arch/avr32/mach-at32ap/at32ap.c

   1 /*
   2  * Copyright (C) 2006 Atmel Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 #include <linux/clk.h>
  10 #include <linux/err.h>
  11 #include <linux/init.h>
  12 #include <linux/platform_device.h>
  13
  14 #include <asm/io.h>
  15
  16 #include <asm/arch/init.h>
  17 #include <asm/arch/sm.h>
  18
  19 struct at32_sm system_manager;
  20
  21 static int __init at32_sm_init(void)
  22 {
  23         struct resource *regs;
  24         struct at32_sm *sm = &system_manager;
  25         int ret = -ENXIO;
  26
  27         regs = platform_get_resource(&at32_sm_device, IORESOURCE_MEM, 0);
  28         if (!regs)
  29                 goto fail;
  30
  31         spin_lock_init(&sm->lock);
  32         sm->pdev = &at32_sm_device;
  33
  34         ret = -ENOMEM;
  35         sm->regs = ioremap(regs->start, regs->end - regs->start + 1);
  36         if (!sm->regs)
  37                 goto fail;
  38
  39         return 0;
  40
  41 fail:
  42         printk(KERN_ERR "Failed to initialize System Manager: %d\n", ret);
  43         return ret;
  44 }
  45
  46 void __init setup_platform(void)
  47 {
  48         at32_sm_init();
  49         at32_clock_init();
  50         at32_portmux_init();
  51 }
  52
  53 static int __init pdc_probe(struct platform_device *pdev)
  54 {
  55         struct clk *pclk, *hclk;
  56
  57         pclk = clk_get(&pdev->dev, "pclk");
  58         if (IS_ERR(pclk)) {
  59                 dev_err(&pdev->dev, "no pclk defined\n");
  60                 return PTR_ERR(pclk);
  61         }
  62         hclk = clk_get(&pdev->dev, "hclk");
  63         if (IS_ERR(hclk)) {
  64                 dev_err(&pdev->dev, "no hclk defined\n");
  65                 clk_put(pclk);
  66                 return PTR_ERR(hclk);
  67         }
  68
  69         clk_enable(pclk);
  70         clk_enable(hclk);
  71
  72         dev_info(&pdev->dev, "Atmel Peripheral DMA Controller enabled\n");
  73         return 0;
  74 }
  75
  76 static struct platform_driver pdc_driver = {
  77         .probe          = pdc_probe,
  78         .driver         = {
  79                 .name   = "pdc",
  80         },
  81 };
  82
  83 static int __init pdc_init(void)
  84 {
  85         return platform_driver_register(&pdc_driver);
  86 }
  87 arch_initcall(pdc_init);