drivers/clk/ux500/abx500-clk.c

   1 /*
   2  * abx500 clock implementation for ux500 platform.
   3  *
   4  * Copyright (C) 2012 ST-Ericsson SA
   5  * Author: Ulf Hansson <ulf.hansson@linaro.org>
   6  *
   7  * License terms: GNU General Public License (GPL) version 2
   8  */
   9
  10 #include <linux/err.h>
  11 #include <linux/module.h>
  12 #include <linux/device.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/mfd/abx500/ab8500.h>
  15
  16 /* TODO: Add clock implementations here */
  17
  18
  19 /* Clock definitions for ab8500 */
  20 static int ab8500_reg_clks(struct device *dev)
  21 {
  22         return 0;
  23 }
  24
  25 /* Clock definitions for ab8540 */
  26 static int ab8540_reg_clks(struct device *dev)
  27 {
  28         return 0;
  29 }
  30
  31 /* Clock definitions for ab9540 */
  32 static int ab9540_reg_clks(struct device *dev)
  33 {
  34         return 0;
  35 }
  36
  37 static int abx500_clk_probe(struct platform_device *pdev)
  38 {
  39         struct ab8500 *parent = dev_get_drvdata(pdev->dev.parent);
  40         int ret;
  41
  42         if (is_ab8500(parent) || is_ab8505(parent)) {
  43                 ret = ab8500_reg_clks(&pdev->dev);
  44         } else if (is_ab8540(parent)) {
  45                 ret = ab8540_reg_clks(&pdev->dev);
  46         } else if (is_ab9540(parent)) {
  47                 ret = ab9540_reg_clks(&pdev->dev);
  48         } else {
  49                 dev_err(&pdev->dev, "non supported plf id\n");
  50                 return -ENODEV;
  51         }
  52
  53         return ret;
  54 }
  55
  56 static struct platform_driver abx500_clk_driver = {
  57         .driver = {
  58                 .name = "abx500-clk",
  59                 .owner = THIS_MODULE,
  60         },
  61         .probe  = abx500_clk_probe,
  62 };
  63
  64 static int __init abx500_clk_init(void)
  65 {
  66         return platform_driver_register(&abx500_clk_driver);
  67 }
  68
  69 arch_initcall(abx500_clk_init);
  70
  71 MODULE_AUTHOR("Ulf Hansson <ulf.hansson@linaro.org");
  72 MODULE_DESCRIPTION("ABX500 clk driver");
  73 MODULE_LICENSE("GPL v2");