clk/x86/clk-lpss-atom.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Intel Low Power Subsystem clocks.
0004  *
0005  * Copyright (C) 2013, Intel Corporation
0006  * Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
0007  *      Heikki Krogerus <heikki.krogerus@linux.intel.com>
0008  */
0009
0010 #include <linux/clk-provider.h>
0011 #include <linux/err.h>
0012 #include <linux/module.h>
0013 #include <linux/platform_data/x86/clk-lpss.h>
0014 #include <linux/platform_device.h>
0015
0016 static int lpss_atom_clk_probe(struct platform_device *pdev)
0017 {
0018     struct lpss_clk_data *drvdata;
0019     struct clk *clk;
0020
0021     drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
0022     if (!drvdata)
0023         return -ENOMEM;
0024
0025     /* LPSS free running clock */
0026     drvdata->name = "lpss_clk";
0027     clk = clk_register_fixed_rate(&pdev->dev, drvdata->name, NULL,
0028                       0, 100000000);
0029     if (IS_ERR(clk))
0030         return PTR_ERR(clk);
0031
0032     drvdata->clk = clk;
0033     platform_set_drvdata(pdev, drvdata);
0034     return 0;
0035 }
0036
0037 static struct platform_driver lpss_atom_clk_driver = {
0038     .driver = {
0039         .name = "clk-lpss-atom",
0040     },
0041     .probe = lpss_atom_clk_probe,
0042 };
0043
0044 int __init lpss_atom_clk_init(void)
0045 {
0046     return platform_driver_register(&lpss_atom_clk_driver);
0047 }