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Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...
[karo-tx-linux.git] / drivers / clk / x86 / clk-lpt.c
1 /*
2  * Intel Low Power Subsystem clocks.
3  *
4  * Copyright (C) 2013, Intel Corporation
5  * Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
6  *          Heikki Krogerus <heikki.krogerus@linux.intel.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12
13 #include <linux/clk.h>
14 #include <linux/clkdev.h>
15 #include <linux/clk-provider.h>
16 #include <linux/err.h>
17 #include <linux/module.h>
18 #include <linux/platform_data/clk-lpss.h>
19 #include <linux/platform_device.h>
20
21 static int lpt_clk_probe(struct platform_device *pdev)
22 {
23         struct lpss_clk_data *drvdata;
24         struct clk *clk;
25
26         drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
27         if (!drvdata)
28                 return -ENOMEM;
29
30         /* LPSS free running clock */
31         drvdata->name = "lpss_clk";
32         clk = clk_register_fixed_rate(&pdev->dev, drvdata->name, NULL,
33                                       CLK_IS_ROOT, 100000000);
34         if (IS_ERR(clk))
35                 return PTR_ERR(clk);
36
37         drvdata->clk = clk;
38         platform_set_drvdata(pdev, drvdata);
39         return 0;
40 }
41
42 static struct platform_driver lpt_clk_driver = {
43         .driver = {
44                 .name = "clk-lpt",
45                 .owner = THIS_MODULE,
46         },
47         .probe = lpt_clk_probe,
48 };
49
50 int __init lpt_clk_init(void)
51 {
52         return platform_driver_register(&lpt_clk_driver);
53 }