arch/arm/mach-kirkwood/board-dt.c

   1 /*
   2  * Copyright 2012 (C), Jason Cooper <jason@lakedaemon.net>
   3  *
   4  * arch/arm/mach-kirkwood/board-dt.c
   5  *
   6  * Flattened Device Tree board initialization
   7  *
   8  * This file is licensed under the terms of the GNU General Public
   9  * License version 2.  This program is licensed "as is" without any
  10  * warranty of any kind, whether express or implied.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/init.h>
  15 #include <linux/of.h>
  16 #include <linux/of_platform.h>
  17 #include <linux/clk-provider.h>
  18 #include <linux/clk/mvebu.h>
  19 #include <linux/kexec.h>
  20 #include <asm/mach/arch.h>
  21 #include <asm/mach/map.h>
  22 #include <mach/bridge-regs.h>
  23 #include <linux/platform_data/usb-ehci-orion.h>
  24 #include <plat/irq.h>
  25 #include <plat/common.h>
  26 #include "common.h"
  27
  28 static struct of_device_id kirkwood_dt_match_table[] __initdata = {
  29         { .compatible = "simple-bus", },
  30         { }
  31 };
  32
  33 /*
  34  * There are still devices that doesn't know about DT yet.  Get clock
  35  * gates here and add a clock lookup alias, so that old platform
  36  * devices still work.
  37 */
  38
  39 static void __init kirkwood_legacy_clk_init(void)
  40 {
  41
  42         struct device_node *np = of_find_compatible_node(
  43                 NULL, NULL, "marvell,kirkwood-gating-clock");
  44         struct of_phandle_args clkspec;
  45         struct clk *clk;
  46
  47         clkspec.np = np;
  48         clkspec.args_count = 1;
  49
  50         clkspec.args[0] = CGC_BIT_PEX0;
  51         orion_clkdev_add("0", "pcie",
  52                          of_clk_get_from_provider(&clkspec));
  53
  54         clkspec.args[0] = CGC_BIT_PEX1;
  55         orion_clkdev_add("1", "pcie",
  56                          of_clk_get_from_provider(&clkspec));
  57
  58         clkspec.args[0] = CGC_BIT_SDIO;
  59         orion_clkdev_add(NULL, "mvsdio",
  60                          of_clk_get_from_provider(&clkspec));
  61
  62         /*
  63          * The ethernet interfaces forget the MAC address assigned by
  64          * u-boot if the clocks are turned off. Until proper DT support
  65          * is available we always enable them for now.
  66          */
  67         clkspec.args[0] = CGC_BIT_GE0;
  68         clk = of_clk_get_from_provider(&clkspec);
  69         orion_clkdev_add(NULL, "mv643xx_eth_port.0", clk);
  70         clk_prepare_enable(clk);
  71
  72         clkspec.args[0] = CGC_BIT_GE1;
  73         clk = of_clk_get_from_provider(&clkspec);
  74         orion_clkdev_add(NULL, "mv643xx_eth_port.1", clk);
  75         clk_prepare_enable(clk);
  76 }
  77
  78 static void __init kirkwood_of_clk_init(void)
  79 {
  80         mvebu_clocks_init();
  81         kirkwood_legacy_clk_init();
  82 }
  83
  84 static void __init kirkwood_dt_init(void)
  85 {
  86         pr_info("Kirkwood: %s, TCLK=%d.\n", kirkwood_id(), kirkwood_tclk);
  87
  88         /*
  89          * Disable propagation of mbus errors to the CPU local bus,
  90          * as this causes mbus errors (which can occur for example
  91          * for PCI aborts) to throw CPU aborts, which we're not set
  92          * up to deal with.
