart(void)
  47 {
  48         struct device_node *np;
  49
  50         np = of_find_compatible_node(NULL, NULL, "brcm,bcm11351");
  51         if (np) {
  52                 if (of_device_is_available(np))
  53                         bcm_kona_setup_restart();
  54                 of_node_put(np);
  55         }
  56         /* Restart setup for other boards goes here */
  57 }
  58
  59 static void __init board_init(void)
  60 {
  61         of_platform_populate(NULL, of_default_bus_match_table, NULL,
  62                 &platform_bus);
  63
  64         bcm_board_setup_restart();
  65         kona_l2_cache_init();
  66 }
  67
  68 static const char * const bcm11351_dt_compat[] = { "brcm,bcm11351", NULL, };
  69
  70 DT_MACHINE_START(BCM11351_DT, "BCM281xx Broadcom Application Processor")
  71         .init_machine = board_init,
  72         .restart = bcm_kona_restart,
  73         .dt_compat = bcm11351_dt_compat,
  74 MACHINE_END