release/src-rt-6.x.4708/linux/linux-2.6.36/arch/avr32/mach-at32ap/pdc.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 static int __init pdc_probe(struct platform_device *pdev)
  15 {
  16         struct clk *pclk, *hclk;
  17
  18         pclk = clk_get(&pdev->dev, "pclk");
  19         if (IS_ERR(pclk)) {
  20                 dev_err(&pdev->dev, "no pclk defined\n");
  21                 return PTR_ERR(pclk);
  22         }
  23         hclk = clk_get(&pdev->dev, "hclk");
  24         if (IS_ERR(hclk)) {
  25                 dev_err(&pdev->dev, "no hclk defined\n");
  26                 clk_put(pclk);
  27                 return PTR_ERR(hclk);
  28         }
  29
  30         clk_enable(pclk);
  31         clk_enable(hclk);
  32
  33         dev_info(&pdev->dev, "Atmel Peripheral DMA Controller enabled\n");
  34         return 0;
  35 }
  36
  37 static struct platform_driver pdc_driver = {
  38         .driver         = {
  39                 .name   = "pdc",
  40         },
  41 };
  42
  43 static int __init pdc_init(void)
  44 {
  45         return platform_driver_probe(&pdc_driver, pdc_probe);
  46 }
  47 arch_initcall(pdc_init);