drivers/clk/x86/clk-lpt.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Intel Low Power Subsystem clocks.
   4  *
   5  * Copyright (C) 2013, Intel Corporation
   6  * Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
   7  *          Heikki Krogerus <heikki.krogerus@linux.intel.com>
   8  */
   9
  10 #include <linux/clk-provider.h>
  11 #include <linux/err.h>
  12 #include <linux/module.h>
  13 #include <linux/platform_data/x86/clk-lpss.h>
  14 #include <linux/platform_device.h>
  15
  16 static int lpt_clk_probe(struct platform_device *pdev)
  17 {
  18         struct lpss_clk_data *drvdata;
  19         struct clk *clk;
  20
  21         drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
  22         if (!drvdata)
  23                 return -ENOMEM;
  24
  25         /* LPSS free running clock */
  26         drvdata->name = "lpss_clk";
  27         clk = clk_register_fixed_rate(&pdev->dev, drvdata->name, NULL,
  28                                       0, 100000000);
  29         if (IS_ERR(clk))
  30                 return PTR_ERR(clk);
  31
  32         drvdata->clk = clk;
  33         platform_set_drvdata(pdev, drvdata);
  34         return 0;
  35 }
  36
  37 static struct platform_driver lpt_clk_driver = {
  38         .driver = {
  39                 .name = "clk-lpt",
  40         },
  41         .probe = lpt_clk_probe,
  42 };
  43
  44 int __init lpt_clk_init(void)
  45 {
  46         return platform_driver_register(&lpt_clk_driver);
  47 }