arch/powerpc/platforms/85xx/ppa8548.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * ppa8548 setup and early boot code.
   4  *
   5  * Copyright 2009 Prodrive B.V..
   6  *
   7  * By Stef van Os (see MAINTAINERS for contact information)
   8  *
   9  * Based on the SBC8548 support - Copyright 2007 Wind River Systems Inc.
  10  * Based on the MPC8548CDS support - Copyright 2005 Freescale Inc.
  11  */
  12
  13 #include <linux/stddef.h>
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/reboot.h>
  17 #include <linux/seq_file.h>
  18 #include <linux/of_fdt.h>
  19 #include <linux/of_platform.h>
  20
  21 #include <asm/machdep.h>
  22 #include <asm/udbg.h>
  23 #include <asm/mpic.h>
  24
  25 #include <sysdev/fsl_soc.h>
  26
  27 static void __init ppa8548_pic_init(void)
  28 {
  29         struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
  30                         0, 256, " OpenPIC  ");
  31         BUG_ON(mpic == NULL);
  32         mpic_init(mpic);
  33 }
  34
  35 /*
  36  * Setup the architecture
  37  */
  38 static void __init ppa8548_setup_arch(void)
  39 {
  40         if (ppc_md.progress)
  41                 ppc_md.progress("ppa8548_setup_arch()", 0);
  42 }
  43
  44 static void ppa8548_show_cpuinfo(struct seq_file *m)
  45 {
  46         uint32_t svid, phid1;
  47
  48         svid = mfspr(SPRN_SVR);
  49
  50         seq_printf(m, "Vendor\t\t: Prodrive B.V.\n");
  51         seq_printf(m, "SVR\t\t: 0x%x\n", svid);
  52
  53         /* Display cpu Pll setting */
  54         phid1 = mfspr(SPRN_HID1);
  55         seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
  56 }
  57
  58 static const struct of_device_id of_bus_ids[] __initconst = {
  59         { .name = "soc", },
  60         { .type = "soc", },
  61         { .compatible = "simple-bus", },
  62         { .compatible = "gianfar", },
  63         { .compatible = "fsl,srio", },
  64         {},
  65 };
  66
  67 static int __init declare_of_platform_devices(void)
  68 {
  69         of_platform_bus_probe(NULL, of_bus_ids, NULL);
  70
  71         return 0;
  72 }
  73 machine_device_initcall(ppa8548, declare_of_platform_devices);
  74
  75 /*
  76  * Called very early, device-tree isn't unflattened
  77  */
  78 static int __init ppa8548_probe(void)
  79 {
  80         return of_machine_is_compatible("ppa8548");
  81 }
  82
  83 define_machine(ppa8548) {
  84         .name           = "ppa8548",
  85         .probe          = ppa8548_probe,
  86         .setup_arch     = ppa8548_setup_arch,
  87         .init_IRQ       = ppa8548_pic_init,
  88         .show_cpuinfo   = ppa8548_show_cpuinfo,
  89         .get_irq        = mpic_get_irq,
  90         .calibrate_decr = generic_calibrate_decr,
  91         .progress       = udbg_progress,
  92 };