  93          */
  94         writel(readl(CPU_CONFIG) & ~CPU_CONFIG_ERROR_PROP, CPU_CONFIG);
  95
  96         kirkwood_setup_cpu_mbus();
  97
  98         kirkwood_l2_init();
  99
 100         /* Setup root of clk tree */
 101         kirkwood_of_clk_init();
 102
 103         kirkwood_cpuidle_init();
 104
 105 #ifdef CONFIG_KEXEC
 106         kexec_reinit = kirkwood_enable_pcie;
 107 #endif
 108
 109         if (of_machine_is_compatible("globalscale,dreamplug"))
 110                 dreamplug_init();
 111
 112         if (of_machine_is_compatible("globalscale,guruplug"))
 113                 guruplug_dt_init();
 114
 115         if (of_machine_is_compatible("dlink,dns-kirkwood"))
 116                 dnskw_init();
 117
 118         if (of_machine_is_compatible("iom,iconnect"))
 119                 iconnect_init();
 120
 121         if (of_machine_is_compatible("raidsonic,ib-nas62x0"))
 122                 ib62x0_init();
 123
 124         if (of_machine_is_compatible("qnap,ts219"))
 125                 qnap_dt_ts219_init();
 126
 127         if (of_machine_is_compatible("seagate,dockstar"))
 128                 dockstar_dt_init();
 129
 130         if (of_machine_is_compatible("seagate,goflexnet"))
 131                 goflexnet_init();
 132
 133         if (of_machine_is_compatible("buffalo,lsxl"))
 134                 lsxl_init();
 135
 136         if (of_machine_is_compatible("iom,ix2-200"))
 137                 iomega_ix2_200_init();
 138
 139         if (of_machine_is_compatible("keymile,km_kirkwood"))
 140                 km_kirkwood_init();
 141
 142         if (of_machine_is_compatible("lacie,inetspace_v2") ||
 143             of_machine_is_compatible("lacie,netspace_v2") ||
 144             of_machine_is_compatible("lacie,netspace_max_v2") ||
 145             of_machine_is_compatible("lacie,netspace_lite_v2") ||
 146             of_machine_is_compatible("lacie,netspace_mini_v2"))
 147                 ns2_init();
 148
 149         if (of_machine_is_compatible("mpl,cec4"))
 150                 mplcec4_init();
 151
 152         if (of_machine_is_compatible("plathome,openblocks-a6"))
 153                 openblocks_a6_init();
 154
 155         if (of_machine_is_compatible("usi,topkick"))
 156                 usi_topkick_init();
 157
 158         of_platform_populate(NULL, kirkwood_dt_match_table, NULL, NULL);
 159 }
 160
 161 static const char * const kirkwood_dt_board_compat[] = {
 162         "globalscale,dreamplug",
 163         "globalscale,guruplug",
 164         "dlink,dns-320",
 165         "dlink,dns-325",
 166         "iom,iconnect",
 167         "raidsonic,ib-nas62x0",
 168         "qnap,ts219",
 169         "seagate,dockstar",
 170         "seagate,goflexnet",
 171         "buffalo,lsxl",
 172         "iom,ix2-200",
 173         "keymile,km_kirkwood",
 174         "lacie,inetspace_v2",
 175         "lacie,netspace_max_v2",
 176         "lacie,netspace_v2",
 177         "lacie,netspace_lite_v2",
 178         "lacie,netspace_mini_v2",
 179         "mpl,cec4",
 180         "plathome,openblocks-a6",
 181         "usi,topkick",
 182         "zyxel,nsa310",
 183         NULL
 184 };
 185
 186 DT_MACHINE_START(KIRKWOOD_DT, "Marvell Kirkwood (Flattened Device Tree)")
 187         /* Maintainer: Jason Cooper <jason@lakedaemon.net> */
 188         .map_io         = kirkwood_map_io,
 189         .init_early     = kirkwood_init_early,
 190         .init_irq       = orion_dt_init_irq,
 191         .init_time      = kirkwood_timer_init,
 192         .init_machine   = kirkwood_dt_init,
 193         .restart        = kirkwood_restart,
 194         .dt_compat      = kirkwood_dt_board_compat,
 195 MACHINE_END